CN115836906A - Ablation needle system - Google Patents

Abstract

The invention relates to an ablation needle system, relates to the technical field of ablation, and is used for improving flexibility performance while ensuring easy operation. The ablation needle system of the present invention includes a non-vacuum fluid transmission device, which includes a first transmission unit and a second transmission unit that communicate with each other, and the second transmission unit includes a second inlet tube and a second return tube; and the ablation needle , which is detachably connected with the second transmission unit, the ablation needle includes a sealed vacuum jacket and an inlet-reflux assembly that passes through the sealed vacuum jacket and forms a vacuum connection with it; the inlet-reflux assembly includes the The second inlet tube is in fluid communication with the inlet core tube forming the inflow passage and the inner tube sleeved outside the inlet core tube, the inner tube is in fluid communication with the second return tube; wherein, the At least a part of the inner tube is provided with a buffer device.

Description

Ablation needle system

This application is a divisional application with the application number CN202210817968.8 and the invention name "Non-vacuum fluid transmission device and ablation needle system".

technical field

The invention relates to the technical field of ablation, in particular to an ablation needle system.

Background technique

In the surgical operation of using cold and heat ablation to eliminate the target tissue, it is necessary to use the transmission device to connect the cryosurgery system with the ablation needle, and deliver the treatment medium to the patient's lesion, so as to absorb heat through the evaporation of liquid refrigerant, and take away The heat of the lesion tissue lowers the temperature of the target ablation site, thereby destroying the diseased cells and tissues to achieve the purpose of treatment. In the existing ablation needle system, the transmission device and the ablation needle are generally coaxial, which causes the system to be too large in the length direction, which is not conducive to operation; and the flexibility performance needs to be improved.

Contents of the invention

The invention provides an ablation needle system, which is used to improve flexibility performance while ensuring easy operation.

According to the first aspect of the present invention, the present invention provides a non-vacuum fluid transfer device, comprising a first transfer unit and a second transfer unit communicated with each other, the first transfer unit is used to transfer fluid to the second transfer unit , or receive fluid returned from the second delivery unit;

The first transmission unit includes a first inlet pipe, a first return pipe and an outer casing, and the first inlet pipe and the first return pipe are arranged side by side inside the outer casing;

The second transmission unit includes:

The second inlet pipe is provided with a first adapter device, and the second inlet pipe communicates with the first inlet pipe through the first adapter device. In the first inlet pipe, the flow of fluid is redirected by the first transition device to flow into the second inlet tube; and

The second return pipe is sleeved on the outside of the second inlet pipe, the second return pipe is provided with a second adapter, and the second return pipe is connected to the second adapter through the second adapter. The first return pipe is connected, and the flow direction of the fluid in the second return pipe is redirected by the second adapter device to return to the first return pipe;

Wherein, the first adapter device is connected to the second adapter device through cooperation.

In one embodiment, the first adapter device includes an adapter, and the adapter is provided with a first matching hole and a second matching hole forming fluid communication;

The first matching hole extends along a first direction for accommodating the first inlet pipe;

The second matching hole is configured as a stepped hole extending along a second direction forming an included angle with the first direction, and the second matching hole is used to accommodate the second inlet pipe;

The second inlet pipe has a matching end surface, and the matching end surface abuts against the upper step surface in the second matching hole.

In one embodiment, the second adapter device includes a three-way adapter, and the three-way adapter is provided with a third matching hole and a fourth matching hole;

The third matching hole extends along the first direction and is used to accommodate the first return pipe of the rod;

The fourth matching hole is configured as a stepped hole passing through the tee adapter in the second direction, the fourth matching hole is used to accommodate the second return pipe, and the second return pipe The through end surface abuts against the lower step surface in the fourth matching hole;

Wherein, the third matching hole, the fourth matching hole, the second matching hole and the first matching hole are in fluid communication.

In one embodiment, the adapter is configured as an L-shaped structure, the portion of the adapter extending along the second direction is provided with a positioning platform and a first tapered outer wall extending from the positioning platform, the first The tapered outer wall extends into the fourth matching hole, and the end of the three-way adapter abuts against the positioning platform.

In one embodiment, the first transmission unit further includes:

a thermal insulation part, which is located in the outer casing and wraps on the outer walls of the first inlet pipe and the first return pipe; and

a flexible reinforcement part, which is disposed between the heat insulating part and the inner wall of the outer casing, and is used to support the first inlet pipe and the first return pipe;

Wherein, the flexible reinforcing part extends in a helical manner along the axial direction of the outer casing.

In one embodiment, the second transmission unit further includes:

a handle assembly, one side of which is sealingly connected to said outer sleeve, said handle assembly receiving said first adapter means and said second adapter means; and

A first quick connection device, the other side of the handle assembly is sealingly connected with the first quick connection device, and the first quick connection device accommodates the second inlet pipe and the second return pipe.

In one embodiment, an airgel material is filled between the outer casing, the thermal insulation part and the flexible reinforcing part;

An airgel material is filled between the handle assembly and the first transition device and the second transition device.

In one embodiment, a fitting groove is provided on the outer wall of the first quick connection device, the fitting groove has an inclined wall, and the fitting groove is used to form a rolling engagement connection with the second quick connection device of the ablation needle Or elastic snap connection.

In one embodiment, the first quick connection device has a wedge-shaped end surface, and a return hole extending along the axial direction of the first quick connection device is provided on the wedge-shaped end surface, and the return hole is connected to the second return flow hole. The tubes are in fluid communication.

According to the second aspect of the present invention, the present invention provides an ablation needle system, which includes the above-mentioned non-vacuum fluid transmission device, and also includes an ablation needle, and the ablation needle is detachably connected to the second transmission unit;

The ablation needle includes a sealed vacuum jacket and an inlet-reflux assembly that passes through the sealed vacuum jacket and forms a vacuum connection with it;

The inlet and return assembly includes an inlet core tube in fluid communication with the second inlet tube and an inner tube sleeved on the outside of the inlet core tube, and the inner tube is in fluid communication with the second return tube ;

Wherein, at least a part of the inner tube is provided with a buffer device.

In one embodiment, an outer tube is sheathed outside the inner tube, and a thin film getter is attached to the outer wall of the inner tube and the inner wall of the outer tube.

In one embodiment, the ablation needle further includes an integral or split needle point and an energy exchange tube, and the energy exchange tube is directly or indirectly connected to the outer tube;

The energy exchange tube includes a thermal insulation cavity and a heat exchange cavity that are physically separated along its axial direction, and the inlet core tube extends into the heat exchange cavity; the heat exchange cavity is respectively connected to the inlet core tube It is in fluid communication with the inner tube, so that the fluid flowing out of the inlet core tube turns back in the heat exchange cavity and flows back between the inlet core tube and the inner tube.

In one embodiment, the ablation needle further includes a conversion sleeve and a second quick connection device sealingly connected with the conversion sleeve;

The transition sleeve includes a sealed chamber, a guide tube passing through the sealed chamber, and drainage holes arranged around the guide tube, the drainage hole is in fluid communication with the sealed chamber, and the inlet core a tube runs through the guide tube;

The second inlet pipe and the second return pipe run through the second quick connection device and extend into the sealed chamber;

Wherein, the second inlet pipe is in fluid communication with the inlet core pipe to form an inlet passage;

The second return pipe is in fluid communication with the return path formed by the drainage hole and the sealed chamber to form a return path;

The axial distance between the inner wall of the sealed chamber and the seal in the second quick connection device is related to the low temperature resistance of the seal;

Wherein, the seal is used to form a seal between the second quick connection device and the first quick connection device of the non-vacuum fluid transfer device.

In one embodiment, the ablation needle further includes a sealing vacuum jacket, and the sealing vacuum jacket is provided with a flow-in/reflux and a sealing hole, and the flow-in/reflux component passes through the flow-in/reflux and sealing hole;

The sealing vacuum jacket is also provided with at least 4 sealing ports distributed along the circumferential direction of the inlet and return flow and sealing holes.

According to the third aspect of the present invention, the present invention provides a fluid channel, more specifically, the present invention provides a fluid channel of an ablation needle system, which includes an inflow path and a return flow path;

Wherein, the inflow path includes a first section of the inflow path and a second section of the inflow path, and the flow direction of the fluid in the first section of the inflow path is redirected to flow into the second section of the inflow path;

The backflow path includes a third backflow path and a fourth backflow path, and the flow direction of the fluid in the third backflow path is redirected to flow into the fourth backflow path;

Wherein, the flow direction of the fluid in the first segment of the inflow path is opposite to the flow direction of the fluid in the fourth segment of the return path, and the flow direction of the fluid in the second segment of the inflow path is opposite to the flow direction of the fluid in the third segment of the return path.

In one embodiment, the inflow path further includes a third section of the inflow path, wherein the first section of the inflow path, the second section of the inflow path, and the third section of the inflow path are controlled by the first transmission unit and the second transmission unit. , the ablation needle, the first adapter and the second adapter.

In one embodiment, the first transmission unit includes a first inflow tube, the second transmission unit includes a second inflow tube, the ablation needle includes an inflow core tube, and the first segment of the inflow path is formed by the first inflow tube of the first transmission unit. The inlet tube defines the second segment of the inlet path is defined by the second inlet tube of the second transmission unit, and the third segment of the inlet path is defined by the inlet core tube of the ablation needle.

In one embodiment, the axes of the first inlet pipe and the second inlet pipe are vertical, and the first inlet pipe is in fluid communication with the second inlet pipe through the first adapter device; the first inlet pipe passes through the first The adapter is redirected to flow into the second inlet tube;

The first adapter device includes an adapter, which is used to make the first inlet pipe and the second inlet pipe form fluid communication, and the adapter is provided with a first matching hole and a second matching hole for forming fluid communication; wherein, The first matching hole extends along the first direction and is used to accommodate the first inlet pipe; the second matching hole is a stepped hole extending along the second direction forming an angle with the first direction, and the second matching hole is used to accommodate the first inlet pipe. Secondary flow tube.

In one embodiment, the ablation needle further includes a conversion sleeve and a second quick connection device that is sealed and connected with the conversion sleeve, the conversion sleeve includes a sealed chamber and a guide tube that runs through the sealed chamber, and the inlet core tube runs through the guide tube; the second An inlet tube extends through the second quick-connect device and into the sealed chamber of the conversion sleeve; the second inlet tube accommodates part of the guide tube and thus part of the inlet core tube, thereby being in fluid communication with the inlet core tube.

The second inlet pipe and the second return pipe run through the second quick connection device and extend into the sealed chamber of the conversion sleeve. The inlet core pipe runs through the guide pipe and is sealed with the guide pipe at the end side. The inlet core pipe is connected with the guide pipe. The guide tube extends into the second inlet tube together, so that the inlet core tube and the second inlet tube are in fluid communication.

In one embodiment, the return path further includes a first section of return path and a second section of return path, and the first section of return path, the second section of return path, the third section of return path and the fourth section of return path are transmitted by the first section The unit, the second delivery unit, the ablation needle, the first adapter and the second adapter are defined.

In one embodiment, the ablation needle further includes an inlet-reflux assembly, and the inlet-reflux assembly includes an inlet core tube in fluid communication with the second inlet tube and an inner tube sheathed on the outside of the inlet core tube, and the inner tube is connected to the second inlet tube. The return pipe is in fluid communication; the first section of the return path is defined by the inner wall of the inner pipe and the outer wall of the inlet core pipe.

In one embodiment, the end of the conversion sleeve opposite to the sealing chamber is also provided with a groove in fluid communication with the sealing chamber; the groove is in fluid communication with the sealing chamber through a drainage hole, and a sealing The drainage hole extending from the chamber; the drainage hole is located in the circumferential direction of the guide tube, and the drainage hole is in fluid communication with the groove and the sealing chamber respectively. limited.

In one embodiment, the inner tube is fitly connected with the groove, and the end of the inner tube abuts against the inner wall of the groove, and the inlet core tube is fitly connected with the guide tube, so that the inner wall of the inner tube is in contact with the inner wall of the inlet core tube. The first segment of the return path jointly defined by the outer walls is in fluid communication with the drainage hole, so that the first segment of the return path is in fluid communication with the second segment of the return path.

In one embodiment, in the axial direction, the sum of the depth of the groove and the depth of the drainage hole is the axial wall thickness of the sealed chamber.

In one embodiment, the return flow path of the third section is defined by the return hole of the first quick connection device, the inner wall of the second return pipe and the outer wall of the second inlet pipe; Sealed connection, the return hole at the end of the first quick connection device is in fluid communication with the sealed chamber, so that the second segment of the return path and the third segment of the return path are in fluid communication.

In one embodiment, the fourth segment of the return path is defined by the first return pipe, the first return pipe communicates with the second return pipe through the second transition device, and the flow direction of the fluid in the second return pipe passes through the second transition device Make a diversion to return to the first return line.

The axes of the first inlet pipe and the second inlet pipe are perpendicular, the second adapter device includes a three-way adapter, and the three-way adapter is used for sealing connection with the adapter; a third matching hole is arranged in the three-way adapter and the fourth matching hole; the third matching hole is used to accommodate the first return pipe, the fourth matching hole is configured as a stepped hole passing through the three-way adapter, and one side of the fourth matching hole accommodates the first tapered hole of the adapter The outer wall, so that the three-way adapter and the adapter form a sealed connection there, the other side of the fourth matching hole accommodates the second return pipe, and the through end surface of the second return pipe is offset against the lower step surface in the fourth matching hole Then, the third matching hole, the fourth matching hole, the second matching hole and the first matching hole are in fluid communication, so that the third section of the return path and the fourth section of the return path are in fluid communication. Compared with the prior art, the present invention has the advantage that, through the cooperation of the first transfer device with the first transfer unit, the cooperation of the second transfer unit with the second transfer device and the cooperation of the first transfer device with the second transfer device Cooperating with the connection device, the fluid in the first transmission unit can change the flow direction and then flow into the second transmission unit, so that the size of the non-vacuum fluid transmission device in the length direction will not be too large, and the first transmission unit and the second transmission unit The included angle between the transmission units is more conducive to puncture and positioning; in addition, since the first transmission unit and the second transmission unit are both non-vacuum structures, their flexibility can be improved.

Description of drawings

Hereinafter, the present invention will be described in more detail based on the embodiments with reference to the accompanying drawings.

Fig. 1 is an axial sectional view of a non-vacuum fluid transmission device in an embodiment of the present invention when it is installed and used;

2 is an axial sectional view of a non-vacuum fluid transfer device in an embodiment of the present invention;

Fig. 3 is a cross-sectional view of the non-vacuum fluid transfer device shown in Fig. 2, in which parts such as the handle assembly and the outer sleeve are hidden in order to more clearly show the first adapter device and the second adapter device;

Fig. 4 is an axial sectional view of the first adapter device shown in Fig. 3;

Fig. 5 is an axial sectional view of the second adapter shown in Fig. 3;

Fig. 6 is the view of the radial observation of the non-vacuum fluid transfer device shown in Fig. 2;

Fig. 7 is an axial sectional view of an ablation needle matched with a non-vacuum fluid transfer device in an embodiment of the present invention;

Fig. 8 is an axial sectional view of the inlet and return assembly in Fig. 7;

Figure 9 is an enlarged view of Figure 8 at N;

Figure 10 is an enlarged view of Figure 8 at P;

Fig. 11 is an axial sectional view of the energy exchange tube shown in Fig. 8;

Fig. 12 is an axial sectional view of the conversion sleeve shown in Fig. 8;

Fig. 13 is a schematic diagram of cooperation between the conversion sleeve shown in Fig. 8 and the inlet core pipe and the inner pipe;

Fig. 14 is an axial sectional view of the sealed vacuum jacket shown in Fig. 7;

Figure 15 is a side view of the sealed vacuum jacket shown in Figure 7;

Figure 16 is an enlarged view of one embodiment of the right part of the ablation needle of the present invention;

Fig. 17 is an enlarged view of another embodiment of the right part of the ablation needle of the present invention;

Figure 18 is an enlarged view of Figure 1 at M;

Figure 19 is an enlarged view of Figure 1 at Q;

Fig. 20 is a radial cross-sectional view of the second quick connection device of the ablation needle system of the present invention connected to the first quick connection device;

Fig. 21 is an axial sectional view of the first quick connection device shown in Fig. 2;

Fig. 22 is an axial sectional view after the second quick connection device is connected to the first quick connection device in another embodiment of the ablation needle system of the present invention;

Fig. 23 is an enlarged view of the upper part of the ablation needle system shown in Fig. 22;

Fig. 24 is an axial sectional view of the second quick connection device shown in Fig. 22;

Fig. 25 is an axial sectional view of the elastic top ball shown in Fig. 23;

Fig. 26 is an axial sectional view of the first quick connection device and the conversion sleeve connected in the embodiment of the present invention.

Reference signs:

100 - the first transmission unit;

110-first inlet pipe; 120-first return pipe; 130-insulation part; 140-flexible reinforcement part; 150-outer sleeve;

200 - the second transmission unit;

210-second inlet pipe; 220-second return pipe; 230-first adapter device; 240-second adapter device; 260-first quick connection device; 270-handle assembly; 211-matching end face; 221 - through the end face;

231-adapter; 232-the first matching hole; 233-the second matching hole; 234-the upper step surface; 235-the second conical outer wall; 237-the first conical outer wall; 236-positioning platform;

241-tee adapter; 242-the third matching hole; 243-the fourth matching hole; 244-the lower step surface;

261-fitting groove; 2611-inclined wall; 262-return hole; 263-wedge-shaped end face;

300-ablation needle; 310-inlet and return assembly;

311-needle tip; 312-energy exchange tube; 313-inner tube; 314-outer tube; 315-conversion sleeve; 316-buffer device; 317-inflow core tube; 318-connecting tube;

301-second quick connection device; 302-sealing vacuum jacket; 303-protective sleeve;

304-elastic moving sleeve; 3041-elastic part; 3042-top block;

305-getter; 306-seal;

307-elastic snapping element; 3071-top bead; 3072-spring; 3073-plunger;

308-connection sleeve; 3081-connection hole; 3082-seal groove; 3083-depression;

3011-first flange; 3012-ball; 3013-second flange; 3014-ball hole;

3021-first cavity; 3022-second cavity; 3023-sealing port; 3024-inlet and return and sealing hole; 3025-matching table;

3031-matching groove;

3121-heat insulation cavity; 3122-heat exchange cavity;

3151-seal chamber; 3152-guide tube; 3153-connecting boss; 3154-groove; 3155-drainage hole;

31-the first section of return flow path; 32-the second section of return flow path; 33-the third section of return flow path; 34-the fourth section of return flow path.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing.

According to the first aspect of the present invention, the present invention provides a non-vacuum fluid transfer device, more specifically, it is used in the ablation needle system, as shown in Figure 1, the non-vacuum fluid transfer device of the present invention can be used in the ablation needle system The ablation needle 300 in the ablation needle 300 transmits fluid or receives fluid returned from the ablation needle 300 . Wherein, the fluid described herein may be a working fluid suitable for cold and hot ablation therapy, such as liquid nitrogen and absolute ethanol.

As shown in FIG. 2 and FIG. 3 , the non-vacuum fluid transfer device of the present invention includes a first transfer unit 100 and a second transfer unit 200 connected to each other, the first transfer unit 100 is used to transfer fluid to the second transfer unit 200, Or receive fluid returned from the second transport unit 200 .

The first transmission unit 100 includes a first inlet pipe 110, a first return pipe 120 and an outer casing 150, and the first inlet pipe 110 and the first return pipe 120 are arranged side by side inside the outer casing 150, so that the first The transmission unit 100 is integrally formed, thereby facilitating miniaturization and weight reduction of the device.

The second transmission unit 200 includes a second inlet pipe 210 and a second return pipe 220 . The second inlet pipe 210 is provided with a first adapter device 230, the second inlet pipe 210 communicates with the first inlet pipe 110 through the first adapter device 230, and the flow direction of the fluid in the first inlet pipe 110 passes through The first transition device 230 is redirected to flow into the second inlet pipe 210 . The second return pipe 220 is sleeved on the outside of the second inlet pipe 210, and the second return pipe 220 is provided with a second adapter device 240, and the second return pipe 220 is connected to the first return pipe 120 through the second adapter device 240. In communication with each other, the flow direction of the fluid in the second return pipe 220 is redirected by the second adapter device 240 to return to the first return pipe 120 .

Wherein, the first adapter device 230 is connected with the second adapter device 240 through cooperation.

The first inlet pipe 110 and the first return pipe 120 can extend along the X direction shown in FIG. 2 , and the second inlet pipe 210 and the second return pipe 220 can extend along the Y direction shown in FIG. The flow pipe 110 and the second inlet pipe 210 are approximately vertical, and the first return pipe 120 and the second return pipe 220 are approximately vertical, so that the volume of the non-vacuum fluid transfer device can be reduced and the space can be maximized. In addition, the second inlet tube 210 and the second return tube 220 of the non-vacuum fluid delivery device are redirected relative to the first inlet tube 110 and the first return tube 120, so when used in combination with the ablation needle 300, it can It is convenient for operations such as puncture positioning, and can effectively isolate the flow channels of the inflow and return flow, so that the inflow and return flow form independent flow channels.

Please continue to refer to FIG. 2, and in combination with FIG. 3 and FIG. 4, the first adapter device 230 includes an adapter 231, and the adapter 231 is used to make the first inlet pipe 110 and the second inlet pipe 210 form fluid communication, so that The fluid flowing in the X direction in the first inlet pipe 110 can flow into the second inlet pipe 210 and flow in the Y direction. As shown in FIG. 4 , the adapter 231 is provided with a first matching hole 232 and a second matching hole 233 forming fluid communication. Wherein, the first matching hole 232 extends along the first direction (X direction) for accommodating the first inlet pipe 110; the second matching hole 233 is configured along an included angle (for example, 90°) Or a stepped hole extending in the second direction (Y direction) slightly greater than 90°), the second matching hole 233 is used to accommodate the second inlet pipe 210 .

Please combine Figure 3 and Figure 4, the second inlet pipe 210 has a mating end surface 211, and the mating end surface 211 abuts against the upper step surface 234 in the second mating hole 233, thereby indicating that the second inlet pipe 210 and the adapter 231 are installed in place.

The adapter 231 is configured as a substantially L-shaped structure, as shown in FIG. 4 , the part extending along the X direction may be configured with a second tapered outer wall 235 to facilitate processing and reduce weight. The part of the adapter 231 extending along the Y direction can be configured to include a positioning platform 236 and a first tapered outer wall 237 extending on the positioning platform 236, wherein the positioning platform 236 can indicate that the adapter 231 and the three-way adapter described below 241 is installed in place, the first tapered outer wall 237 is beneficial to guide the adapter 231 to be inserted into the tee adapter 241, and has the effect of reducing weight.

3 and 5, the second adapter device 240 includes a three-way adapter 241, the three-way adapter 241 is used to seal the connection with the adapter 231, and make the first return pipe 120 and the second return pipe 220 form a fluid communicated, so that the fluid flowing in the Y direction in the second return pipe 220 can flow back into the first return pipe 120 and flow in the X direction.

Specifically, a third matching hole 242 and a fourth matching hole 243 are disposed in the tee adapter 241 . The third matching hole 242 extends along the X direction for receiving the first return pipe 120 . The fourth matching hole 243 is configured as a stepped hole passing through the tee adapter 241 in the Y direction. The fourth matching hole 243 is used to accommodate the second return pipe 220, and the through end surface 221 of the second return pipe 220 is connected to the fourth matching hole. The lower step surface 244 in 243 abuts against, thereby indicating that the second return pipe 220 and the three-way adapter 241 are installed in place.

Wherein, the third matching hole 242 , the fourth matching hole 243 , the second matching hole 233 and the first matching hole 232 are in fluid communication.

As mentioned above, the end (upper end) of the three-way adapter 241 abuts against the positioning table 236 of the adapter 231, thereby indicating that the two are installed in place; at the same time, the fourth matching hole 243 runs through the three-way adapter in the Y direction. The upper side of the joint 241 accommodates the first tapered outer wall 237 of the adapter 231 , so that the three-way adapter 241 and the adapter 231 form a sealed connection on the upper side of the fourth matching hole 243 . Therefore, during backflow (please refer to FIG. 3 and FIG. 6 ), the fluid flows in the channel formed by the inner wall of the second return pipe 220 and the outer wall of the second inlet pipe 210, and flows into the fourth matching hole 243. The sealing effect between the joint 231 and the three-way adapter 241 , so the fluid can only flow into the third matching hole 242 and enter the first return pipe 120 without entering the first matching hole 232 of the adapter 231 .

Therefore, through the cooperative connection between the three-way adapter 241 and the adapter 231, the split-type first inlet pipe 110 and the first return pipe 120 arranged side by side in the first transmission unit 100 can be connected to the second transmission unit respectively. The second inlet pipe 210 and the second return pipe 220 nested in each other in 200 can be connected in one-to-one correspondence, so that both the inflow and the return flow can change directions, thereby reducing the size of the non-vacuum fluid transfer device in the length direction , and its structure is more convenient for puncture and positioning.

Please continue to refer to FIG. 2 , the first transmission unit 100 further includes a thermal insulation part 130 and a flexible reinforcing part 140 . Wherein, the heat insulating part 130 is located in the outer casing 150 and covers the outer walls of the first inlet pipe 110 and the first return pipe 120 . The non-vacuum fluid transmission device of the present invention does not use vacuum insulation, but provides a heat insulation part 130 to keep the first transmission unit 100 at normal temperature. More specifically, the heat insulating part 130 may be a heat insulating material, such as an airgel material, in the outer sleeve 150 and coated on the outer walls of the first inlet pipe 110 and the first return pipe 120 .

The flexible reinforcing part 140 is disposed between the heat insulating part 130 and the inner wall of the outer casing 150 for supporting the first inlet pipe 110 and the first return pipe 120 . As shown in FIG. 2 , the flexible reinforcing part 140 extends in a helical manner along the axial direction of the outer sleeve 150 so as to provide support in the entire axial direction.

Please continue to refer to FIG. 2 , the second transmission unit 200 further includes a handle assembly 270 and a first quick connection device 260 . The handle assembly 270 is sealingly connected with the first quick connection device 260 and the outer sleeve 150 respectively. The handle assembly 270 houses the first adapter device 230 and the second adapter device 240 .

As shown in FIG. 2 , for the purpose of reducing weight, the wall thickness of the handle assembly 270 is set relatively thin, so the space between its inner wall and the first adapter device 230 and the second adapter device 240 is relatively large. These spaces can be filled with airgel material for stability. The first quick connection device 260 accommodates the second inlet pipe 210 and the second return pipe 220, and the space between the inner wall of the first quick connection device 260 and the outer wall of the second return pipe 220 may also be filled with an airgel material to play a stable role.

The first quick connection device 260 and the second quick connection device 301 of the ablation needle 300 form a quick insertion structure, thereby facilitating the disassembly and installation of the non-vacuum fluid transfer device and the ablation needle 300 .

As shown in FIG. 2 , the outer casing 150 may be a flexible hose, and the space between it and the heat insulating part 130 and the flexible reinforcing part 140 may be filled with an airgel material. The space between the handle assembly 270 and the first adapter 230 and the second adapter 240 is also filled with airgel material, so the angle between the first transmission unit 100 and the second transmission unit 200 can be slightly increased. Larger or smaller, for example, the first transport unit 100 is slightly inclined upward or downward, so that it is convenient for the operator to adjust.

As shown in Fig. 1, according to the second aspect of the present invention, the present invention provides an ablation needle system, which includes the above-mentioned non-vacuum fluid transmission device, and also includes an ablation needle 300, and the ablation needle 300 and the second transmission The unit 200 is detachably connected.

As shown in FIG. 7 , the ablation needle 300 includes a sealed vacuum jacket 302 and an inlet-reflux component 310 penetrating through the sealed vacuum jacket 302 and forming a vacuum connection therewith. The ablation needle 300 extends along the Y direction as a whole, so after it is connected with the non-vacuum fluid transmission device, it forms an ablation needle system with a corner structure as a whole. The part of the ablation needle system in the Y direction performs the puncture operation, and the part in the X direction can be held by the operator, so the ablation needle system with the corner structure is easier to operate.

As shown in FIG. 8 , the inlet and return assembly 310 includes an inlet core tube 317 in fluid communication with the second inlet tube 210 and an inner tube 313 sleeved on the outside of the inlet core tube 317. The inner tube 313 is connected to the second return tube. 220 is in fluid communication. The cold and hot fluids in the flow-in and return assembly 310 flow in the flow-in core tube 317. In order to improve the safety of the operation and ensure the treatment temperature of the working medium, an outer tube 314 is sheathed outside the inner tube 313. Between the two The space is a vacuum space.

In order to obtain an ablation needle as thin as possible (for example, a 1.7mm ultra-fine ablation needle, where 1.7mm refers to the outer diameter of the inlet and return assembly 310), under the premise of satisfying the therapeutic effect, a thin-walled tubing is generally selected, while sacrificing Leave a certain vacuum space. This will lead to the fact that during the treatment process, the temperature of the inner tube 313 will become extremely low or high due to the flow of cold and hot fluids, while the outer tube 314 is always kept at normal temperature due to the existence of the vacuum space, so The large temperature difference between the outer tube 314 and the inner tube 313 will cause the inner tube 313 to bear the stress of thermal expansion and cold contraction. Since the two ends of the inlet and return assembly 310 are fixed by welding, the stress of thermal expansion and contraction will cause the inner tube 313 and its connecting end pipeline to be pulled or compressed, and the force may cause the inner tube 313 to deform. Cause the weld to be subjected to certain stress.

Therefore, in order to avoid welding failure due to stress on the weld seam, as shown in FIGS. 8 and 9 , at least a part of the inner tube 313 is provided with a buffer device 316 . The stress caused by thermal expansion and contraction can be effectively absorbed by providing a buffer device 316 capable of withstanding certain tensile and compressive deformations.

Preferably, the buffer device 316 is a bellows, such as a metal bellows, a spiral bellows and the like.

Both the outer wall of the inner tube 313 and the inner wall of the outer tube 314 are attached with a thin film getter. Specifically, the outer wall of the inner tube 313 and the inner wall of the outer tube 314 can be coated with a layer of extremely thin film getters respectively by means of vacuum coating, and the film getters during the process of degassing the materials in the vacuum chamber. The agent can be activated, and after the degassing is completed, the vacuum sealing operation can be carried out.

Please combine Figure 8 and Figure 10, the ablation needle 300 also includes a needle tip 311 and an energy exchange tube 312 that are integrated or split. Way to seal the connection.

The energy exchange tube 312 is directly or indirectly connected to the outer tube 314 . The energy exchange tube 312 shown in FIG. 10 is indirectly connected to the outer tube 314 , that is, the two are connected through a connecting tube 318 . After connection, the needle tip 311 , the energy exchange tube 312 , the connecting tube 318 and the outer tube 314 have the same outer diameter.

As shown in FIG. 10 and FIG. 11 , the energy exchange tube 312 includes a heat insulation cavity 3121 and a heat exchange cavity 3122 that are physically separated along the axial direction. Wherein, the heat insulation cavity 3121 may be filled with heat insulation materials, such as airgel materials (particles). In addition, the inner wall of the heat insulation chamber 3121 may also be attached with a thin film getter or a normal temperature getter. In other words, by filling the heat insulation cavity 3121 with heat insulating material, only the part where the heat exchange cavity 3122 is located in the energy exchange tube 312 can perform heat exchange, while the part where the heat insulation cavity 3121 is located will not perform heat exchange, so the energy exchange tube 312 Can meet special clinical requirements.

As shown in Figure 10, the inlet core tube 317 extends into the heat exchange cavity 3122, and due to the existence of the heat insulation cavity 3121, the axes of the heat exchange cavity 3122 and the inlet core tube 317 are not collinear, so the inlet core tube 317 It needs to be slightly bent to extend into the heat exchange cavity 3122 .

The heat exchange cavity 3122 forms fluid communication with the inlet core tube 317 and the inner tube 313 respectively, so that the fluid flowing out from the inlet core tube 317 turns back in the heat exchange cavity 3122 and flows back to between the inlet core tube 317 and the inner tube 313 . Wherein, the inlet core pipe 317 is in fluid communication with the above-mentioned second inlet pipe 210 and the first inlet pipe 110, that is, the fluid flows from the first inlet pipe 110 through the second inlet pipe 210 and then enters the inlet flow. The core pipe 317 and the part of the inflow core pipe 317 located in the heat exchange cavity 3122 can conduct heat exchange.

After the heat exchange is completed, the fluid turns back in the heat exchange chamber 3122 and flows back between the inlet core tube 317 and the inner tube 313. A return path is formed between the inner wall of the inner tube 313 and the outer wall of the inlet core tube 317, and the fluid The return flow from the return passage is sequentially sent to the second return pipe 220 and the first return pipe 120 .

Optionally, as shown in FIG. 10 , the end of the inlet core pipe 317 is an open end, so the fluid therein can flow out to the heat exchange cavity 3122 from the end, and the corresponding end in the heat exchange cavity 3122 is is a closed end, so the fluid in the heat exchange chamber 3122 can turn back therein.

Optionally, one or more forming holes (not shown) may be provided on the side wall of the inlet core pipe 317 , and the fluid may also flow out from the forming holes into the heat exchange cavity 3122 .

Optionally, the inlet core pipe 317 can also be configured with an open end and one or more forming holes (not shown) on the side wall.

Please refer to FIG. 7 , FIG. 8 and FIG. 12 , the ablation needle 300 further includes a conversion sleeve 315 and a second quick connection device 301 sealingly connected with the conversion sleeve 315 . As shown in FIG. 12 , the conversion sleeve 315 includes a sealed chamber 3151 and a guide tube 3152 passing through the sealed chamber 3151 , and the inlet core tube 317 runs through the guide tube 3152 . The second inlet pipe 210 runs through the second quick connection device 301 and extends into the sealed chamber 3151 of the conversion sleeve 315 .

The second inlet tube 210 accommodates part of the guide tube 3152 and thus part of the inlet core tube 317 so as to be in fluid communication with the inlet core tube 317 to form an inlet flow passage.

The second inlet pipe 210 and the second return pipe 220 run through the second quick connection device 301 and extend into the sealed chamber 3151 of the conversion sleeve 315 . More specifically, please refer to FIG. 12 and FIG. 16 , the inlet core tube 317 runs through the guide tube 3152 and is sealingly connected with the guide tube 3152 at the end side, and the inlet core tube 317 and the guide tube 3152 extend into the second inlet tube 210, so that the inlet core tube 317 is in fluid communication with the second inlet tube 210, therefore, the first inlet tube 110, the second inlet tube 210 and the inlet core tube 317 form an inlet passage for flow to be carried out heat exchange fluid.

As shown in Figure 12 and Figure 13, the opposite end of the conversion sleeve 315 to the sealed chamber 3151 is also provided with a groove 3154 in fluid communication with the sealed chamber 3151, specifically, the groove 3154 communicates with the sealed chamber through the drainage hole 3155 3151 in fluid communication. As shown in Figure 12, the bottom of the groove 3154 is provided with a drainage hole 3155 extending toward the sealing chamber 3151; the drainage hole 3155 is located in the circumferential direction of the guide tube 3152, and the drainage hole 3155 is connected to the groove 3154 and the sealing chamber respectively. Chamber 3151 is in fluid communication. And in the axial direction (Y-axis direction), the sum of the depth of the groove 3154 and the depth of the drainage hole 3155 is the axial wall thickness of the sealing chamber 3151 .

The inner tube 313 is disposed in the groove 3154 , and the end of the inner tube 313 abuts against the inner wall of the groove 3154 , that is, the inner tube 313 terminates in the groove 3154 . Therefore, the groove 3154, the drainage hole 3155, and the sealed chamber 3151 form a return flow path. Furthermore, please refer to FIG. 2 , FIG. 18 and FIG. 21 , the first quick-connect device 260 has a wedge-shaped end face 263 , and the wedge-shaped end face 263 is conducive to guiding the first quick-connect device 260 for inserting into the sealing chamber 3151 of the conversion sleeve 315 . The wedge-shaped end surface 263 is provided with a return hole 262 extending axially along the first quick connecting device 260. When the first quick connecting device 260 is inserted into the sealing chamber 3151 and sealed with the sealing chamber 3151, the first quick connecting device There is a certain distance between the wedge-shaped end surface 263 of 260 and the inner bottom wall of the sealed chamber 3151, in other words, the first quick connection device 260 does not completely occupy the sealed chamber 3151, so the fluid flowing into the sealed chamber 3151 can flow to the return flow In the hole 262 , the return hole 262 is in fluid communication with the sealed chamber 3151 . Further, the return hole 262 is in fluid communication with the return path formed by the inner wall of the second return pipe 220 and the outer wall of the second inlet pipe 210 .

That is to say, when the end of the inner tube 313 abuts against the inner wall of the groove 3154, the return path formed between the inner wall of the inner tube 313 and the outer wall of the inlet core tube 317 is the first section of the return path; the groove 3154, The backflow path formed by the drainage hole 3155 and the sealed chamber 3151 is the second backflow path; the backflow hole 262, the inner wall of the second backflow pipe 220 and the outer wall of the second inlet pipe 210 form the third backflow path, and the first backflow pipe 120 is formed, and the above-mentioned four segments of the return path are fluidly connected to jointly form the return path. The return passage is used to flow the fluid after heat exchange, and the fluid can return to the end of the first return pipe 120 according to the above return passage for further processing, such as recovery or discharge.

Please refer to Fig. 12 and Fig. 16, the distance A (that is, the length in the Y direction) between the inner wall of the sealing chamber 3151 and the seal 306 in the second quick connection device 301 in its axial direction and the low temperature resistance of the seal 306 relevant. More specifically, the axial distance A between the inner wall of the sealing chamber 3151 and the seal 306 in the second quick connection device 301 (ie, the length in the Y direction) is negatively related to the low temperature resistance of the seal 306 . For example, the higher the low temperature resistance of the sealing member 306, the smaller the distance A is. Therefore, if the sealing member 306 is made of a material with better low temperature resistance, such as PTFE (polytetrafluoroethylene), the distance A can be relatively shortened; if the sealing member 306 is made of ordinary rubber material, the distance A can be relatively increased , to meet the requirements of sealing reliability.

In addition, the sealing member 306 can also be made of materials such as nitrile rubber, fluororubber, silicon rubber or polyurethane, and the above-mentioned distance A can be adjusted according to the properties of these different materials.

Wherein, the seal 306 is used to form a seal between the second quick connection device 301 and the first quick connection device 260 of the non-vacuum fluid transfer device. Therefore, an alternative to the sealing member 306 being located on the inner wall of the second quick connecting device 301 is that the sealing member 306 is located on the outer wall of the first quick connecting device 260 , which can also ensure the sealing of the two.

Please continue to refer to FIG. 7, and in conjunction with FIG. 14, FIG. 15 and FIG. 16, the ablation needle 300 also includes a sealed vacuum jacket 302, and for the purpose of weight reduction, the two sides of the sealed vacuum jacket 302 are respectively provided with first cavities 3021 and the second cavity 3022 , the central part of the partition between the first cavity 3021 and the second cavity 3022 is provided with an inflow and return flow and sealing hole 3024 , and the inflow and return component 310 passes through the inflow and return flow and sealing hole 3024 . Part of the space in the flow-in and return and sealing hole 3024 is occupied by the flow-in and return assembly 310 , and the other part of the space can be used for the sealing port for vacuuming. In other words, the inlet-reflux and sealing hole 3024 is not only used for accommodating the inlet-reflux assembly 310 , but also used as a sealing port for vacuuming.

In addition to sealing through the inlet-reflux and sealing hole 3024, at least four sealing ports 3023 distributed along the circumference of the inlet-reflux and sealing hole 3024 on the separator can be used to seal the ablation needle 300 through the sealing port 3023. Vacuum operation is performed to ensure the required vacuum environment in the ablation needle 300 .

As shown in Fig. 9, Fig. 14 and Fig. 16, the outer tube 314 terminates in the second chamber 3022, and a getter 305 is provided at the end of the outer pipe 314 in the second chamber 3022 to maintain the air in the first chamber 3021. Vacuum environment. Preferably, the getter 305 is a normal temperature getter, such as PdO+molecular sieve, activated carbon or heat insulating material, which does not require high temperature activation, but only needs to be degassed, so the process is simple and easy to operate.

As shown in FIG. 12 , FIG. 14 and FIG. 16 , one side of the sealed vacuum jacket 302 is sealed with a protective sleeve 303 . Specifically, a mating table 3025 is provided on the outer wall of the first chamber 3021 , and after being positioned with the mating groove 3031 on the protective case 303 , the sealed vacuum jacket 302 and the protective case 303 can be hermetically connected, such as welded. The other side of the protective sleeve 303 is closely matched with the inlet and outlet assembly 310 (specifically, the outer tube 314 ). The inlet-reflux assembly 310 passes through the protective sheath 303 and the sealed vacuum jacket 302 in turn, and vacuumizes and seals through the above-mentioned sealing ports to ensure the required vacuum environment in the ablation needle 300 .

The protective sleeve 303 can protect the inlet and outlet assembly 310 (specifically, the outer tube 314 ) to a certain extent. In addition, the protective cover 303 is constructed as a cone-shaped structure as a whole, which is beautiful and lightweight.

The other side of the sealed vacuum jacket 302 is hermetically connected with the conversion sleeve 315 . Specifically, the outer wall of the conversion sleeve 315 is provided with a connecting boss 3153 (as shown in FIG. 12 ), the side end of the sealed vacuum jacket 302 abuts against one side of the connecting boss 3153, and the other side of the second quick connecting device 301 One side abuts against the other side of the connecting boss 3153 to ensure that it is installed in place, so that the sealed vacuum jacket 302 , the conversion sleeve 315 and the second quick connection device 301 can be sealed and connected. As shown in FIG. 10 , the sealed vacuum jacket 302 , the conversion sleeve 315 and the second quick connection device 301 have the same outer diameter after being sealed and connected.

Quick assembly and disassembly can be realized between the second quick connection device 301 and the first quick connection device 260 through snap connection.

In one embodiment, as shown in FIG. 1 , FIG. 2 , FIG. 16 , FIG. 17 , FIG. 19 and FIG. 20 , the second quick connection device 301 is connected to the first quick connection device 260 through sliding engagement.

Optionally, please refer to FIG. 1 and FIG. 16 , the second quick connection device 301 includes a first flange 3011 , in order to facilitate placement of the sealing member 306 , the diameter of the first flange 3011 is slightly larger than the diameter of the sealing vacuum jacket 302 .

Optionally, please refer to FIG. 1 and FIG. 17, the second quick connection device 301 includes a second flange 3013 whose diameter is approximately the same as that of the sealing vacuum jacket 302, that is, the second quick connection device 301 and the sealing vacuum jacket The vacuum sleeve 302 and the conversion sleeve 315 have a consistent outer diameter, so that the ablation needle 300 maintains a consistent overall dimension.

Therefore, it is further understandable that the second quick connection device 301 also includes an elastic movable sleeve 304 for realizing quick connection, and the wall thickness of the elastic movable sleeve 304 can also be set thinner, as shown in FIG. 17 . The wall thickness of the barrel 304 is significantly smaller than that of the elastic moving sleeve 304 shown in FIG. 16 , so that the overall dimensions of the ablation needle 300 tend to be consistent.

Please refer to Fig. 1, Fig. 2, Fig. 16, Fig. 19, Fig. 20 and Fig. 21, the elastic moving sleeve 304 is sleeved on the outside of the first flange 3011 (or the second flange 3013 shown in Fig. 17), both A space for accommodating the elastic member 3041 is formed therebetween. One end of the elastic member 3041 abuts against the protruding end of the first flange 3011 , and the other end of the elastic member 3041 abuts against the top block 3042 of the elastic moving sleeve 304 . Therefore, when the elastic moving sleeve 304 moves in the negative direction of the Y axis, the elastic member 3041 is compressed (at this time, the second quick connecting device 301 can be unlocked from the first quick connecting device 260); 3041 moves along the positive direction of the Y axis under the action of the restoring force of 3041 (at this time, the second quick connection device 301 can be locked with the first quick connection device 260).

The first flange 3011 is provided with a ball hole 3014 , and the ball hole 3014 is configured as a tapered hole whose diameter is tapered along the direction from the outer wall to the inner wall of the first flange 3011 . A ball 3012 is disposed in the ball hole 3014 (as shown in FIG. 19 ). The ball 3012 is in the ball hole 3014, and the top block 3042 of the elastic moving sleeve 304 is arranged at a position corresponding to the ball hole 3014, so that a part of the ball 3012 is exposed from the inside of the ball hole 3014 (as shown in FIG. 20 ). Since the ball hole 3014 is a tapered hole, the ball 3012 can roll freely in the ball hole 3014 without falling out.

The outer wall of the first quick connecting device 260 is provided with a fitting groove 261 (please refer to FIG. 2 and FIG. 21 ), and the fitting groove 261 has an inclined wall 2611 (as shown in FIG. 21 ), so that the fitting groove 261 presents an outer large , Small structural form inside. After the second quick connection device 301 is connected with the first quick connection device 260 , the part of the ball 3012 exposed outside the ball hole 3014 enters the fitting groove 261 . In other words, the ball 3012 is stuck in the ball hole 3014 and the fitting groove 261 .

Further, when the elastic moving sleeve 304 moves along the negative direction of the Y axis, the top block 3042 of the elastic moving sleeve 304 and the ball hole 3014 are staggered, so that the ball 3012 can be pushed to the ball hole by the inclined wall 2611 of the fitting groove 261 In 3014, the second quick connection device 301 and the first quick connection device 260 are unlocked, and the two can be separated from each other. The second quick connection device 301 is unlocked from the first quick connection device 260 , so the non-vacuum fluid transfer device can be unlocked from the ablation needle 300 .

Conversely, when the elastic moving sleeve 304 moves along the positive direction of the Y-axis under the action of the restoring force of the elastic member 3041, the top block 3042 of the elastic moving sleeve 304 corresponds to the ball hole 3014, so that the ball 3012 moves from the ball hole 3014 The inner side of the non-vacuum fluid delivery device can be locked with the ablation needle 300 by exposing the inner side of the second quick connection device 301 and the first quick connection device 260 and entering into the matching groove 261 . Thus, the second quick connection device 301 and the first quick connection device 260 can be quickly assembled.

It can be understood that a plurality of balls 3012 can be arranged along the circumference of the first flange 3011 . As shown in FIG. 19 and FIG. 20 , four balls 3012 are arranged at equal intervals along the circumference of the first flange 3011 .

In another embodiment, as shown in FIG. 22 , FIG. 23 , FIG. 24 and FIG. 25 , the second quick connection device 301 is connected to the first quick connection device 260 through sliding elastic engagement. In this embodiment, the connection manner between the second quick connection device 301 and the first quick connection device 260 will be mainly described, and other components may refer to other embodiments described herein.

As shown in FIG. 22 and FIG. 23 , the second quick connection device 301 includes a connecting sleeve 308 and an elastic engaging element 307 disposed on the connecting sleeve 308 . As shown in Figure 24, the connecting sleeve 308 is provided with a connecting hole 3081, and the elastic engaging element 307 is arranged in the connecting hole 3081, as shown in Figure 24 and Figure 25, the elastic engaging element 307 includes a plunger 3073, a spring 3072 and Top beads 3071. The plunger 3073 can be fixedly connected with the connecting hole 3081 through threaded connection.

A tapered hole is arranged in the plunger 3073, and the top ball 3071 and the spring 3072 are arranged in the tapered hole. Under the pushing force of the spring 3072 , a part of the top ball 3071 is exposed outside the tapered hole of the plunger 3073 . Because the inner diameter of the tapered hole is small, the top ball 3071 can rotate freely therein without falling out.

The first quick connection device 260 is similar to the previous embodiment, and it is provided with a matching groove 261. After the second quick connection device 301 is connected to the first quick connection device 260, the top ball 3071 is exposed outside the tapered hole of the plunger 3073. A part is snapped into the fitting groove 261 , that is, the top ball 3071 is stuck in the plunger 3073 and the fitting groove 261 .

When the first quick connection device 260 is pulled along the positive direction of the Y axis, the fitting groove 261 and the top bead 3071 are dislocated, and the top bead 3071 is pushed by the inclined wall 2611 of the fitting groove 261, thereby compressing the spring 3072, and the top bead 3071 retracts into the plunger 3073 In the tapered hole, the second quick connection device 301 is unlocked from the first quick connection device 260 , and the non-vacuum fluid transfer device can be separated from the ablation needle 300 .

Conversely, when the Y-axis negative direction pushes the first quick connection device 260 to insert it into the second quick connection device 301, the matching groove 261 corresponds to the top bead 3071, and the top bead 3071 is driven by the taper of the plunger 3073 under the push of the spring 3072. The second quick connection device 301 is locked with the first quick connection device 260 and the non-vacuum fluid transmission device can be connected with the ablation needle 300 .

In addition, as shown in FIG. 24 , a sealing groove 3082 is also provided in the connecting sleeve 308 , and the sealing groove 3082 is used for accommodating the sealing member 306 so as to form a seal between the second quick connecting device 301 and the first quick connecting device 260 .

The connection sleeve 308 is also provided with a recessed part 3083, which is convenient for holding during operation.

On the basis of FIG. 22 , FIG. 23 , FIG. 24 and FIG. 25 , another snap-fit method between the second quick-connection device 301 and the first quick-connection device 260 can also be conceived, that is, an elastic snap-fit connection. For example, a push switch can be configured on the elastic engaging element 307, and when a force is applied on the push switch, the elastic engaging element 307 is disengaged from the matching groove 261, so that the second quick connecting device 301 and the first quick connecting device 260 can be unlocked. .

The ablation needle 300 has various diameters, and the assembly resistance of the ablation needle 300 with different diameters and the non-vacuum fluid transmission device is different. Generally speaking, the assembly resistance of the ablation needle 300 with a thicker diameter is small because the flow diameter of the cold and hot fluid becomes larger; while the assembly resistance of the ablation needle 300 with a thinner diameter is large because the circulation of the cold and hot fluid The pipe diameter becomes smaller. In order to make the non-vacuum fluid transfer device match ablation needles 300 of different diameters, the cooling speed and performance can be ensured by adjusting the air-tight fit gap between the ablation needle 300 and the second transfer unit 200 of the non-vacuum fluid transfer device.

Since the flow resistance of the ablation needles 300 of the same diameter is consistent, adjustments are made for the ablation needles 300 of different diameters.

Please refer to FIG. 1 , FIG. 12 and FIG. 17 , when the non-vacuum fluid transmission device is matched with the ablation needle 300 , the resistance of different ablation needles can be matched through the matching gap. The distance L between the end of the inlet core tube 317 and the inner wall of the sealed chamber 3151 of the transition sleeve 315 is a fixed value, as shown in FIG. 12 and FIG. 17 . The depth of the inlet core tube 317 (and the guide tube 3152 ) extending into the second inlet tube 210 (or can be regarded as the depth extending into the second return tube 220 ) is the matched length L1.

The flow resistance between the inlet core tube 317 (and the guide tube 3152 ) and the second inlet tube 210 and the above-mentioned matching length L1 and the flow resistance between the inlet core tube 317 (and the guide tube 3152 ) and the second inlet tube 210 Fit clearance related. Generally, the fitting resistance is required to be greater than the resistance of the front end of the ablation needle 300 to prevent cold and hot fluids from directly flowing back through the fitting gap to the second return tube 220 of the non-vacuum fluid delivery device instead of the return path of the ablation needle 300 . For example, a larger fitting length L1 and a larger fitting gap, or a shorter fitting length L1 and a smaller fitting gap are possible.

Please refer to FIG. 1 , FIG. 3 and FIG. 18 , the inner diameter of the non-vacuum fluid transfer device is C1, which is the inner diameter of the second inlet pipe 210 (as shown in FIG. 3 and FIG. 17 ), which is a fixed value. The diameter of the inner hole of the ablation needle 300 is C, which is the outer diameter of the guide tube 3152 (as shown in FIGS. 12 and 17 ). Different matching requirements can be met by adjusting the value of C. For example, for the ablation needle 300 with a thinner diameter, a relatively small gap can be selected; for the ablation needle 300 with a thicker diameter, a relatively large gap can be selected.

In addition, by selecting an appropriate fitting gap, the pre-vaporized fluid can flow out directly from the fitting gap, which is beneficial for the fluid (liquid nitrogen) to reach the front end of the ablation needle 300 quickly, thereby improving the cooling speed. And the vaporized fluid flowing out from the matching gap can flow out through the second return pipe 220 of the non-vacuum fluid transmission device, so it can also pre-cool the second return pipe 220, thereby reducing the backflow resistance in the later stage, thereby further improving cooling speed.

According to a third aspect of the present invention, the present invention provides a fluid channel, and more specifically, relates to a fluid channel of the above-mentioned ablation needle system.

The fluid channel of the present invention includes an inflow path and a return path; wherein, the inflow path includes a first section of the inflow path and a second section of the inflow path, and the flow direction of the fluid in the first section of the inflow path is redirected to flow into the second section. In the second section of the inflow path; the return passage includes a third section of the return path 33 and a fourth section of the return path 34, and the flow direction of the fluid in the third section of the backflow path 33 is redirected to flow into the fourth section of the backflow path 34; wherein, The flow direction of the fluid in the first segment of the inflow path is opposite to the flow direction of the fluid in the fourth segment of the return path 34 , and the flow direction of the fluid in the second segment of the inflow path is opposite to the flow direction of the fluid in the third segment of the return path 33 .

In one embodiment, the inflow path further includes a third section of the inflow path, wherein the first section of the inflow path, the second section of the inflow path and the third section of the inflow path are controlled by the above-mentioned first transmission unit 100 , the second transmission unit 200 , the ablation needle 300 , the first adapter device 230 and the second adapter device 240 .

Specifically, the first delivery unit 100 includes a first inlet tube 110 , the second delivery unit 200 includes a second inlet tube 210 , and the ablation needle 300 includes an inlet core tube 317 . The inflow path includes a first section of the inflow path, a second section of the inflow path and a third section of the inflow path.

Wherein, the first inflow path is defined by the first inflow pipe 110 (inner cavity/inner wall of the first inflow pipe 110) of the first transmission unit 100, and the second inflow path is defined by the first inflow path of the second transmission unit 200. The second inflow tube 210 (inner lumen/inner wall of the second inflow tube 210 ) is defined, and the third inflow path is defined by the inflow core tube 317 of the ablation needle 300 (inner lumen/inner wall of the inflow core tube 317 ).

The axes of the first inlet pipe 110 and the second inlet pipe 210 are substantially perpendicular, and the first inlet pipe 110 is in fluid communication with the second inlet pipe 210 through the first adapter device 230 .

Please refer to FIG. 2, and in combination with FIG. 3 and FIG. 4, the first adapter device 230 includes an adapter 231, and the adapter 231 is used to establish fluid communication between the first inlet pipe 110 and the second inlet pipe 210, so that the first The fluid flowing in the X direction in the first inlet pipe 110 can flow into the second inlet pipe 210 and flow in the Y direction. As shown in FIG. 4 , the adapter 231 is provided with a first matching hole 232 and a second matching hole 233 forming fluid communication. Wherein, the first matching hole 232 extends along the first direction (X direction) for accommodating the first inlet pipe 110; the second matching hole 233 is configured along an included angle (for example, 90°) ) is a stepped hole extending in the second direction (Y direction), and the second matching hole 233 is used to accommodate the second inlet pipe 210 .

The first fitting hole 232 is in fluid communication with the second fitting hole 233 , so that the first inlet pipe 110 and the second inlet pipe 210 are in fluid communication.

The second intake tube 210 is in fluid communication with the intake core tube 317 . Specifically, referring to FIG. 8 , FIG. 12 , FIG. 13 and FIG. 18 , the ablation needle 300 further includes a conversion sleeve 315 and a second quick connection device 301 sealingly connected with the conversion sleeve 315 . As shown in FIG. 12 , the conversion sleeve 315 includes a sealed chamber 3151 and a guide tube 3152 passing through the sealed chamber 3151 , and the inlet core tube 317 runs through the guide tube 3152 . The second inlet pipe 210 runs through the second quick connection device 301 and extends into the sealed chamber 3151 of the conversion sleeve 315 .

The second intake tube 210 receives a portion of the guide tube 3152 and thus a portion of the intake core tube 317 so as to be in fluid communication with the intake core tube 317 .

The second inlet pipe 210 and the second return pipe 220 run through the second quick connection device 301 and extend into the sealed chamber 3151 of the conversion sleeve 315 . More specifically, please refer to FIG. 12 and FIG. 16 , the inlet core tube 317 runs through the guide tube 3152 and is sealingly connected with the guide tube 3152 at the end side, and the inlet core tube 317 and the guide tube 3152 extend into the second inlet tube 210, so that the inlet core pipe 317 is in fluid communication with the second inlet pipe 210, therefore, the first inlet pipe 110, the second inlet pipe 210 and the inlet core pipe 317 form a fluid for flowing heat exchange Thus, the fluid can flow from the negative direction of the X-axis to the negative direction of the Y-axis shown in FIG. 1 , until reaching the needle tip 311 of the ablation needle 300 .

Further, the return path further includes a first section of return path 31 and a second section of return path 32 . The first backflow path 31 , the second backflow path 32 , the third backflow path 33 and the fourth backflow path 34 are composed of the above-mentioned first transmission unit 100 , second transmission unit 200 , ablation needle 300 , A transition device 230 and a second transition device 240 are defined.

The ablation needle 300 also includes an inlet-reflux assembly 310, the inlet-reflux assembly 310 includes an inlet core tube 317 in fluid communication with the second inlet tube 210 and an inner tube 313 sheathed on the outside of the inlet core tube 317, the inner tube 313 and The second return pipe 220 is in fluid communication. In order to improve the safety of the operation and ensure the treatment temperature of the working medium, an outer tube 314 is sheathed outside the inner tube 313, and there is a vacuum space between the two.

The first return path 31 is jointly defined by the inner wall of the inner tube 313 and the outer wall of the inlet core tube 317 (please refer to FIG. 8 , FIG. 9 and FIG. 10 ).

As shown in Figure 12 and Figure 13, the opposite end of the conversion sleeve 315 to the sealed chamber 3151 is also provided with a groove 3154 in fluid communication with the sealed chamber 3151, specifically, the groove 3154 communicates with the sealed chamber through the drainage hole 3155 3151 in fluid communication. As shown in Figure 12, the bottom of the groove 3154 is provided with a drainage hole 3155 extending toward the sealing chamber 3151; the drainage hole 3155 is located in the circumferential direction of the guide tube 3152, and the drainage hole 3155 is connected to the groove 3154 and the sealing chamber respectively. Chamber 3151 is in fluid communication. And in the axial direction (Y-axis direction), the sum of the depth of the groove 3154 and the depth of the drainage hole 3155 is the axial wall thickness of the sealing chamber 3151 .

The inner tube 313 is disposed in the groove 3154 , and the end of the inner tube 313 abuts against the inner wall of the groove 3154 , that is, the inner tube 313 terminates in the groove 3154 . Therefore, the groove 3154 , the drainage hole 3155 and the sealed chamber 3151 form the second segment of the return path 32 . Please combine Figure 12 and Figure 13, the inner tube 313 extends into the groove 3154, and the end of the inner tube 313 abuts against the inner wall of the groove 3154, while the inlet core tube 317 extends into the guide tube 3152, so that the inner The inner wall of the tube 313 and the outer wall of the inlet core tube 317 jointly define the first segment of the return path 31 to be in fluid communication with the drain hole 3155 , that is, the first segment of the return path 31 is in fluid communication with the second segment of the return path 32 .

The second transmission unit 200 also includes a first quick connection device 260, and the second quick connection device 301 of the ablation needle 300 forms a quick insertion structure. The first quick connecting device 260 has a wedge-shaped end face 263 (please refer to FIG. 2, FIG. 18 and FIG. 21), and the wedge-shaped end face 263 is provided with a return hole 262 extending axially along the first quick connecting device 260. The third section of the return flow path 33 is defined by the return hole 262 , the inner wall of the second return pipe 220 and the outer wall of the second inlet pipe 210 (see FIG. 26 ).

Please combine Fig. 18 and Fig. 26, the first quick connecting device 260 is inserted into the sealing chamber 3151 of the conversion sleeve 315 to be connected with the sealing chamber 3151 in a sealed manner, and the return hole 262 at the end of the first quick connecting device 260 is connected to the sealing chamber 3151 Fluid communication, that is, the second segment of the return path 32 and the third segment of the return path 33 are in fluid communication.

The fourth return path 34 is defined by the first return pipe 120 (as shown in FIG. 2 ), the first return pipe 120 communicates with the second return pipe 220 through the second adapter 240, and the fluid in the second return pipe 220 The flow direction is redirected by the second transition device 240 to return to the first return pipe 120 .

3 and 5, the second adapter device 240 includes a three-way adapter 241, the three-way adapter 241 is used to seal the connection with the adapter 231, and make the first return pipe 120 and the second return pipe 220 form a fluid communicated, so that the fluid flowing in the Y direction in the second return pipe 220 can flow back into the first return pipe 120 and flow in the X direction.

Specifically, a third matching hole 242 and a fourth matching hole 243 are disposed in the tee adapter 241 . The third matching hole 242 extends along the X direction for receiving the first return pipe 120 . The fourth matching hole 243 is configured as a stepped hole passing through the tee adapter 241 in the Y direction. The fourth matching hole 243 is used to accommodate the second return pipe 220, and the through end surface 221 of the second return pipe 220 is connected to the fourth matching hole. The lower step surface 244 in 243 abuts against, thereby indicating that the second return pipe 220 and the three-way adapter 241 are installed in place.

Wherein, the third matching hole 242 , the fourth matching hole 243 , the second matching hole 233 and the first matching hole 232 are in fluid communication, so that the fourth section of the return path 34 defined by the second return pipe 220 and the first return pipe 120 is fluidly connected. communication, that is, the third segment of the return path 33 and the fourth segment of the return path 34 are in fluid communication.

As mentioned above, the end (upper end) of the three-way adapter 241 abuts against the positioning table 236 of the adapter 231, thereby indicating that the two are installed in place; at the same time, the fourth matching hole 243 runs through the three-way adapter in the Y direction. The upper side of the joint 241 accommodates the first tapered outer wall 237 of the adapter 231 , so that the three-way adapter 241 and the adapter 231 form a sealed connection on the upper side of the fourth matching hole 243 . Therefore, during backflow (please refer to FIG. 3 and FIG. 6 ), the fluid flows in the channel formed by the inner wall of the second return pipe 220 and the outer wall of the second inlet pipe 210, and flows into the fourth matching hole 243. The sealing effect between the joint 231 and the three-way adapter 241 , so the fluid can only flow into the third matching hole 242 and enter the first return pipe 120 without entering the first matching hole 232 of the adapter 231 .

Therefore, through the cooperative connection between the three-way adapter 241 and the adapter 231, the split-type first inlet pipe 110 and the first return pipe 120 arranged side by side in the first transmission unit 100 can be connected to the second transmission unit respectively. The second inlet pipe 210 and the second return pipe 220 nested in each other in 200 can be connected in one-to-one correspondence, so that both the inflow and the return flow can change directions, thereby reducing the size of the non-vacuum fluid transfer device in the length direction , and its structure is more convenient for puncture and positioning.

The fluid channel of the present invention is based on the non-vacuum delivery device and the ablation needle system of the present invention, so the specific forms of the various components involved in the fluid channel of the present invention are not described in detail. The fluid channel of the present invention can be combined with various components and their connection methods in the non-vacuum delivery device and/or ablation needle system described in any one or more embodiments/embodiments above without any obstacles.

It should be noted that the arrows shown in the drawings of the present invention indicate the flow direction of the fluid. In addition, the elongated elements (such as the first transmission unit, the second transmission unit, and the ablation needle, etc.) in the drawings of the present invention are shown in broken drawings, so those skilled in the art should be able to understand and understand Undoubtedly, the overall structural form of the non-vacuum fluid transmission device, fluid channel and ablation needle system claimed in the present invention is obtained.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for parts thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (16)

1. The ablation needle system is characterized in that, comprising: A non-vacuum fluid transfer device, which includes a first transfer unit (100) and a second transfer unit (200) communicating with each other, and the second transfer unit (200) includes a second inlet pipe (210) and a second return pipe (220); and An ablation needle (300), which is detachably connected to the second transmission unit (200), the ablation needle (300) includes a sealed vacuum jacket (302) and passes through the sealed vacuum jacket (302) and forming a vacuum-connected inlet and outlet assembly (310); The inflow and return assembly (310) includes an inflow core tube (317) that is in fluid communication with the second inflow tube (210) to form an inflow path, and is sheathed on the outside of the inflow core tube (317). an inner pipe (313), the inner pipe (313) is in fluid communication with the second return pipe (220); Wherein, at least a part of the inner tube (313) is provided with a buffer device (316). 2. The ablation needle system according to claim 1, characterized in that, an outer tube (314) is sheathed on the outside of the inner tube (313), and the inner tube (313) and the outer tube (314) There is a vacuum space in between; Both the outer wall of the inner tube (313) and the inner wall of the outer tube (314) are attached with a film getter. 3. The ablation needle system according to claim 2, characterized in that, the ablation needle (300) further comprises an integral or split needle tip (311) and an energy exchange tube (312), the energy exchange tube (312) is directly or indirectly connected to said outer tube (314). 4. The ablation needle system according to claim 3, characterized in that, the energy exchange tube (312) includes a thermal insulation cavity (3121) and a heat exchange cavity (3122) that are physically separated along its axial direction, and the The inlet core pipe (317) extends into the heat exchange chamber (3122); The heat exchange cavity (3122) is respectively in fluid communication with the inlet core tube (317) and the inner tube (313), so that the fluid flowing out from the inlet core tube (317) Turn back in the cavity (3122) and return to between the inlet core tube (317) and the inner tube (313). 5. The ablation needle system according to claim 4, characterized in that, the axes of the heat exchange cavity (3122) and the inlet core tube (317) are not collinear, so that the inlet core tube (317) ) is bent and extended into the heat exchange chamber (3122), and the part of the inlet core pipe (317) located in the heat exchange chamber (3122) can perform heat exchange. 6. The ablation needle system according to claim 5, characterized in that, the end of the inlet core tube (317) is an open end, and/or One or more forming holes are arranged on the side wall of the inlet core pipe (317); The fluid in the inlet core tube (317) flows out from the end of the inlet core tube (317) or the forming hole to the heat exchange cavity (3122); The end of the heat exchange cavity (3122) corresponding to the inlet core pipe (317) is a closed end, and the fluid in the heat exchange cavity (3122) can turn back therein. 7. The ablation needle system according to any one of claims 1-6, characterized in that, the ablation needle (300) further comprises a conversion sleeve (315) and a seal connected to the conversion sleeve (315) The second quick connection device (301); The conversion sleeve (315) includes a sealed chamber (3151), a guide tube (3152) passing through the sealed chamber (3151), and drainage holes (3155) arranged around the circumference of the guide tube (3152), The drainage hole (3155) is in fluid communication with the sealed chamber (3151), and the inlet core tube (317) runs through the guide tube (3152); The second inlet pipe (210) and the second return pipe (220) run through the second quick connection device (301) and extend into the sealed chamber (3151); Wherein, the second return pipe (220) is in fluid communication with the return path formed by the drainage hole (3155) and the sealed chamber (3151) to form a return path. 8. The ablation needle system according to claim 7, characterized in that, the inner wall of the sealed chamber (3151) and the seal (306) in the second quick connection device (301) are axially aligned. The distance is related to the low temperature resistance of the seal (306); Wherein, the sealing member (306) is used to form a seal between the second quick connection device (301) and the first quick connection device (260) of the non-vacuum fluid transmission device. 9. The ablation needle system according to claim 7, characterized in that, the ablation needle (300) further comprises a sealed vacuum jacket (302); One side of the sealed vacuum jacket (302) is sealed with a protective sleeve (303), and the other side of the protective sleeve (303) is closely matched with the outer tube (314) of the inlet and return assembly (310); The other side of the sealed vacuum jacket (302) is in sealing connection with the conversion sleeve (315). 10. The ablation needle system according to claim 9, characterized in that a first cavity (3021) and a second cavity (3022) are respectively provided on both sides of the sealed vacuum jacket (302), the first cavity A mating table (3025) is provided on the outer wall of the cavity (3021), and the mating table (3025) and the mating groove (3031) on the protective cover (303) are mutually positioned to seal the vacuum jacket (302) and the protective cover. (303) are connected. 11. The ablation needle system according to claim 9, characterized in that, the outer wall of the conversion sleeve (315) is provided with a connecting boss (3153), and the side end of the sealed vacuum jacket (302) is connected to the abut against one side of the connecting boss (3153); The other side of the second quick connection device (301) abuts against the other side of the connection boss (3153), so that the sealed vacuum jacket (302), the conversion sleeve (315) and the second quick connection device (301) for sealing connection. 12. The ablation needle system according to claim 10, characterized in that, the central part of the partition between the first cavity (3021) and the second cavity (3022) is provided with a flow-in and return hole and a sealing hole (3024), the inlet-return component (310) runs through the inlet-reflux and sealing hole (3024). 13. The ablation needle system according to claim 10, characterized in that the sealing vacuum jacket (302) is further provided with at least 4 holes distributed along the circumference of the inlet-reflux and sealing holes (3024). Sealing port (3023). 14. The ablation needle system according to claim 8, characterized in that, the second quick connection device (301) is connected to the first quick connection device (260) through sliding engagement, The second quick connection device (301) includes: A first flange (3011) for placing a seal (306); a second flange (3013), the diameter of which is the same as that of the sealed vacuum jacket (302); an elastic moving sleeve (304), sleeved on the outside of the first flange (3011) or the second flange (3013), to form a space for accommodating the elastic member (3041); One end of the elastic member (3041) abuts against the protruding end of the first flange (3011) or the second flange (3013), and the other end of the elastic member (3041) abuts against On the top block (3042) of the elastic moving sleeve (304), when the elastic moving sleeve (304) moves along the Y-axis negative direction, the elastic member (3041) is compressed, so that the second quick connecting device (301 ) is unlocked with the first quick connection device (260); the elastic moving sleeve (304) moves along the positive direction of the Y-axis under the restoring force of the elastic member (3041), so that the second quick connection The connection device (301) is locked with the first quick connection device (260). 15. The ablation needle system according to claim 14, characterized in that, the first flange (3011) is provided with a ball hole (3014), and the ball hole (3014) is configured to A tapered hole with tapered diameter from the outer wall to the inner wall of the blue (3011); Balls (3012) are arranged in the ball hole (3014), and the top block (3042) is arranged at a position corresponding to the ball hole (3014); A fitting groove (261) is provided on the outer wall of the first quick connecting device (260), and the fitting groove (261) has an inclined wall (2611); The outer wall of the first quick connection device (260) is provided with a matching groove (261), and when the elastic moving sleeve (304) moves along the Y-axis negative direction, the top block (3042) and the ball The holes (3014) are staggered from each other, so that the balls (3012) can be pushed into the ball holes (3014) by the inclined wall (2611), so that the second quick connecting device (301) is connected to the first quick connecting device. connecting device (260) is unlocked; When the elastic moving sleeve (304) moves along the Y-axis positive direction, the top block (3042) corresponds to the ball hole (3014), so that the ball (3012) moves from the ball hole ( 3014) is exposed and enters into the fitting groove (261), thereby locking the second quick connection device (301) with the first quick connection device (260). 16. The ablation needle system according to claim 15, characterized in that, the second quick connection device (301) is connected to the first quick connection device (260) through sliding elastic engagement, The second quick connection device (301) includes a connecting sleeve (308) and an elastic engaging element (307) arranged on the connecting sleeve (308); The connecting sleeve (308) is provided with a connecting hole (3081), the elastic engaging element (307) is arranged in the connecting hole (3081), and the elastic engaging element (307) includes a plunger (3073 ), spring (3072) and top ball (3071); A tapered hole is arranged in the plunger (3073), and the top ball (3071) and the spring (3072) are arranged in the tapered hole; A fitting groove (261) is provided on the outer wall of the first quick connecting device (260), and the fitting groove (261) has an inclined wall (2611); When the first quick connection device (260) is pulled along the positive direction of the Y axis, the fitting groove (261) is misaligned with the top ball (3071), and the top ball (3071) is held by the inclined wall (2611) push, thereby compressing the spring (3072), so that the push ball (3071) retracts in the tapered hole of the plunger (3073), so that the second quick connection device (301) and the first quick connection device ( 260) unlock; When the first quick connection device (260) is pushed along the negative direction of the Y axis, the first quick connection device (260) is inserted into the second quick connection device (301), and the matching groove (261) and The top ball (3071) is corresponding, and the top ball (3071) is snapped into the matching groove (261) by the tapered hole of the plunger (3073) under the push of the spring (3072), so that the The second quick connection device (301) is locked with the first quick connection device (260).

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