CN111803170A - Interventional medical device pusher and interventional medical device delivery system - Google Patents

Abstract

The invention provides an interventional medical instrument pusher and an interventional medical instrument conveying system. The interventional medical instrument pusher comprises a pushing cable and a pushing handle which is slidably sleeved on the pushing cable; the pushing handle comprises a frame body and a locking piece arranged in the frame body, and the locking piece moves relative to the frame body to enable the pushing handle to lock or unlock the pushing cable. The interventional medical device delivery system comprises the interventional medical device pusher. The interventional medical instrument pusher and the interventional medical instrument conveying system can be conveniently pushed, the pushing speed is improved, and the operation time is saved.

Description

Interventional medical device pusher and interventional medical device delivery system

technical field

The invention relates to the technical field of medical devices, in particular to an interventional medical device pusher and an interventional medical device delivery system.

Background technique

Minimally invasive interventional surgery is more and more widely used in clinical applications, and the delivery system of endovascular interventional medical devices (such as left atrial appendage occluder, vascular plug, filter, etc.) usually includes a conveyor, a dilator, a loader, a pusher, etc. part, wherein the delivery device includes a delivery sheath and a sheath hub. The delivery sheath and dilator first establish a channel, then withdraw the dilator, insert the interventional medical device into the loader through the pusher, then connect the sheath tube holder and the loader, and introduce the interventional medical device into the delivery sheath through the pusher until The interventional medical device is delivered to the target site.

The existing pusher usually includes a flexible steel cable and a push handle fixed at the proximal end of the steel cable, and the distal end of the steel cable is detachably connected to the interventional medical device to be delivered. During most of the pushing process when the interventional medical device is closer to the target position at the beginning of pushing, due to the long length of the steel cable between the handle and the inlet of the loader, the handle is far away from the inlet of the loader, and the steel cable is flexible and can pass through Pushing the cable with the handle will only bend the steel cable, and the pushing force cannot be effectively transmitted. That is to say, the handle of the existing pusher does not actually work in most of the pushing process, and the operator can only use his hand. Hold the wire cable close to the loader inlet and push. However, the diameter of the steel cable is small, it is inconvenient to hold, and the speed of the steel cable is limited, which prolongs the operation time and increases the risk of surgery.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an interventional medical device pusher and an interventional medical device delivery system in view of the defects of the prior art, which can facilitate the pushing, improve the pushing speed and save the operation time.

In order to solve the above technical problems, the present invention first provides an interventional medical device pusher, which includes a push cable and a push handle slidably sleeved on the push cable; the push handle includes a frame and a A locking member in the frame, the locking member moves relative to the frame so that the push handle locks the push cable or releases the push cable.

The present invention also provides an interventional medical device delivery system, including a conveyor, a loader and an interventional medical device pusher, wherein the conveyor includes a sheath, and the loader includes a loading tube connected to the proximal end of the sheath , the interventional medical device pusher includes a push cable and a push handle slidably sleeved on the push cable; the push handle includes a frame body and a locking member arranged in the frame body, the lock The fastener moves relative to the frame so that the push handle locks the push cable or releases the push cable. The push cable in the interventional medical device pusher is movably inserted into the loading tube and the sheath tube.

In the interventional medical device pusher and the interventional medical device delivery system provided by the present invention, the push handle includes a frame body and a locking member disposed in the frame body, and the locking member moves relative to the frame body to lock or Unlocking the push cable; in the process of pushing the interventional medical device, the operator is allowed to repeatedly perform: locking the push cable with the push handle, pushing the push cable with the push handle, unlocking the push cable with the push handle, pushing the push cable The handle is slid into position on the push cable and the push handle is used again to lock the push cable, so that the push handle can always be easily adjusted relative to the push cable to be suitable for the operator to hold and for the operator to pass the push The position where the handle pushes the push cable can effectively transmit the push force of the push handle to the push cable. Therefore, the interventional medical device pusher and the interventional medical device delivery system of the present invention can be easily pushed, significantly improve the pushing speed, and save operation time.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the implementation manner. As far as technical personnel are concerned, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of an interventional medical device delivery system provided by a first embodiment of the present invention. The interventional medical device delivery system includes a conveyor, a dilator, a loader, a hemostatic valve and an interventional medical device pusher.

FIG. 2 is a schematic three-dimensional structural diagram of a push handle of the interventional medical device pusher in FIG. 1 .

FIG. 3 is a schematic three-dimensional structural diagram of the push handle in FIG. 2 from another perspective.

FIG. 4 is a cross-sectional view of the push handle of FIG. 2 .

FIG. 5 is a schematic diagram of a use state of the interventional medical device pusher in FIG. 1 .

FIG. 6 is a partial cross-sectional view of FIG. 5 .

FIG. 7 is a partial cross-sectional view of the interventional medical device pusher of FIG. 1 in another state of use.

FIG. 8 is a schematic diagram of another use state of the interventional medical device pusher shown in FIG. 7 .

FIG. 9 is a schematic view of the dilator and the delivery device of FIG. 1 combined to form a dilation assembly.

FIG. 10 is a schematic structural diagram of the conveyor, the loader and the hemostatic valve in FIG. 1 after being connected.

11 is a schematic diagram of a use state of the interventional medical device delivery system provided by the first embodiment of the present invention.

12 is a schematic view of the end surface structure of the push handle in the interventional medical device pusher of the interventional medical device delivery system provided by the second embodiment of the present invention.

FIG. 13 is a cross-sectional view of FIG. 12 .

FIG. 14 is an exploded schematic view of FIG. 13 .

FIG. 15 is a schematic view of the end surface structure of the locking member in FIG. 14 .

FIG. 16 is a schematic side view of the structure of the locking member in FIG. 15 .

17 is a schematic diagram of a use state of the interventional medical device pusher provided by the second embodiment of the present invention.

FIG. 18 is a cross-sectional view of FIG. 17 .

19 is a schematic diagram of another use state of the interventional medical device pusher provided by the second embodiment of the present invention.

FIG. 20 is a cross-sectional view of FIG. 19 .

FIG. 21 is a schematic structural diagram of an interventional medical device pusher according to a third embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Furthermore, the following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the invention may be practiced. Directional terms mentioned in the present invention, such as "up", "down", "front", "rear", "left", "right", "inside", "outside", "side", etc., only Reference is made to the directions of the accompanying drawings, therefore, the directional terms used are for better and clearer description and understanding of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, in a specific orientation construction and operation, and therefore should not be construed as limiting the invention.

Orientation definition: For the sake of clarity, the end close to the operator is referred to as the "proximal end" and the end away from the operator is referred to as the "distal end"; "axial" refers to the end parallel to the distal end of the interventional medical device. The direction of the line connecting the center and the proximal center; "radial" refers to the direction perpendicular to the above-mentioned axial direction. The above definitions are only for the convenience of expression, and should not be construed as limiting the present invention.

Referring to FIG. 1 , the present invention provides an interventional medical device delivery system 100 , which includes a delivery device 20 , a dilator 40 , a loading device 60 , a hemostatic valve 70 and an interventional medical device pusher 80 . The delivery device 20 includes a sheath tube 22 and a sheath tube base 25 connected to the proximal end of the sheath tube 22 . The dilator 40 includes an expansion rod 42 and a connection portion 45 connected to the proximal end of the expansion rod 42 . The expansion rod 42 can be movably inserted into the sheath tube 22 , and the connection portion 45 is detachably connected to the sheath tube seat 25 . the proximal end. The loader 60 includes a loading tube 62, a first connector 64 disposed at the distal end of the loading tube 62, and a second connector 66 disposed at the proximal end of the loading tube 62; the first connector 64 of the loader 60 is connected to At the proximal end of the sheath tube base 25 , the second connector 66 is connected to the hemostatic valve 70 . The interventional medical instrument pusher 80 is used to push the interventional medical instrument, and includes a push cable 82 and a push handle 83 slidably sleeved on the push cable 82 . The push cable 82 is preferably, but not limited to, a flexible steel cable. The push handle 83 includes a frame body 85 and a locking member 87 disposed in the frame body 85. The locking member 87 moves relative to the frame body 85 so that the push handle 83 locks the push cable 82 or loosens the push cable 82. The push cable 82 is pushed, so the push handle 85 can be locked on the push cable 82 and can also be slid on the push cable 82 . When the push handle 83 is locked at the proper position on the push cable 82, it is convenient for the operator to hold the push handle 83 to push the push cable 82; when the push handle 83 releases the locking of the push cable 82, it is convenient for the operator The push handle 83 is slid on the push cable 82 and adjusted to a proper position. The suitable position refers to the position where the push handle 83 is suitable for the operator to hold and is convenient for the operator to push the push cable 82 through the push handle 83 during the operation. In the suitable position, the push handle 83 is closer to the proximal end nozzle of the loading tube 62, and the push force of the push handle 83 to the push cable 82 can be effectively transmitted.

During the process of pushing the interventional medical device, the interventional medical device pusher 80 of the present invention allows the operator to repeatedly perform: locking the push cable 82 with the push handle 83 , pushing the push cable 82 with the push handle 83 , and using the push handle 83 to push the push cable 82 . The handle 83 unlocks the push cable 82, slides the push handle 83 into place on the push cable 82, and uses the push handle 83 again to lock the push cable 82 so that the push handle 83 can always be easily accessible relative to the push cable 82 It can be adjusted to a position suitable for the operator to hold and convenient for the operator to push the push cable 82 by pushing the handle 83, and the pushing force of the push handle 83 to the push cable 82 can be effectively transmitted. Therefore, the interventional medical device of the present invention The pusher 80 can facilitate the push, significantly improve the push speed, and save the operation time.

Please refer to FIG. 2 to FIG. 4 together. The frame body 85 includes a base 850. The base 850 includes a rectangular base plate 8501, two support plates 8502 disposed on the base plate 8501 at opposite intervals, and two end plates 8503. The two supporting plates 8502 are respectively protruded on two opposite sides of the base plate 8501, and the two end plates 8503 are respectively protruded on the other two opposite sides of the base plate 8501, and are respectively connected to the two end plates 8503. between the support plates 8502. The two end plates 8503 are provided with a pair of through holes 8504, the pair of through holes 8504 are close to the upper surface of the base plate 8501, and the diameter of the through holes 8504 is slightly larger than the diameter of the push cable 82, so that the push cable 82 can slide The push cable 82 is slidably inserted between the two support plates 8502 , and the push cable 82 is supported by the upper surface of the base plate 8501 . The base plate 8501 , the two support plates 8502 and the two end plates 8503 enclose a receiving space 852 . The upper surface of the base plate 8501 refers to the surface of the base plate 8501 facing the receiving space 852 . Rolling and/or sliding the locking member 87 moves the locking member 87 relative to the base plate 8501 in a direction not parallel to the axial direction of the push cable 82 and approaches the base plate 8501 so that the The push cable 82 is locked between the locking member 87 and the base plate 8501 , so that the push handle 83 locks the push cable 82 .

In this embodiment, the base 850 is made of materials such as nylon, rubber or plastic. After the locking member 87 and the base plate 8501 lock the push cable 82, even if the push cable 82 is subjected to push resistance, due to the push cable There is static friction between 82 , the locking member 87 and the base plate 8501 in the pushing direction, and the push cable 82 and the push handle 83 remain relatively static, that is, the push handle 83 is fixed on the push cable 82 .

The base 850 further includes a non-slip pad 854, the anti-slip pad 854 is attached to the upper surface of the base plate 8501, and the anti-slip pad 854 can increase the static friction between the push cable 82 and the push cable 82 when the push cable 82 is locked. , the anti-skid pad 854 can increase the friction force and further prevent the sliding of the push cable 82 . Specifically, a receiving groove 8506 is formed on the base plate 8501 , and the anti-skid pad 854 is received in the receiving groove 8506 . The anti-skid pad 854 may be a silicone pad or a rubber pad or the like.

In other embodiments, the upper surface of the substrate 8501 may be provided with textures or grooves or roughened to increase the frictional force between the push cable 82 and the upper surface of the substrate 8501 to further stabilize the locking effect and effectively prevent pushing The cable 82 slides.

A pair of guide grooves 8507 are defined on the two support plates 8502 . In a direction not parallel to the axial direction of the push cable 82 , the pair of guide grooves 8507 extend from a side away from the base plate 8501 toward a side close to the base plate 8501 . The locking member 87 includes a locking portion 872 located between the two support plates 8502 , and a connecting shaft 874 protruding from the locking portion 872 , and the connecting shaft 874 is away from both ends of the locking portion 872 . Installed into the pair of guide grooves 8507 respectively, the connecting shaft 874 can roll and/or slide in the pair of guide grooves 8507 .

In this embodiment, the locking portion 872 is a cylindrical locking wheel. At least one guide groove 8507 is provided with a limit hook 8508 at the end of the base plate 8501 , and the connecting shaft 874 accommodated in the guide groove 8507 is provided with a tooth that engages with the limit hook 8508 . When rolling and/or sliding the locking wheel to the end of the guide groove 8507 close to the base plate 8501, the locking teeth of the connecting shaft 874 engage with the limiting hook 8508, and the push cable 82 is locked to the locking wheel and the substrate 8501.

Specifically, in one embodiment, the guide groove 8507 is substantially arc-shaped, and the guide groove 8507 extends from the proximal end of the base plate 8501 to the distal end of the base plate 8501 obliquely with respect to the axial direction of the push cable 82, so that the The height of the guide groove 8507 on the support plate 8502 gradually decreases from the proximal end to the distal end, that is, the distal end of the guide groove 8507 is adjacent to the base plate 8501, and the proximal end of the guide groove 8507 is far away from the base plate 8501. At the distal end, the connecting shaft 874 moves along the proximal end of the guide groove 8507 to the distal end, so that the locking wheel gradually approaches the push cable 82 until the push cable 82 is locked. On the limit hook 8508. When the push cable 82 is pushed, the engagement between the locking teeth and the limit hook 8508 can balance the torque exerted by the static friction force on the locking wheel, preventing the locking wheel from reversing and loosening the push cable 82 .

In one embodiment, the outer peripheral surface of the locking wheel is wrapped with a non-slip pad 876. In this embodiment, the non-slip pad 876 is a silicone ring, and the silicone ring and the locking wheel are connected together by an interference fit. . When the locking wheel locks the push cable 82 , the anti-skid pad 876 can increase the static friction force between the push cable 82 and the locking portion 872 , thereby further preventing the push cable 82 from sliding.

In other embodiments, the outer surface of the locking portion 872 can also be provided with textures or grooves or roughened to increase the static friction between the push cable 82 and the outer surface of the locking portion 872 to further stabilize the locking effect , effectively preventing the sliding of the push cable 82 .

In other embodiments, the guide groove can also extend in a direction perpendicular to the axial direction of the push cable 82 , that is, the guide groove is perpendicular to the axial direction of the push cable 82 , that is, perpendicular to the base plate 8501 . The direction is gradually approaching the base plate 8501, and the locking member 87 slides and/or rolls in the guide slot until the locking member 87 squeezes the push cable 82 against the base plate 8501, after which the operator can press the locking member 87 with his finger to achieve To lock the push cable 82 , releasing the finger pressing on the locking member 87 releases the locking of the push cable 82 , and the push handle 83 can slide on the push cable 82 . In addition, elastic hooks can also be provided between the locking member 87 and the support plate 8502, so that the locking member 87 can be clamped on the support plate 8502 to lock the push cable 82; when the elastic hook is operated to release the After the locking member 87 and the support plate 8502 are fastened, the locking of the push cable 82 is released, and the push handle 83 can slide on the push cable 82 to facilitate adjusting the push handle 83 to a proper position on the push cable 82 .

In other embodiments, the guide groove 8507 extends from the distal end of the base plate 8501 to the proximal end of the base plate 8501 obliquely with respect to the axial direction of the push cable 82 , so that the guide groove 8507 on the support plate 8502 extends from the distal end to the proximal end. The height gradually decreases, that is, the proximal end of the guide groove 8507 is adjacent to the base plate 8501 , and the distal end of the guide groove 8507 is away from the base plate 8501 . The limit hook 8508 is disposed at the proximal end of the guide groove 8507, and the connecting shaft 874 moves from the distal end to the proximal end of the guide groove 8507, so that the locking portion 872 gradually approaches the push cable 82 until the push cable 82 is locked, and the , the locking teeth of the connecting shaft 874 are engaged with the limiting hook 8508 .

5 and 6, when the push cable 82 is assembled with the push handle 83, the locking member 87 of the push handle 83 is rolled to the proximal end along the guide groove 8507 to keep the locking portion 872 away from the base plate 8501; The distal end of the base 850 passes through a pair of through holes 8504 from the proximal end of the base 850, there is no contact between the push cable 82 and the locking member 87, and there is no relative force, and the push handle 83 is slidably sleeved on the push cable 82, so that the push handle 83 can be slid to a position that is convenient for the operator to hold.

7 and 8, when the push cable 82 needs to be pushed by the push handle 83, the locking member 87 rolls from the proximal end to the distal end along the guide groove 8507, so that the anti-skid pad 876 on the locking member 87 is close to the push cable 82, Until the locking teeth of the connecting shaft 874 are engaged with the limiting hook 8508 . At this time, the push cable 82 is clamped between the anti-skid pad 876 of the locking member 87 and the anti-skid pad 854 on the base plate 8501, that is, the push cable 82 is locked, and the push handle 83 and the push cable 82 are fixed. , holding the handle 83 can push the push cable 82, which is convenient to use.

Referring to FIG. 9 , during the operation, the dilator 40 needs to be assembled into the delivery device 20 first to form an expansion assembly. Specifically, the expansion rod 42 of the dilator 40 passes through the sheath tube from the proximal end of the delivery device 20 in sequence. The base 25 and the sheath 22 until the connecting portion 45 of the dilator 40 is connected to the proximal end of the sheath base 25 . In this embodiment, the connecting portion 45 is connected to the proximal end of the sheath tube base 25 by screwing.

Referring to FIG. 10, after the dilator 40 is withdrawn from the delivery device 20, the loading device 60 needs to be installed on the proximal end of the delivery device 20. Specifically, the distal end of the loading tube 62 is inserted into the proximal end of the sheath tube holder 25, so that the The loading tube 62, the sheath tube holder 25 and the sheath tube 22 form a communication channel. The first connector 64 of the loader 60 is connected to the sheath base 25 , so that the loader 60 is fixedly connected to the conveyor 20 . A hemostatic valve 70 is connected to the proximal end of the loader 60 , and a three-way valve is provided on the hemostatic valve 70 .

Referring to FIG. 11 , the following describes the use process of the interventional medical device delivery system 100 of the present invention by taking the surgical process of clinically delivering a left atrial appendage occluder as an example:

Connect the dilator 40 and the delivery device 20 to form the expansion assembly shown in FIG. 9 ; move the expansion assembly along the track established by the guide wire (not shown), from the femoral vein through the atrial septum, to the left atrial appendage, and then withdraw the dilator 40, retaining the sheath tube 22 in the body to establish a passage from the body to the body;

Connect the hemostatic valve 70 and the loader 60 together, and roll the locking member 87 to the distal end along the guide groove 8507 until the locking teeth of the connecting shaft 874 of the locking member 87 are engaged with the limit hook 8508, and the push cable 82 is locked. , hold the push handle 83 and push the distal end of the push cable 82 through the hemostatic valve 70 and the loader 60 in sequence, and then connect the distal end of the push cable 82 to the proximal end of the left atrial appendage occluder detachably on the At the same time, the push cable 82 is withdrawn to the proximal end so that the left atrial appendage occluder is received into the loading tube 62 of the loading device 60;

The loading tube 62 is threadedly connected to the sheath tube base 25, that is, the distal end of the loading tube 62 is inserted from the proximal end of the sheath tube base 25, and the first connector 64 is connected to the proximal end of the sheath tube base 25 to obtain a left Interventional medical device delivery system for atrial appendage occluder;

Use the push handle 83 to push the push cable 82 to the distal end to deliver the left atrial appendage occluder to the predetermined position of the left atrial appendage and deploy it; during this process, the operator repeatedly executes: push the push handle 83 cable 82, use the push handle 83 to unlock the push cable 82, slide the push handle 83, adjust to the proper position on the push cable 82, and use the push handle 83 again to lock the push cable 82 so that the push handle 83 is relative to the push The cable 82 can always be conveniently adjusted to a position suitable for the operator to hold and facilitate the operator to push the push cable 82 by pushing the handle 83, and the pushing force of the push handle 83 to the push cable 82 can be effectively transmitted, The operation is simple and reliable, and the pushing efficiency is high; specifically: hold the push handle 83 by hand, operate the locking member 87 with the thumb, first roll the locking member 87 toward the proximal end, release the locking of the push cable 82, and slide the push handle 83 to At a suitable position, that is, a position that is convenient for the operator to hold, and then use the thumb to operate the locking member 87 to roll to the distal end along the guide groove 8507, so that the locking teeth of the connecting shaft 874 of the locking member 87 are clamped on the limit hook 8508, Lock the push cable 82, hold the push handle 83 and push the push cable 82 to slide to the distal end until the push handle 83 abuts the proximal end of the loader 60; Slide the push handle 83 to a suitable position at the proximal end, lock the push cable 82, hold the push handle 83 to push the push cable 82, and reciprocate in this way until the left atrial appendage occluder is delivered to the predetermined position; further , it is possible to assess whether the LAA occluder has reached the predetermined position by means of angiography, and adjust the position of the LAA occluder accordingly to make it reach the predetermined position;

Release the connection between the left atrial appendage occluder and the push cable 82 to release the left atrial appendage occluder.

Referring to FIGS. 12 to 16 , the structure of the interventional medical device delivery system provided by the second embodiment of the present invention is similar to the structure of the first embodiment, the difference is: the pushing of the interventional medical device delivery system of the second embodiment The structure of the handle 83a is different from that of the push handle 83 in the first embodiment. In the second embodiment, the push handle 83a includes a frame body and a locking member 835 disposed in the frame body. The frame body includes a base 830 and a rotating cover 837 rotatably connected to one end of the base 830. The locking member 835 is provided with Between the base 830 and the rotating cover 837, the base 830 is axially provided with a first axial through hole 8301, and the rotating cover 837 has a second axial through hole 8377 corresponding to the first axial through hole 8301, and the push wire The cable 82 is slidably inserted into the first axial through hole 8301 and the second axial through hole 8377 . The locking member 835 includes a clip 8352 slidably sleeved on the push cable 82, and the rotating cover 837 rotates relative to the base 830 to push the locking member 835 to move the locking member relative to the base 830, so that the clip The head 8352 is elastically deformed to lock the push cable 82 .

Specifically, the base 830 is a cylindrical body with an open proximal end and a closed distal end. The inner surface of the distal end of the cylindrical body is axially protruded toward the proximal end with a cylindrical body 8302 extending from the cylindrical body 8302 . to the proximal face adjacent to the cylinder. An annular connecting space 8303 is formed between the outer peripheral surface of the cylindrical body 8302 and the inner peripheral surface of the cylindrical body, and the connecting space 8303 is used for accommodating the rotating cover 837 . The first axial through hole 8301 is axially opened in the middle of the cylinder 8302. The first axial through hole 8301 includes a receiving hole 8304 close to one end of the rotating cover 837, and a through hole communicating with the distal end of the receiving hole 8304. 8305. The inner diameter of the receiving hole 8304 is larger than the inner diameter of the insertion hole 8305 , and the inner diameter of the insertion hole 8305 is slightly larger than the diameter of the push cable 82 , so that the base 830 can be slidably sleeved on the push cable 82 . The proximal end of the outer peripheral surface of the cylinder 8302 is provided with an external thread 8306 , and the rotating cover 837 is screwed on the external thread 8306 .

The locking member 835 also includes a sleeve 8354 slidably sleeved on the push cable 82 , the collet 8352 is connected to the end of the sleeve 8354 close to the rotating cover 837 , and the sleeve 8354 is slidably received in the cylinder 8302 . Inside the receiving hole 8304. When the sleeve 8354 of the locking member 835 is inserted into the receiving hole 8304 , the collet 8352 stops at the proximal opening of the receiving hole 8304 . The axial length of the sleeve 8354 is smaller than the axial length of the receiving hole 8304 . The collet 8352 includes at least two elastic clamping blocks 8355, a radial gap is provided between the adjacent elastic clamping blocks 8355, and an inclined guide surface 8356 is provided at one end of each elastic clamping block 8355 close to the sleeve 8354, The guide surface 8356 gradually decreases in diameter from the proximal end to the distal end. The proximal opening of the receiving hole 8304 is rounded or chamfered. When the rotating cover 837 pushes the chuck 8352 to move to the distal end, the rounded or chamfered corners are more likely to make the elastic clamping block 8355 The guide surface 8356 of the 100 is pressed into the receiving hole 8304, so that each elastic clamping block 8355 is elastically deformed and gathered. In this embodiment, the number of elastic clamping blocks 8355 of the collet 8352 is four, the four elastic clamping blocks 8355 are circumferentially arrayed at the proximal end of the sleeve 8354, and one end of each collet 8352 facing the sleeve 8354 is provided with a Guide surface 8356.

The rotating cover 837 includes a circular cover plate 8371, and a connecting cylinder 8373 arranged on the peripheral edge of the cover plate 8371. The connecting cylinder 8373 can be rotatably accommodated in the connecting space 8303. The inner surface of the distal end of the connecting cylinder 8373 is provided with The external thread 8306 of the cylinder 8302 corresponds to the internal thread 8375. The second axial through hole 8377 is opened in the middle of the cover plate 8371 , and the push cable 82 can slide through the second axial through hole 8377 . An operating rod 8378 is disposed on the proximal surface of the cover plate 8371 , and the rotating cover 837 can be driven to rotate relative to the base 830 by swinging the operating rod 8378 .

When assembling the push handle 83a, insert the sleeve 8354 of the fastener 835 into the receiving hole 8304 of the base 830 until the guide surface 8356 of the elastic clamping block 8355 abuts against the proximal opening of the receiving hole 8304; screw the rotating cover 837 on On the cylinder 8302, specifically, the connecting cylinder 8373 of the rotating cover 837 is accommodated in the connecting space 8303 of the base 830, so that the inner thread 8375 of the rotating cover 837 is screwed on the outer thread 8306 of the cylinder 8302 until the cover plate is The inner surface of 8371 is proximate the proximal end of the collet 8352 of the fastener 835. At this time, the first axial through hole 8301 , the inner cavity of the sleeve 8354 and the second axial through hole 8377 of the cover plate 8371 communicate with each other and are coaxial.

Please refer to FIG. 17 and FIG. 18 together, in this embodiment, the rotating cover 837 is rotated counterclockwise by the operating lever 8378, so that the cover plate 8371 does not contact the proximal end of the elastic clamping block 8355, and the clamping head 8352 is in a natural state; The distal end of the cable 82 passes through the second axial through hole 8377 of the cover plate 8371, the collet 8352, the sleeve 8354 and the first axial through hole 8301 of the base 830 from the proximal end of the rotating cover 837, so that the handle 83a is pushed It is slidably sleeved on the push cable 82 . At this time, the clamp head 8352 does not clamp the push wire cable 82, that is, there is no relative force between the clamp head 8352 and the push wire cable 82, which facilitates the sliding of the push handle 83a to a position that is convenient for the operator to hold.

19 and FIG. 20, when the push cable 82 needs to be pushed by the push handle 83a, first slide the push handle 83 to a proper position on the push cable 82, and turn the rotating cover 837 clockwise through the operating lever 8378 to make the cover plate 8371 pushes the locking member 835, the locking member 835 moves distally relative to the base 830, the guide surface 8356 is pressed by the receiving hole 8304, and the elastic clamping block 8355 is elastically deformed and radial clearance The elastic clips 8355 gather together to lock the push cable 82, the push handle 83a is integrally fixed with the push cable 82, and the push handle 83a can be held to push the push cable 82, which is convenient and reliable.

The operation process of the interventional medical device delivery system provided by the second embodiment of the present invention to deliver an interventional medical device such as a left atrial appendage occluder is similar to that of the first embodiment, but the operator repeatedly uses the push handle 83a to push the push cable 82 , using the push handle 83a to unlock the push cable 82, slide the push handle 83a, adjust it to a proper position on the push cable 82, and use the push handle 83a again to lock the push cable 82. The specific operation steps are different, specifically: by operating The lever 8378 rotates the rotating cover 837 counterclockwise, so that the collet 8352 returns to its natural state, unlocks the push cable 82, slides the push handle 83 to a proper position, and then rotates the rotating cover 837 clockwise through the operating lever 8378 to make the elastic clip The block 8355 is elastically deformed and the radial gap is reduced, the elastic clamping blocks 8355 are gathered together to lock the push cable 82, hold the push handle 83a and push the push cable 82 to the distal end and slide until the push handle 83a against the proximal end of the loader 60; then unlatch the push cable 82, slide the push handle 83a proximally into position, lock the push cable 82, hold the push handle 83a and push the push cable 82, do this back and forth until the left atrial appendage occluder is delivered to the predetermined position. During this process, the push handle 83a can always be easily adjusted relative to the push cable 82 to a position suitable for the operator to hold and to facilitate the operator to push the push cable 82 by pushing the handle 83a, and the push handle 83a The pushing force to the pushing cable 82 can be effectively transmitted, the operation is simple and reliable, and the pushing efficiency is high.

Referring to FIG. 21 , the structure of the interventional medical device delivery system provided by the third embodiment of the present invention is similar to that of the second embodiment, except that the structure of the locking member 835a in the third embodiment is different from that in the second embodiment. The structure of the locking member 835 is different. In the third embodiment, the distal end of the elastic clamping block 8355 of the locking member 835a is provided with a stop surface 8358 abutting against the proximal end surface of the cylinder 8302, and the proximal end of the elastic clamping block 8355 is provided with an inclined The guide surface 8359 of the guide surface 8359 gradually decreases in diameter from the distal end to the proximal end. When the rotating cover 837 pushes against the collet 8352, the stop surface 8358 prevents the collet 8352 from moving to the distal end, so that the proximal end of the collet 8352 can only move proximally relative to the rotating cover 837, and the elastic clamping block 8355 The proximal guide surface 8359 is pressed into the second axial through hole 8377, so that each elastic clamping block 8355 is elastically deformed and gathered. Further, the distal opening of the second axial through hole 8377 is rounded Or the chamfering process makes it easier for the guide surface 8359 of the elastic clamping block 8355 to be pressed into the second axial through hole 8377 . When in use, the rotating cover 837 is rotated clockwise by the operating rod 8378 to make the locking member 835a move proximally relative to the rotating cover 837, and the guide surface 8359 is abutted by the distal opening of the second axial through hole 8377. The elastic clamping blocks 8355 are elastically deformed and the radial gap is reduced, and the elastic clamping blocks 8355 are gathered together to lock the push cable 82, which is convenient to hold the push handle 83a and push the push cable 82 When the rotating cover 837 is rotated counterclockwise by the operating rod 8378, the cover plate 8371 moves toward the proximal end away from the elastic clamping block 8355, and the distal opening of the second axial through hole 8377 releases the guide on the elastic clamping block 8355. The pressing of the lead surface 8359 makes the locking member 835a elastically reset to release the locking of the push cable 82 , which facilitates the sliding of the push handle 83a on the push cable 82 .

The above are the implementations of the embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the embodiments of the present invention, several improvements and modifications can also be made. These improvements and modifications are also It is regarded as the protection scope of the present invention.

Claims (12)

1. The pusher for the interventional medical instrument is characterized by comprising a pushing cable and a pushing handle which is slidably sleeved on the pushing cable; the pushing handle comprises a frame body and a locking piece arranged in the frame body, and the locking piece moves relative to the frame body to enable the pushing handle to lock or unlock the pushing cable.

2. The interventional medical device pusher of claim 1, wherein the frame comprises a base, the push cable is slidably disposed through the base, and a moving direction of the locking member relative to the base is not parallel to an axial direction of the push cable, such that the locking member is close to or away from the push cable to lock or unlock the push cable.

3. The interventional medical device pusher of claim 2, wherein the base comprises a base plate and two support plates disposed on the base plate in a spaced apart relationship, the push cable is slidably disposed between the two support plates, the locking member is connected between the two support plates, and rolling and/or sliding the locking member moves the locking member relative to the base plate in a direction non-parallel to an axial direction of the push cable and closer to the base plate such that the push cable is locked between the locking member and the base plate.

4. The interventional medical device pusher of claim 3, wherein the two support plates are provided with a pair of guide slots; the pair of guide grooves extend from a side away from the substrate toward a side close to the substrate in a direction not parallel to the axial direction of the push cable; the locking part comprises a locking part positioned between the two supporting plates and a connecting shaft convexly arranged on the locking part, and two end parts, far away from the locking part, of the connecting shaft are respectively arranged in the pair of guide grooves, so that the connecting shaft rolls and/or slides in the pair of guide grooves.

5. The interventional medical device pusher of claim 4, wherein the guide slot extends in a direction perpendicular to an axial direction of the push cable; or the guide groove extends obliquely with respect to the axial direction of the push cable toward the distal end or the proximal end of the substrate.

6. The interventional medical device pusher of claim 4, wherein the locking portion is a locking roller, and at least a portion of a surface of the locking roller and/or the base plate is provided with an anti-slip structure.

7. The interventional medical device pusher according to claim 4, wherein at least one of the guide grooves is provided with a limit hook at a distal end thereof adjacent to the base plate, and the connecting shaft is provided with a latch engaged with the limit hook; when the latch is clamped on the limiting hook, the push cable is locked between the locking part and the substrate.

8. The interventional medical device pusher of claim 2, wherein the frame further comprises a rotating cover screwed to one end of the base, the locking member is disposed between the base and the rotating cover, the locking member comprises a collet sleeved on the pushing cable, and the rotating cover rotates to push the locking member to move the locking member relative to the base in a direction perpendicular to an axial direction of the pushing cable, so that the collet is elastically deformed to lock the pushing cable.

9. The interventional medical device pusher of claim 8, wherein the base defines a first axial through hole, the rotating cover defines a second axial through hole corresponding to the first axial through hole, the pushing cable slidably penetrates the first axial through hole and the second axial through hole, the first axial through hole includes a receiving hole near one end of the rotating cover, the locking member further includes a sleeve slidably sleeved on the pushing cable, the collet is connected to one end of the sleeve near the rotating cover, and the sleeve is received in the receiving hole.

10. The interventional medical device pusher of claim 9, wherein the collet comprises at least two elastic clamping blocks, a radial gap is formed between adjacent elastic clamping blocks, an inclined guide surface is arranged at one end of each elastic clamping block close to the sleeve, the rotating cover rotates to push the locking member to move the locking member relative to the base, the guide surface is pressed by the accommodating hole to reduce the radial gap, and the elastic clamping blocks are gathered to lock the pushing cable.

11. The interventional medical device pusher of claim 9, wherein the collet comprises at least two elastic clamping blocks, a radial gap is formed between adjacent elastic clamping blocks, an inclined guide surface is arranged at one end of each elastic clamping block close to the rotating cover, the rotating cover rotates to push the locking member to enable the locking member to move relative to the rotating cover, the guide surface is pressed by the second axial through hole to reduce the radial gap, and the elastic clamping blocks are gathered to lock the pushing cable.

12. An interventional medical device conveying system, characterized by comprising a conveyor, a loader and the interventional medical device pusher as claimed in any one of claims 1 to 11, wherein the conveyor comprises a sheath, the loader comprises a loading tube connected to the proximal end of the sheath, and the pushing cable in the interventional medical device pusher is movably inserted into the loading tube and the sheath.

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