CN103813818B - Liquid circuit set for medical use and liquid circuit system using the liquid circuit set - Google Patents

Abstract

A medical liquid circuit set and a liquid circuit system using the medical liquid circuit set. The liquid circuit set (201) includes a contrast agent line (205), a physiological saline line (206), a syringe line (204), a patient line (208), and a base line portion (210) connected to each line. The contrast agent line (205) is connected to the base line portion (210) using a double-check valve (215A) for allowing the liquid to flow only in a specified direction, and the physiological saline line (206) is also connected to the base line portion (210) using the same double-check valve (215B). The liquid circuit set (201) also includes a release valve (202A) arranged on the physiological saline line (206) and used to open and close the physiological saline line (206) by moving a movable component (203) of the release valve (202A).

Description

Liquid circuit set for medical use and liquid circuit system using the liquid circuit set

technical field

The present invention relates to a liquid circuit set and a system for injecting medical fluids such as contrast medium and physiological saline into a patient, and in particular to a liquid circuit set and a system that can be applied to angiography such as cardiac catheterization.

Background technique

Medical image diagnostic devices include CT (Computed Tomography: Computed Tomography) scanners, MRI (Magnetic Resonance Imaging: Magnetic Resonance Imaging) devices, PET (Positron Emission Tomography: Positron Emission Tomography) devices, angiography ( angiography) and MRA (MRAngio: Magnetic Resonance Angiography) devices, etc. When using the above-mentioned device to take images of patients, the patients are often injected with medical solutions such as contrast medium and physiological saline.

Patent Document 1 discloses a liquid circuit system used for angiography (for example, FIGS. 7A to 7B ). The system is used to introduce the medical solution of the physiological saline source and the contrast medium source connected with the liquid circuit into the syringe, and inject the above-mentioned medical solution toward the patient.

Japanese Patent Laid-Open No. 2007-222656

In addition, in general, when performing angiography, it is necessary to draw a contrast medium into a syringe and inject a contrast medium into a patient, and draw physiological saline into a syringe and inject physiological saline into a patient in a predetermined order (details will be described later). During such angiography, when the operator needs to operate the three-way stopcock of the liquid circuit, if the operator makes an operation error, angiography cannot be properly performed.

Contents of the invention

The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a fluid circuit set and a fluid circuit system that can perform angiography satisfactorily without requiring complicated operations by an operator.

A liquid circuit set according to a technical solution of the present invention in order to achieve the above object is as follows. A medical liquid circuit set, which is applied to angiography, wherein, the liquid circuit set includes: a contrast medium pipeline, which is connected with a contrast medium chamber; a normal saline pipeline, which is connected with the normal saline chamber; a syringe pipeline, which is connected to the syringe; patient pipeline, which is used to deliver contrast medium or saline towards the patient; and a base pipeline part, which is connected to the above-mentioned pipelines, and is connected to the above-mentioned contrast medium pipeline and the above-mentioned normal saline pipeline respectively to form T-shaped, and the liquid circuit set further includes: a first valve member disposed at the connecting portion between the contrast agent pipeline and the base pipeline, and the first valve member is configured to: (i) when the liquid is When it is sucked toward the upstream side of the above-mentioned base line part, the contrast agent flows from the inside of the contrast medium line into the above-mentioned base line part, (ii) when the liquid is squeezed from the upstream side toward the downstream side of the above-mentioned base line part In this case, the liquid flows from the upstream side of the base pipeline part to the downstream side through the valve member; the second valve member is arranged at the connection part between the physiological saline line and the base pipeline part, and the second The valve member is configured such that when the liquid is squeezed from the upstream side toward the downstream side of the base line portion or when the liquid is squeezed from the physiological saline line side toward the second valve member side, the liquid Flowing in a direction from the upstream side of the base pipeline portion toward the downstream side or flowing in a direction from the physiological saline line side toward the second valve member side; and a first release valve (Japanese: リリースバルブ) having a movable member And it is arranged on the above-mentioned physiological saline line, and is used for opening and closing the above-mentioned physiological saline line by moving the above-mentioned movable member.

In addition, a liquid circuit system according to a technical solution of the present invention includes: the above-mentioned medical liquid circuit set; a piston member moves to inject and suck liquid; and a switch holding a part of the liquid circuit set and having a drive member for actuating at least the movable member of the first release valve.

In this specification, "connection" not only means that a predetermined member is directly connected to an object, but also includes a state in which a predetermined member is connected to an object via some other member.

"Connecting in a T-shape" refers to connecting in such a way that the flow path is branched, and the angle at which the pipelines intersect is not limited in any way.

"Chamber (contrast medium/saline solution)" refers to containers such as bottles and bags, and is not limited to a specific shape.

According to the present invention, it is possible to provide a fluid circuit set and a system capable of performing angiography satisfactorily without requiring complicated operations by an operator.

Description of drawings

FIG. 1 is a diagram schematically showing a liquid circuit system according to one embodiment of the present invention.

Fig. 2A is a schematic diagram showing the function of a double check valve.

Fig. 2B is a diagram schematically showing a switch for holding a part of a liquid circuit set.

Fig. 2C is a diagram schematically showing a liquid circuit system according to another embodiment of the present invention.

FIG. 3 is a diagram illustrating a part of an angiography process (aspiration of a contrast medium).

FIG. 4 is a diagram showing a part of the process of angiography (extrusion of a contrast medium).

FIG. 5 is a diagram showing a part of the process of angiography (air removal).

FIG. 6 is a diagram showing a part of the process of angiography (valve operation).

FIG. 7 is a diagram showing a part of the process of angiography (extrusion of a contrast medium).

FIG. 8 is a diagram showing a part of an angiography process (rinsing with physiological saline).

FIG. 9 is a diagram showing a part of the process of angiography (additional rinsing).

FIG. 10 is a diagram showing a part of an angiography process (establishment of a blood channel).

Fig. 11 is a perspective view (disassembled state) of the one-way valve with opening function.

Fig. 12 is a cross-sectional view in the vertical direction of the check valve of Fig. 11 , showing a state where the movable pin protrudes.

13 is a cross-sectional view in the vertical direction of the check valve of FIG. 11 , showing a state where the movable pin is pressed.

FIG. 14 is an enlarged view showing an enlarged part of FIG. 13 .

FIG. 15 is a perspective view showing a state in which a support member, a movable pin, and the like are arranged on the housing main body.

Fig. 16 is a perspective view showing the internal structure of the case main body.

Fig. 17 is a perspective view of a movable pin.

Fig. 18 is a perspective view of a supporting member.

Fig. 19 is a perspective view of the cover seen from below.

Fig. 20 is a diagram showing an example of another pump device for transporting physiological saline.

Fig. 21 is a diagram schematically showing an example of a roller pump.

Fig. 22 is a diagram schematically showing an example of a piston pump.

Fig. 23 is a sectional view showing another example of the relief valve.

Fig. 24 is a cross-sectional view showing still another example of the release valve.

detailed description

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, in the following description, terms indicating directions such as up, down, right, and left are used, but this does not limit the present invention. In addition, the contrast medium and the physiological saline are sometimes referred to simply as "medicine solution" or "liquid" without distinguishing between them.

The liquid circuit system 200 of this embodiment shown in FIG. 1 is used, for example, in cardiac catheterization. The system 200 includes a liquid circuit set 201 (details will be described later), and a contrast agent chamber 221 , a saline chamber 223 , a transducer 270 and a syringe 251 connected to the circuit set 201 . The liquid circuit system 200 further includes an injection head 260 (only a part is shown) for holding the syringe 251 and sucking and pushing out the medical solution.

Specifically, the liquid circuit set 201 in FIG. 1 includes a syringe line 204 connected to the syringe 251, a contrast medium line 205 connected to the contrast medium chamber 221, a physiological saline line 206 connected to the normal saline chamber 223, The transducer line 207 connected to the transducer 270 , the patient line 208 connected to the patient via a catheter (not shown), and the base line unit 210 connected to the respective lines.

The material, length, and diameter of the tubes constituting each of the pipelines 204 to 208 may be appropriately selected in consideration of the pressure applied to the tubes and the like. Since the medical solution is injected at a relatively high pressure during cardiac catheterization, it is preferable that the portion to which a relatively high pressure is applied is formed of a high-pressure-resistant tube. Similarly, it is preferable that the double check valves 215A, 215B, release valves 202A, 202B, and the like described later are high pressure resistant valves.

As shown in FIG. 1 , the "base pipeline part 210" refers to a part connected to the above-mentioned pipelines 204 to 208, and is composed of pipes, valves, connectors, and the like. In this example, the syringe line 204 is connected on the upstream side of the base line portion 210 and the patient line 208 is connected on the downstream side. A contrast medium line 205 , a physiological saline line 206 , and a transducer line 207 are connected in this order from the upstream side to the middle portion of the base line portion 210 . The pipelines 205 to 207 are respectively connected to the base pipeline part 210 in a T-shape.

In the present embodiment, the contrast agent pipeline 205 and the physiological saline pipeline 206 are connected to the base pipeline part 210 through double check valves 215A and 215B, respectively. As an example, the double check valves 215A and 215B (details will be described later). The two double check valves can use the same double check valve, or can use double check valves with different functions. valve. In Figure 1, as an example, the same double check valve is used.

The double check valves 215A, 215B are valves having the following functions (also refer to FIG. 2A ):

(i) When the liquid is sucked toward the upstream side of the base line portion 210 (that is, the syringe 251 side), the liquid is allowed to flow toward the upstream side of the base line portion 210 .

(ii) On the other hand, with the double check valve 215A, when liquid is squeezed from the upstream side toward the downstream side of the base line portion 210 , the liquid flows downstream through the valve 215A. The double check valve 215B allows the liquid to flow toward the downstream side when the liquid is squeezed toward the downstream side in the same way, or when the liquid is squeezed from the saline line 206 side toward the valve 215B side. Alternatively, it flows from the side of the physiological saline line 206 toward the side of the valve 215B.

In addition, as shown in FIG. 2A , double check valves 215A, 215B restrict the flow of liquid from the downstream side to the upstream side and the flow of liquid toward the line 205 , 206 side.

In addition, in FIG. 1 , another valve 215A is disposed upstream of the double check valve 215B. This valve 215A is used to restrict the flow of liquid to the upstream side. Therefore, in this circuit, physiological saline will not be directed to the upstream side. suction.

As shown in FIG. 1 , the transducer line 207 is connected to the base line portion 210 by, for example, a connector 217 without a valve function. A three-way stopcock 213 is provided between the connector 217 and the double check valve 215B. However, the arrangement position of the three-way stopcock 213 is not necessarily limited to this. As shown in FIG. 2C , the stopcock 213 may also be arranged downstream of the air sensor 232 (described in detail later) on the patient line 208 .

In addition, as an example, the three-way cock valve 213 may also be a three-way cock valve that blocks one of the three pipelines connected to it along the direction of the stem of the three-way cock valve 213 (for example, in FIG. In the state of 1, the liquid is prevented from moving to the pipeline (not shown) extending downward). Such a three-way stopcock is used in cases where the operator discharges the liquid in the pipeline to the outside as required.

Next, devices and the like connected to the respective pipelines 204 to 208 will be described. In addition, conventionally known devices can be used for the above-mentioned devices, and thus detailed description thereof will be omitted.

The syringe 251 connected to the syringe line 204 may be, for example, a syringe with a volume of about several tens of ml to 200 ml, and the syringe 251 is preferably a syringe capable of high-pressure injection. A protective cover for covering the syringe 251 may also be used as desired. The syringe 251 has a cylindrical cylindrical member and a piston member (plunger rod) slidably inserted into the cylindrical member. In addition, the piston member may be a so-called rodless type piston member.

The injector (injection head) 260 to which the syringe 251 is detachably attached is not limited, but is preferably a type capable of high-pressure injection, for example. The injector has a motor as a drive source and an urging member that moves in the front-rear direction. The plunger member of the syringe is pulled to fill the syringe with the medicinal solution by pulling the push member, and the liquid in the syringe is pushed out to the outside by pressing the push member.

As an example, the contrast medium chamber 221 connected to the contrast medium pipeline 205 may also be a bottle-shaped container filled with contrast medium. The contrast medium chamber 221 can also be used by being suspended from a sling (not shown), and the contrast medium line 205 is connected to the lower portion of the contrast medium chamber 221 . This connection can also take place via a needle valve.

As shown in FIG. 1 , an air sensor 231 (such as an infrared sensor) for detecting whether air is mixed in the liquid in the contrast medium pipeline 205 is arranged below the contrast medium chamber 221 . By detecting the air in the pipeline with the air sensor 231, it is possible to detect the absence of the chemical solution in the chamber. Below the air sensor 231 and above the contrast agent line 205, a chamber 233 for dripping is arranged. Once the contrast agent from the contrast agent chamber 221 drops into the chamber 233, it will flow from the chamber 233 to the Inside the contrast medium line 205 .

As an example, the saline chamber 223 connected to the saline line 206 may also be a bag-shaped container filled with contrast agent. Pressurizing member 224 (the physiological saline chamber having such a structure is also referred to as a “pressurizing bag”). As the pressurized bag, a commercially available pressurized bag can be used. The pressurizing member 224 is not limited, but the pressurizing member 224 may be a pressurizing member that compresses the bag using a fluid such as air as a driving source, or may be a pressurizing member that compresses the bag using a motor or the like as a driving source. The same air sensor 231 and infusion chamber 233 as the air sensor 231 and infusion chamber 233 of the contrast agent line 205 are also disposed on the physiological saline line 206 . In addition, the mechanism for pressurizing the physiological saline is not limited to the above configuration, and other configurations will be described later.

The physiological saline line 206 is provided with a release valve 202A for switching the opening and closing of the line 206 . A specific configuration example of the relief valve 202A will be described later with reference to FIGS. 11 to 19 . The release valve 202A has a movable member 203 that is moved by an external force, and opens and closes the physiological saline line 206 by switching the valve open/closed state by moving the movable member 203 . In the present embodiment, as an example, the valve 202A is opened by pressing the movable member 203 so that the physiological saline from the pressurized bag flows to the base line portion 210 side.

Next, devices and the like connected to the converter line 207 will be described. As an example, the transducer 270 connected to the line 207 can monitor the patient's pulse by detecting blood pressure. As an example, the pulse waveform can be displayed on a display 271 connected to the transducer 270 .

A release valve 202B similar to the release valve 202A of the physiological saline line 206 is also provided on the inverter line 207 . However, the relief valve 202B is oriented opposite to the relief valve 202A. In this release valve 202B, by pressing the movable member 203 , the medical solution can be brought into a state of flowing toward the inverter 270 side.

In addition, in the example of FIG. 1 , a three-way stopcock 213 is arranged between the release valve 202B of the converter line 207 and the converter 270 . In addition, the movable member 203 of one release valve 202A and the movable member 203 of the other release valve 202B are arranged to face each other. In addition, the distances (L1, L2) from the base line portion 210 to the movable members 203, 203 of the respective valves are arranged so as to correspond to the structure of the switcher 300 described later.

The distal end of the patient line 208 is connected to a thin tube called a catheter (not shown), and the catheter is inserted into a blood vessel of the patient. During cardiac catheterization, the tip of the catheter is moved into, for example, a coronary artery, and a contrast agent or the like is injected into the blood vessel from the tip of the catheter.

Next, the switcher 300 for holding a part of the liquid circuit set 201 of FIG. 1 and appropriately switching the flow therein will be described with reference to FIG. 2B . As an example, the switcher 300 has a box-shaped housing 310 . The switcher 300 has a first holding part 306 for holding a part of the physiological saline line 206 and a second holding part 307 for holding a part of the inverter line 207 . The above-mentioned holding parts 306 and 307 are formed in a concave shape, and are configured so that the release valves 202A and 202B of the respective lines can be installed therein.

Inside a casing 310 of the switcher 300 are provided drive units 301 , 301 that electromechanically press the movable members 203 , 203 of the respective valves 202A, 202B using, for example, a motor as a drive source. The drive units 301 , 301 may be configured to operate based on a control signal from an external controller 350 . The function of the controller 350 is not particularly limited, and may have a function of controlling the injector 260 .

The switcher 300 also has a third holding portion 308 for holding a part of the patient line 208 and an air sensor 332 for detecting the presence or absence of air bubbles in the patient line 208 . As an example, the air sensor 332 may be an ultrasonic air sensor. Even when air bubbles are mixed into the liquid under high pressure conditions, the ultrasonic sensor 332 is advantageous in that it can detect the air bubbles well, compared with an infrared air sensor or the like.

Next, a method of using the liquid circuit kit 201 of the present embodiment configured as described above will be described.

FIG. 3 shows an initial state, which is a state in which the movable members 203, 203 of the release valves 202A, 202B are not pressed and the liquid does not flow in both directions. When the operator presses a predetermined button (purge button) of the injector 260 in the state shown in FIG. 3 , the piston driving mechanism operates to pull the piston member of the syringe 251 . As a result, the syringe 251 and the syringe line 204 become negative pressure, and the contrast medium in the chamber 221 is introduced into the syringe lines 205 , 204 and the syringe 251 through the contrast medium line 205 and the double check valve 215A.

Next, as shown in FIG. 4 , the piston member of the syringe 251 is pressed this time to push the contrast medium out of the syringe 251 . The fluid is sent to the base line part 210 side through the syringe line 204 and fills the base line part 210 through the two double check valves 215A, 215B. As shown in FIG. 4 , the ejection operation of the contrast agent is continued until the contrast agent is ejected at least to the extent that it passes over the double check valve 215B.

Next, as shown in FIG. 5 , the movable member 203 of the release valve 202A and the movable member 203 of the release valve 202B are pressed to open the two valves 202A and 202B. This opening is automatically performed by the drive units 301 , 301 of the switch 300 pressing each movable member. At this point, the pressurizing member 224 of the physiological saline chamber 223 is driven, and a predetermined pressure (for example, about 300 mmHg) is applied to the physiological saline. Therefore, by opening the valve 202A, physiological saline flows from the chamber 223 side toward the base line portion 210, and flows to the patient line 208 side through the release valve 202A and the double check valve 215B. The contrast agent further passes through the three-way stopcock 213 and branches at the connector 217 , a part of the contrast agent flows into the patient line 208 , and another part of the contrast agent flows into the converter line 207 . Here, since the relief valve 202B is open, the physiological saline flows over the relief valve 202B toward the inverter 270 . By filling the respective lines with physiological saline in this way, air bubbles in the lines can be discharged to the outside.

Next, as shown in FIG. 6 , the pressure on the movable member 203 of the release valve 202A of the physiological saline line 206 is released so that the physiological saline does not flow downstream beyond the release valve 202A. In addition, in order not to cause the contrast agent to flow into the inverter 270 side in the next contrast agent injection process, the pressure on the movable member 203 of the release valve 202B of the inverter line 207 is also released, so that the contrast agent, etc., does not overshoot and release. Valve 202B and flow to the converter side.

Next, the piston driving mechanism of the injector 206 is operated to press the piston member of the syringe 251 , thereby pushing the contrast medium in the syringe 251 toward the patient as shown in FIG. 7 . Specifically, the contrast agent is delivered to a predetermined imaging site in the patient's body (for example, the coronary artery of the heart, etc.) through the contrast agent line 204 , the base line unit 210 , the patient line 208 , and a catheter not shown.

Next, after the injection of the contrast agent is completed and the residual pressure in the circuit is sufficiently reduced, the movable member 203 of the release valve 202A of the physiological saline line 206 is pressed to open the valve again as shown in FIG. 8 . Similar to the above-mentioned process, at this point, the physiological saline is in a state where a predetermined pressure (for example, about 300 mmHg) is applied to the physiological saline by the pressurizing member 224 of the pressurizing bag, and therefore, as shown in FIG. 8 , the physiological saline is sent to the base Contrast media is flushed through line section 210 and patient line 208 .

Next, if necessary, as shown in FIG. 9 , the release valve 202B of the inverter line 207 is also opened, thereby allowing physiological saline to flow to the area closer to the inverter than the release valve 202B, and the physiological saline is also used in this area. rinse.

Thereafter, as shown in FIG. 10 , the pressure on the movable member 203 of the check valve 202A of the saline line 206 is released, so that the saline does not flow to the base line 210 side beyond the valve 202A. As a result, the pressurized state of the physiological saline located downstream of the base line portion 210 is released. As a result, as shown in FIG. 10 , a blood path is established through the patient line 208 and the transducer line 207 , and the blood pressure can be detected by the transducer 270 .

As described above, the liquid circuit set 201 of this embodiment includes the contrast medium line 205 , the physiological saline line 206 , the syringe line 204 , the patient line 208 , and the base line portion 210 , and between the contrast medium line 205 and the base line portion 210 Double check valves 215A, 215B for restricting the flow of the liquid in a predetermined direction are provided at the connection portion between the physiological saline line 206 and the base line portion 206 . Therefore, the operator can satisfactorily perform the suction of the contrast medium into the syringe 251 ( FIG. 3 ), the subsequent delivery of the contrast medium ( FIG. 4 ), and the like without manually switching the three-way stopcock. operate.

In addition, in the liquid circuit set 201 of the present embodiment, a release valve 202A is provided on the physiological saline line 206 . In particular, the release valve 202A is a release valve that is switched on and off by pressing the movable member 203, and thus is easier to switch than a release valve of the type that is switched on and off by twisting a lever such as a three-way cock valve. action. Specifically, there is an advantage that it is easy to switch automatically by a switch using a driver such as a motor. Moreover, such a movement of the movable member 203 can be performed in a short time compared with the case of a torsion bar. In addition, in the case of a structure in which the flow path is closed by the function of the relief valves 202A and 202B themselves as in the present embodiment, the flow path can be closed more reliably than in a structure in which the flow path is closed by crushing a tube, for example.

In addition, in the configuration of the present embodiment, since the transducer line 207 can be blocked satisfactorily using the release valve 202B, it is possible to prevent high-pressure liquid from flowing into the On the inverter 270 side, breakage and damage of the inverter 270 can be prevented in advance.

As an example, the liquid circuit set 201 of this embodiment can also be used as a complete set of the contrast agent line 205, the saline line 206, the syringe line 204, the transducer line 207, the patient line 208, and the base line unit 210. That is, the liquid circuit set 201 can be used multiple times, but it may be replaced with a new liquid circuit set 201 after being used on one patient for the purpose of preventing infectious diseases or the like. In this case, the infusion chambers 233 and 233 (or only one of them) of the physiological saline line 206 and the contrast medium line 205 may also be included as a disposable item.

In addition, the liquid circuit system of the present embodiment is a system using the liquid circuit set 201 described above, and the liquid circuit system includes: an injector for carrying out suction and injection (delivery) of liquid with a syringe 251; and a switcher 300 , which is used to automatically switch the opening and closing of the prescribed pipeline of the liquid circuit set 201 . According to such a system, the operator can appropriately perform a series of injecting operations of contrast medium and physiological saline without switching the three-way stopcock, and can also automatically perform all the steps as necessary.

The present invention is not limited to the embodiments described above. For example, instead of a pressurized bag, a tube pump (Japanese: チューブポンプ) that continuously squeezes a flat tube to flow the physiological saline in the tube in a predetermined direction may be used as a structure for extruding physiological saline. Alternatively, a device that repeatedly sucks and extrudes physiological saline by reciprocating a piston member of a small syringe can be used, and this device may use a cam mechanism and a biasing member (such as a spring).

A specific example of a relief valve

Specifically, the relief valves 202A and 202B that can be used in the liquid circuit system 200 of FIG. 1 may be relief valves as described below. In addition, an example of the configuration of the release valve will be described below with reference to FIGS. 11 to 19 , but the present invention is not limited to the following steps. In addition, below, the valve corresponding to release valve 202A, 202B is demonstrated as "one-way valve 1". The movable member 223 corresponds to "the movable pin 60".

In addition, the one-way valves shown in FIGS. 11 to 19 are used to switch between the state of the one-way valve allowing the liquid medicine to move in one direction and the open state allowing the liquid medicine to move in two directions, but as shown in FIG. 1 Relief valves can also be used to switch between a closed state that completely blocks the movement of liquid and an open state that allows liquid to move in both directions (the direction of liquid flow depends on the pressure difference of the liquid).

The check valve 1 of this embodiment shown in FIG. 11 is mainly used in a medical liquid circuit. In particular, the one-way valve 1 has high pressure resistance, and can be applied, for example, to cardiac catheterization. As shown in Fig. 11 and Fig. 12, the one-way valve 1 includes: a casing 50, which constitutes a valve chamber 10; a disc-shaped valve core 25, which is arranged in the valve chamber 10; a movable pin 60, which can move and a cover 70 attached to the housing 50 so as to cover the movable pin 60 .

The check valve 1 is connected to a supply pipe P1 and a discharge pipe P2. Basically, the check valve 1 only allows the liquid medicine to flow from the supply pipe P1 toward the discharge pipe P2, and allows the liquid medicine to flow in both directions only while the movable pin 60 is pressed. In addition, since the direction in which the chemical solution flows depends on the pressure of the chemical solution in the pipes P1 and P2, it can also be in a flow direction other than the above-mentioned flow direction under predetermined pressure conditions. As an example, under the condition that the hydraulic pressure on the P2 side is higher than the hydraulic pressure on the P1 side, the chemical solution does not flow when the movable pin 60 is not pressed, and the chemical solution flows from the P2 side only while the movable pin 60 is pressed. P1 side flow.

As an example, each component of the housing 50, the movable pin 60, the cover 70, and the supporting member 21 described later may be a resin molded product, but is not limited thereto.

As shown in FIGS. 11 and 12 , the casing 50 has a casing main body 40 connected to the supply pipe P1 and a substantially cylindrical closure member 30 connected to the discharge pipe P2 . When the closing member 30 is attached to the case main body 40, the valve chamber 10 is formed between the two members. An inlet portion 11 ( FIG. 12 ) for supplying the chemical solution into the valve chamber is formed on the upstream side of the valve chamber 10 , and an outlet portion 13 for sending the chemical solution to the outside is formed on the downstream side of the valve chamber 10 .

The valve chamber 10 has a substantially horizontal cylindrical shape, and the downstream side of the valve chamber 10 has a tapered shape in which the cross-sectional area gradually decreases toward the outlet portion 13 side. A valve element 25 (described later in detail) for opening and closing the inlet portion 11 and a support member 21 (described in detail later) for pressing the valve element 25 are arranged in the valve chamber 10 .

The shape of the case main body 40 will be described in detail with reference to FIG. 15 . As shown in FIG. 15 , the housing main body 40 has: a cylindrical (one example) main body portion 41 for constituting the valve chamber 10; and a pipe holding portion 48 connected to the supply pipe P1. The pipe holding portion 48 is A cylindrical portion thinner than the main body portion 41 provided on the upstream side. The material of the casing main body 40 is not limited, and it may be a see-through material such that the inside of the valve can be seen, or a non-see-through material.

The end portion of the supply pipe P1 is inserted into the inside of the pipe holding portion 48 . The supply pipe P1 is connected to the inside of the pipe holding portion 48 with sufficient strength by a conventionally known method so that the pipe does not come off even if the hydraulic pressure increases. In order to connect the supply pipe P1 with good workability, one or more ribs are formed on the pipe holding portion 48 . In this example, ribs 49 f and 49 f protruding radially are respectively formed one by one on the upper part and the lower part of the cylindrical part 49 .

As shown in Fig. 15 and Fig. 16, the main body part 41 has a shape such that the cylinder is set horizontally, and the valve element 25 (see Fig. 11) and the supporting member 21 (for The above-mentioned components are described in detail later). As shown in FIG. 16 , an inlet portion 11 for supplying the liquid medicine is formed on a part of the wall surface 41h inside the main body.

In this example, a recess 11 a (see FIGS. 14 and 16 ) formed so that a wall surface 41 h is partially recessed is provided on the inlet portion 11 , and the recess 11 a communicates with the flow path 11 c. As shown in FIG. 14 , an inclined surface 11 b is formed at a boundary portion between the concave portion 11 a and the flow path 11 c. Moreover, as shown in FIG. 16, the outline shape of the recessed part 11a is circular, and as an example, three ribs 43Ra are formed in the recessed part 11a. The ribs 43Ra are formed radially at equal intervals from each other. The rib 43Ra functions to support the front surface of the valve body 25 (details will be described later).

As shown in FIG. 16 , a plurality of support ribs 43Rb for supporting the outer peripheral portion of the valve body 25 are formed around the inlet portion 11 . As an example, six support ribs 43Rb are radially arranged at equal intervals from each other.

As shown in FIG. 11 , as an example, the valve body 25 is disc-shaped and has flexibility (the non-flexible valve body will be described again later). The thickness of the spool may be uniform. The material of the spool can be, for example, silicone rubber. As an example, the hardness of the material of the spool is in the range of 5° to 90°, preferably in the range of 40° to 80°, more preferably in the range of 60° to 80° In the range. The spool 25 has a diameter capable of closing the inlet portion 11 .

As shown in FIG. 18 , the supporting member 21 for pressing the valve element 25 has an annular frame 27 , a substantially tapered (conical) pressing portion 23 arranged at the center of the frame 27 , and a pressing portion 23 and the frame 27 . Four (one example) support arms 26 are connected to support the pressing portion 23 . The pressing part 23 protrudes toward the direction of the valve body 25 , and the pressing part 23 presses the vicinity of the central part of the back surface of the valve body 25 via its tip end.

With such a support method by the support member 21, since the vicinity of the outer peripheral portion of the valve element 25 is not constrained, elastic deformation can be freely performed. Basically, the spool 25 closes the inlet portion 11 as shown in FIG. 12 to prevent the flow of the chemical solution from the valve chamber 10 toward the supply pipe P1 side. On the other hand, when the liquid medicine is supplied from the supply pipe P1 , the liquid medicine is allowed to flow into the valve chamber 10 by elastically deforming the outer peripheral portion of the valve body 25 by the hydraulic pressure of the liquid medicine.

Returning to the description of the supporting member 21 again. As shown in FIG. 18 , the shape of each part of the support member 21 is rounded or tapered so that even if air bubbles are mixed in the valve chamber, the air bubbles can be well discharged out of the valve chamber. Specifically, a gentle rounded shape is formed on the upstream side in the flow direction of each support arm 26 . In addition, the frame 27 also has a tapered shape such that the plate thickness of the frame becomes thinner toward the upstream side in the flow direction. According to such a structure, compared with the case where the cross-sectional shape of the support arm 26 and the frame 27 is a simple rectangle, there exists an advantage that it becomes easy to make air bubbles flow to the downstream side.

In addition, the work of removing air bubbles is not limited. For example, the entire check valve 1 may be raised so that the side of the discharge pipe P2 is positioned upward, and the user may tap the valve lightly with his hand or a predetermined tool. Instead, the air bubbles are driven to the downstream side. When the material of the case 40 is transparent, it is possible to visually confirm whether or not air bubbles remain in the case. In addition, when the downstream side of the valve chamber 10 is formed in a tapered shape whose cross-sectional area gradually decreases toward the outlet portion 13 as in the present embodiment, air bubbles can be driven to the outside well.

As a modified example of the above configuration, each support arm 26 may not have a rounded shape, but may have a tapered cross-sectional shape in which the plate thickness becomes thinner toward the upstream side in the flow direction. In addition, rounded corners may be provided on the frame 27 .

Referring again to FIG. 12 . The supporting member 21 has a structure in which its outer peripheral portion is sandwiched between the case main body 40 and the closing member 30 to be supported. With such a structure, it is not necessary to provide dedicated parts or constructions for fixing the support member 21 . In addition, in order to prevent the supporting member 21 from rotating in the valve chamber 10, as shown in FIGS. 43g fit together.

In addition, in order to prevent air bubbles from stagnating in the valve chamber 10, the shape of the tip of the movable pin 60 also has a predetermined shape in this embodiment, which will be described later.

Next, the movable pin 60 and the structure part in which the movable pin 60 is arrange|positioned are demonstrated. As shown in FIG. 12 , the accommodation space 15 in which the movable pin 60 is arranged is formed by an outer cylinder portion 45 (details will be described later) of the case main body 40 and a cover 70 attached to the outer cylinder portion 45 .

As shown in FIGS. 12 and 19 , the cover 70 is substantially bottomed cylindrical as a whole. The peripheral wall portion 73. One opening is provided in the upper surface part 71, and a part of the movable pin 60 protrudes outside through this opening. As shown in FIG. 19 , on the inner surface of the peripheral wall portion 73 , a convex portion 76 (as an example, a cross-sectional shape is rectangular) is formed. In this example, one convex portion 76 is provided on both sides of the peripheral wall portion 73 .

In the present embodiment, the cover 70 is attached to the case main body 40 with sufficient strength so that the cover 70 and the movable pin 60 do not come off even if a high pressure is applied to the liquid medicine during use. As a method for fixing the cover 70 , for example, an adhesive or welding can be used, but a mechanical fixing method is preferable. As a mechanical fixing method, for example, fitting the convex portion of one member into the concave portion of the other member, screwing the threaded portions together, or fixing the two parts with additional fixing members such as screws or fixing pins. method of a component.

In the present embodiment, as an example, a convex portion 76 (see FIG. 19 ) inside the cover 70 is engaged with an L-shaped groove 45g (see FIG. 14 ) formed on the outer periphery of the outer cylinder portion 45 of the housing. combine. According to such a fixing method, the cover 70 can be fixed with sufficient strength and good positional accuracy. In addition, if necessary, after attaching the cover 70 to the outer cylinder part 45, further fixation with an adhesive agent etc. may be performed.

Next, the movable pin 60 will be described. As shown in FIG. 17 , as an example, the movable pin 60 has a circular cross-sectional shaft portion 61 and a flange portion 67 formed on a part of the shaft portion 61 . An action portion 63 capable of coming into contact with the valve element 25 is formed on the distal end side (lower end side) of the shaft portion 61 .

As shown in FIG. 14, the action|action part 63 is formed in wedge shape so that the outer peripheral part of the valve body 25 can be raised from the wall surface 41h. Specifically, the action portion 63 has a protruding portion 63a inserted between the valve body 25 and the wall surface 41h, and a flat portion 63b formed on the downstream side of the protruding portion 63a. Preferably, the flat portion 63b is configured so that the flat portion 63b is located on the same surface as the upper surface of the valve chamber 10 or on the same surface as the upper surface of the valve chamber 10 when the movable pin 63 is positioned upward as shown by the dotted line in FIG. 14 . The upper surface protrudes. Even if the flat surface 63b is recessed from the upper surface of the valve chamber, air bubbles may stagnate in this portion, but the above-mentioned structure enables the air bubbles to flow well downstream.

Referring again to FIG. 17 , an annular groove 61c into which an O-ring R1 (described in detail later) fits is formed on the shaft portion 61 . The flange portion 67 is formed above the annular groove 61c, and four arc-shaped guide holes 67a are formed in the flange portion 67 . The upper end of the shaft portion 61 is a portion to be pressed by a user or a predetermined mechanism, and the outer peripheral corners of the upper end are rounded.

As shown in FIG. 15 , the movable pin 60 is arranged inside the outer cylindrical portion 45 of the case main body 41 . Inside the outer cylinder 45, an inner cylinder portion 46 is formed. The inner cylinder portion 46 is composed of four wall pieces 46a whose cross-sectional shape is an arc shape. When the movable pin 60 is installed in the outer cylinder part 45, each wall piece 46a will be in the state which penetrated each guide hole 67a of the movable pin. Each wall piece 46a functions as a member that guides the vertical movement of the movable pin 60, and functions to prevent the movable pin 60 from rotating around the central axis.

The movable pin 60 configured as described above is configured to be movable up and down as shown in FIGS. 12 and 13 . First, the state of FIG. 12 in which the movable pin 60 is located at the first position (upper position) will be described.

In this state, the movable pin 60 is lifted upward by the biasing force of the coil spring 68 disposed below the flange portion 67 of the movable pin 60 , and the upper surface of the flange portion 67 is pressed against the cover 70 . of the inner surface. The flange portion 67 is formed to have a diameter larger than that of the opening of the cover 70, so that the movable pin 60 does not come out of the cover. In this embodiment, both the upper surface of the flange part 67 and the inner surface of the cover 70 are flat surfaces, and both members are in surface contact, so the cover 70 can receive the force from the flange part 67 uniformly.

When the movable pin 60 is located at the first position, the action portion 63 of the movable pin 60 is separated from the valve body 25 , and the valve body 25 closes the inlet portion 11 . In this state, the check valve 1 functions as a check valve that only allows the liquid medicine to flow from the supply pipe P1 side to the discharge pipe P2 side. In addition, as described above, the direction in which the liquid medicine flows depends on the pressure of the liquid medicine in the pipes P1 and P2. The chemical solution does not flow when the movable pin 60 is not pressed, and the chemical solution flows from the P2 side toward the P1 side only while the movable pin 60 is pressed. The one-way valve 1 of the present embodiment is not a one-way valve that restricts the flow of the medical solution to a specific direction as such.

On the other hand, in FIG. 13 , the movable pin 60 is pressed downward and moves to the second position (downward position). The movable pin 60 is pressed against the urging force of the coil spring 68, and when the movable pin 60 moves to the position shown in FIG. 13, the action part 63 of the movable pin 60 enters between the valve body 25 and the wall surface 41h (FIG. 14) Then, the outer peripheral portion of the valve element 25 is elastically deformed, thereby opening the inlet portion 11 . As a result, the chemical solution can flow in two directions (which direction the chemical solution flows depends on the hydraulic pressure in P1 and P2 ). When the pressing of the movable pin 60 is stopped in the state of FIG. 13 , the state is as follows: under the action of the biasing force of the coil spring 68, the movable pin 60 returns to the first position again, and the spool 25 returns to its original shape to block the inlet. 11. Valve 1 functions as a one-way valve.

As described above, in the check valve 1 of the present embodiment, by pressing the movable pin 60 , the communication state of the valve can be appropriately switched. The method of pressing the movable pin 1 is not particularly limited. For example, the user may press the movable pin 60 by hand or using a predetermined tool, or may press the movable pin 60 by a predetermined mechanism.

The assembled state of the valve will be additionally described with reference to FIGS. 12 and 13 . By fitting the O-ring R1 into the movable pin 60 , the sealing performance between the movable pin 60 and the inner cylinder portion 46 can be ensured. In the case of such a structure, the force from the O-ring R1 is applied to the inner cylinder portion 46 radially outward, but in this embodiment, as shown in FIG. 13 , the inner cylinder is constituted. The front end of each wall piece 46 a of the portion 46 fits into a locking groove 71 g formed on the inner surface of the upper surface portion 71 of the cover 70 . Therefore, it is possible to prevent the distal end side of the inner cylinder portion 46 from expanding, and as a result, the sealing performance by the O-ring R1 can be maintained well even during use.

The specific material of each component constituting the check valve 1 is not particularly limited, and as an example, the movable pin 60 may be polyacetal resin (POM) having good sliding properties. As an example, the components constituting the case 50 may be polycarbonate resin (PC). In addition, fine convex and concave shapes may be formed on the outer peripheral surface of the valve body 25 (in particular, the surface facing the wall surface 41h) as needed.

As described above, the check valve 1 of the present embodiment can temporarily release the function as a check valve by moving the movable pin 60 . Furthermore, the movable pin 60 is arranged in the accommodation space 15 , and the movable pin 60 is configured so as not to come out from the cover 70 . Therefore, even if the pressure of the liquid medicine increases during use and a large force is applied to the movable pin 60 in the direction of pushing the pin out, the force can be received by the cover 70 through the flange portion 67, so the movable pin 60 Won't fall off. Therefore, the one-way valve 1 of the present embodiment can well cope with high-pressure injection of the medical solution.

In addition, in this embodiment, the cover 70 is fixed to the case 50 using mechanical fixing members ( 45 g , 76 ). Therefore, compared with the case where the cover 70 is fixed using only an adhesive, for example, the cover 70 can be fixed with sufficient strength and positional accuracy.

In addition, in this embodiment, the inlet portion 11 of the valve chamber 10 is formed with the recessed portion 11a as shown in FIG. That is, when such a concave portion 11a is not formed, in order to open the inlet portion 11, the valve body 25 needs to be deformed to the extent that the central flow path 11c is opened. On the other hand, according to the structure of this embodiment, as shown in FIG. 16 , when the outer peripheral portion of the valve body 25 is deformed, the concave portion 11a is opened and the flow path 11c communicating with the concave portion 11a is also opened. Therefore, , the opening and closing of the inlet portion 11 can be performed by slightly deforming the spool 25 .

On the other hand, when the recessed portion 11a is provided in this way, the hydraulic pressure applied to the back surface of the valve element 25 when the valve is used becomes a problem. That is, although the problem differs according to what kind of liquid circuit the valve 1 is used in, it is conceivable that even when the hydraulic pressure in the valve chamber 10 becomes extremely high during use, the effect of the hydraulic pressure Down also presses the spool 25 to the side of the recessed part 11a. In this case, if the support rib 43Ra is not provided in the recessed part 11a, the valve body 25 may be stuck to the recessed part 11a. In this state, even if the action part 63 of the movable pin 60 is pressed between the valve body 25 and the wall surface 41h, the inlet part 11 may not be fully opened. On the other hand, if the supporting rib 43Ra is formed in the concave portion 11a as in the present embodiment, it is possible to prevent the valve body 25 from sticking to the concave portion 11a, so that the inlet portion 11 can be satisfactorily controlled by operating the movable pin 60. Opening and closing. In addition, the support rib 43Ra is not necessarily limited to the shape shown in FIG. 16 , and may be formed as a protrusion of any shape protruding from the bottom of the recessed portion 11 a.

As mentioned above, although one Embodiment of this invention was described referring drawings, this invention is not limited to the said content, Various changes are possible.

For example, an example in which the valve body 25 has flexibility and the outer peripheral portion of the valve body 25 is elastically deformable has been described above, but the valve body 25 may not have flexibility. For example, the valve body may be an inflexible plate-shaped member configured to be displaceable between (a) a position closing the inlet portion 11 and (b) a position opening the inlet portion 11 . When the movable pin 60 is pressed, the valve element is displaced to the position (b), thereby opening the inlet portion 11 . In this case, the support member 21 may be configured such that at least the pressing portion 23 thereof has elasticity, and the pressing portion elastically contracts to allow the displacement of the valve body.

The shape of the pressing portion of the support member is not limited to the conical shape, and may be, for example, a truncated conical shape. By setting it into such a shape, the valve element can be pressed over a larger area.

As long as the cover 70 is fixed to the housing 50 with sufficient strength so that the movable pin 60 does not fall out when the check valve 1 is used, the shape of the cover 70 is not particularly limited, and may be other than a bottomed cylindrical shape. .

The shape of the movable pin 60 is not limited as long as it is a member that is moved by an external force to move the valve element 25 , and may have a shape other than a pin shape. When the movable pin 60 has a pin shape as in the present embodiment, its cross-sectional shape is not limited to a circle, and may be a rectangle, a polygon, or the like. In addition, as the structure for preventing the falling out of the movable pin 60, in the above-mentioned embodiment, the structure in which the flange portion 67 of the movable pin 60 is in contact with the upper surface of the cover 70 was exemplified, but the structure for preventing the falling out is not the same. It is limited to the flange, and may be a simple protrusion or the like provided on the outer periphery of the movable pin. In addition, an additional cover (not shown) may be attached to the protruding portion of the movable pin 60 so that the user can easily press the movable pin 60 by hand.

In the above example, the housing 50 is composed of the housing main body and the closing member 30, but as long as the housing is a member forming the valve chamber 10, the number and shape of the parts are not limited.

The spool 25 is not limited to a circular outline shape, and may have an elliptical, rectangular, polygonal, or other outline shape. In addition, in the above, the thickness of the spool 25 is assumed to be constant, but the thickness of the spool 25 may vary depending on the location.

Other functions of the valve

Furthermore, the one-way valve of other embodiment of this invention may be the following members.

A one-way valve with an opening function, wherein the one-way valve with an opening function includes: a casing, which constitutes a valve chamber with an inlet and an outlet of liquid; a valve core, which is arranged on the valve in a manner to block the inlet. The chamber is configured to be elastically deformable or displaceable in order to open the inlet; the movable member is held on the above-mentioned casing in a movable manner, and abuts against the above-mentioned valve core by moving, so that the valve core is elastically deformation or displacement, when the movable member is pressed, the liquid medicine in an amount corresponding to the amount of movement of the movable member is pushed out of the valve chamber through the outlet.

This valve will be described with reference to FIG. 13 . This valve is configured so that when the movable pin 60 is pressed, a small amount of chemical solution corresponding to the movement amount of the movable pin 60 is pushed out from the valve chamber 10 . On the other hand, when the pressing of the movable pin 60 is stopped, the movable pin 68 returns to the original position under the action of the coil spring 68, and the spool 25 is temporarily deformed so that the liquid medicine can be replenished into the valve chamber 10 again. In this way, the function of pressing out a small amount of medical solution by operating the movable pin 60 is effective, for example, when injecting a contrast agent during a cardiac catheterization. That is, during such an examination, a catheter is inserted into the patient's blood vessel, but when the one-way valve has the above-mentioned function, a small amount of contrast agent can be output from the distal end of the catheter, and as a result, for example, The confirmation of where in the patient the catheter tip is currently located is well performed.

About the PIT type pump unit

In the medical liquid circuit system of the present invention, instead of using the pressurizing member 224 ( FIG. 1 ) for physiological saline, a pump device 226 as shown in FIG. 20 may be used. In FIG. 20, only a part of the chemical liquid circuit system is shown. For the structure downstream of the three-way stopcock 213, the same structure as that in FIG. 1 can be used.

The pump device 226 is, for example, a pump device of the type disclosed in Japanese Patent No. 3626264. The pump device 226 includes a main body 227 on which a small syringe 226a is mounted, and a piston drive mechanism (not shown) for advancing and retreating a piston member of the syringe 226a.

In order to use the pump device 226 to realize the delivery of physiological saline, in the structure of FIG. 20 , a part of the circuit is obtained by changing the circuit of FIG. 1 . Specifically, the connectors 215C and 215D are used instead of the check valves 215A and 215B, and the check valve V-1 is arranged between the two connectors. In addition, as shown by the triangle mark in FIG. 20 , the one-way valve V-1 is disposed so as to allow the flow of the chemical solution to the downstream side and not to allow the flow of the chemical solution in the reverse direction. Similar to the one-way valve V-1, the flow restriction directions of other one-way valves are also determined based on the directions of the triangle marks in FIG. 20 .

On the line 205 connecting the connector 215C and the contrast medium chamber 221, a connection connector 234, an infusion chamber 233, an air sensor 231, and a one-way valve V- 2. In addition, the arrangement of the above-mentioned constituent elements 234, 233, and 231 can be appropriately changed.

The line 206 connecting the connector 215D and the saline chamber 223 is divided into two lines on the way, one of which is the line 206 and the other is the line 209 going toward the pump unit 226 . As shown in FIG. 20 , two check valves V-3 and V-4 are disposed on the line 206 .

One check valve V- 5 is also provided between the connector 215D and the three-way stopcock 213 . In addition, the one-way valve V-5 may also be omitted. When the one-way valve V-5 is provided, the circuit downstream of the one-way valve may be used as a disposable item. Alternatively, regardless of the presence or absence of the check valve V-5, the circuit downstream of the connector 215D is used as a disposable item.

In addition, a drug solution tube (not shown) may be connected to the three-way stopcock 213 , and the drug solution may be injected toward the patient through the drug solution tube.

In the liquid medicine circuit system of FIG. 20 constituted as described above, by operating the pump device 226 to move the piston member of the small syringe 226a back and forth, the following operations can be repeated: (i) from the chamber 223 to the inside of the syringe 226a. The physiological saline is sucked, and (ii) the physiological saline is ejected from the small syringe 226a. Thus, physiological saline can be injected into the patient.

In addition, in the structure of FIG. 20, the load sensor 223S for measuring the weight of the physiological saline chamber 223 is provided as an example. A control device not shown in the figure judges whether the output value of the load sensor 223S or a value after converting the output value into a load is below a predetermined set value (that is, whether the remaining amount of physiological saline is within a certain standard value or not). value below). Then, when it is determined that the value is equal to or less than a predetermined set value, a predetermined warning (for example, lighting of a lamp, display of a message, output of sound or voice, etc.) is issued to the operator.

Of course, the load sensor 223S as described above can also be used in the chemical liquid circuit system of the embodiment shown in FIG. 1 .

In order to omit the air sensor 231 in, for example, the liquid medicine circuit system of FIG. Prevents air from entering the patient line side. In addition, it may be determined based on the position of the spool whether or not the infusion chamber is empty, and when the chamber is empty, control such as stop of injection may be performed.

The chemical liquid circuit system of Fig. 20 is a system having the following liquid circuit set. A medical liquid circuit set, which is applied to angiography, wherein, the liquid circuit set includes: a contrast medium pipeline, which is connected with a contrast medium chamber; a normal saline pipeline, which is connected with the normal saline chamber; a syringe pipeline, which is connected to the syringe; patient pipeline, which is used to deliver contrast medium or saline towards the patient; and a base pipeline part, which is connected to the above-mentioned pipelines, and is connected to the above-mentioned contrast medium pipeline and the above-mentioned normal saline pipeline respectively to form T-shaped, and the liquid circuit set further includes: a, the first valve member (V-1, V-2), which is configured to: (i) when the liquid is sucked toward the upstream side of the above-mentioned base pipeline part In the case where the contrast medium flows from the contrast medium pipeline into the above-mentioned base pipeline part, (ii) when the liquid is squeezed from the upstream side toward the downstream side of the above-mentioned base pipeline part, the liquid passes through the valve member and flows along the b. The second valve member (V-1), when the liquid is squeezed from the upstream side to the downstream side of the above-mentioned base pipeline part, the second valve member (V-1) allows the liquid to flow in this direction The flow in the opposite direction is not allowed; and c, the third valve member (V-3, V-1), when the physiological saline is delivered from the above-mentioned physiological saline chamber by using the member for delivering physiological saline, the third valve member (V-3, V-1) 3 The valve parts (V-3, V-1) allow the flow of physiological saline to the patient line side, but do not allow the flow of physiological saline to the syringe line side.

About Roller Pump Units

A roller pump 470 as shown in FIG. 21 can also be used as a member that pressurizes the chemical solution chamber to send out the chemical solution. As an example, this pump 470 has a pair of pressing members 471 and 472 arranged to sandwich the chamber 223 . By bringing one of the pressing members 471 , 472 close to the other pressing member, the chamber 223 between the two members 471 , 472 can be pressed, thereby allowing the medicine inside the chamber 223 to be pumped out.

The specific structure can be appropriately designed or even changed. As an example, two components can also be connected at the hinge part 474, and one component can rotate relative to the other. Rollers 476 may also be provided in order to bring one component closer to the other. The roller 476 may be configured to move downward as shown by the arrow in the figure while rotating around the rotation center 476a (the driving source may or may not be provided), thereby pressing the pressing member 471 toward the other member 472 .

About the piston type pump device

In addition, a piston type pump 480 as shown in FIG. 22 can also be used. The pump 480 has two syringes 481 and 486 connected in series, and the tip of the front syringe 481 is connected to the pipeline 209 (see FIG. 20 ). A slidably short spacer 482a is arranged inside the front syringe 481, and a protrusion 485 is formed on the back surface of the spacer 482a. The protrusion 485 functions to limit the movable range when the spacer 482a moves backward, but the protrusion 485 does not necessarily have to be formed.

The distal end of the rear syringe 486 is formed elongated so that it can be inserted into a through hole formed in the sealing member 482b of the front syringe 481 . Thus, the liquid or gas in the rear syringe 486 can be transported into the front syringe 481 and the liquid or gas can be sucked from the syringe 481 . In addition, the pump 480 is also provided with a drive unit (not shown) for moving the piston member of the rear syringe 486 forward and backward.

In the medical solution circuit system of the present invention, as described above, the pump device 480 of the type shown in FIG. 22 can also be used to perform suction and injection of physiological saline.

Other configurations of release valves

As the relief valves 202A and 202B of FIG. 1 , a relief valve having a structure as shown in FIG. 23 can also be used. In addition, it should be noted that in FIG. 23 (and FIG. 24 described later), a part of the structure is schematically depicted.

The release valve 401A of FIG. 23 has, as members constituting the casing 410, a hollow main body member 411, a pipe connection member 412 connected to the lower portion of the main body member 411, and a cover member 413 for closing the upper end opening of the main body member 411. . In addition, a shaft member 425 is arranged so as to be movable upward and downward inside the main body member 411 . The shaft member 425 is provided with two seal members 428 , 429 , and a flange portion 425 f is formed on a part of the shaft member 425 .

The shaft member 425 is urged upward by the coil spring S1 ( FIG. 23 ), and the flange portion 425 f is pressed against the seal member 429 in this state. In this state, the fluid does not flow from the lower end opening 412 a of the connection member 412 toward the side opening 411 a of the main body member 411 (or the opposite direction).

On the other hand, when the end portion of the shaft member 425 protruding upward from the center portion of the cover member 413 is pressed, the flange portion 425f moves downward, thereby opening a fluid flow path (detailed structure not shown). Accordingly, the fluid can flow from the lower end opening 412 a of the connection member 412 toward the side opening 411 a of the main body member 411 (or the opposite direction). In addition, for the flow path of the fluid, for example, a part of the flow path may be formed by a groove formed on the outer peripheral portion of the shaft member 425 along the longitudinal direction of the shaft member 425 .

As described above, the release valve 401A shown in FIG. 23 can also be used in the chemical solution circuit system of the present invention.

Besides, a relief valve 401B as shown in FIG. 24 may also be used. The release valve 401B of FIG. 24 has a hollow main body member 411 as members constituting the housing 410 , and a cover member 413 for closing the upper end opening of the main body member 411 . Inside the main body member 411, a shaft member 425 is disposed so as to be movable upward and downward. One seal member 429 and an O-ring R1 are provided on the shaft member 425 . A pressing member 416 having a flow path formed therein is attached to an upper end of a shaft member 425 protruding upward from the cover member 413 . The pressing member 416 has a side opening 416a constituting a fluid inlet and outlet.

Similarly, in the release valve 401B thus constituted, the flange portion 425f is pressed against the seal member 429 by the urging force of the coil spring S1 in the state where the shaft member 425 is not pressed, and as a result, the fluid does not flow. It flows from the lower end opening 411a toward the side opening 416a of the pressing member 416 (or the opposite direction). On the other hand, when the lid member shaft member 425 is pressed, a fluid flow path (detailed structure is not shown) is opened, whereby the fluid can flow.

other structures

An example of the present invention has been described above with reference to the drawings, but various conventionally known structures, devices, and facilities can be applied to the circuit system of the present invention. For example, in order to prevent air bubbles from being injected into the patient, a structure called an octopus tube (Japanese: タコ tube) can also be installed at an arbitrary position in the circuit. As an example, in the structure of FIG. 1 , an octopus tube may also be provided between the connector 217 and the air sensor 232 . In addition, the "octopus tube" refers to a protruding part (the external shape can be of any shape) formed hollow inside, like the head of an octopus, and is used to catch air bubbles flowing in the fluid circuit. Therefore, it is preferable that the octopus tube is arranged so as to protrude vertically upward. In addition, in order not to change the posture of the octopus tube, it is preferable to install the octopus tube in a position where the direction of the pipeline (pipe) is stable in the circuit system.

Explanation of reference signs

1. One-way valve; 200, liquid circuit system; 201, liquid circuit set; 202A, 202B, release valve; 203, movable component; 205, contrast medium pipeline; 206, physiological saline pipeline; 207, converter pipeline; 208 , patient pipeline; 209, pipeline; 210, base pipeline; 213, three-way stopcock; 215A, 215B, double check valve; 215C, 215D, connector; 223, saline chamber; 223S, sensor; 226 , pump device; 226a, syringe; 227, main body; 231, 232, air sensor; 251, syringe; 260, injector; 270, converter; 300, switcher; 301, driving part; 332, air sensor; , 401B, release valve; 410, shell; 411, main component; 412, pipe connection component; 413, cover component; 428, 429, sealing component; 470, roller pump; 476, roller; 480, piston pump; 481, 486. Syringe; V-1-V-5, one-way valve; S1, coil spring.

Claims (8)

1. a therapeutic medical fluid loop is set with, and it is applied to angiography, wherein,

This fluid loop suit includes:

Contrast agent pipeline, it is connected with contrast agent chamber；

Normal saline pipeline, it is connected with normal saline chamber；

Syringe pipeline, it is connected with syringe；

Patient line, it is for carrying contrast agent or normal saline towards patient；And

Base portion pipeline portion, it is connected with above-mentioned contrast agent pipeline, normal saline pipeline, syringe pipeline and Patient line, and connects into T-shaped respectively with above-mentioned contrast agent pipeline and above-mentioned normal saline pipeline,

Further, this fluid loop suit also includes:

1st valve member, it is configured at the connecting portion between above-mentioned contrast agent pipeline and above-mentioned base portion pipeline portion, 1st valve member is configured to, i () is in the case of liquid has been aspirated by the upstream side towards above-mentioned base portion pipeline portion, contrast agent flows in the upstream in above-mentioned base portion pipeline portion in contrast agent pipeline, (ii) in the case of liquid has been extruded towards downstream by the upstream side from above-mentioned base portion pipeline portion, liquid is flowed towards the direction in downstream to the upstream side from above-mentioned base portion pipeline portion by the 1st valve member；

2nd valve member, it is configured at the connecting portion between above-mentioned normal saline pipeline and above-mentioned base portion pipeline portion, 2nd valve member is configured to, in the case of liquid has been extruded towards downstream by the upstream side from above-mentioned base portion pipeline portion or in the case of liquid has been extruded towards the 2nd valve member side from above-mentioned saline tube line side, liquid flows to the upstream side from above-mentioned base portion pipeline portion towards the direction in downstream or flows towards the direction of the 2nd valve member side to from above-mentioned saline tube line side；And

1st relief valve, it has movable link and is configured on above-mentioned normal saline pipeline, for above-mentioned normal saline pipeline being carried out opening and closing by making above-mentioned movable link move,

In the case of liquid has been aspirated by the upstream side towards above-mentioned base portion pipeline portion, above-mentioned 1st valve member and the 2nd valve member limit liquid and flow to upstream side from downstream.

Fluid loop the most according to claim 1 is set with, wherein,

Above-mentioned 1st relief valve is configured to, and at above-mentioned movable link by from outside pressing, makes above-mentioned normal saline move to above-mentioned base pipe line portion effluent.

Fluid loop the most according to claim 1 and 2 is set with, wherein,

This fluid loop suit also includes:

Changer pipeline, its one end is connected with changer and the other end is connected with above-mentioned base portion pipeline portion；And

2nd relief valve, it has movable link and is arranged on this changer pipeline, for this changer pipeline being carried out opening and closing by making the above-mentioned movable link of the 2nd relief valve move.

Fluid loop the most according to claim 1 and 2 is set with, wherein,

It is provided with drop chamber at least one pipeline in above-mentioned contrast agent pipeline and above-mentioned normal saline pipeline.

5. a fluid loop system, wherein,

This fluid loop system includes:

Therapeutic medical fluid loop suit described in claim 1 or 2；

Infusion appliance, it is can will keep this syringe in the way of the syringe dismounting that this fluid loop suit is connected, and makes the piston component of this syringe move and carry out injection and the suction of liquid；And

Switch, it is for keeping the part that aforesaid liquid loop is set with, and has the driver part of above-mentioned movable link action for making at least the above 1st relief valve.

Fluid loop system the most according to claim 5, wherein,

The above-mentioned driver part of above-mentioned switch has basis and carries out the driving source of action from outside control signal.

Fluid loop system the most according to claim 6, wherein,

Above-mentioned driving source is motor.

8. according to the fluid loop system described in claim 5 or 6, wherein,

Above-mentioned switch also has the air borne sensor of the bubble in detecting above-mentioned Patient line.