CN221730689U - Auxiliary device and surgical instrument for short-term percutaneous ventricular intervention surgery - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, and provides an auxiliary device and a surgical instrument for short-term percutaneous ventricular intervention operation, wherein the auxiliary device comprises: the catheter seat is provided with a connector which is suitable for being connected with a reducer pipe of the interventional catheter; the elastic hemostatic valve plate is arranged in the inner cavity of the catheter seat so as to seal the inner cavity of the catheter seat relative to the external environment; the elastic hemostatic valve plate is provided with a notch. According to the auxiliary device, the connector of the catheter seat is inserted into the reducer, the connector and the reducer can ensure the matched tightness in an interference fit mode, and blood leaked through the reducer is limited in the inner cavity of the catheter seat and cannot leak outwards; in addition, as the guide wire is tightly wrapped when passing through the incision, blood in the inner cavity of the catheter seat can not permeate outwards from the incision, thereby effectively solving the problem that a large amount of blood leaks at the tail end of the reducer in the interventional catheter operation process.

Description

Auxiliary device and surgical instrument for short-term percutaneous ventricular intervention surgery

Technical Field

The utility model relates to the technical field of medical instruments, and in particular to an auxiliary device and a surgical instrument for short-term percutaneous ventricular intervention surgery.

Background Art

In the prior art, an interventional catheter is usually used in the interventional surgery of short-term percutaneous ventricular assist devices (such as a micro percutaneous interventional catheter pump). The interventional catheter includes a long catheter body, a catheter TIP arranged at the distal end of the long catheter body, a two-way valve arranged on the long catheter body, and a reducer arranged at the proximal end of the long catheter body, wherein the catheter TIP is also provided with a suction side hole. During the catheter interventional surgery, after the TIP head end enters the femoral artery along the guide wire, since the blood pressure in the body is greater than the extracorporeal pressure, the blood in the human femoral artery will flow into the inner cavity of the long catheter through the suction side hole and the two-way valve. At the same time, since the inside of the long catheter and the reducer need to be transported to the body through the guide wire, it is impossible to directly use a hemostatic forceps to clamp at the reducer for hemostasis, which eventually leads to a large amount of blood leakage at the tail end of the reducer.

Utility Model Content

Therefore, the technical problem to be solved by the present invention is that a large amount of blood leakage occurs at the tail end of the reducer during the interventional catheter surgery in the prior art, thereby providing an auxiliary device and surgical instrument for short-term percutaneous ventricular interventional surgery.

In order to solve the above technical problems, the technical solution of the utility model is as follows:

The utility model provides an auxiliary device for short-term percutaneous ventricular interventional surgery, comprising: a catheter seat, on which a joint is arranged, and the joint is suitable for being connected to a reducer of an interventional catheter; an elastic hemostatic valve sheet, which is arranged in the inner cavity of the catheter seat to seal the inner cavity of the catheter seat relative to the external environment; an incision is arranged on the elastic hemostatic valve sheet; wherein, when a guide wire enters the inner cavity of the catheter seat from the joint and passes through the incision from the catheter seat, the incision can tightly wrap the guide wire to limit the blood in the catheter seat from leaking from the incision.

Furthermore, the auxiliary device for short-term percutaneous ventricular intervention surgery also includes a core tube; the distal end of the core tube is inserted into the catheter seat through the incision and passes out through the connector, and the part of the core tube passing out of the connector is used to be inserted into the interventional catheter to form support for the interventional catheter; wherein, when the core tube passes through the incision, the incision can tightly wrap the core tube to limit the blood in the catheter seat from leaking from the incision.

Furthermore, when the core tube is inserted into the interventional catheter, the distal end of the core tube at least partially extends out from the distal end of the interventional catheter.

Furthermore, the auxiliary device for short-term percutaneous ventricular intervention surgery also includes a core seat; the core seat is arranged at the end of the catheter seat away from the connector, and the end of the core seat away from the catheter seat is provided with a Luer connector; the lumen of the core tube is used for passing a guide wire, and the proximal end of the core tube at least partially remains in the inner cavity of the core seat, so that the blood flowing out through the proximal end of the core tube is confined to the inner cavity of the core seat.

Furthermore, a limit pin is provided at one end of the core seat facing the catheter seat, and a limit groove matched with the limit pin is provided on the catheter seat; when the core seat is connected to the catheter seat, the limit pin is inserted in the limit groove, and the limit pin can rotate in the limit groove, so that the core seat and the catheter seat are in a state of mutual locking or mutual unlocking.

Furthermore, the catheter seat includes a seat body and an upper cover; the seat body has a hollow inner cavity, the connector is arranged on the seat body and communicates with the inner cavity of the seat body; the elastic hemostatic valve sheet is pressed against one end of the seat body away from the connector through the upper cover; the limiting groove is arranged on the end surface of the upper cover facing the core seat.

Furthermore, the auxiliary device for short-term percutaneous ventricular intervention surgery also includes a first valve body and a first pipeline; one end of the first pipeline is connected to the inner cavity of the catheter seat, and the other end is used to connect to a liquid source for flushing; the first valve body is arranged on the first pipeline.

Furthermore, the auxiliary device for short-term percutaneous ventricular intervention surgery also includes a second valve body and a second pipeline; one end of the second pipeline is connected to the inner cavity of the core seat, and the other end is used to be connected to the liquid source for flushing; the second valve body is arranged on the second pipeline.

Furthermore, both the first valve body and the second valve body are valve bodies having multiple interfaces.

On the other hand, the utility model provides a surgical instrument, including any of the auxiliary devices for short-term percutaneous ventricular interventional surgery described above, and also including: an interventional catheter, the reducer of the interventional catheter is connected to the connector by interference fit.

The technical solution of the utility model has the following advantages:

The utility model provides an auxiliary device for short-term percutaneous ventricular interventional surgery. The interior of the catheter seat is provided with an elastic hemostatic valve sheet, so that the inner cavity of the catheter seat is sealed relative to the external environment. During the catheter interventional surgery, the connector of the catheter seat is inserted into the reducer, and the two can ensure the sealing of the fit by interference fit. The blood leaking through the reducer is confined in the inner cavity of the catheter seat and cannot leak out. Moreover, an incision is provided on the elastic hemostatic valve sheet, which can allow the guide wire to pass through, so that the interventional catheter can enter the body along the guide wire. Since the guide wire is tightly wrapped when passing through the incision, the blood in the inner cavity of the catheter seat will not penetrate outward from the incision, thereby effectively solving the problem of a large amount of blood leakage at the tail end of the reducer during the interventional catheter surgery.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of an auxiliary device for short-term percutaneous ventricular intervention surgery in one embodiment of the utility model;

FIG2 is a schematic diagram of an interventional catheter in a surgical instrument in an embodiment of the present invention;

FIG3 is a schematic diagram of an interventional catheter and an auxiliary device in a surgical instrument in an embodiment of the present invention after being combined;

FIG4 is a schematic diagram of a connector in an auxiliary device for short-term percutaneous ventricular intervention surgery in one embodiment of the utility model;

FIG5 is a schematic diagram of an elastic hemostatic valve sheet in an auxiliary device for short-term percutaneous ventricular intervention surgery in one embodiment of the utility model;

FIG6 is a schematic diagram of a catheter adapter in an auxiliary device for short-term percutaneous ventricular intervention surgery in one embodiment of the utility model;

FIG7 is a front schematic diagram of FIG6 ;

FIG8 is a schematic diagram of the back side of FIG6 ;

FIG9 is a schematic diagram of a core seat in an auxiliary device for short-term percutaneous ventricular intervention surgery in one embodiment of the utility model;

FIG10 is a front view of FIG9 ;

FIG. 11 is a schematic diagram of a core seat and a catheter seat in an auxiliary device for short-term percutaneous ventricular intervention surgery in an embodiment of the present invention after being combined.

1. Catheter seat; 2. Core tube; 3. Core seat; 4. Luer nut; 5. First pipeline; 6. First valve body; 7. Second pipeline; 8. Second valve body; 9. Conical tip; 10. Catheter TIP; 11. Two-way valve; 12. Reducer; 13. Suction side hole; 14. Long catheter body; 15. Connector; 16. Upper cover; 17. Elastic hemostatic valve sheet; 18. Limiting groove; 19. Limiting pin; 20. Seat body.

DETAILED DESCRIPTION

The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

It should be noted that in order to more clearly describe the technical solution in this application, the "distal end" in this application refers to the end close to the patient, and the "proximal end" refers to the end away from the patient. For example, for an interventional catheter, its distal end enters the patient's body first.

As shown in Fig. 1 to Fig. 5, the present embodiment provides an auxiliary device for short-term percutaneous ventricular interventional surgery, including: a catheter seat 1, the catheter seat 1 has a hollow inner cavity, a connector 15 is provided on the catheter seat 1, the connector 15 can be a hollow cylinder or a cone, the connector 15 is used to connect with the reducer 12 of the interventional catheter, when in use, the connector 15 can be inserted in the reducer 12. An elastic hemostatic valve sheet 17 is provided in the inner cavity of the catheter seat 1, for example, the end of the catheter seat 1 away from the connector 15 can be an open structure, and the elastic hemostatic valve sheet 17 is flatly fixed at the opening along the axial direction perpendicular to the catheter seat 1 to block the opening, so that the inner cavity of the catheter seat 1 is sealed relative to the external environment. For example, the elastic hemostatic valve sheet 17 can be made of silicone, which has a certain elasticity. An incision is provided on the elastic hemostatic valve sheet 17. When the guide wire enters the inner cavity of the catheter seat 1 from the connector 15 and passes through the incision from the catheter seat 1, the incision can tightly wrap the guide wire to limit the blood in the catheter seat 1 from leaking from the incision.

The auxiliary device for short-term percutaneous ventricular interventional surgery provided in this embodiment is provided with an elastic hemostatic valve sheet 17 inside the catheter seat 1, so that the inner cavity of the catheter seat 1 is sealed relative to the external environment. During the catheter interventional surgery, the connector 15 of the catheter seat 1 is inserted into the reducer 12, and the two can ensure the sealing of the fit by interference fit. The blood leaked through the reducer 12 is confined in the inner cavity of the catheter seat 1 and cannot leak outward; moreover, an incision is provided on the elastic hemostatic valve sheet 17, which can allow the guide wire to pass through, so that the interventional catheter can enter the body along the guide wire, and because the guide wire is tightly wrapped when passing through the incision, the blood in the inner cavity of the catheter seat 1 will not penetrate outward from the incision, thereby effectively solving the problem of a large amount of blood leakage at the tail end of the reducer 12 during the interventional catheter surgery.

Among them, the auxiliary device for short-term percutaneous ventricular intervention surgery also includes a core tube 2; the distal end of the core tube 2 is inserted into the catheter seat 1 through the incision and passes through the connector 15, and the part of the core tube 2 passing through the connector 15 is used to be inserted into the interventional catheter to provide support for the interventional catheter.

Since the interventional catheter needs to pass through the aortic arch along the guide wire and then be delivered to the heart, the bending radius of the aortic arch is small when passing through the aortic arch, and the interventional catheter has the characteristics of large inner diameter and thin wall thickness. When the bending degree is large, it is easy to bend, which affects the physical properties of the interventional catheter. Therefore, the core tube 2 can play a certain supporting role inside the interventional catheter to prevent the interventional catheter from bending when passing through the aortic arch.

It should be noted that the hardness of the core tube 2 is greater than that of the interventional catheter, which is beneficial to improving the support effect, but the harder the better. It should also be ensured that the core tube 2 has good bending performance and does not affect the resistance of the interventional catheter when passing through the arch.

When the core tube 2 passes through the incision, the incision can tightly wrap the core tube 2 to limit the blood in the catheter adapter 1 from leaking from the incision. For example, the elastic hemostatic valve sheet 17 can be provided with one incision, in which case the core tube 2 and the guide wire can share one incision. For example, the elastic hemostatic valve sheet 17 can also be provided with two incisions, and the core tube 2 and the guide wire can also use different incisions.

For example, the core tube 2 can be a solid tube body or a hollow tube body. When the core tube 2 is a solid tube body, the blood in the body can be prevented from leaking outwards through the core tube 2. When the core tube 2 is a hollow tube body, a guide wire can be passed through the core tube 2. At this time, the guide wire does not directly contact the inner wall of the interventional catheter after penetrating the core tube 2, and the inner wall of the interventional catheter can be protected from being scratched. However, blood easily leaks outwards from the near end of the core tube 2 at this time, and the means to solve this defect will be provided in subsequent embodiments.

When the core tube 2 is inserted into the interventional catheter, the distal end of the core tube 2 at least partially extends from the distal end of the interventional catheter. This arrangement allows the entire section of the interventional catheter to be effectively supported, and also facilitates the insertion of the guide wire into the core tube 2. Moreover, the distal end of the core tube 2 may be a tapered tip 9 to facilitate the smooth advancement of the interventional catheter in the body.

The auxiliary device for short-term percutaneous ventricular interventional surgery also includes a core seat 3; the core seat 3 is arranged at the end of the catheter seat 1 away from the connector 15, and the end of the core seat 3 away from the catheter seat 1 is provided with a Luer connector; the lumen of the core tube 2 is used to pass the guide wire, and the proximal end of the core tube 2 is at least partially left in the inner cavity of the core seat 3, so that the blood flowing out through the proximal end of the core tube 2 is confined in the inner cavity of the core seat 3. When in use, the guide wire is passed through the distal end of the core tube 2, and the Luer nut 4 on the Luer connector at the tail end of the core seat 3 is removed, so that the guide wire can pass through the tail end of the core seat 3, and then the intervention catheter, the core tube 2, the catheter seat 1 and the core seat 3 are transported together along the guide wire until the intervention catheter reaches the predetermined position of the left ventricle, and then the guide wire is withdrawn.

As shown in FIGS. 6 to 11 , a limiting pin 19 is provided at one end of the core seat 3 facing the catheter seat 1. For example, two limiting pins 19 can be provided at intervals on the edge side wall of the end of the core seat 3. A limiting groove 18 matching the limiting pin 19 is provided on the catheter seat 1. When the core seat 3 is connected to the catheter seat 1, the limiting pin 19 is inserted into the limiting groove 18, and the limiting pin 19 can rotate in the limiting groove 18, so that the core seat 3 and the catheter seat 1 are in a mutually locked or mutually unlocked state. For example, when the limiting pin 19 rotates 90° clockwise along the limiting groove 18, the core seat 3 and the catheter seat 1 are locked. Conversely, when the limiting pin 19 rotates 90° counterclockwise along the limiting groove 18, the core seat 3 and the catheter seat 1 are unlocked. At this time, the core seat 3 can be removed from the catheter seat 1.

When in use, after the interventional catheter is introduced into place, the core seat 3 and the catheter seat 1 are unlocked, and then the core tube 2 is pulled outward until the distal end of the core tube 2 is located at the proximal end of the reducer 12. At this time, the middle position of the reducer 12 can be clamped with hemostatic forceps, and then the catheter seat 1 can be withdrawn.

The catheter seat 1 may be composed of a seat body 20 and an upper cover 16; the seat body 20 has a hollow inner cavity, the connector 15 is arranged on the seat body 20 and communicates with the inner cavity of the seat body 20; the elastic hemostatic valve sheet 17 is pressed against the end of the seat body 20 away from the connector 15 through the upper cover 16; the limiting groove 18 is arranged on the end surface of the upper cover 16 facing the core seat 3. For example, the seat body 20 and the upper cover 16 may be made of the same polymer material, and the two are welded into one body using an ultrasonic welding process. Before welding, an elastic hemostatic valve sheet 17 is pre-placed between the seat body 20 and the upper cover 16, and an incision is made on the elastic hemostatic valve sheet 17 in advance. The upper cover 16 and the seat body 20 press the elastic hemostatic valve sheet 17 and then complete ultrasonic welding to ensure the sealing effect here.

The auxiliary device for short-term percutaneous ventricular interventional surgery further includes a first valve body 6 and a first pipeline 5; one end of the first pipeline 5 is connected to the inner cavity of the catheter adapter 1, and the other end is used to connect to a liquid source for flushing, for example, the liquid source can be physiological saline; the first valve body 6 is arranged on the first pipeline 5. When the core tube 2 passes through the connector 15, the two are clearance-matched, so that the physiological saline entering the inner cavity of the catheter adapter 1 can enter the space between the outer wall of the core tube 2 and the inner wall of the interventional catheter through the gap between the core tube 2 and the connector 15.

Similarly, the auxiliary device for short-term percutaneous ventricular intervention surgery also includes a second valve body 8 and a second pipeline 7; one end of the second pipeline 7 is connected to the inner cavity of the core seat 3, and the other end is used to be connected to the liquid source for flushing; the second valve body 8 is arranged on the second pipeline 7.

When in use, physiological saline can be first injected into the first pipeline 5 connected to the catheter seat 1 through the first valve body 6 to flush and exhaust the inside of the interventional catheter, and then physiological saline can be injected into the second pipeline 7 connected to the core seat 3 through the second valve body 8 to flush and exhaust the inside of the core tube 2. This arrangement can prevent the formation of gas embolism in the patient's body during interventional surgery, which is conducive to improving the safety of the surgery.

It should be noted that, in some embodiments, only the first pipeline 5 and the first valve body 6 may be used to flush and exhaust the inside of the interventional catheter. Similarly, in some embodiments, only the second pipeline 7 and the second valve body 8 may be used to flush and exhaust the inside of the core tube 2. Similarly, in some embodiments, the first pipeline 5 and the first valve body 6 may be used to flush and exhaust the inside of the interventional catheter, and at the same time, the second pipeline 7 and the second valve body 8 may be used to flush and exhaust the inside of the core tube 2.

The first valve body 6 and the second valve body 8 may both be valve bodies with multiple interfaces. For example, the first valve body 6 and the second valve body 8 may both be three-way valves.

Another embodiment provides a surgical instrument, including any of the above-mentioned auxiliary devices for short-term percutaneous ventricular interventional surgery, and also including: an interventional catheter, the interventional catheter including a long catheter body 14, a catheter TIP10 arranged at the distal end of the long catheter body 14, a two-way valve 11 arranged on the long catheter body 14, and a reducer 12 arranged at the proximal end of the long catheter body 14, wherein the catheter TIP10 is also provided with a suction side hole 13; the reducer 12 of the interventional catheter is connected to the joint 15 by interference fit.

The whole implantation technology is introduced:

Use a suture device to perform femoral artery puncture (vascular pre-exposure technique). Insert an 18Fr vascular sheath, and then give heparin (anticoagulant). Use a pigtail catheter to pass through the aortic valve, and then shape the guide wire and transport it to the apex of the left ventricle along the pigtail catheter. At this time, the interventional catheter and the auxiliary device are taken out and assembled into the state shown in Figure 3 and locked, and then the catheter seat 1 and the core seat 3 are flushed and exhausted with physiological saline. Withdraw the pigtail catheter, then insert the guide wire into the distal end of the core tube 2, remove the Luer nut at the tail end of the core seat 3, so that the guide wire can pass through the tail end of the core seat 3, and then allow the interventional catheter and the auxiliary device to be transported along the guide wire together until the interventional catheter reaches the predetermined position of the left ventricle, and withdraw the guide wire. After introduction, unlock the core seat 3 and the catheter seat 1, pull out the core tube 2 until the distal end of the core tube 2 is at the tail end position of the reducer 12, clamp it with a hemostatic forceps at the middle position of the reducer 12, and withdraw the entire auxiliary device. Finally, connect other control devices to the tail end of the reducer 12.

In summary, the auxiliary device for short-term percutaneous ventricular interventional surgery in the present application has the functions of supporting instruments, protecting pipelines, flushing pipelines, and sealing and stopping bleeding.

Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims (10)

1. An auxiliary device for short-term percutaneous ventricular intervention, comprising:

A catheter hub provided with a connector adapted to be connected to a reducer of an interventional catheter;

The elastic hemostatic valve plate is arranged in the inner cavity of the catheter seat so as to seal the inner cavity of the catheter seat relative to the external environment; the elastic hemostatic valve plate is provided with a notch;

Wherein, when the guide wire enters the inner cavity of the catheter seat from the joint and passes out of the catheter seat through the incision, the incision can tightly wrap the guide wire so as to limit the leakage of blood in the catheter seat from the incision.

2. An auxiliary device for short-term percutaneous ventricular intervention as claimed in claim 1, wherein,

The device also comprises a core tube;

The distal end of the core tube is inserted into the catheter seat through the incision and passes out through the joint, and the part of the core tube passing out of the joint is used for being inserted into an interventional catheter to form a support for the interventional catheter;

Wherein the slit is capable of tightly wrapping the core tube when the core tube passes through the slit to limit leakage of blood in the catheter hub from the slit.

3. An auxiliary device for short term percutaneous ventricular intervention as claimed in claim 2, wherein,

The distal end of the core tube extends at least partially from the distal end of the interventional catheter when the core tube is inserted therein.

4. An auxiliary device for short term percutaneous ventricular intervention as claimed in claim 2, wherein,

The device also comprises a core seat;

The core seat is arranged at one end of the catheter seat far away from the connector, and a luer connector is arranged at one end of the core seat far away from the catheter seat;

The lumen of the core tube is for passage through a guidewire and the proximal end of the core tube is at least partially retained within the lumen of the core housing such that blood flowing through the proximal end of the core tube is confined within the lumen of the core housing.

5. The auxiliary device for short-term percutaneous ventricular intervention as claimed in claim 4, wherein,

A limiting pin is arranged at one end, facing the guide tube seat, of the core seat, and a limiting groove matched with the limiting pin is arranged on the guide tube seat;

When the core seat is connected with the catheter seat, the limiting pin is inserted into the limiting groove, and the limiting pin can rotate in the limiting groove, so that the core seat and the catheter seat are in a mutually locked or mutually unlocked state.

6. The auxiliary device for short-term percutaneous ventricular intervention as claimed in claim 5, wherein,

The catheter seat comprises a seat body and an upper cover;

The connector is arranged on the base body and is communicated with the inner cavity of the base body;

The elastic hemostatic valve plate is pressed at one end of the seat body, which is far away from the joint, through the upper cover;

The limiting groove is arranged on the end face of the upper cover, which faces the core seat.

7. An auxiliary device for short-term percutaneous ventricular intervention as claimed in claim 1, wherein,

The valve further comprises a first valve body and a first pipeline;

one end of the first pipeline is communicated with the inner cavity of the catheter seat, and the other end of the first pipeline is connected with a liquid source for flushing;

The first valve body is arranged on the first pipeline.

8. The auxiliary device for short-term percutaneous ventricular intervention as claimed in claim 7, wherein,

The valve further comprises a second valve body and a second pipeline;

One end of the second pipeline is communicated with the inner cavity of the core seat, and the other end of the second pipeline is connected with a liquid source for flushing;

The second valve body is arranged on the second pipeline.

9. An auxiliary device for short term percutaneous ventricular intervention as claimed in claim 7 or 8, wherein,

The first valve body and the second valve body are both valve bodies with a plurality of interfaces.

10. A surgical instrument comprising the auxiliary device for short-term percutaneous ventricular intervention of any of claims 1-9, further comprising:

The reducer pipe of the intervention catheter is connected with the joint in an interference fit mode.