Direction-variable puncture suite

Abstract

The invention discloses a direction-variable puncture suite, and relates to the technical field of medical instruments. In order to solve the problem that the bending angle of a puncture needle cannot be adjusted in real time due to the fact that an existing puncture suite is of a linear type or a fixed bending angle type, the following technical scheme is provided: the puncture suite comprises a puncture guider, a direction adjusting unit, a puncture unit and a puncture needle suite. The tail end of the puncture guider is connected with the direction adjusting unit, the puncture unit is connected with the puncture needle suite, and the puncture unit and the puncture needle suite are arranged in the puncture guider. The head end of the puncture guider can be bent by 0-90 degrees through traction of the traction piece, and the direction adjusting unit indicates and sets the puncture angle of the puncture guider. The puncture unit limits the puncture depth of the puncture guider and pushes the puncture needle suite to advance along the puncture guider for puncture. Real-time angle adjustment from 0 degree to 90 degrees can be achieved, accurate setting of the puncture angle is ensured, and puncture accuracy and safety are improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a variable-direction puncture kit. Background Art

[0002] In the field of clinical medicine, percutaneous insertion of a puncture needle under image guidance to establish a shunt between two organs, such as portosystemic shunt, splenorenal shunt, gastrojejunal shunt, etc., has become an important technical means for treating specific diseases. This type of treatment aims to achieve effective drainage and shunt of fluid or blood between two organs by direct puncture and insertion of a tube, thereby improving the patient's physiological function and alleviating disease symptoms.

[0003] However, in actual operation, the existing puncture kit design has technical limitations, which affects the accuracy, efficiency and safety of the puncture. The puncture kits widely used in the current market are mostly linear or fixed bending angle types. When faced with complex and changeable anatomical structures and changes in respiratory movement, linear puncture kits cannot adapt to the curved paths between organs, and although the fixed bending angle type can improve the path adaptability to a certain extent, it lacks flexibility and is difficult to meet personalized puncture needs.

[0004] During the puncture process, after the puncture needle enters the first organ, the puncture angle needs to be accurately adjusted according to the position of the puncture target on the second organ and the real-time changes in respiratory movement. However, the existing puncture kit cannot adjust the bending angle of the puncture needle in real time, which often requires doctors to make multiple attempts during the operation. This not only increases the difficulty and number of punctures, but also, since the puncture angle cannot be adjusted in real time, doctors often rely on experience and feel during the operation, making it difficult to ensure that the puncture needle can accurately reach the target position. This not only reduces the accuracy of the puncture, but may also increase the risk of accidentally puncturing other tissues or blood vessels, leading to serious complications such as bleeding and pneumothorax. Summary of the invention

[0005] The purpose of the present invention is to provide a variable-direction puncture kit to solve the problem that the existing puncture kit is of a linear type or a fixed bending angle type, and the bending angle of the puncture needle cannot be adjusted in real time, which increases the puncture difficulty, the number of punctures, the puncture time and puncture-related complications, and reduces the puncture accuracy.

[0006] The technical solution of the present invention to solve the above technical problems is as follows:

[0007] A variable direction puncture kit includes a puncture guide, a direction adjustment unit, a puncture unit and a puncture needle kit. The tail end of the puncture guide is connected to the direction adjustment unit, the puncture unit is connected to the puncture needle kit, and the puncture unit and the puncture needle kit are respectively arranged inside the puncture guide;

[0008] The head end of the puncture guide can be bent 0°-90° by the traction of the traction piece, and the direction adjustment unit indicates and sets the puncture angle of the puncture guide; the puncture unit limits the puncture depth of the puncture guide, and the puncture unit pushes the puncture needle kit along the puncture guide for puncture.

[0009] Preferably, the puncture guide comprises a metal sleeve, the head end of the metal sleeve is connected to the traction member, and the tail end of the metal sleeve is connected to the direction adjustment unit.

[0010] Preferably, a flexible hose and a spring are attached to the inner wall of the metal sleeve, and the flexible hose is sleeved outside the spring. The flexible hose and the spring provide flexible support and restoring force for the metal sleeve when it is bent.

[0011] Preferably, the direction adjustment unit includes a turntable, a base and a lock, the turntable and the lock are respectively arranged on the base, one side of the turntable is connected to the traction piece, and the side of the base is connected to the tail end of the metal sleeve; the turntable is provided with a scale for indicating and setting the puncture angle; the lock fixes the turntable in a specific position.

[0012] Preferably, a pulley assembly is provided inside the base, and the pulley assembly guides the moving direction of the traction member inside the pipe of the base.

[0013] Preferably, the puncture unit includes a guide rail, a stopper and an ejection frame, the guide rail is connected to the stopper, the stopper can slide along the guide rail and be fixed at a specific position, the head end cone of the ejection frame is inserted into the funnel of the stopper, and the tail end of the ejection frame is connected to the puncture needle kit. A V-shaped locking valve is provided on the stopper, and two tightening belts are connected to the V-shaped locking valve, so that the anti-slip gasket on the inner wall of the funnel-shaped head end of the stopper is close to the guide rail, so that the stopper is fixed at the required puncture depth, and at the same time, the tightening belt makes the three clamping strips at the funnel of the stopper close to each other, so that the circular diameter formed by them is reduced.

[0014] Preferably, the puncture needle kit sequentially nests the needle core, the needle tube, the dilation tube and the outer sheath tube from the inside to the outside.

[0015] Preferably, the head end of the puncture needle kit is connected to a micro guide wire, and the micro guide wire guides the puncture needle kit into a predetermined path of the target organ.

[0016] The present invention has the following beneficial effects:

[0017] 1. Real-time adjustment of puncture angle: The puncture kit of the present invention can achieve real-time angle adjustment from 0 to 90 degrees to adapt to the changes in the position of the target lesions and organ movements of different patients. By pressing the dial of the direction adjustment unit, unlocking and turning the dial to adjust the bending angle of the puncture guide, and then relocking it, the precise setting of the puncture angle is ensured, which is suitable for a wider range of clinical needs, reduces the difficulty of puncture and related complications, and improves the accuracy and safety of puncture.

[0018] 2. Semi-automatic puncture and depth control: The kit supports semi-automatic puncture operation. By pulling the ejection frame to the desired position and releasing it, the puncture is achieved using the thrust of the ejection frame. At the same time, by setting the position of the limiter along the guide rail and locking it, accurate puncture depth control is achieved. In addition, by adjusting the V-type locking valve, the locking function of the puncture needle can be achieved to ensure the stability of the puncture depth.

[0019] 3. Use of thin puncture needle and micro-guidewire: The present invention uses a thin puncture needle core and needle tube that match the micro-guidewire, which reduces the diameter of the puncture needle, thereby reducing the risk of complications such as bleeding and pneumothorax, and improving the safety of puncture. By fixing the micro-guidewire and pushing the needle tube and dilation tube into the target organ, the micro-guidewire and thick guidewire can be used interchangeably, which increases the flexibility and adaptability of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the puncture guide in the present invention;

[0021] Figure 2 is a bending change diagram of the puncture guide in the present invention;

[0022] Figure 3 It is a structural diagram of the turntable in the present invention;

[0023] Figure 4 It is a structural diagram of the base in the present invention;

[0024] Figure 5 is a structural diagram of the puncture unit in the present invention;

[0025] Figure 6 It is a structural diagram of the guide rail of the puncture unit in the present invention;

[0026] Figure 7 It is a structural diagram of the buckle in the present invention;

[0027] Figure 8 It is a structural diagram of the limiter in the present invention;

[0028] Fig. 9 It is a structural diagram of the ejector locking process in the present invention;

[0029] Fig.10 It is a structural diagram of the ejection frame in the present invention;

[0030] Fig.11 It is a structural diagram of each part of the puncture needle kit of the present invention;

[0031] Fig.12 It is a structural diagram of the puncture needle kit assembly in the present invention;

[0032] Fig.13 It is a structural diagram of the metal sleeve tail end joint in the present invention;

[0033] Fig.14 It is a schematic diagram of the puncture needle implanted into the target cell 1 in the present invention;

[0034] Fig.15 It is a schematic diagram of the process of implanting the micro-guide wire and the puncture guide into the target cell 1 in the present invention;

[0035] Fig.16 It is a schematic diagram of the process in which the wedge-shaped head end of the lock in the present invention leaves the outer wall of the turntable;

[0036] Fig.17 It is a schematic diagram of the ejection frame to the tail end of the long section of the guide rail in the present invention;

[0037] Fig.18 A schematic diagram of the ejection frame inserting the stopper in the present invention;

[0038] Fig.19 It is a schematic diagram of the puncture kit of the present invention puncturing the target organ 2;

[0039] Figures 1 to 19 The reference numerals shown in the figure respectively represent: puncture guide 1, metal sleeve 11, flexible hose 12, first spring 13, pull wire ring 14, direction adjustment unit 2, turntable 21, base 22, lock buckle 23, pulley assembly 24, second spring 25, puncture unit 3, guide rail 31, limiter 32, rectangular buckle 321, anti-slip gasket 322, clamping strip 323, tightening belt 324, cylindrical base 325, ejection frame 33, third spring 34, puncture needle kit 4, needle core 41, needle tube 42, dilation tube 43, outer sheath tube 44, micro guidewire 5, pull wire 6, ring 7. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0041] Example 1

[0042] Please refer to Figure 1 The present embodiment provides a variable direction puncture kit, which includes: a puncture guide 1, a direction adjustment unit 2, a puncture unit 3, a puncture needle kit 4, a micro guide wire 5, and a traction member.

[0043] The head end of the puncture guide 1 can be bent 0°-90° by the traction of the traction piece, and the direction adjustment unit 2 indicates and sets the puncture angle of the puncture guide 1; the puncture unit 3 limits the puncture depth of the puncture guide 1, and the puncture unit 3 pushes the puncture needle kit 4 along the puncture guide 1 for puncture.

[0044] The puncture guide 1 comprises: a metal sleeve 11, a flexible hose 12, and a first spring 13. The head end of the metal sleeve 11 is connected to a traction member, which may be a pull wire 6. The tail end of the metal sleeve 11 is connected to a direction adjustment unit 2. The inner wall of the metal sleeve 11 is attached with a flexible hose 12 and a first spring 13. The flexible hose 12 is sleeved outside the first spring 13. The flexible hose 12 and the first spring 13 provide flexible support and restoring force for the metal sleeve 11 when it is bent. The pull wire 6 is tied to a pull wire ring 14 at the head end of the metal sleeve 11, passes through an intermittent pull wire tunnel, and extends along the pull wire tunnel to the tail end of the metal sleeve 11; the tail end of the metal sleeve 11 is provided with a direction adjustment unit 2 on the side where the pull wire tunnel is located.

[0045] The head end of the metal sleeve 11 of the puncture guide 1 has two symmetrically distributed discontinuous surfaces, one of which has a similarly discontinuous wire pulling tunnel on its inner side. The wire pulling tunnel is hollow cylindrical, and the diameter of the hollow cylindrical wire pulling tunnel is smaller than the diameter of the metal sleeve 11. A wire pulling ring 14 is provided at the head end of the discontinuous surface on the side with the wire pulling tunnel.

[0046] Reference Figure 2 As the head end of the metal sleeve 11 gradually bends, the angle between the two adjacent discontinuous surfaces gradually decreases. When the head end of the metal sleeve 11 is bent to 90 degrees, the two adjacent discontinuous surfaces are completely fitted together, and the adjacent pull wire tunnels are also fitted together; a flexible hose 12 is attached to the inner wall of the discontinuous surface, and the outer wall of the flexible hose 12 covers the notch of the discontinuous surface. A first spring 13 is attached to the inner wall of the flexible hose 12, and both ends of the first spring 13 are respectively connected to the two ends of the inner wall of the discontinuous surface of the metal sleeve 11, and the length of the flexible hose 12 and the first spring 13 is greater than the length of the discontinuous surface.

[0047] There is a cylindrical needle track along the long axis of the metal sleeve 11 and at the center of the circle, and the cylindrical needle track is located in the center of the first spring 13; the pull wire 6 is tied to the pull wire ring 14 at the head end of the metal sleeve 11, and passes through the intermittent pull wire tunnel, extending along the pull wire tunnel to the tail end of the metal sleeve 11; there is a direction adjustment unit 2 at the side of the pull wire tunnel at the tail end of the metal sleeve 11, and the direction adjustment unit 2 can be used as a direction indicator.

[0048] Reference Figure 3-4The direction adjustment unit 2 is composed of a turntable 21, a base 22, a lock 23 and a pulley assembly 24. The turntable 21 is in a hollow cylindrical shape, and a scale indicating the bending angle of the puncture guide is provided on the top surface of the turntable 21. The outer edge of the turntable 21 is gear-shaped, and a ring 7 is provided on the inner wall thereof. The pull wire 6 is fixed on the ring 7, and a circular hole is provided in the center of the bottom surface of the turntable 21. A pulley assembly 24 is provided inside the base 22, and the pulley assembly 24 guides the moving direction of the pull wire 6 inside the pipe of the base 22.

[0049] The base 22 is circular, with a circular wire hole in the center of the base 22, which is connected to the metal sleeve 11 through a hollow cylindrical pipe, a pulley is provided at the connection between the inner wall of the cylindrical pipe and the wire tunnel in the metal sleeve 11, and a pulley is provided at the connection between the inner wall of the cylindrical pipe and the base 22. The base 22 has 6 cylindrical pillars perpendicular to the base, and each pillar has a pulley centered on the pillar. The wire 6 exits the wire tunnel and enters the base 22 through the pulley exit wire hole, and then passes around the 6 cylindrical pillar pulleys and is fixed on the ring 7 on the inner wall of the turntable 21. The other end of the pulley pillar has a disk parallel to the base, and a second spring 25 is provided between the disk and the top surface of the turntable, and the inner diameter of the top surface of the turntable = the disk diameter = the base diameter > the diameter of the circular hole in the center of the bottom surface of the turntable > the diameter of the wire hole in the center of the base. The head end of the lock buckle 23 is wedge-shaped, and its shape fits in the groove of the gear on the outer peripheral edge of the rotating disk 21 . The body of the lock buckle 23 is strip-shaped, and the tail end of the lock buckle 23 is connected to the metal sleeve 11 .

[0050] Reference Figure 5-6 The puncture unit 3 is composed of: a guide rail 31, a stopper 32, an ejection frame 33, and a third spring 34. The guide rail 31 is cylindrical and in a broken line shape. The long section of the guide rail 31 is parallel to the metal sleeve 11, and the short section of the guide rail 31 is connected and fixed to the metal sleeve 11. The long section of the guide rail 31 has a scale indicating the puncture depth. The tail end of the long section of the guide rail 31 passes through the center of the third spring 34, and the third spring 34 is fixed to the tail end of the long section of the guide rail 31. The stopper 32 is funnel-shaped (such as Figure 7 ), the funnel-shaped head end is a hollow cylinder, divided into three equal parts, the inner wall of each equal part is attached with a non-slip pad, and the outer wall of each equal part of the hollow cylinder has a rectangular buckle; the funnel-shaped funnel end is also divided into three equal parts, and the edge of each equal part in the plane where the funnel mouth is located has a clip 323 extending into the funnel, and the upper and lower edges of the clip 323 located on the inner side are both arc-shaped, and the depth of the lower edge from the edge of the funnel is greater than the depth of the upper edge from the edge of the funnel. The upper edges of the three equal parts form a circle, and the lower edges of the three equal parts form a circle, and the outer wall of each equal part of the funnel end has a rectangular buckle.

[0051] Reference Figure 8-9The inner diameter of the hollow cylinder at the funnel-shaped head end is larger than the diameter of the guide rail 31, and a long section of the guide rail 31 passes through the center of the funnel-shaped limiter 32; the two tightening belts 324 respectively pass through the rectangular buckle 321 on the outer wall of the hollow cylinder at the funnel-shaped head end and the rectangular buckle 321 on the outer wall of the funnel end, and after being wrapped around the outer wall of the hollow cylinder and the outer wall of the funnel end respectively, the two ends of the tightening belt 324 cross at the side where the direction adjustment unit 2 is located and are respectively connected to the two ends of the diamond-shaped locking valve, and the tip of the diamond-shaped locking valve has a circular hole, through which a barrel-shaped screw button passes, and there is a circumferential depression on the barrel-shaped screw button, and the circular hole at the tip of the diamond-shaped locking valve is stuck in the circumferential depression on the barrel-shaped screw button, and the barrel-shaped screw button is inserted into the cylindrical base 325, and the cylindrical base 325 is vertically fixed to the outer wall of the hollow cylinder, and the inner wall of the barrel-shaped screw button and the outer wall of the cylindrical base 325 are respectively provided with parent and child threads.

[0052] By turning the barrel-shaped screw button, the diamond tip is compressed, and the two ends of the diamond are stretched, driving the tightening belts 324 fixed at the two ends of the diamond to tighten, so that the hollow cylindrical funnel head end is tightened and fixed on the guide rail 31 through the anti-slip pad 322. At the same time, the funnel end of the funnel is tightened, so that the funnel end clamping strips 323 are close to each other, so as to lock the ejection frame 33.

[0053] Reference Fig.10 The head end of the ejection frame 33 is conical and the body is cylindrical. There is a circumferential depression near one end of the cone on the cylinder. The height of the depression is greater than the thickness of the funnel end card strip 323. The cone at the head end of the ejection frame 33 can be inserted into the funnel of the limiter 32. The diameter of the cylinder of the ejection frame 33 body is equal to the diameter of the plane where the funnel end opening is located. The cone at the head end of the ejection frame 33 and the center of the cylinder of the body are both hollow. The diameter of the hollow is greater than the diameter of the guide rail 31. A long section of the guide rail 31 passes through the hollow. The tail end of the cylinder of the body of the ejection frame 33 has a long strip perpendicular to the cylinder. The other end of the long strip is a puncture kit fixing hole. The fixing hole is hollow cylindrical, and its inner wall has threads. The puncture kit passes through the fixing hole. The threads on the puncture kit and the threads on the fixing hole are parent and child threads.

[0054] Reference Figure 11-12 The puncture needle kit 4 is nested from the inside to the outside in sequence: the needle core 41, the needle tube 42, the expansion tube 43, and the outer sheath 44. The head end of the puncture needle kit 4 is connected to the micro guide wire 5, and the micro guide wire 5 guides the puncture needle kit 4 into the predetermined path of the target organ. The outer diameter of the micro guide wire 5 is smaller than the inner diameter of the needle tube 42, and the length of the micro guide wire 5 is greater than the length of the metal sleeve 11.

[0055] Reference Figure 11-13The needle handle of the needle core 41 is a cylinder, and the bottom of the needle handle is connected to a cylinder with a smaller diameter and a threaded surface. The needle core 41 is cylindrical and the needle tip is conical; the needle tube 42 joint is composed of a hollow cylinder with a threaded inner wall, and a hollow cylinder with a threaded outer wall and a tapered center connected to its bottom, and the central tapered bottom is communicated with the needle tube 42; the expansion tube 43 joint is composed of a hollow cylinder with a threaded inner wall, and a hollow cylinder with a threaded outer wall and a tapered center connected to its bottom, and the central tapered bottom is communicated with the expansion tube 43, and the head end of the expansion tube 43 is conical; the outer sheath tube 44 joint is composed of a hollow cylinder with a threaded inner wall, and a hollow cylinder with a threaded outer wall and a tapered center connected to its bottom, and the central tapered bottom is communicated with the outer sheath tube 44.

[0056] The needle tube 42 is located outside the needle core 41, the expansion tube 43 is located outside the needle tube 42, the outer sheath tube 44 is located outside the expansion tube 43, the outer diameter of the needle core 41 is smaller than the inner diameter of the needle tube 42, the outer diameter of the needle tube 42 is smaller than the inner diameter of the expansion tube 43, the outer diameter of the expansion tube 43 is smaller than the inner diameter of the outer sheath tube 44, the outer diameter of the outer sheath tube 44 is smaller than the inner diameter of the aforementioned cylindrical needle channel, and the outer diameter of the micro guide wire 5 is smaller than the inner diameter of the needle tube 42. The length of the needle core 41 is greater than the length of the needle tube 42, the length of the needle tube 42 is greater than the length of the expansion tube 43, the length of the expansion tube 43 is greater than the length of the outer sheath tube 44, the length of the outer sheath tube 44 is greater than the length of the metal sleeve of the puncture guide, and the length of the micro guide wire 5 is greater than the length of the metal sleeve.

[0057] The threads between the needle core 41, needle tube 42, expansion tube 43, outer sheath tube 44 joint and the puncture kit fixing hole 35 on the aforementioned stopper 32 are mutually parent-child threads. The tail end joint of the puncture guide metal sleeve 11 is composed of a hollow cylinder with a threaded inner wall and a hollow cylinder with a cone at the center connected to the bottom. The central cone bottom is connected to the cylindrical needle channel. The threads between the cone needle core 41, needle tube 42, expansion tube 43, outer sheath tube 44 joint and the puncture guide metal sleeve 11 joint are also mutually parent-child threads.

[0058] Example 2

[0059] This embodiment provides a method for puncturing using a variable-direction puncture kit, and the specific steps are as follows:

[0060] 1. Implantation of puncture guide:

[0061] Under the guidance of ultrasound, CT or X-ray images, the doctor first uses a puncture needle 4 (inserts the needle core into the needle tube) to puncture the target organ (such as Fig.14 ).

[0062] After confirming that the puncture is successful, the needle core 41 is pulled out and the contrast agent is injected through the needle tube 42 .

[0063] Then, the micro-guidewire 5 is inserted into the target organ and left in place (eg Fig.15 ).

[0064] 2. Assembly of the puncture kit:

[0065] The puncture needle kit 4 is inserted into the cylindrical needle channel of the puncture guide 1 to form a complete puncture kit.

[0066] The needle core 41 of the puncture kit is pulled out, and the extracorporeal end of the micro-guide wire 5 is inserted into the puncture kit through the needle tube head.

[0067] 3. Direction adjustment:

[0068] By using the direction adjustment unit 2, the doctor can adjust the bending angle of the puncture guide 1 to adapt to the anatomical structure and respiratory movement of different patients (such as Fig.16 shown).

[0069] By pressing and rotating the rotating disk 21 and releasing it after reaching the desired bending angle, the rotating disk 21 will be automatically locked by the action of the third spring 34 .

[0070] 4.Puncture operation:

[0071] The puncture guide 1 is fixed in a proper position, and the stopper 32 is pulled along the guide rail 31 of the puncture unit 3 to a predetermined puncture depth, and locked (e.g. Figure 17-18 shown).

[0072] Insert the needle core 41 into the needle tube 42 and ensure that all components (needle core, needle tube, dilation tube, outer sheath tube) are correctly connected and fixed to the puncture guide 1 and the ejection frame 33.

[0073] 5. Semi-automatic puncture:

[0074] The ejection frame 33 is pushed to the end along the guide rail, the third spring 34 is compressed, and then the ejection frame 33 is released, and the force of the third spring 34 is used to make the puncture kit move along the guide 1 to achieve semi-automatic puncture (such as Fig.19 shown).

[0075] 6. Successful puncture and subsequent operations:

[0076] After the puncture is successful, the needle core 41 is pulled out and contrast medium is injected to confirm the puncture point.

[0077] The outer sheath 44 is left in the target organ, and other treatment devices, such as a guide wire, a long sheath, a balloon dilatation catheter, a stent delivery device, etc., can be further inserted through the outer sheath 44 for subsequent diagnosis and treatment operations.

[0078] The design of the entire process improves the accuracy and safety of puncture, while reducing operation time and complications, allowing doctors to perform puncture operations more flexibly and effectively.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A variable-direction puncture kit, characterized in that: include: A puncture guide (1), a direction adjustment unit (2), a puncture unit (3) and a puncture needle kit (4), wherein the rear end of the puncture guide (1) is connected to the direction adjustment unit (2), the puncture unit (3) is connected to the puncture needle kit (4), and the puncture unit (3) and the puncture needle kit (4) are respectively arranged inside the puncture guide (1); The head end of the puncture guide (1) can be bent by 0°-90° through the traction of the traction member, and the direction adjustment unit (2) indicates and sets the puncture angle of the puncture guide (1); the puncture unit (3) limits the puncture depth of the puncture guide (1), and the puncture unit (3) pushes the puncture needle kit (4) along the puncture guide (1) to perform puncture.

2. The variable direction puncture kit according to claim 1, characterized in that: The puncture guide (1) comprises a metal sleeve (11), the head end of the metal sleeve (11) is connected to the traction member, and the tail end of the metal sleeve (11) is connected to the direction adjustment unit (2).

3. The variable-direction puncture kit according to claim 2, characterized in that: A flexible hose (12) and a first spring (13) are attached to the inner wall of the metal sleeve (11); the flexible hose (12) is sleeved outside the first spring (13); the flexible hose (12) and the first spring (13) provide the metal sleeve (11) with flexible support and restoring force when it is bent.

4. The variable-direction puncture kit according to claim 2, characterized in that: The direction adjustment unit (2) comprises a turntable (21), a base (22) and a lock (23); the turntable (21) and the lock (23) are respectively arranged on the base (22); one side of the turntable (21) is connected to the traction member, and the side of the base (22) is connected to the rear end of the metal sleeve (11); the turntable (21) is provided with a scale for indicating and setting the puncture angle; the lock (23) fixes the turntable (21) at a specific position.

5. The variable-direction puncture kit according to claim 4, characterized in that: A pulley assembly (24) is provided inside the base (22), and the pulley assembly (24) guides the moving direction of the traction member inside the pipe of the base (22).

6. The variable-direction puncture kit according to claim 1, characterized in that: The puncture unit (3) comprises a guide rail (31), a stopper (32) and an ejection frame (33); the guide rail (31) is connected to the stopper (32); the stopper (32) can slide along the guide rail (31) and be fixed at a specific position; the head end cone of the ejection frame (33) is inserted into the funnel mouth of the stopper (32); and the tail end of the ejection frame (33) is connected to the puncture needle kit (4).

7. The variable-direction puncture kit according to claim 1, characterized in that: The puncture needle kit (4) is nested with a needle core (41), a needle tube (42), a dilation tube (43) and an outer sheath tube (44) in sequence from the inside to the outside.

8. The variable-direction puncture kit according to claim 1, characterized in that: The head end of the puncture needle kit (4) is connected to a micro guide wire (5), and the micro guide wire (5) guides the puncture needle kit (4) into a predetermined path of the target organ.

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