Piercing system

Abstract

The present invention relates to a puncture system. The puncture system comprises a handle assembly and a puncture assembly, wherein the puncture assembly is accommodated in the handle assembly and fixedly connected to the handle assembly, and the puncture assembly can be bent and deformed relative to the handle assembly. The puncture assembly can be bent and deformed, which is convenient for adjusting the shape of the puncture assembly on the human body, so that the distal end of the puncture assembly is directed toward a predetermined position, so that the puncture assembly accurately punctures the predetermined position, thereby improving the accuracy of puncture by the puncture assembly.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a puncture system. Background Art

[0002] The traditional puncture needle is made of a stainless steel tube. The puncture needle is delivered into the human body through a delivery sheath. However, during the puncture process, it is often difficult to control the shape of the puncture needle, which can easily reduce the accuracy of the puncture needle. Summary of the invention

[0003] Based on this, it is necessary to provide a puncture system that can adjust the shape of the puncture component in the puncture system to improve the accuracy of puncture by the puncture system.

[0004] The puncture system comprises a handle assembly and a puncture assembly. The puncture assembly is accommodated in the handle assembly and is fixedly connected to the handle assembly. The puncture assembly can be bent and deformed relative to the handle assembly.

[0005] The puncture assembly can be bent and deformed, which is convenient for adjusting the shape of the puncture assembly on the human body, so that the distal end of the puncture assembly is directed toward a predetermined position, the puncture assembly accurately punctures the predetermined position, and the accuracy of puncture by the puncture assembly is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is a schematic diagram of the structure of the puncture system provided in the first embodiment of the present application.

[0007] Figure 2 An exploded view of the puncture system provided in the first embodiment of the present application.

[0008] Figure 3 This is a schematic diagram of the puncture assembly in the first embodiment of the present application in a received state.

[0009] Figure 4a This is a schematic diagram of the top view of the handle body in the first embodiment of the present application.

[0010] Figure 4b It is a schematic diagram of a first handle member, a first control member, and a second control member.

[0011] Figure 4c It is a schematic diagram of the second handle member, the first control member, and the second control member.

[0012] Figure 5 This is a schematic diagram of the puncture assembly in the first embodiment of the present application in an extended state.

[0013] Figure 6a It is a connection diagram of the first fixing member, the second fixing member, the outer tube member, and the piercing member.

[0014] Figure 6b It is a schematic structural diagram of the first fixing member.

[0015] Figure 7 Schematic diagram of the structure of part of the second control component.

[0016] Figure 8a It is a schematic structural diagram of the second fixing member.

[0017] Figure 8b It is a schematic diagram of the top structure of the second fixing member.

[0018] Figure 8c A schematic diagram of the seal structure.

[0019] Fig. 9 This is a schematic diagram of the bending deformation of the puncture assembly in the first embodiment of the present application.

[0020] Fig.10 This is a schematic diagram of the structure of the piercing member in the first embodiment of the present application.

[0021] Fig.11a It is a schematic diagram of the support portion and the main body portion in the second embodiment of the present application.

[0022] Fig.11b This is a schematic diagram of the distal end of the puncture assembly in the second embodiment of the present application.

[0023] Fig.11c for Fig.11b Schematic diagram of the enlarged structure at X in the middle.

[0024] Fig.12 This is a schematic diagram of a bending adjustment member in the second embodiment of the present application.

[0025] Fig.13 This is a schematic diagram of a bending adjustment member in the third embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0028] In the field of interventional medical devices, the “distal end” is defined as the end away from the operator during surgery, and the “proximal end” is defined as the end close to the operator during surgery. “Axial” refers to the direction parallel to the line connecting the distal and proximal centers of the medical device, and “radial” refers to the direction perpendicular to the above axial direction.

[0029] See also Figures 1 to 5 The first embodiment of the present application provides a puncture system 1, which is used for puncturing in the human body. Specifically, it is not limited to puncturing the oval fossa, atrial septal puncture, or puncturing during transjugular intrahepatic portocaval shunt surgery. In this embodiment, the puncture system 1 punctures the oval fossa as an example for explanation.

[0030] See also Figures 1 to 3 The puncture system 1 includes a handle assembly 10 and a puncture assembly 20 accommodated in the handle assembly 10 and fixedly connected to the handle assembly 10. The puncture assembly 20 includes an outer tube 21 and a puncture member 22. The outer tube 21 is connected to the handle assembly 10. The outer tube 21 is in the shape of a hollow tube. In this embodiment, the puncture member 22 is plugged into the outer tube 21. At least part of the puncture member 22 is accommodated in the outer tube 21. In this embodiment, the extension direction of the puncture member 22 in the outer tube 21 is the same as the extension direction of the outer tube 21. The distal end 22a of the puncture member 22 is close to the distal end 21a of the outer tube 21. The proximal end 22b of the puncture member 22 passes through the proximal end 21b of the outer tube 21.

[0031] In this embodiment, at least part of the puncture member 22 is accommodated in the outer tube member 21, and the distal end 22a of the puncture member 22 is close to the distal end 21a of the outer tube member. The puncture member 22 is moved into the human body together with the outer tube member 21. During the puncture operation, the puncture member 22 does not need to be inserted from the proximal end 21b of the outer tube member 21 first, and then slide to the distal end 21a of the outer tube member 21, so as to avoid damaging the inner wall of the outer tube member 21 and generating debris during the sliding process of the puncture member 22 in the outer tube member 21, thereby reducing the risk of these debris forming thrombi that endanger patients.

[0032] In this embodiment, the distal end 22a of the puncture member 22 is close to the distal end 21a of the outer tube member 21, which means that the distal end 22a of the puncture member 22 is close to the end surface of the distal end 21a of the outer tube member 21, and the end surface of the distal end 22a of the puncture member 22 is not flush with the end surface of the distal end 21a of the outer tube member 21, that is, the puncture member 22 is accommodated in the outer tube member 21 or a part of the puncture member 22 is exposed outside the outer tube member 21.

[0033] In this embodiment, when the outer tube 21 slides to the designated area of ​​the human body, the distal end 22a of the puncture member 22 is always contained in the outer tube 21, and the outer tube 21 is not exposed. For example, when the outer tube 21 slides to the vicinity of the oval fossa of the heart, the outer tube 21 encounters a curved blood vessel channel of the human body and bends and deforms, but the puncture member 22 is not exposed from the outer tube 21, so as to prevent the puncture member 22 from stabbing the human body.

[0034] In this embodiment, the piercing member 22 passes through the outer tube 21, and the proximal end 22b of the piercing member 22 is also close to the proximal end 21b of the outer tube 21. Specifically, the proximal end 22b of the piercing member 22 extends out of the proximal end 21b of the outer tube 21.

[0035] See also Figure 1 and Figure 2 In this embodiment, the handle assembly 10 has a receiving piece 113. The receiving piece 113 receives part of the puncture assembly 20. The receiving piece 113 receives the proximal end of the puncture member 22 and the proximal end of the outer tube member 21. Specifically, the handle assembly 10 includes a handle body 11. The handle body 11 includes a first handle member 111 and a second handle member 112 connected to the first handle member 111. In this embodiment, the receiving space enclosed by the first handle member 111 and the second handle member 112 is the receiving piece 113.

[0036] See also Figure 4a , Figure 4b and Figure 4c , the first handle member 111 is provided with a snap-fit ​​member 1112. The second handle member 112 is provided with a resisting member 1122. In this embodiment, the snap-fit ​​member 1112 protrudes from the first handle member 111 toward the axial direction close to the handle assembly 10, and the snap-fit ​​member 1112 is hook-shaped as a whole. The snap-fit ​​member 1112 protrudes toward the negative direction of the Y axis. The resisting member 1122 is concave from the second handle member 112 toward the axial direction away from the handle assembly 10, and the resisting member 1122 is groove-shaped as a whole. Figure 4c In the embodiment, the resisting member 1122 is concave inwardly toward the negative direction of the Y axis. The resisting member 1122 cooperates with the buckling member 1112 to close and fix the first handle member 111 and the second handle member 112 together. It can be understood that in other embodiments, the buckling member 1112 can be a groove, and the resisting member 1122 can be a boss.

[0037] In this embodiment, the first handle member 111 is fixedly connected to the second handle member 112. Specifically, glue (not shown) is provided between the first handle member 111 and the second handle member 112, and the glue fixes the first handle member 111 and the second handle member 112. In other embodiments, other methods, such as high-temperature melting, or by providing threads on the outer wall of the first handle member 111 and the outer wall of the second handle member 112, the first handle member 111 and the second handle member 112 cooperate with each other and are threadedly connected with the locking member with internal threads. The specific method is not limited, and it is based on the ability to fix the first handle member 111 and the second handle member 112.

[0038] It is understandable that in other embodiments, the handle assembly 10 may be integrally formed, that is, the first handle member 111 and the second handle member 112 may be integrally formed.

[0039] See also Figure 1 , Figure 3 and Figure 5 In this embodiment, the puncture assembly 20 can slide relative to the handle assembly 10 in the axial direction. Specifically, in the axial direction, the puncture member 22 in the puncture assembly 20 can slide relative to the handle body 11 in the handle assembly 10. The puncture assembly 20 has a receiving state and an extended state. Among them, the receiving state and the extended state can be converted to each other. The extended state means that the distal end 22a of the puncture member 22 is partially exposed outside the distal end 21a of the outer tube 21. The received state means that the distal end 22a of the puncture member 22 is received in the distal end 21a of the outer tube 21.

[0040] The handle assembly 10 further includes a first control member 12. The first control member 12 is disposed in at least one of the first handle member 111 and the second handle member 112. Figure 1 and Figure 2 In this embodiment, there are two first control members 12, which are respectively arranged on the first handle member 111 and the second handle member 112. The first control member 12 is connected to the proximal end of the piercing member 22. The first control member 12 is used to control the piercing member 22 to slide axially relative to the handle body 11. Figure 5 The first control member (not shown) can control the piercing member 22 to slide in the axial direction, so that the distal end 22a of the piercing member 22 extends out of the outer tube 21. Figure 3 , or control the distal end 22a of the piercing member 22 to extend into the outer tube 21.

[0041] It can be understood that after receiving the external force, the first control member 12 transmits the force to the puncture member 22, so that the puncture member 22 slides in the axial direction. In this embodiment, the first control member 12 receives the external force and slides relative to the handle body 11 in the axial direction. The first control member 12 is connected to the puncture member 22, and the first control member 12 slides with the puncture member 22, so that the puncture member 22 passes through the outer tube 21 to perform the puncture operation. It can be understood that in this embodiment, the first control member 12 is indirectly connected to the proximal end of the puncture member 22. In other embodiments, the first control member 12 can be directly connected to the puncture member 22.

[0042] At least one of the first handle member 111 and the second handle member 112 is provided with a first limiting hole 1111. The first limiting hole 1111 limits the travel of the first control member 12. The first limiting hole 1111 is connected to the receiving member 113. Figure 2 , Figure 4a , Figure 4b and Figure 4c In this embodiment, the first handle member 111 and the second handle member 112 are both provided with a first limiting hole 1111. The first limiting hole 1111 in the first handle member 111 and the first limiting hole 1111 in the second handle member 112 have the same shape, and the first limiting hole 1111 in the first handle member 111 and the first limiting hole 1111 in the second handle member 112 are directly opposite. In this embodiment, the first limiting hole 1111 is a through hole. It is understandable that in other embodiments, there may be only one first control member 12 and the first limiting hole 1111 used in conjunction with the first control member 12.

[0043] See also Figure 2 In the present embodiment, the handle assembly 10 further includes a first fixing member 13. The first fixing member 13 is received in the receiving member 113. The first fixing member 13 is connected to the proximal end of the puncture member 22 (not shown). Specifically, the first fixing member 13 includes a first fixing member body 131. The proximal end of the puncture member 22 extends into the first fixing member body 131 and is fixedly connected to the first fixing member body 131. It can be understood that at least part of the first fixing member body 141 is directly opposite to the first limiting hole 1111. That is, the radially inward projection of the first limiting hole 1111 at least partially falls on the first fixing member body 131. In the present embodiment, the first control member 12 receives the action of the outside world and slides axially relative to the handle body 11, and the first control member 12 drives the first fixing member 13 and the puncture member 22 to slide axially relative to the handle body 11. In other embodiments, external force directly acts on the first fixing member 13 to make the first fixing member 13 slide axially relative to the handle body 11 , and the first fixing member 13 drives the piercing member 22 to slide axially relative to the handle body 11 .

[0044] See also Figure 2In the present embodiment, the first fixing member 13 further includes a first fixing portion 132 connected to the first fixing member body 131. The first fixing portion 132 is connected to the outer wall of the first fixing member body 131. In the present embodiment, the first fixing portion 132 is integrally formed with the first fixing member body 131. The first fixing portion 132 passes through the first limiting hole 1111 and is connected to the first control member 12. Specifically, the first fixing portion 132 is disposed on the outer wall of the first fixing member 13 and protrudes radially outward from the outer wall of the first fixing member 13. After a portion of the first fixing portion 132 passes through the first limiting hole 1111, it is connected to the first control member 12. It can be understood that a portion of the first fixing portion 132 is opposite to the first limiting hole 1111. That is, a portion of the first fixing portion 132 is opposite to the hole wall of the first limiting hole 1111.

[0045] In this embodiment, the first fixing portion 132 passes through a portion of the first limiting hole 1111 and is fixedly connected to the first control member 12. Specifically, the first control member 12 is provided with a first clamping portion 121. The first fixing portion 132 extends into the first clamping portion 121 and is fixedly connected to the first clamping portion 121. The first clamping portion 121 is a groove. The first fixing portion 132 is interference fit with the first clamping portion 121. In other embodiments, the first clamping portion 121 and the first fixing portion 132 are also bonded with glue to ensure that the first clamping portion 121 and the first fixing portion 132 are stably connected.

[0046] In this embodiment, the number of the first fixing parts 132, the number of the first limiting holes 1111, and the number of the first control parts 12 are the same. That is, the number of the first fixing parts 132 is two, which pass through the first limiting hole 1111 of the first handle part 111 and the first limiting hole 1111 of the second handle part 112 respectively. The two first fixing parts 132 are symmetrically distributed about the axial direction of the handle assembly 10, so that the first fixing part 13 is uniformly stressed as a whole, and the first fixing part 13 can smoothly slide axially relative to the handle body 11. In other embodiments, the number of the first fixing parts 132 is not limited, and the first control part 12 can control the sliding of the puncture part 22 through the first fixing part 132. In other embodiments, the first fixing part 132 is a groove, which is plugged into the first clamping part 121 and fixed in the first fixing part 132.

[0047] See also Figure 4a , Figure 4b and Figure 4cIn this embodiment, the first limiting hole 1111 includes a first limiting portion 1111a and a second limiting portion 1111b opposite to the first limiting portion 1111a. The first limiting portion 1111a and the second limiting portion 1111b are arranged at intervals in the axial direction. The first limiting portion 1111a and the second limiting portion 1111b are respectively two hole walls opposite to the first limiting hole 1111. The other hole walls of the first limiting hole 1111, together with the first limiting portion 1111a and the second limiting portion 1111b, form the first limiting hole 1111. The first limiting portion 1111a is the distal end of the first limiting hole 1111, and the second limiting portion 1111b is the proximal end of the first limiting hole 1111.

[0048] The first limiting hole 1111 limits the axial travel of the first control member 12. That is, the first limiting portion 1111a and the second limiting portion 1111b limit the axial travel of the first control member 12 to limit the axial travel of the first fixing member 13 and the piercing member 22. The axial sliding process of the piercing member 22 is as follows.

[0049] See also Figure 2 , Figure 4b , Figure 4c and Figure 5 On the one hand, the first control member 12 slides from the proximal end of the first limiting hole 1111 to the distal end of the first limiting hole 1111, and the first control member 12 drives the first fixing portion 132 and the piercing member 22 to slide in a direction away from the proximal end 11b of the handle body 11, and the piercing member 22 gradually extends out of the outer tube member 21. The first fixing portion 132, which is partly opposite to the first limiting hole 1111, abuts against the distal end of the first limiting hole 1111 and is restricted by the distal end of the first limiting hole 1111. The first fixing portion 132 cannot continue to slide in a direction away from the proximal end 11b of the handle body 11. The piercing member 22 and the first control member 12 cannot continue to slide in a direction away from the proximal end 11b of the handle body 11.

[0050] On the other hand, the first control member 12 slides from the distal end of the first limiting hole 1111 to the proximal end of the first limiting hole 1111. The first control member 12 drives the first fixing portion 132 and the piercing member 22 to slide in the direction close to the proximal end 11b of the handle body 11. The first fixing portion 132, which is partially opposite to the first limiting hole 1111, is restrained by the second limiting portion 1111b after being pressed against the proximal end of the first limiting hole 1111. The first fixing portion 132 cannot slide in the direction close to the proximal end 11b of the handle body 11. The piercing member 22 and the first control member 12 cannot continue to slide in the direction close to the proximal end of the handle body 11.

[0051] In this embodiment, the cross-sectional area of ​​the first fixing member body 131 is larger than the first limiting hole 1111 , so that the first fixing member body 131 cannot pass through the first limiting hole 1111 , and the first fixing member 13 is not easy to be separated from the handle body 11 .

[0052] The axial distance D1 between the first limiting portion 1111a and the second limiting portion 1111b corresponds to the stroke of the entire puncture member 22 in one puncture process. The stroke of the first control member 12 sliding in the first limiting hole 1111 in a direction away from the proximal end of the handle body 11 is the same as the sliding stroke of the entire puncture member 22. Since the puncture member 22 bends in the human body, the stroke of the distal end of the puncture member 22 is less than or equal to the stroke of the entire puncture member 22, and less than or equal to the axial distance between the first limiting portion 1111a and the second limiting portion 1111b.

[0053] During the puncture operation with a traditional puncture device, the doctor usually holds the connector of the puncture device with his hand and applies a thrust to the connector of the puncture device so that the needle tip of the puncture device pierces the atrial septum. Due to the effect of inertia, after the doctor pierces the atrial septum with the puncture device, the doctor's hand continues to push the connector of the puncture device, causing the needle tip of the puncture device to continue to move, resulting in an excessive stroke. This can easily injure the left atrium wall and cause pericardial tamponade. Or, it can easily pierce the aorta and cause serious complications. In addition, the thrust applied by the doctor to the connector of the puncture device is uneven, which affects the sliding of the puncture device in the sheath. After piercing the atrial septum, the puncture device 22 in the present application is restricted by the first limit hole 1111 and will not continue to move, thereby preventing the puncture device 22 from continuing to pierce the left atrium wall, thereby improving the safety of puncture operations using the puncture device 22. Furthermore, the two first control members 12 are respectively arranged on the first handle member 111 and the second handle member 112. The force applied by the doctor is transmitted to the puncture member 22 by pushing the two first control members 12, so that the force applied to the puncture member 22 is more uniform, and the puncture member 22 can slide smoothly in the axial direction, thereby improving the stability of the puncture of the puncture member 22.

[0054] See also Figure 1 , Figure 4b and Figure 4c In this embodiment, the outer wall of the first control member 12 is provided with a plurality of protrusions arranged at intervals, and the protrusions protrude in a direction opposite to the opening direction of the first holding portion 121. These protrusions can increase the friction between the doctor's hand and the first control member 12, making it easier for the doctor to push the first control member 12 to slide.

[0055] Please refer again Figure 2 , Figure 6a and Figure 6b The first fixing member body 131 is provided with a first connecting member channel 1311 , the proximal end (not shown) of the piercing member 22 is fixed in the first connecting member channel 1311 , and the inner cavity of the piercing member 22 is communicated with the first connecting member channel 1311 .

[0056] The puncture system 1 further includes a first connector 16. The first connector channel 1311 is connected to the first connector 16 and the interior of the puncture member 22, so that the first liquid medium can be sequentially transported into the body through the first connector 16, the first connector channel 1311 and the puncture member 22. In this embodiment, the puncture member 22 is connected to the first connector 16 through the first connector channel 1311 in the first fixing member body 131.

[0057] In other embodiments, part of the puncture member 22 is received and fixed in the first fixing member 131, and part of the puncture member 22 that passes through the first fixing member body 131 is connected to the first connecting member 16. That is, the proximal end of the puncture member 22 is directly connected to the first connecting member 16. The first liquid medium can be directly input into the puncture member 22 through the first connecting member 16, thereby improving the efficiency of inputting the first liquid medium into the puncture member 22.

[0058] The first connecting member 16 includes a first connecting portion 162 and a first switch portion 161 connected to the first connecting portion 162. The first switch portion 161 is disposed outside the handle assembly 10. The proximal end of the first connecting portion 162 is connected to the first switch portion 161. The distal end of the first connecting portion 162 is connected to the first connecting member channel 1311, and the first connecting portion 162 is communicated with the first connecting member channel 1311.

[0059] Specifically, when the first switch part 161 is in a normally open state, the first liquid medium or the guide wire can be introduced through the first switch part 161. The first liquid medium or the guide wire moves into the first connector channel 1311 through the first connector 162. Then it enters the human body through the inner cavity of the puncture part 22. It can be understood that the first liquid medium is not limited to a contrast agent or saline. When the first switch part 161 is in a normally closed state, it can prevent blood from passing through. In this embodiment, the first switch part 161 is a three-way valve, and the first connector 162 is a hollow tubular structure.

[0060] The first fixing member body 131 is also provided with a second channel 1312 spaced apart from the first connecting member channel 1311. That is, the first connecting member channel 1311 is not connected to the second channel 1312. The inner diameter of the second channel 1312 is larger than the inner diameter of the first connecting member channel 1311. The puncture assembly 20 also includes a second connecting member 17. The second connecting member 17 is also provided outside the handle assembly 10. A portion of the second connecting member 17 is connected to the outer tube 21 by being provided in the second channel 1312.

[0061] Please refer again Figure 1 , Figure 3 and Figure 5In this embodiment, the outer tube 21 can slide relative to the handle assembly 10 in the axial direction. That is, the distal end 21a of the outer tube 21 can slide in the axial direction in a direction away from the handle assembly 10, so that the puncture assembly 20 is converted from the extended state to the retracted state. The distal end 21a of the outer tube 21 can also slide in a direction close to the handle body 11, so that the puncture member 22 is converted from the retracted state to the extended state.

[0062] Specifically, see Figure 2 The handle assembly 10 further includes a second fixing member 15 located distally of the first fixing member 13. The second fixing member 15 is used to fix the outer tube member 21. The second fixing member 15 is received in the receiving member 113. The second fixing member 15 is spaced apart from the first fixing member 13. The second fixing member 15 is located distally of the first fixing member 13, that is, in the axial direction, the proximal end of the first fixing member 13 is closer to the proximal end of the puncture system 1 than the second fixing member 15. The first fixing member 13 is fixedly connected to the proximal end 22b of the puncture member 22, so that the distal end 22a of the puncture member 22 can be controlled to extend out of the distal end 21a of the outer tube member 21 or extend into the distal end 21a of the outer tube member 21 through the first fixing member 13.

[0063] See also Figure 1 , Figure 2 and Figure 7 The handle assembly 10 further includes a second control member 14. The second control member 14 is spaced apart from the first control member 12. The second control member 14 is connected to the outer tube member 21. The second control member 14 is used to control the outer tube member 21 to slide relative to the piercing member 22 in the axial direction.

[0064] In this embodiment, the outer tube 21 can slide relative to the handle body 11, so as to accurately adjust the position of the outer tube 21 in the human body. The second control member 14 controls the outer tube 21 to slide relative to the handle body 11 in the axial direction, so that it slides in a direction away from the proximal end of the handle body 11 and re-covers the puncture member 22, and the puncture member 22 is accommodated in the hollow tube body of the outer tube 21, thereby reducing the risk of the puncture member 22 puncturing the inner wall of the human body and improving the safety of the operation.

[0065] In this embodiment, the first control member 12 is closer to the proximal end of the puncture system 1 than the second control member 14. After the first control member 12 controls the puncture member 22 to transform from the contained state to the extended state and pierce the atrial septum, it is necessary to control the second control member 14 to slide in a direction away from the proximal end of the puncture system 1 to control the outer tube 21 to cover the puncture member 22 again. Since the first control member 12 is closer to the proximal end of the puncture system 1 than the second control member 14, that is, the second control member 14 is farther away from the proximal end of the puncture system 1 than the first control member 12, when the second control member 14 is controlled to slide in the direction away from the proximal end of the puncture system 1, the second control member 14 will not gradually approach the first control member 12, but will gradually move away from the first control member 12. In the process of controlling the second control member 14, it is not easy to accidentally touch the first control member 12, so as to avoid accidentally touching the first control member 12 and changing the position of the puncture member 22 in the human body, and to avoid touching the first control member 12 and changing the position of the puncture needle 22. If the first control member 12 is passively touched and then withdrawn, the puncture needle 22 will retract into the outer tube 21, so that the distal end of the puncture assembly 20 rebounds to the right atrium and cannot enter the left atrium.

[0066] Combination Figure 4a , Figure 4b and Figure 4c , the second control member 14 covers part of the first handle member 111 and part of the second handle member 112. The first handle member 111 and the second handle member 112 are both provided with a notch 200. The notch 200 is formed by a part of the outer surface of the first handle member 111 or a part of the outer surface of the second handle member 112 being concave radially inward. The second control member 14 is placed on the notch 200. The two opposite side walls of the notch 200 are used to limit the axial travel of the second control member 14.

[0067] See also Figure 2 and Figure 7 , the second control member 14 includes a second clamping portion 141 and a connecting thread 142 spaced apart from the second clamping portion 141. The second clamping portion 141 is a groove provided on the inner surface of the second control member 14 and recessed toward the outer surface of the second control member 14. The second clamping portion 141 in the second control member 14 is used to cooperate with the second fixing member 15 to control the axial movement of the second fixing member 15. The connecting thread 142 of the second control member 14 is used to adjust the deformation and bending of the outer tube 21. In this embodiment, the second clamping portion 141 and the connecting thread 142 are both provided on the inner surface of the second control member 14, and the connecting thread 142 and the second clamping portion 141 can move axially with the second control member 14 at the same time. In other embodiments, the connecting thread 142 and the second clamping portion 141 can be respectively provided in different sub-components in the second control member 14. As long as the connecting thread 142 and the second clamping portion 141 can move axially synchronously.

[0068] In this embodiment, the second control member 14 is connected to the proximal end of the outer tube member 21, and the second control member 14 is indirectly connected to the proximal end of the outer tube member 21. In other embodiments, the second control member 14 may also be directly connected to the proximal end of the outer tube member 21.

[0069] See also Figure 4a , 4b and Figure 4c In this embodiment, the handle assembly 10 is provided with a second limiting hole 1113. The second limiting hole 1113 is used to limit the axial stroke of the second control member 14. Specifically, the first handle member 111 in the handle assembly 10 is provided with a second limiting hole 1113. The second limiting hole 1113 is spaced apart from the first limiting hole 1111. The second limiting hole 1113 penetrates from the outer wall of the handle body 11 to the receiving member 113 in the handle body 11. Part of the second control member 14 is connected to the proximal end of the outer tube member 21 through the first limiting hole 1111. The proximal end of at least part of the outer tube member 21 is opposite to the second limiting hole 1113. The second handle member 112 is also provided with a second limiting hole 1113. The second limiting hole 1113 of the second handle member 112 is opposite to the second limiting hole 1113 of the first handle member 111.

[0070] See also Figure 2 The second fixing member 15 includes a second fixing member body 151. The proximal end of the outer tube 21 extends into the second fixing member body 151 and is fixedly connected to the second fixing member body 151.

[0071] In this embodiment, the second fixing member 15 further includes a second fixing portion 152 connected to the second fixing member body 151. The second fixing portion 152 is connected to the outer wall of the second fixing member body 151. The second fixing portion 152 passes through the second limiting hole 1113 and is connected to the second control member 14. Figure 4b , Figure 4c and Figure 7 , the second fixing portion 152 protrudes radially from the outer wall of the second fixing body. The second fixing portion 152 passes through the second limiting hole 1113 and is buckled with the second clamping portion 141 in the second control member 14. During the axial movement of the second control member 14, the distal side wall and the proximal side wall of the second clamping portion 141 clamp the distal outer wall and the proximal outer wall of the second fixing portion 152, and drive the second fixing portion 152 and the second fixing member body 151 to move axially. In this embodiment, part of the second fixing portion 152 is directly opposite to the second limiting hole 1113.

[0072] See also Figure 4a , Figure 4b and Figure 4cIn this embodiment, the second limiting hole 1113 includes a third limiting portion 1113a and a fourth limiting portion 1113b opposite to the third limiting portion 1113a. The third limiting portion 1113a and the fourth limiting portion 1113b are arranged at intervals in the axial direction. The third limiting portion 1113a and the fourth limiting portion 1113b limit the axial stroke of the second control member 14. The third limiting portion 1113a is the distal end of the second limiting hole 1114, and the fourth limiting portion 1113b is the proximal end of the second limiting hole 1113.

[0073] On the one hand, see Figure 3 and Figure 4b When the second control member 14 slides from the proximal end of the second limiting hole 1113 to the distal end of the second limiting hole 1113, the second control member 14 drives the second fixing portion 152 and the outer tube member 21 to slide away from the proximal end 11b of the handle body 11. The outer tube member 21 gradually covers the distal end 22a of the puncture member 22. When the second fixing portion 152 abuts against the distal end of the second limiting hole 1114, the second fixing portion 152 is restricted by the distal end of the second limiting hole 1114, and the second fixing portion 152 and the puncture member 22 cannot continue to slide in the direction away from the proximal end 11b of the handle body 11. The second fixing portion 152 and the outer tube member 21 cannot continue to slide in the direction away from the proximal end 11b of the handle body 11. In this process, the puncture member 22 is converted from an extended state to a retracted state.

[0074] On the other hand, see Figure 4b and Figure 5 When the second control member 14 slides from the distal end of the second limiting hole 1113 to the proximal end of the second limiting hole 1113, the second control member 14 drives the second fixing portion 152 and the outer tube member 21 to slide toward the proximal end 11b of the handle body 11, so that the distal end 22a of the piercing member 22 is gradually exposed outside the outer tube member 21. When the second fixing portion 152 abuts against the proximal end of the second limiting hole 1113, the second fixing portion 152 is restricted by the proximal end of the second limiting hole 1113, and the second fixing portion 152 and the piercing member 22 cannot slide in the direction close to the proximal end of the handle assembly 10. In this process, the piercing member 22 is converted from the accommodated state to the extended state.

[0075] The third limiting portion 1113a and the fourth limiting portion 1113b are respectively two opposite hole walls of the second limiting hole 1113. The other hole walls of the second limiting hole 1113, together with the third limiting portion 1113a and the fourth limiting portion 1113b, form the second limiting hole 1113. The cross-sectional area of ​​the second fixing member body 151 is larger than the second limiting hole 1113, so that the second fixing member 151 cannot pass through the second limiting hole 1113, and the second fixing member 151 is not easy to be separated from the handle body 11.

[0076] In this embodiment, the movable axial stroke of the outer tube 21 is greater than or equal to the movable axial stroke of the puncture member 22. In this way, after the puncture member 22 punctures the atrial septum, the outer tube 21 slides away from the proximal end of the handle assembly 10, and can completely cover the puncture member 22 again, thereby reducing the risk of the puncture member 22 puncturing the inner wall of the human body and improving the safety of the operation.

[0077] The movable axial stroke of the outer tube 21 is the axial distance D2 between the third limit portion 1113a and the fourth limit portion 1113b. The movable axial stroke of the puncture member 22 is the axial distance D1 between the first limit portion 1111a and the second limit portion 1111b. Wherein, D2 is greater than or equal to D1, so that the movable axial stroke of the outer tube 21 is greater than the movable axial stroke of the puncture member 22, so that the outer tube 21 can re-cover the puncture member 22 after the puncture member 22 extends out of the outer tube 21. The movable axial stroke of the outer tube 21 is the same as the movable axial stroke of the second control member 14. The movable axial stroke of the puncture member 22 is the same as the movable axial stroke of the first control member 12.

[0078] In this embodiment, when the outer tube 21 slides in a direction away from the proximal end 11b of the handle body 11, the puncture member 22 remains stationary relative to the proximal end 11b of the handle body 11 to ensure that the position of the puncture member 22 in the human body remains unchanged, thereby preventing the puncture member 22 from moving and easily puncturing the left atrium wall.

[0079] See also Figure 2 , Figure 6a , Figure 8a and Figure 8b The second fixing member 15 is provided with a connecting cavity 1512 connected to the inner cavity of the outer tube member 21, and a puncture member channel 1511 connected to the connecting cavity 1512. The puncture member 22 is inserted into the outer tube member 21 through the puncture member channel 1511 and the connecting cavity 1512. Specifically, the second fixing member body 151 includes the puncture member channel 1511. The proximal end of the outer tube member 21 is inserted into the second fixing member body 151. The puncture member channel 1511 is opposite to the first connecting member channel 1311. The puncture member 22 passes through the puncture member channel 1511 and is inserted into the outer tube member 21.

[0080] In this embodiment, the second fixing member body 151 further includes a connecting cavity 1512 and a second connecting member channel 1513. The second connecting member channel 1513 is spaced apart from the piercing member channel 1511, and the second connecting member channel 1513 is connected to the connecting cavity 1512. The connecting cavity 1512 is connected to the piercing member channel 1511. The second connecting member channel 1513 is connected to the piercing member channel 1511 through the connecting cavity 1512.

[0081] See also Figure 1 , Figure 2 , Figure 6a , the second connecting member 17 can be used to introduce a second liquid medium. The second liquid medium can be transported into the body through the second connecting member 17, the second connecting member channel 1513, the connecting cavity 1512 and the outer tube member 21 in sequence. Specifically, the second connecting member 17 includes a second switch portion 171 and a second connecting portion 172 connected to the second switch portion 171. The second switch portion 171 is arranged outside the handle body 11. The proximal end of the second connecting member 17 is connected to the second switch portion 171. Part of the second connecting portion 172 passes through the second channel 1312. The distal end of the second connecting portion 172 is connected to the second connecting member channel 1513 and the connecting cavity 1512. When the second switch portion 171 is in a normally open state, the second liquid medium can be introduced through the second switch portion 171. The second liquid medium moves to the second connecting member channel 1513, the connecting cavity 1512, and the inner cavity of the outer tube member 21 through the second connecting portion 172 and enters the human body. It can be understood that the second liquid medium is not limited to physiological saline, etc., and is determined according to actual needs.

[0082] On the one hand, during the exhaust process of the puncture system 1, the first liquid medium flows through the first connector 16, the first connector channel 1311 and the puncture member 22, and the gas in the first connector 16, the first connector channel 1311 and the puncture member 22 is discharged outside the puncture system 1. The second liquid medium flows through the second connector 17, the second connector channel 1513, the connecting cavity 1512 and the outer tube member 21, and the gas in the second connector 17, the second connector channel 1513, the connecting cavity 1512 and the outer tube member 21 is discharged outside the puncture system 1. This embodiment can effectively discharge the gas in the puncture system 1 outside the puncture system 1 to avoid gas embolism during the operation. It can be understood that during the exhaust process, only the first liquid medium flows through the first connector 16, the first connector channel 1311 and the puncture member 22, or only the second liquid medium flows through the second connector 17, the connecting cavity 1512 and the outer tube member 21, and the gas in the puncture system 1 cannot be completely discharged. This is because the exhaust of the first connector 16 , the first connector channel 1311 and the piercing member 22 is independent of the exhaust of the second connector 17 , the second connector channel 1513 , the connecting cavity 1512 and the outer tube 21 .

[0083] On the other hand, when the first liquid medium is contrast fluid, the first liquid medium flows out from the distal end 22a of the puncture member 22, and the position of the distal end 22a of the puncture member 22 can be accurately determined, making it easier for the doctor to control the puncture member 22 to puncture the atrial septum, thereby improving the accuracy of the puncture operation.

[0084] See also Figure 6a , 8a , 8b and Figure 8cThe proximal end of the second fixing member body 151 is provided with a connecting groove 19. The connecting groove 19 is connected to the piercing member channel 1511. The proximal end of the second fixing member body 151 is also provided with a joint 151c. The joint 151c is spaced apart from the piercing member channel 1511. The joint 151c is used to connect with the second connecting portion 172. The second connecting portion 172 is penetrated inside the joint 151c and is connected to the second connecting member channel 1513.

[0085] See also Figure 6a , Figure 8a and Figure 8c The handle assembly 10 further includes a seal 18. The seal 18 is attached to and fixed on the proximal end surface of the second fixing body 151, and seals the opening of the communication groove 19 in the second fixing body 151 to prevent liquid from flowing through the gap between the communication groove 19 and the seal 18. The manner in which the seal 18 is attached to and fixed on the proximal end surface of the second fixing body 151 is not limited to one or a combination of multiple methods such as bonding and plugging.

[0086] In this embodiment, the sealing member 18 is in a cubic shape as a whole, and is provided with an opening 181, which passes through the proximal end surface and the distal end surface of the sealing member 18, and is communicated with the connecting groove 19. The piercing member 22 passes through the opening 181 and is connected to the piercing member channel 1511. The inner wall of the opening 181 is interference-fitted with the piercing member 22 to prevent liquid from flowing through the gap between the piercing member 22 and the opening 181.

[0087] The side wall of a portion of the sealing member 18 is concave inwardly toward the axial direction where the opening 181 is located. This portion fits against the side wall of the joint 151c in the second fixing member body 151, making the sealing member 18 and the second fixing member body 151 more compact.

[0088] See also Fig. 9 , the puncture assembly 20 can be bent and deformed. Specifically, the outer tube 21 in the puncture assembly 20 can be bent and deformed. Figure 2 and Figure 3 The puncture system 1 further includes a bending adjustment component 30. The bending adjustment component 30 is connected to the puncture component 20, and the bending adjustment component 30 is also connected to the handle component 10. The bending adjustment component 30 controls the bending deformation of the puncture component 20. In this embodiment, the outer tube 21 is adjusted in shape by the bending adjustment component 30. In other embodiments, the outer tube 21 can be prefabricated, that is, it is already in a bent state before being inserted into the human body.

[0089] Specifically, the bending adjustment assembly 30 includes an adjusting member 31, a bending adjustment member 33, and a traction member 32 connected between the adjusting member 31 and the bending adjustment member 33. The adjusting member 31 is accommodated in the accommodating member 113. The adjusting member 31 is spaced apart from the second fixing member 15, and is arranged on the side of the second fixing member 15 away from the first fixing member 13. The adjusting member 31 is sleeved on the outer wall of the outer tube member 21, and the adjusting member 31 can slide on the outer wall of the outer tube member 21. The bending adjustment member 33 is arranged in the distal end of the outer tube member 21 and fixed in the distal end of the outer tube member 21. The radially inward projection of the bending adjustment member 33 falls on the distal end of the puncture member 22. The proximal end of the traction member 32 is connected to the adjusting member 31. The distal end of the traction member 32 is connected to the bending adjustment member 33.

[0090] The adjusting member 31 is connected to the second control member 14. Figure 2 , Figure 4a , 4b 4c, at least one of the first handle member 111 and the second handle member 112 is provided with a third limiting hole 300. The third limiting hole 300 is spaced apart from the second limiting hole 1113. The third limiting hole 300 penetrates from the outer wall of the handle body 11 to the receiving member 113 in the handle body 11. A portion of the adjusting member 31 extends from the third limiting hole 300 and is threadedly connected with the connecting thread 142 in the second control member 14.

[0091] The specific process of the second control member 14 adjusting the position of the adjusting member 31 to bend the outer tube member 21 is described as follows. For example, the second control member 14 abuts against the side wall of the notch 200 at the proximal end, and is supported by the side wall of the proximal end of the notch 200, and rotates relative to the axis of the handle body 11. The adjusting member 31 slides on the outer wall of the outer tube member 21 relative to the handle body 11 as the second control member 14 rotates. When the second control member 14 drives the adjusting member 31 to slide toward the proximal end of the outer tube member 21, the adjusting member 31 pulls the traction member 32 and the bending adjusting member 33 toward the proximal end of the outer tube member 21, so that the distal end of the outer tube member 21 bends in a direction close to the proximal end of the outer tube member 21. The bending of the outer tube member 21 in a direction close to the proximal end of the outer tube member 21 will also cause the puncture member 22 to bend in the same direction. In this embodiment, the bending adjusting member 33 is a hollow annular structure, and the bending adjusting member 33 can be used as a developing point.

[0092] In this embodiment, the outer tube 21 can be bent and deformed, which is convenient for adjusting the shape of the outer tube 21 on the human body so that the distal end of the outer tube 21 is directed toward a predetermined position, so that the puncture member 22 can accurately puncture the predetermined position, thereby improving the accuracy of puncture by the puncture member 22.

[0093] In this embodiment, the piercing member 22 is bendable and deformable. Specifically, the distal end 22a of the piercing member 22 is provided with a bendable structure 211. Fig.10The bendable structure 211 can bend and deform the distal end 22a of the puncture member 22, so as to adjust the orientation of the distal end face of the puncture member 22. The bendable structure 211 is directly opposite to the distal end of the outer tube member 21. When the puncture assembly 20 is in the receiving state, the bendable structure 211 is received in the distal end of the outer tube member 21. It can be understood that the shape of the bendable structure 211 can be spiral or dovetail. It can be understood that in other embodiments, the shape of the bendable structure 211 is not limited, and the bendable distal end of the puncture member 22 shall prevail. In this embodiment, the puncture member 22 adjusts its shape by the bending adjustment assembly 30. In other embodiments, the puncture member 22 can be prefabricated and deformed, that is, it is already in a bent state before being inserted into the human body.

[0094] In this embodiment, the puncture member 22 is in the shape of a hollow tube. The end surface of the distal end 22a of the puncture member 22 is concave toward the proximal end of the puncture member 22 to form an inclined puncture surface, which is provided with a sharp corner to facilitate stress concentration and improve puncture efficiency.

[0095] Second embodiment

[0096] See also Fig.11a , Fig.11b , Fig.11c and Fig.12 The puncture system 1a provided in this embodiment is substantially the same as that in the first embodiment, except that, in this embodiment, the bending adjusting member 33a is elastic. The bending adjusting member 33a is in a hollow tubular shape. The bending adjusting member 33a is disposed in the distal end 210a of the outer tube 210. The traction member 31a is connected between the adjusting member (not shown) and the bending adjusting member 33a.

[0097] The handle assembly includes a bending control member (not shown), which is used to control the bending of the distal end of the outer tube member 21. The specific structure of the bending control member can refer to the second control member in the first embodiment. The bending control member is threadedly connected to the adjusting member, and the bending control member rotates relative to the handle assembly (not shown), which can drive the adjusting member and the traction member 31a to slide relative to the handle assembly. When the bending control member drives the adjusting member and the traction member 31a to slide toward the proximal end of the handle assembly, the bending control member 33a bends in a direction close to the proximal end of the handle assembly, so that the distal end of the outer tube member 210 and the distal end of the puncture member 220 bend in a direction close to the proximal end of the handle assembly. It can be understood that the traction member 31a is formed of an elastic metal or non-metallic material such as nickel-titanium wire.

[0098] In this embodiment, the distal end 210a of the outer tube 210 includes a main body 2101 and a support portion 2102 connected to the main body 2101. The support portion 2102 protrudes along the proximal end away from the outer tube 210. The bending adjusting member 33a is sleeved on the outer surface of the support portion 2102. The radially inward projection of the bending adjusting member 33a falls on the radially inward projection of the support portion 2102.

[0099] The outer tube 210 is provided with a first through hole 211. The first through hole 211 penetrates the proximal end of the outer tube 210 and the distal end 210a of the outer tube 210. That is, the first through hole 211 penetrates the main body 2101 and the support part 2102. The first through hole 211 is used to accommodate the puncture member 220.

[0100] The outer tube 210 is also provided with an outer tube channel 212, and the outer tube channel 212 is spaced apart from the first through hole 211. The outer tube channel 212 passes through the main body 2101. The outer tube channel 212 is provided in the outer tube 210, and the extension direction of the outer tube channel 212 is the same as the extension direction of the first through hole 211. The distal end of the traction member 31a extends along the outer tube channel 212 through the side wall of the outer tube 210 to the bending member 33a, and is fixedly connected to the bending member 33a. In other embodiments, the bending member 33a can be omitted. In this case, the traction member 31a is directly fixed to the distal end 210a of the outer tube 210, and the traction member 31a pulls the distal end 210a of the outer tube 210 to bend. In other embodiments, the traction member 31a is directly fixed to the distal end 210a of the outer tube 210 and is not connected to the bending member 33a. The traction member 31a pulls the distal end 210a of the outer tube 210 to bend under the action of external force, and the bending member 33a bends together with the outer tube 210. After the external force is removed, the bending member 33a returns to its original shape, and the elastic force of the bending member 33a also makes the outer tube 210 return to its original shape.

[0101] In this embodiment, the handle assembly further includes an isolating member 19a, which is a hollow tubular structure. The isolating member 19a is disposed on the outer wall of the bending adjusting member 33a. The isolating member 19a is formed of a polymer material. Part of the traction member 31a is accommodated in the isolating member 19a. The distal end of the traction member 31a passes through the inner cavity of the isolating member 19a and is fixedly connected to the support portion 2102.

[0102] In this embodiment, the distal end 210a of the outer tube 210 further includes a covering portion 2103. The covering portion 2103 covers the isolating member 19a, and the covering portion 2103 covers the portion of the supporting portion 2102 that is exposed from the main body 2101. The proximal end of the covering portion 2103 is flush with the distal end of the main body 2101, thereby avoiding a height difference between the covering portion 2103 and the main body 2101 that affects the withdrawal of the outer tube 210 from the human body.

[0103] The covering portion 2103 also covers the outer wall of the bending adjuster 33 a , so that the bending adjuster 33 a is stably accommodated in the outer tube 210 , thereby preventing the bending adjuster 33 a from falling off from the outer tube 210 .

[0104] In this embodiment, the isolation member 19a separates the traction member 31a and the covering portion 2103, and the portion of the traction member 31a in the inner cavity of the isolation member 19a can move relative to the isolation member 19a, thereby preventing the portion of the traction member 31a covered by the covering portion 2103 from being supported and limited by the covering portion 2103 and unable to slide relative to the isolation member 19a, so that the support portion 2102 cannot bend.

[0105] In this embodiment, the material of the cover 2103 is the same as the material of the main body 2101, both of which are polymer materials. The cover 2103 can be fused with the main body 2101 in a molten state. In other embodiments, the material of the cover 2103 can be different from the material of the main body 2101.

[0106] In this embodiment, the melting point of the covering portion 2103 is lower than the melting point of the isolating member 19a. In the process of the covering portion 2103 being fused with the main body 2102 in a molten state, the isolating member 19a will not be melted, thereby preventing the melted covering portion 2103 from completely fixing the traction wire 31a in the isolating member 19a to the isolating member 19a as a whole. Preferably, in this embodiment, the proximal end of the isolating member 19a is farther away from the distal end of the outer tube member 210 than the proximal end of the bending adjusting member 33a, thereby preventing the covering portion 2103 from covering the proximal end face of the isolating member 19a, thereby more effectively preventing the melted covering portion 2103 from completely fixing the traction wire 31a in the isolating member 19a to the isolating member 19a as a whole.

[0107] In this embodiment, the distal end of the traction member 31a passes through the distal end of the isolation member 19a and is covered and fixed by the covering portion 2013. When the traction member 31a is pulled, the traction member 31a can slide in the isolation member 19a toward the proximal end of the handle assembly, and the distal end of the traction member 31a pulls the covering portion 2103, so that the bending member 33a and the support portion 2102 are bent toward the proximal end of the handle assembly. In other embodiments, the distal end of the traction member 31a passes through the isolation member 19a and is fixedly connected to the bending member 33a. When the traction member 31a is pulled, the distal end of the traction member 31a pulls the bending member 33a, so that the bending member 33a and the support portion 2102 are bent toward the proximal end of the handle assembly.

[0108] See also Fig.12 The outer wall of the bending adjusting member 33a has a plurality of elastic parts 330a and a plurality of opening parts 330b. Each opening part 330b is connected between two adjacent elastic parts 330a. The opening part 330b is a groove structure opened on the bending adjusting member 33a. The opening part 330b can reduce the rigidity of the bending adjusting member 33a, making the bending adjusting member 33a easier to bend.

[0109] Furthermore, when the second control member drives the adjusting member 31a to slide toward the proximal end of the outer tube 210, adjacent elastic portions 330a approach each other, and the opening 330b between two adjacent elastic portions 330a gradually shrinks, so that the bending adjusting member 33a is deformed and bent as a whole.

[0110] In this embodiment, the number of openings 330b distributed per unit length gradually increases from the proximal end 331 of the bending member to the distal end 332 of the bending member. The stiffness of the bending member 33a gradually decreases from the proximal end 331 of the bending member to the distal end 332 of the bending member. The bending member 33a is easier to bend from the proximal end 331 of the bending member to the distal end 332 of the bending member. In other embodiments, the number of openings 330b distributed per unit length remains unchanged from the proximal end 331 of the bending member to the distal end 332 of the bending member.

[0111] Third embodiment

[0112] See also Fig.13 The puncture system 1b provided in this embodiment is substantially the same as that in the second embodiment, except that a plurality of openings 340b are connected and spirally extend along the outer wall of the bending adjusting member 330 to form a whole.

[0113] The pitch of two adjacent openings 340b gradually decreases in the direction from the proximal end 3301 of the bending member to the distal end 3302 of the bending member. The rigidity of the bending member 330 gradually decreases from the proximal end 3301 of the bending member to the distal end 3302 of the bending member, and the bending member 330 is easier to bend in the direction from the proximal end 3301 to the distal end 3302. In other implementations, the pitch of the opening 340b remains unchanged in the direction from the proximal end 3301 to the distal end 3302 of the bending member 330.

[0114] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0115] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A puncture system, characterized in that: include: A handle assembly, the handle assembly comprising a handle body and a second control member, the handle body having a receiving member, the handle body comprising a first handle member and a second handle member connected to the first handle member, the receiving member being a receiving space enclosed by the first handle member and the second handle member, the first handle member and the second handle member both being provided with a notch, the notch being formed by a portion of the outer surface of the first handle member or a portion of the outer surface of the second handle member being radially concave inward, the second control member being placed on the notch, and two opposite side walls of the notch being used to limit the axial travel of the second control member; A puncture assembly, the puncture assembly is partially received in the receiving member and connected to the handle assembly, comprising a puncture member and an outer tube member in a hollow tubular shape, at least a portion of the puncture member is received in the outer tube member; A bending adjustment component, the bending adjustment component includes an adjusting member, a bending adjustment member and a traction member, the adjusting member is slidably arranged in the receiving member, the adjusting member is sleeved on the outer wall of the outer tube member and can slide on the outer tube member, the bending adjustment member is arranged in the distal end of the outer tube member, and the traction member is connected between the bending adjustment member and the adjusting member; the second control member includes a second clamping portion and a connecting thread, the second clamping portion is connected to the outer tube member through a second fixing member to drive the outer tube member to slide relative to the handle body; part of the adjusting member extends from the receiving member and is threadedly connected to the connecting thread in the second control member; when the second control member abuts against the side wall of the proximal end and rotates relative to the axis of the handle assembly, it can drive the adjusting member to slide on the outer wall of the outer tube member relative to the handle body, thereby allowing the puncture assembly to bend and deform relative to the handle assembly.

2. The puncture system according to claim 1, characterized in that: The proximal end of the puncture member passes through the proximal end of the outer tube member, the distal end of the puncture member can move relative to the outer tube member, and the outer tube member is connected to the handle assembly.

3. The puncture system according to claim 1, characterized in that: The distal end of the outer tube comprises a main body and a support portion connected to the main body, the support portion protrudes along the proximal end away from the handle assembly, and the bending adjusting piece is sleeved on the outer surface of the support portion.

4. The puncture system according to claim 3, characterized in that: The distal end of the outer tube also includes a covering portion, and the covering portion covers the supporting portion and the bending adjusting member.

5. The puncture system according to claim 4, characterized in that: The handle assembly also includes an isolating member, which is a hollow tubular structure and is disposed on an outer wall of the bending adjusting member. The covering portion covers the outer wall of the isolating member, and the traction member can slide relative to the handle assembly in the inner cavity of the isolating member.

6. The puncture system according to claim 5, characterized in that: The covering portion has a melting point lower than a melting point of the separator.

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