Puncture system

Abstract

A puncture system (100) comprising a catheter (20), a handle (30), and a puncture needle (10). A proximal end of the catheter (20) extends into the handle (30) and is fixedly connected to the handle (30). A puncture channel (21) penetrating through a distal end and the proximal end of the catheter (20) and at least one traction channel (22) are provided in the catheter (20); at least one guiding wire channel (33) is provided in the handle (30); one of the guiding wire channels (33) is in communication with one of the traction channels (22); at least part of the puncture needle (10) is arranged in the puncture channel (21) and can axially move relative to the catheter (20), and a distal end of the puncture needle (10) can extend out of an end surface at the distal end of the catheter (20); the guiding wire channel and the traction channel (22) in communication can allow the guiding wire (200) to pass through, both ends of the guiding wire (200) can extend out and be exposed out of the distal end of the catheter (20) and the handle (30), respectively, and parts exposed out of the distal end of the catheter (20) and the handle (30) are a distal exposed part and a proximal exposed part, respectively; the distal end of the catheter (20) can be adjusted by pulling the distal exposed part and / or the proximal exposed part to have the puncture needle (10) placed in the puncture channel (21) reach a preset puncture posture.

Description

Puncture system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application entitled “A Puncture System” with application number 202311232336.6, filed with the State Intellectual Property Office of China on September 21, 2023. The entire contents of the application are incorporated herein by reference. Technical Field

[0003] The present invention relates to the field of medical devices, and in particular to a puncture system. Background Art

[0004] The use of covered stents for intravascular repair of aortic diseases can restore patency to the diseased part of the aorta, for example, improving poor blood flow and limb ischemia caused by vascular stenosis, occlusion, etc. However, the use of covered stents in special lesions such as the aortic arch, celiac artery, bilateral renal arteries, or superior mesenteric artery will affect the blood supply to the arterial branch vessels. During the operation, it is necessary to perform an in situ window operation on the covered stent to create the expected hole in the covered stent, and then deliver the branch stent to the hole and dock with the covered stent. The above method can overcome the dependence of the treatment plan on the anatomical structure of the human branch blood vessels, shorten the operation time, and reduce the risk of infection.

[0005] Currently, mechanical fenestration is used to perform in situ fenestration on the covered stent after implantation in the blood vessel. Usually, after the covered stent is implanted, a puncture instrument is sent through the brachial / carotid artery to the connection between the branch vessel to be windowed and the main vessel, and a puncture needle is used to physically puncture the stent covering. A guide wire is inserted into the stent covering from the puncture needle cavity. After the puncture instrument is withdrawn while retaining the guide wire, a balloon is used to enter along the guide wire and expand the stent opening to obtain the expected hole. However, how to ensure and position the direction and angle of the puncture needle has always been a problem, especially for some blood vessels with more twisted shapes, such as the branch blood vessels and the aortic arch blood vessels, which have a small angle. In some cases, the angle between the branch blood vessels and the aortic arch blood vessels is less than 30°. Under the influence of the branch blood vessels, the puncture needle of the existing puncture instrument also has a small angle between the puncture needle and the surface of the coated stent, causing the needle tip of the puncture needle to move relative to the surface of the coated stent at a small puncture angle during the puncture action, which can easily cause the window to deviate from the target position, or even cause the needle tip to slip on the surface of the coated stent, causing the needle tip to deviate to one side of the coated stent, resulting in failure to rupture the membrane and further the possibility of injuring the blood vessel wall. Therefore, how to quickly adjust and control the puncture angle of the puncture needle is particularly important. Summary of the Invention

[0006] The present invention provides a puncture system, which aims to quickly adjust the puncture angle of a puncture needle to reduce the risk of membrane rupture.

[0007] The present invention solves the technical problem by the following technical solutions:

[0008] The present invention provides a puncture system, comprising a catheter, a handle, and a puncture needle. The proximal end of the catheter extends into the handle and is fixedly connected to the handle. The catheter is provided with a puncture channel and at least one traction channel that penetrates the distal and proximal ends of the catheter. The handle is provided with at least one guidewire channel. The distal end of one guidewire channel is opposite to and communicates with the proximal end of one traction channel. At least a portion of the puncture needle is disposed in the puncture channel and is axially movable relative to the catheter. The distal end of the puncture needle is capable of extending beyond the distal end surface of the catheter.

[0009] The guidewire channel and the traction channel are connected to each other so that the distal end of the guidewire can pass through in sequence, and the two ends of the guidewire can be extended and exposed to the distal end of the catheter and the handle respectively, and the parts exposed to the distal end of the catheter and the handle are the distal exposed part and the proximal exposed part respectively;

[0010] Pulling the distal exposed leak portion and / or the proximal exposed leak portion can adjust the direction of the distal end of the catheter so that the needle head of the puncture needle placed in the puncture channel reaches a preset puncture posture.

[0011] In some embodiments of the present invention, a plurality of traction channels are provided in the catheter, and the plurality of traction channels are arranged at intervals along the circumference of the catheter. A plurality of guidewire channels are provided in the handle, and the plurality of traction channels are arranged one by one opposite to the plurality of guidewire channels. The plurality of relative traction channels and guidewire channels can allow a plurality of guidewires to pass through in sequence, and the exposed leakage parts of the plurality of guidewires can be pulled to adjust the direction of the distal end of the catheter at multiple angles so that the needle tip of the puncture needle reaches a preset puncture posture.

[0012] In some embodiments of the present invention, the catheter comprises a distal segment and a proximal segment, the proximal end of the distal segment is connected to the distal end of the proximal segment, and the bending performance of the distal segment is higher than the bending performance of the proximal segment;

[0013] And / or, the puncture needle includes a supporting portion and a puncture portion connected to a distal end of the supporting portion, and the bending performance of the supporting portion is higher than that of the puncture portion.

[0014] In some embodiments of the present invention, a plurality of protrusions are provided on the inner wall of at least the distal end of the traction channel. The plurality of protrusions are arranged in sequence along the circumference of the inner wall of the traction channel, and the guide wire can be inserted between two adjacent protrusions.

[0015] In some embodiments of the present invention, at least a portion of the guidewire channel has a curved structure.

[0016] In some embodiments of the present invention, the puncture system further includes an adjustment mechanism, which is at least partially disposed within the handle and connected to the proximal end of the puncture needle, and is used to control the distance by which the distal end of the puncture needle extends beyond the distal end of the catheter.

[0017] In some embodiments of the present invention, the adjustment mechanism includes a moving assembly, the proximal end of the puncture needle is connected to the moving assembly, and the moving assembly has at least one quantitative moving distance along the axial direction of the puncture needle relative to the handle.

[0018] In some embodiments of the present invention, the adjustment mechanism also includes a limit assembly, the limit assembly includes a limit part movably provided on the handle, the moving assembly includes a moving part that can move relative to the handle along the axial direction of the puncture needle, the proximal end of the puncture needle is connected to the moving part, and as the limit part moves, the limit part and the moving part have multiple abutment states at multiple different positions along the axial direction of the puncture needle, so that the moving assembly has multiple quantitative moving distances along the puncture needle.

[0019] In some embodiments of the present invention, the limiting member can be moved relative to the handle along the radial direction of the puncture needle, one of the limiting member and the movable member is provided with multiple first limiting parts, and the other of the two is provided with a second limiting part that cooperates with the stop of the first limiting part along the axial direction of the puncture needle. The multiple first limiting parts are respectively located at different positions along the axial direction of the puncture needle. As the limiting member moves to different positions relative to the handle along the radial direction, the second limiting part can respectively cooperate with different stops of the first limiting part, so that the limiting member and the movable member have multiple abutment states at multiple different positions along the axial direction of the puncture needle.

[0020] In some embodiments of the present invention, the limiting member can rotate around the axis of the puncture needle relative to the handle, and a plurality of first limiting portions are provided at the proximal end of the limiting member. The plurality of first limiting portions are arranged in sequence along the circumferential direction of the limiting member and are arranged in a stepped manner. The movable member is provided with a second limiting portion. As the limiting member rotates to different positions relative to the handle along the circumferential direction of the puncture needle, the second limiting portion can respectively cooperate with different stops of the first limiting portion, so that the limiting member and the movable member have multiple abutment states at multiple different positions along the axial direction of the puncture needle.

[0021] In some embodiments of the present invention, the handle has a accommodating cavity, and the inner wall of the accommodating cavity is protruded with a locking portion; the puncture system also includes a locking assembly, and the locking assembly includes a locking piece, an elastic piece and an unlocking key. The locking piece and the elastic piece are arranged in the accommodating cavity, the elastic piece is arranged along the radial direction of the puncture needle, and the two ends of the elastic piece are respectively connected to the locking piece and the movable assembly, one end of the unlocking key is connected to the locking piece, and the other end of the unlocking key extends out of the accommodating cavity; the unlocking key and the elastic piece can respectively drive the unlocking key to switch between an unlocking position and a locking position. In the locked position, the locking piece is connected to the locking portion to lock the movable assembly, and in the unlocking position, the locking piece is separated from the locking portion to unlock the movable assembly.

[0022] In some embodiments of the present invention, the moving assembly includes a support member, the support member is provided with a first guide portion extending radially along the puncture needle, the locking member is provided with a second guide portion extending radially along the puncture needle, one of the first guide portion and the second guide portion is slidably mounted outside the other, the elastic member is mounted on the outside of the first guide portion and the second guide portion, or the elastic member is mounted on the inside of the first guide portion and the second guide portion, and both ends of the elastic member are respectively in contact with the support member and the locking member.

[0023] The puncture system of the present invention is equipped with a puncture channel and a traction channel in the catheter at the same time. By pulling the two ends of the guide wire passing through the traction channel to adjust the position and direction of the distal end of the puncture system catheter, the needle head of the puncture needle placed in the catheter can be quickly adjusted to reach a preset puncture posture, reducing the risk of membrane rupture and the difficulty of surgery, and improving the position accuracy and success rate of the fenestration of the coated stent. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0025] FIG1 is a schematic structural diagram of an exemplary puncture system of the present invention;

[0026] FIG2 is a cross-sectional schematic diagram of a catheter in an exemplary puncture system of the present invention;

[0027] FIG3 is a partial cross-sectional view of a catheter in an exemplary puncture system of the present invention;

[0028] FIG4 is a schematic diagram of a partial explosion of the puncture system in FIG1 ;

[0029] 5 to 14 are schematic diagrams of another exemplary structure of the puncture system of the present invention;

[0030] 15 to 22 are schematic diagrams of another exemplary structure of the puncture system of the present invention;

[0031] FIG23 is a schematic structural diagram of an exemplary puncture needle of the present invention;

[0032] 24 and 25 are schematic diagrams of another exemplary structure of the puncture system of the present invention;

[0033] FIG26 is another schematic structural diagram of an exemplary puncture system of the present invention;

[0034] FIG. 27 is another schematic structural diagram of an exemplary catheter of the present invention.

[0035] The symbols in the accompanying drawings represent as follows: 100, puncture system; 10, puncture needle; 11, puncture portion; 12, support portion; 20, catheter; 21, puncture channel; 22, traction channel; 221, first opening; 222, protrusion; 30, handle; 31, first housing; 311, locking portion; 32, second housing; 33, guidewire channel; 331, third opening; 332, curved section; 333, straight section; 34, accommodating chamber; 35, slide groove; 36, catheter chamber; 37, guide channel; 38, puncture needle chamber; 40, adjustment mechanism; 401, first limiting portion; 402, second limiting portion; 41, moving assembly; 411, moving member; 412, support member; 4121, first guide portion; 42, limiting assembly; 421, limiting member; 50. Locking assembly; 51. Locking member; 511. Second guide portion; 52. Elastic member; 53. Unlocking key; 301a. Through slot; 301b. Clamping slot; 421a. Main body; 421b. Clamping portion; 411a. Main body; 411b. Abutting portion; 413a. Nut; 3101. First partition; 3102. Second partition; 3103. First slide groove; 3104. Second slide groove; 341. Lower space; 342. Middle space; 343. Upper space; 413b. Pushing slider; 421c. Shift bar; 421d. First adjustment portion; 421d1. First inclined surface; 4211c. Support column; 43b. Adjusting key; 43b1. Key body; 43b2. Second adjustment portion; 43b21. Second inclined surface; 44b. Return spring; 3401, sliding limit portion; 43c, adjustment knob; 3105, third slide groove; 31051, through hole; 3106, fourth slide groove; 421e, sliding portion; 421f, limit slider; 3402, rotation limit portion; 4212, through hole; 4213, toggle roller; 4214, locking groove; 39, locking buckle; 413c, push block; 412a, tubular portion; 412a1, first limit groove; 412b, wing portion; 512, second limit groove; 531, unlocking key body; 532, plug-in portion; 511a, plug-in groove; 200, guide wire. DETAILED DESCRIPTION

[0036] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0037] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0038] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0039] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teachings of the exemplary embodiments.

[0040] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0041] It should be noted that the terms "distal" and "proximal" are commonly used in the field of interventional medical devices. "Distal" refers to the end away from the operator during surgery, while "proximal" refers to the end closer to the operator. Axial refers to the direction parallel to the line connecting the distal and proximal centers of the medical device; radial refers to the direction perpendicular to the axial direction.

[0042] As shown in Figures 1 and 2, the present invention proposes a puncture system 100, which includes a catheter 20, a handle 30 and a puncture needle 10. The proximal end of the catheter 20 extends into the handle 30 and is fixed to the handle 30. The catheter 20 is provided with a puncture channel 21 and at least one traction channel 22 that passes through the distal and proximal ends of the catheter. The handle 30 is provided with at least one guidewire channel 33. The distal end of a guidewire channel 33 is opposite to and communicates with the proximal end of a traction channel 22. At least part of the puncture needle 10 is arranged in the puncture channel 21 and can move axially relative to the catheter 20. During the movement, the distal end of the needle 10 can extend out of the distal end face of the catheter 20; wherein, the interconnected guidewire channel 33 and the traction channel 22 can allow the guidewire 200 to pass through in sequence, and the two ends of the guidewire 200 can be extended and exposed to the distal end of the catheter 20 and the outside of the handle 30, respectively. The parts exposed to the distal end of the catheter 20 and the outside of the handle 30 are the distal exposed portion and the proximal exposed portion, respectively; pulling the distal exposed portion and / or the proximal exposed portion can adjust the orientation of the distal end of the catheter 20, so that the needle tip of the puncture needle 10 placed in the puncture channel 21 reaches a preset puncture posture. The preset puncture posture of the present invention refers to making the needle tip of the puncture needle perpendicular to the surface of the coated stent, or the angle between the needle tip of the puncture needle and the surface of the coated stent is close to the vertical within a preset angle range. Exemplarily, the preset angle range is that the angle between the needle tip of the puncture needle and the coated stent is greater than 50°.

[0043] In some embodiments, the distal end of the traction channel 22 forms a first opening 221 on the distal end face of the catheter 20, and the proximal end of the traction channel 22 forms a second opening on the proximal end face of the catheter 20 or the outer peripheral surface of the catheter 20, wherein the traction channel 22 allows the guidewire 200 to pass through, and the first opening 221 and the second opening allow the distal end and proximal end of the guidewire 200 to extend from the traction channel 22, respectively. Specifically, the portion of the guidewire 200 exposed outside the first opening 221 is the distal exposed portion, and the portion of the guidewire 200 exposed outside the second opening is the proximal exposed portion. By pulling the distal exposed portion and / or the proximal exposed portion, the orientation of the distal end of the catheter 20 can be adjusted so that the needle tip of the puncture needle 10 placed in the puncture channel 21 reaches a preset puncture posture, so that the distal end of the puncture needle 10 and the outer surface of the coated stent have a better relative angle. For example, if it is found during puncture that the angle between the puncture needle 10 and the object to be punctured (such as the coated stent) is small, the puncture is more difficult. , the proximal exposed portion exposed on the proximal end face of the catheter 20 and / or the distal exposed portion exposed on the distal end face of the catheter 20 can be pulled to adjust the orientation of the catheter 20, thereby adjusting the orientation of the needle tip of the puncture needle 10 placed in the puncture channel 21 so that it can be opposite to the preset puncture position, making the position accuracy of the window position more accurate, reducing the difficulty of puncture, reducing the probability of the needle tip of the puncture needle 10 slipping on the surface of the coated stent, preventing the needle tip from deviating to one side of the coated stent, thereby further reducing the possibility of the needle tip of the puncture needle 10 injuring the blood vessel wall.

[0044] In detail, taking the endovascular repair surgery of the left subclavian artery as an example, the guide wire 200 is first pulled out from the femoral / brachial artery through the other side through a device such as a catcher, establishing a path from the brachial artery through the aortic arch branch to the aortic arch and along the aorta to the femoral artery. Generally, the proximal end of the guide wire 200 is exposed outside the entrance of the brachial artery, and the distal end of the guide wire 200 is exposed outside the exit of the femoral artery, so that the proximal and distal ends of the guide wire can be pulled. Usually, a loach guide wire 200 is used to ensure that it can normally adapt to various vascular morphologies. Secondly, the covered stent is implanted in the position of the aortic arch corresponding to the left subclavian artery. At this time, the covered stent covers the left subclavian artery. Then, the proximal end of the guidewire 200 at the brachial artery is passed through the first opening 221 into the traction channel 22 of the catheter 20 and out from the second opening. The catheter 20 is introduced along the guidewire 200 until the port of the catheter 20 is observed to be close to the stent coating under the left subclavian artery. By pulling the proximal or distal exposed portion of the guidewire 200, the relative angle between the distal end of the catheter 20 and the stent coating is adjusted in a tightening or loosening manner until it is confirmed from multiple directions that the distal end of the catheter 20 is perpendicular to the stent coating. Finally, the puncture needle 10 is pushed toward the distal end so that the needle tip of the puncture needle 10 pierces the distal end face of the catheter 20. After piercing the coating, a guidewire for guiding the branch stent is inserted through the hole in the puncture needle 10 and the distal end of the guidewire is sent into the stent coating to complete the in situ window operation.

[0045] Compared with traditional in situ fenestration instruments, the puncture system 100 proposed in the present invention can adjust the relative angles of some blood vessels in the body by pulling the guide wire 200. At the same time, since the catheter 20 is provided with a traction channel 22, there is no need to add an additional outer sheath to wrap the outer surface and then add the traction channel 22. Compared with traditional in situ fenestration instruments using matching guide wire instruments of the same specifications, the overall outer diameter of the puncture system proposed in the present invention is smaller, so that it is easier to enter thinner blood vessels and can reduce the size of the incision of the interventional surgery.

[0046] Furthermore, in some embodiments, the catheter 20 is provided with multiple traction channels 22, with any two of the multiple traction channels 22 spaced apart along the circumference of the catheter 20. The multiple traction channels 22 allow multiple guidewires 200 to pass through, respectively, and can pull the proximal and / or distal ends of the multiple guidewires 200 to adjust the orientation of the distal end of the catheter 20 and the distal end of the puncture needle 10 at multiple angles. In this embodiment, the term "multiple" refers to at least two.

[0047] In other embodiments, as shown in FIG27 , a plurality of protrusions 222 are provided on the inner wall of at least the distal traction channel 22. The plurality of protrusions 222 are arranged in sequence along the circumference of the traction channel, and a guide wire can be inserted between two adjacent protrusions 222. The protrusions 222 are elastic. When the distal exposed portion and / or the proximal exposed portion of the guide wire 200 are pulled to adjust the orientation of the distal end of the catheter 20 and the puncture posture of the needle tip of the puncture needle 10, the guide wire 200 moves axially within the traction channel 22. By providing a plurality of protrusions 222, when the guide wire 200 is pulled, the guide wire 200 is affected by the tension and deflected toward one side of the traction channel 22 along the radial direction of the traction channel 22. The elastic protrusions 222 are deformed, and the guide wire 200 is clamped in the gap between two adjacent protrusions 222. The protrusions 222 Under the extrusion of the guide wire, elastic deformation is generated and the elastic force is reacted to the guide wire 200, so that a large friction force is generated between the guide wire 200 and the protrusion 222 during the axial movement in the traction channel. Therefore, when the distal exposed part or the proximal exposed part of the guide wire 200 is pulled, the interaction force between the protrusion 222 and the guide wire is utilized to make the traction force of the guide wire act better on the catheter, and at the same time, a certain limit is placed on the circumference of the guide wire, thereby efficiently adjusting the direction of the distal end of the catheter 20, so that the needle head of the puncture needle 10 placed in the puncture channel 21 reaches a preset puncture posture.

[0048] In some embodiments, the protrusion 222 is conical and has a certain elastic deformation capability. When the guidewire applies pressure to the protrusion 222, the protrusion 222 elastically deforms. The multiple protrusions 222 are arranged in sequence along the circumference and axial direction of the traction channel, so that the protrusions 222 are evenly distributed throughout a portion or the entire guidewire channel.

[0049] Exemplarily, the catheter 20 includes a distal segment and a proximal segment, the proximal end of the distal segment is connected to the distal end of the proximal segment, and the bending performance of the distal segment is higher than that of the proximal segment. When the proximal exposed portion or the distal exposed portion of the guide wire is pulled, since the distal segment of the catheter 20 has a higher bending performance than the proximal segment, the distal segment is easier to bend under the traction of the guide wire, so as to facilitate controlling the degree of bending deformation of the distal segment by finely adjusting the moving distance of the guide wire, thereby adjusting the direction of the distal end of the catheter 20, changing the angle between the distal end of the catheter 20 and the outer surface of the coated stent, so that the needle head of the puncture needle 10 placed in the puncture channel 21 and the outer surface of the coated stent have a better relative angle. It should be noted that the distal segment of the catheter 20 has higher bending performance. In the process of adjusting the distal orientation angle of the catheter 20, the bending deformation of the catheter 20 is mainly concentrated in the distal segment, and the deformation of the catheter 20 is concentrated in the local area, which reduces the impact of the overall bending deformation of the catheter 20 on the branch blood vessels. In addition, the branch blood vessels where the catheter 20 is located have smaller restraint resistance to the deformation of the catheter 20, reducing the difficulty of adjusting the distal orientation of the catheter 20.

[0050] In some embodiments, the proximal segment and the distal segment are made of the same material, but the wall thickness of the distal segment is thinner than that of the proximal segment, thereby making the bending performance of the distal segment higher than that of the proximal segment, that is, the distal segment has better flexibility than the proximal segment. In some embodiments, the tube wall of the distal segment is provided with a plurality of grooves, wherein the grooves are grooves extending in the circumferential direction of the distal segment, and the plurality of grooves are staggered in sequence along the axial direction of the distal segment. In some embodiments, the proximal segment and the distal segment are made of different materials, and the hardness and rigidity of the material of the proximal segment are higher than those of the distal segment, thereby making the bending performance of the distal segment higher than that of the proximal segment. The proximal segment and the distal segment are connected to form an integrated structure by laser welding, fusion bonding, or adhesive bonding.

[0051] Furthermore, as shown in FIG23 , the puncture needle 10 includes a puncture portion 11 and a support portion 12 connected to the proximal end of the puncture portion 11. The support portion 12 has a higher bending performance than the puncture portion 11. The support portion 12 has a higher bending performance relative to the puncture portion 11, enabling the support portion 12 to conform to the curved structure of the distal segment of the catheter 20, allowing the puncture portion 11 to smoothly pass through the distal segment of the catheter 20 and puncture from the distal end face of the catheter 20. The puncture portion 11 has greater hardness, rigidity, and bending resistance than the support portion 12. During the process of pushing the puncture portion 11 to the distal end face of the catheter 20 and performing the puncture action, the support portion 12 can provide sufficient pushing force to the puncture portion 11, ensuring that the puncture portion 11 can puncture the stent graft to complete the fenestration.

[0052] In some embodiments, the puncture portion 11 and the support portion 12 are made of the same material, but the wall thickness of the support portion 12 is less than that of the puncture portion 11, so that the bending performance of the support portion 12 is higher than that of the puncture portion 11, that is, the support portion 12 has better flexibility relative to the puncture portion 11. In some embodiments, the tube wall of the support portion 12 is provided with a plurality of hollow portions (not shown in the figure), and the hollow portions are long holes extending along the circumferential direction of the support portion 12, and the plurality of long hole portions are staggered in sequence along the axial direction of the support portion 12. In some embodiments, the puncture portion 11 and the support portion 12 are made of different materials, and the hardness and rigidity of the material of the puncture portion 11 are higher than the hardness and rigidity of the support portion 12. In the process of pushing the puncture portion 11 to the distal end face of the catheter 20 and performing the puncture action, the support portion 12 can provide sufficient pushing force to the puncture portion 11 to ensure that the puncture portion 11 can puncture the stent graft to complete the window. The puncture portion 11 and the support portion 12 are connected to form an integrated structure by laser welding, soldering or adhesive bonding.

[0053] Among them, the length of the distal segment can be selected within an appropriate range according to the diameter and length of the branch blood vessel where the catheter 20 is located. For example, when the stent graft covers the left subclavian artery and it is necessary to open a window on the stent graft at the connection position between the left subclavian artery and the aorta, the catheter 20 needs to be inserted into the left subclavian artery. Therefore, based on the diameter and length of the left subclavian artery, the length of the distal segment can be set to 10mm~50mm. For example, the length of the distal segment can be 10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, etc.

[0054] Referring to Figures 1, 4, 8, and 19, the present invention further provides a puncture system 100, which includes a catheter 20, a puncture needle 10, a handle 30, and an adjustment mechanism 40, wherein the adjustment mechanism 40 is movably disposed on the handle 30. Specifically, the catheter 20 is provided with a puncture channel 21 that passes through the distal and proximal ends of the catheter 20, and at least a portion of the puncture needle 10 is disposed within the puncture channel 21. The proximal end of the catheter 20 is connected to the handle 30, and the proximal end of the puncture needle 10 is connected to the adjustment mechanism 40. The adjustment mechanism 40 is used to drive the puncture needle 10 to move relative to the catheter 20 along the axial direction of the catheter 20, so that the distal end of the puncture needle 10 can extend beyond the distal end surface of the catheter 20 to facilitate fenestration of the coated stent.

[0055] In other embodiments, the catheter 20 is further provided with at least one traction channel 22 extending along the axial direction of the catheter 20. The distal end of the traction channel 22 forms a first opening 221 on the distal end surface of the catheter 20, and the proximal end of the traction channel 22 forms a second opening on the proximal end surface of the catheter 20 or the outer peripheral surface of the catheter 20. The traction channel 22 allows the guidewire 200 to pass through, and the first opening 221 and the second opening allow the distal end and proximal end of the guidewire 200 to extend from the traction channel 22, respectively. Specifically, the portion of the guidewire 200 exposed outside the first opening 221 is the distal exposed portion, and the portion of the guidewire 200 exposed outside the second opening is the proximal exposed portion. By pulling the distal exposed portion and / or the proximal exposed portion, the orientation of the distal end of the catheter 20 can be adjusted so that the needle tip of the puncture needle 10 placed in the puncture channel 21 reaches a preset puncture posture. In this embodiment, when the proximal end of the traction channel 22 forms a second opening on the proximal end surface of the catheter 20, at least one guidewire channel 33 is provided within the handle 30. The distal end of each guidewire channel 33 is opposite and communicates with the second opening of the traction channel 22. The guidewire channel 33 forms a third opening 331 in the handle 30, through which the proximal end of the guidewire 200 can extend. In this embodiment, the catheter 20 utilizes a dual-lumen tube, allowing for simultaneous passage of the puncture needle 10 and the traction guidewire 200. Furthermore, the guidewire 200 and the puncture mechanism share the same handle 30, reducing the need for additional instrumentation and simplifying the surgical procedure.

[0056] Furthermore, when the catheter 20 is provided with a plurality of traction channels 22, a plurality of guidewire channels 33 are provided in the handle 30. The plurality of traction channels 22 are opposite to the plurality of guidewire channels 33 one by one, and a plurality of guidewires 200 can be passed through in sequence, so that the proximal ends and / or distal ends of the plurality of guidewires 200 can be pulled to adjust the orientation of the distal end of the catheter 20 and the distal end of the puncture needle 10 at multiple angles.

[0057] In some embodiments, as shown in Figure 1, the adjustment mechanism 40 includes a moving component 41 having at least one quantitative moving distance relative to the handle 30 in the axial direction of the puncture needle 10. The proximal end of the puncture needle 10 is connected to the moving component 41, so that the puncture needle 10 has at least one quantitative moving distance along its own axial direction. Therefore, the adjustment mechanism 40 can control the distance that the distal end of the puncture needle 10 extends out of the distal end of the catheter 20, so that in the intravascular repair surgery, during the windowing operation of the coated stent, the adjustment mechanism 40 can be used to accurately and quantitatively control the puncture distance of the puncture needle 10 based on the diameter difference of the human blood vessels, as well as the size data of the coated stent, the puncture needle 10, etc. On the basis of successful rupture of the membrane, the probability of the needle tip causing puncture of the coated stent inner membrane and the blood vessel wall due to the excessive puncture length of the puncture needle 10 is reduced, thereby improving the success rate and safety of the intravascular repair surgery.

[0058] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0059] Example 1

[0060] In this embodiment, as shown in Figures 1 to 4, the puncture system 100 includes a catheter 20, a puncture needle 10, a handle 30 and an adjustment mechanism 40. The handle 30 includes a first shell 31 and a second shell 32 that are snap-fitted together. A accommodating cavity 34 is defined between the first shell 31 and the second shell 32, and at least part of the adjustment mechanism 40 is disposed in the accommodating cavity 34.

[0061] A puncture channel 21 is provided in the catheter 20, passing through the distal and proximal ends of the catheter 20. A catheter cavity 36 is provided in the handle 30 on the distal side of the accommodating cavity 34. The catheter cavity 36 extends in the axial direction, and the catheter cavity 36 forms an opening for inserting the catheter 20 at the distal end of the handle 30. A puncture needle cavity 38 is also provided on the handle 30 between the catheter cavity 36 and the accommodating cavity 34. The two ends of the puncture needle cavity 38 are respectively connected to the catheter cavity 36 and the accommodating cavity 34. The proximal end of the catheter 20 is inserted into the catheter cavity 36 and connected to the handle 30. The adjustment mechanism 40 includes a moving component 41 having at least a quantitative moving distance relative to the handle 30 in the axial direction of the puncture needle 10. The proximal end of the puncture needle 10 is arranged in the accommodating cavity 34 and is connected to the moving component 41. The distal end of the puncture needle 10 extends into the puncture channel 21 of the catheter 20 through the puncture needle cavity 38. When the adjustment mechanism 40 moves relative to the handle 30, the moving component 41 can drive the puncture needle 10 to move along the axial direction of the catheter 20 at a quantitative distance, so that the needle tip of the puncture needle 10 extends from the distal end face of the catheter 20 by a quantitative moving distance, thereby completing the puncture action.

[0062] In this embodiment, the puncture needle 10 has a hollow tubular structure, and a guide channel 37 is further provided in the handle 30 on the proximal side of the accommodating cavity 34. The proximal part of the movable component 41 is movably provided in the guide channel 37. The guide channel 37 extends along the axial direction of the puncture needle 10. The proximal end of the guide channel 37 forms an opening on the proximal end face of the handle 30. The distal end of the guide channel 37 is connected to the puncture needle 10 through the movable component 41. After the puncture needle 10 pierces the coating, the guide wire used to guide the branch stent is sequentially sent into the stent coating through the guide channel 37, the interior of the movable component 41 and the hole in the puncture needle 10.

[0063] In this embodiment, the catheter 20 is further provided with a traction channel 22 extending along the axial direction of the catheter 20. The distal end of the traction channel 22 forms a first opening 221 on the distal end face of the catheter 20, and the proximal end of the traction channel 22 forms a second opening on the proximal end face of the catheter 20. The handle 30 is further provided with a guidewire channel 33. The guidewire channel 33 is opposite to and communicates with the traction channel 22, so that the guidewire can pass through the traction channel 22 and the guidewire channel 33 in sequence.

[0064] In some embodiments, as shown in FIG17 , the guidewire channel 33 forms a third opening 331 on the proximal end face of the handle 30, so that the proximal exposed portion of the guidewire extends from the proximal end face of the handle 30. When the operator pulls the proximal exposed portion of the guidewire, the operator can pull the guidewire in the direction of the proximal end on the proximal side of the handle 30, which facilitates the operator to apply force. In this embodiment, the guidewire channel 33 includes a curved section 332 and a straight section 333, and the two ends of the curved section 332 are respectively connected to the pulling channel and the straight section 333, and the proximal end of the straight section 333 forms an opening on the proximal end face of the handle 30. The curved section 332 has a curved structure, which makes at least part of the section of the guidewire channel 33 have a curved structure, thereby reducing the possibility of blood being exposed through the guidewire channel 33 during surgery due to blood pressure.

[0065] In some embodiments, as shown in FIG8 , the guidewire channel 33 forms a third opening 331 on the outer circumference of the handle 30 , allowing the proximal exposed portion of the guidewire to extend from the outer circumference of the handle 30 . This allows the third opening 331 to be positioned as close as possible to the distal end of the handle 30 , maintaining a large distance between the third opening 331 and the movable assembly 41 in the adjustment mechanism 40 , thereby reducing interference between the two operations of pulling the proximal exposed portion of the guidewire and pushing the movable assembly 41 . In this embodiment, the guidewire channel 33 has an overall curved structure, which reduces the possibility of blood leaking through the guidewire channel 33 during surgery due to blood pressure.

[0066] It should be noted that, as shown in Figures 8 and 17, at least some segments of the guidewire channel 33 have a curved structure. When the guidewire is inserted into the guidewire channel 33, the guidewire generates multiple continuous bends in the curved guidewire channel 33 along with the curved shape of the guidewire channel 33, which increases the viscous resistance of liquid media such as blood when passing through the guidewire channel 33, thereby reducing the possibility of blood exposure.

[0067] Example 2

[0068] In this embodiment, the catheter 20 includes a distal segment and a proximal segment, the proximal end of the distal segment is connected to the distal end of the proximal segment, and the bending performance of the distal segment is higher than that of the proximal segment. When the proximal exposed portion or the distal exposed portion of the guide wire is pulled, since the distal segment of the catheter 20 has a higher bending performance than the proximal segment, the distal segment is easier to bend under the traction of the guide wire, so as to facilitate controlling the degree of bending deformation of the distal segment by finely adjusting the moving distance of the guide wire, thereby adjusting the direction of the distal end of the catheter 20, changing the angle between the distal end of the catheter 20 and the outer surface of the coated stent, so that the needle tip of the puncture needle 10 placed in the puncture channel 21 and the outer surface of the coated stent have a better relative angle. It should be noted that the distal segment of the catheter 20 has higher bending performance. In the process of adjusting the distal orientation angle of the catheter 20, the bending deformation of the catheter 20 is mainly concentrated in the distal segment, and the deformation of the catheter 20 is concentrated in the local area, which reduces the impact of the overall bending deformation of the catheter 20 on the branch blood vessels. In addition, the branch blood vessels where the catheter 20 is located have smaller restraint resistance to the deformation of the catheter 20, reducing the difficulty of adjusting the distal orientation of the catheter 20.

[0069] In some embodiments, the proximal segment and the distal segment are made of the same material, but the wall thickness of the distal segment is smaller than the wall thickness of the proximal segment, so that the bending performance of the distal segment is higher than the bending performance of the proximal segment, that is, the distal segment has better flexibility than the proximal segment.

[0070] In some embodiments, the tube wall of the distal segment is provided with a plurality of groove portions, which are grooves extending along the circumferential direction of the distal segment, and the plurality of groove portions are staggered in sequence along the axial direction of the distal segment.

[0071] In some embodiments, the proximal and distal segments are made of different materials, with the proximal segment's material having higher hardness and rigidity than the distal segment, resulting in a higher bending performance of the distal segment than the proximal segment. The proximal and distal segments are connected to form a one-piece structure by laser welding, soldering, or adhesive bonding.

[0072] Furthermore, as shown in FIG23 , the puncture needle 10 includes a support portion 12 and a puncture portion 11 connected to the distal end of the support portion 12. The support portion 12 has a higher bending performance than the puncture portion 11. The support portion 12 has a higher bending performance relative to the puncture portion 11, enabling the support portion 12 to conform to the curved structure of the distal segment of the catheter 20, allowing the support portion 12 to smoothly pass through the distal segment of the catheter 20 and puncture from the distal end face of the catheter 20. The puncture portion 11 has better hardness, rigidity, and bending resistance than the support portion 12. In the process of pushing the support portion 12 to the distal end face of the catheter 20 and performing the puncture action, the support portion 12 can provide sufficient pushing force to the puncture portion 11, ensuring that the puncture portion 11 can puncture the stent graft to complete the fenestration.

[0073] In some embodiments, the puncture portion 11 and the support portion 12 are made of the same material, but the wall thickness of the support portion 12 is smaller than the wall thickness of the puncture portion 11, so that the bending performance of the support portion 12 is higher than the bending performance of the puncture portion 11, that is, the support portion 12 has better flexibility than the puncture portion 11.

[0074] In some embodiments, the tube wall of the support portion 12 is provided with multiple hollow portions (not shown in the figure), which are long holes extending along the circumferential direction of the support portion 12, and the multiple long hole portions are staggered in sequence along the axial direction of the support portion 12.

[0075] In some embodiments, the puncture portion 11 and the support portion 12 are made of different materials, and the hardness and rigidity of the material of the puncture portion 11 are higher than the hardness and rigidity of the support portion 12, so that the bending performance of the support portion 12 is higher than the bending performance of the puncture portion 11. The puncture portion 11 and the support portion 12 are connected to form an integrated structure by laser welding, soldering or adhesive bonding.

[0076] Among them, the length of the distal segment can be selected within an appropriate range according to the diameter and length of the branch blood vessel where the catheter 20 is located. For example, when the stent graft covers the left subclavian artery and it is necessary to open a window on the stent graft at the connection position between the left subclavian artery and the aorta, the catheter 20 needs to be inserted into the left subclavian artery. Therefore, based on the diameter and length of the left subclavian artery, the length of the distal segment can be set to 10mm~50mm. For example, the length of the distal segment can be 10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, etc.

[0077] It should be noted that the structures of the catheter 20 and the puncture needle 10 of this embodiment can be combined separately or simultaneously with any of the aforementioned embodiments to form a solution with an adaptability effect, and the new solutions formed are all within the protection scope of this application.

[0078] Example 3

[0079] The following describes the differences between Example 3 and Examples 1 and 2. The similarities or similarities between Example 3 and Examples 1 and 2 are not repeated here. It should be understood that, in the absence of structural conflicts, the exemplary solution of this embodiment can be combined with any of the aforementioned embodiments to form a solution with an adaptable effect, and the resulting new solution is within the scope of protection of this application.

[0080] In this embodiment, please refer to Figures 1, 4, 8, 19, 24 and 26, the adjustment mechanism 40 includes a limit assembly 42 and a moving assembly 41, the limit assembly 42 includes a limit member 421 movably provided on the handle 30, the moving assembly 41 includes a moving member 411 that can move relative to the handle 30 in the axial direction of the puncture needle 10, the proximal end of the puncture needle 10 is connected to the moving member 411, and the limit member 421 that moves along the limit member 421 has multiple abutment states with multiple different positions along the axial direction with the moving member 411, so that the moving assembly 41 has multiple quantitative moving distances along the axial direction.

[0081] Specifically, the abutment state between the limiting member 421 and the moving member 411 along the axial direction means that: when the moving member 411 moves toward the distal side along the axial direction of the puncture needle 10, the distal end face on the moving member 411 abuts against the proximal end face of the limiting member 421, and the limiting member 421 prevents the moving member 411 from continuing to move toward the distal side, thereby making the moving member 411 have a directional movement distance.

[0082] Furthermore, the existence of multiple abutment states between the limiting member 421 and the movable member 411 along the axial direction means that the limiting member 421 and the movable member 411 are in abutment states at multiple different positions in the axial direction of the puncture needle 10, and different abutment states correspond to different directional movement distances of the movable member 411.

[0083] It can be understood that as the limiting member 421 moves relative to the handle 30, the relative position between the limiting member 421 and the handle 30 changes, and the abutment state of the limiting member 421 and the movable member 411 when they abut against each other also changes accordingly, so that the limiting member 421 and the movable member 411 have multiple abutment states.

[0084] Specifically, the stopper 421 can move in multiple ways relative to the handle 30. These ways include at least: the stopper 421 moving relative to the handle 30 along the axial direction of the puncture needle 10, the stopper 421 moving relative to the handle 30 along the radial direction of the puncture needle 10, or the stopper 421 rotating about its own axis relative to the handle 30 along the radial direction of the puncture needle 10. It is conceivable that each way the stopper 421 moves causes a change in the abutment state between the stopper 421 and the movable member 411. For example, when the stopper 421 is able to move relative to the handle 30 along the axial direction of the puncture needle 10, the stopper 421 can abut against the movable member 411 at multiple different positions in the axial direction, thereby enabling the movable member 411 to move a plurality of different quantitative distances in the axial direction.

[0085] For another example, when the limiting member 421 is able to move relative to the handle 30 along the radial direction of the puncture needle 10, the relative position between the limiting member 421 and the movable member 411 along the radial direction of the puncture needle 10 also changes accordingly, thereby causing the limiting member 421 and the movable member 411 to be in contact with each other at multiple different positions in the radial direction. When the multiple different positions are in different axial positions of the puncture needle 10, the movable member 411 can have multiple different quantitative moving distances in the axial direction.

[0086] Three specific implementation schemes of the limiting member 421 moving axially relative to the handle 30 , moving radially relative to the handle 30 , and rotating around its own axis will be described in detail below.

[0087] Example 3.1

[0088] In this embodiment, please refer to Figures 24, 25 and 26, the limiter 421 can move relative to the handle 30 along the axial direction of the puncture needle 10, and the limiter 421 and the handle 30 have multiple relative fixed positions arranged in sequence along the axial direction. When the limiter 421 is in multiple different fixed positions, the limiter 421 and the movable member 411 have multiple abutment states at multiple different positions along the axial direction.

[0089] Specifically, the relatively fixed position refers to the position where the movable member 411 is fixedly connected to the limiting member 421. The limiting member 421 and the handle 30 having a plurality of relatively fixed positions arranged in sequence along the axial direction means that the limiting member 421 and the handle 30 have two states: relatively movable and relatively fixed. When the limiting member 421 and the handle 30 are in the relatively movable state, the limiting member 421 can move relative to the handle 30 along the axial direction of the puncture needle 10. When the limiting member 421 and the handle 30 are in the relatively fixed state, the limiting member 421 and the handle 30 are fixedly connected.

[0090] Among them, the relative fixed positions of the limiter 421 and the handle 30 are arranged in sequence along the axial direction of the puncture needle 10, multiple relatively fixed positions can be arranged adjacent to each other in sequence along the axial direction of the puncture needle 10, and multiple relatively fixed positions can be arranged at intervals in sequence along the axial direction of the puncture needle 10.

[0091] When multiple relatively fixed positions are arranged adjacent to each other in the axial direction of the puncture needle 10, the position of the limiter 421 along the axial direction of the puncture needle 10 can be adjusted steplessly, so that the quantitative moving distance of the moving member 411 along the axial direction can be adjusted steplessly.

[0092] In some embodiments, as shown in Figures 24 and 25, the handle 30 is provided with a through slot 301a extending through both sides thereof. The length of the through slot 301a extends along the axial direction of the puncture needle 10. The handle 30 is also provided with a plurality of latching slots 301b. One end of the latching slot 301b is connected to the through slot 301a, and the other end of the latching slot 301b extends along the radial direction of the puncture needle 10. The plurality of latching slots 301b are sequentially spaced along the axial direction of the puncture needle 10. The stopper 421 includes a main body 421a and a latching portion 421b connected to the main body 421a. The latching portion 421b is disposed within the through slot 301a and is slidable within the through slot 301a. The latching portion 421b is capable of latching with each of the latching slots 301b, allowing the stopper 421 to be fixed in different latching slots 301b. In this case, the stopper 421 and the handle 30 are in a relatively fixed position. The movable member 411 includes a main body portion 411a connected to the puncture needle 10 and an abutment portion 411b connected to the main body portion 411a. The proximal end face of the main body portion 421a can abut against the distal end face of the abutment portion 411b. As the clamping portions 421b of the limiting member 421 are respectively located in different clamping grooves 301b, the limiting member 421 and the movable member 411 have multiple abutment states at multiple different positions along the axial direction.

[0093] In some embodiments, as shown in FIG26 , the handle 30 is provided with a through slot 301a extending through both its inner and outer sides. The length of the through slot 301a extends along the axial direction of the puncture needle 10. The stopper 421 includes a main body 421a and a clamping portion 421b connected to the main body 421a. The clamping portion 421b is disposed within the through slot 301a and is slidable within the through slot 301a. The clamping portion 421b is configured as a cylindrical structure and has external threads. The end of the clamping portion 421b facing away from the main body 421a is located outside the handle 30, and the main body 421a abuts against the inner wall of the accommodating cavity 34. The stopper assembly 42 also includes a nut 413a threadedly engaged with the clamping portion 421b. Tightening the nut 413a secures the stopper 421 to the handle 30 at any position on the through slot 301a. The movable member 411 includes a main body portion 411a connected to the puncture needle 10 and an abutment portion 411b connected to the main body portion 411a. The proximal end face of the main body portion 421a can abut against the distal end face of the abutment portion 411b. As the nut 413a fixes the limiting member 421 at different positions of the through groove 301a, the limiting member 421 and the movable member 411 are in multiple abutment states at multiple different positions along the axial direction.

[0094] It can be understood that by fixing the limiter 421 to the handle 30 through connectors such as nuts 413a, the fixed connection position between the limiter 421 and the handle 30 in the axial direction can be steplessly adjusted. According to the diameter differences of human blood vessels, as well as the size data of the coated stent, the puncture needle 10, etc., the puncture distance of the puncture needle 10 can be accurately controlled by steplessly adjusting the position of the limiter 421 in the axial direction. On the basis of successful rupture of the membrane, the probability of the needle tip causing injury to the inner membrane of the coated stent and the blood vessel wall due to the excessive puncture length of the puncture needle 10 is reduced, thereby improving the success rate and safety of intravascular repair surgery.

[0095] Example 3.2

[0096] In this embodiment, please refer to Figures 1 to 22, the limiting member 421 can move in the radial direction relative to the handle 30, and one of the limiting member 421 and the movable member 411 is provided with multiple first limiting portions 401, and the other of the two is provided with a second limiting portion 402 that cooperates with the first limiting portion 401 to stop along the axial direction of the puncture needle 10. The multiple first limiting portions 401 are respectively located at different positions in the axial direction of the puncture needle 10. As the limiting member 421 moves to different positions relative to the handle 30, the second limiting portion 402 can respectively cooperate with different first limiting portions 401 to stop, so that the limiting member 421 and the movable member 411 have multiple abutment states at multiple different positions along the axial direction.

[0097] It is understandable that the limiting member 421 and the moving member 411 can be configured in a variety of different structural forms.

[0098] The technical solutions of the position-limiting assembly 42 and the moving assembly 41 of the present invention will be further described in detail below with reference to specific embodiments.

[0099] Example 3.2.1

[0100] In this embodiment, please refer to Figures 1 to 4. The puncture system 100 includes a catheter 20, a handle 30, a puncture needle 10 and an adjustment mechanism 40. The proximal end of the catheter 20 extends into the handle 30 and is fixedly connected to the handle 30. A puncture channel 21 is provided in the catheter 20, which passes through the distal and proximal ends of the catheter 20. The puncture needle 10 is placed in the puncture channel 21 and can move axially relative to the catheter 20. During the movement, the distal end of the puncture needle 10 can extend out of the distal end of the catheter 20. A traction channel 22 is provided in the catheter 20, which passes through the distal and proximal ends of the catheter 20 and can be used for the traction wire to pass through.

[0101] As shown in Figure 4, the handle 30 mainly plays the role of supporting the overall structure. The handle 30 includes a first shell 31 and a second shell 32 arranged in opposition. For example, the first shell 31 and the second shell 32 shown in Figure 4 are respectively a left shell and a right shell. The left shell and the right shell are arranged in opposition and define a accommodating chamber 34 between the left shell and the right shell. Two parallel first partitions 3101 and second partitions 3102 are provided in the left shell and the right shell. The first partition 3101 and the second partition 3102 are respectively parallel to the axial direction of the puncture needle 10. When the left shell and the right shell are aligned, the two partitions divide the accommodating chamber 34 into a lower space 341, a middle space 342 and an upper space 343 in a direction perpendicular to the partition.

[0102] The moving assembly 41 includes a moving member 411 and a push slider 413b fixed to the moving member 411. The moving member 411 is hollow and tubular, and the inner cavity of the moving member 411 can be used for the guide wire to pass through. The push slider 413b is fixed to the outer peripheral surface of the moving key. The first partition 3101 and the handle 30 located on the side of the first partition 3101 away from the second partition 3102 are respectively provided with a first chute 3103 extending in the axial direction. The push slider 413b is slidably inserted into the first chute 3103. The moving member 411 is movably arranged in the middle space 342 between the two partitions. The sliding cooperation between the push slider 413b and the chute limits the movement of the moving member 411 in the axial direction.

[0103] The limiting assembly 42 includes a limiting member 421, an adjustment key 43b and a return spring 44b. The limiting member 421 includes a shift bar 421c and a first adjustment portion 421d connected to the shift bar 421c. The shift bar 421c on the same side as the first adjustment portion 421d is further provided with a support column 4211c, which extends along the radial direction of the puncture needle 10. The inner wall of the accommodating cavity 34 is provided with a sleeve that is plugged into the support column 4211c. The support column 4211c is provided with a sleeve that is plugged into the support column 4211c. 11c is inserted into the sleeve in a radially slidable manner, and the spring is sleeved outside the support column 4211c and the sleeve, and the two ends of the spring are respectively against the shift bar 421c and the inner wall of the accommodating cavity 34. Under the elastic force of the spring, the shift bar 421c is against the second partition 3102. When the adjustment key 43b applies an upward thrust to the first adjustment part 421d, the shift bar 421c is pushed to move in the direction away from the second partition 3102 (that is, in the radial direction).

[0104] A plurality of first limiting portions 401 are provided on the outer circumference of the movable member 411. The plurality of first limiting portions 401 are located at different positions in the axial direction of the puncture needle 10 and are arranged sequentially and in a stepped manner along the axial direction of the puncture needle 10. The proximal end surface of the shift bar 421c forms a second limiting portion 402. When the limiting member 421 and the movable member 411 are in abutment along the axial direction, the distal end surface of one of the plurality of first limiting portions 401 abuts the proximal end surface of the shift bar 421c.

[0105] Specifically, the handle 30 corresponding to the first adjustment portion 421d and located on the side of the first partition 3101 away from the second partition 3102 is provided with a second slide groove 3104 extending in the axial direction, the adjustment key 43b includes a key body 43b1 located outside the handle 30 and a second adjustment portion 43b2 slidably inserted into the second slide groove 3104, the adjustment key 43b is located on the proximal side relative to the limiter 421, the first adjustment portion 421d is configured with a first inclined surface 421d1 on a side facing the proximal end, and the second adjustment portion 43b2 is configured with a distal side. The second inclined surface 43b21, as the adjustment key 43b slides toward the distal end in the second slide groove 3104, the second inclined surface 43b21 abuts against the first inclined surface 421d1 and pushes the first adjustment part 421d to drive the shift bar 421c to move in the direction away from the second partition 3102. At this time, the distance between the shift bar 421c and the second partition 3102 increases, so that the shift bar 421c is in abutment with the first limiting part 401 close to the proximal end among the multiple first limiting parts 401, so that the puncture needle 10 has a larger quantitative moving distance.

[0106] On the contrary, if the adjustment key 43b slides toward the proximal end in the second slide groove 3104, under the action of the elastic force of the spring, the elastic force pushes the first adjustment part 421d to drive the shift bar 421c to move toward the second partition 3102. At this time, the distance between the shift bar 421c and the second partition 3102 is reduced, so that the shift bar 421c is in contact with the first limit part 401 close to the distal end among the multiple first limit parts 401, so that the puncture needle 10 has a smaller quantitative moving distance.

[0107] Therefore, the shift bar 421c cooperates with the multiple first limiting portions 401 to control the insertion length of the puncture needle 10. The adjustment key 43b is used to adjust the height of the shift bar 421c, and the return spring 44b is used to control the automatic return of the shift bar 421c after it is raised. The shift adjustment key 43b moves axially toward the distal end (i.e., along the axial direction F11), raising the shift bar 421c along the longitudinal direction (i.e., the F12 direction), so that the blocking distance between the shift bar 421c and the first limiting portion 401 changes, thereby pushing the slider 413b to move, thereby driving the moving member 411 and the puncture needle 10 connected thereto to move. When the shift adjustment key 43b moves axially toward the proximal end, the return spring 44b controls the automatic return of the raised shift bar 421c.

[0108] Example 3.2.2

[0109] The differences between Example 3.2.2 and Example 3.2.1 will be described below. The same or similar aspects between Example 3.2.2 and Example 3.2.1 will not be repeated here.

[0110] In this embodiment, please refer to Figures 5 to 14, the handle 30 includes a first shell 31 and a second shell 32 that are arranged in opposition. For example, the first shell 31 and the second shell 32 shown in Figure 4 are respectively an upper shell and a lower shell. The upper shell and the lower shell are arranged in opposition and define the above-mentioned accommodating cavity 34 between the upper shell and the lower shell.

[0111] The moving assembly 41 includes a moving part 411, which is a hollow cylindrical structure as a whole. The proximal end of the puncture needle 10 is inserted into the inner cavity of the moving part 411 from the distal end of the moving part 411 and is fixedly connected to the moving part 411. The inner cavity of the puncture needle 10 is connected to the inner cavity of the moving part 411.

[0112] As shown in FIG8 , a guide channel 37 is further provided in the handle 30 on the proximal side of the accommodating chamber 34. The proximal portion of the movable member 411 is movably provided in the guide channel 37. The guide channel 37 extends along the axial direction of the puncture needle 10. The proximal end of the guide channel 37 forms an opening at the proximal end face of the handle 30. The proximal end of the movable member 411 can be axially slidably inserted from the distal end of the guide channel 37 into the guide channel 37. The distal end of the guide channel 37 is connected to the puncture needle 10 through the lumen of the movable member 411. After the puncture needle 10 punctures the coating, the guide wire used to guide the branch stent is sequentially delivered into the stent coating through the guide channel 37, the interior of the movable member 41, and the hole in the puncture needle 10. A sliding limiter 3401 is provided in the accommodating chamber 34. The sliding limiter 3401 and the guide channel 37 are used to jointly limit the sliding of the movable member 411 in the axial direction relative to the handle 30.

[0113] As shown in FIG. 9 , a plurality of first limiting portions 401 are provided on the outer peripheral surface of the moving member 411 . The plurality of first limiting portions 401 are sequentially arranged along the axial direction of the puncture needle 10 and are arranged in a stepped manner.

[0114] The limiting assembly 42 includes a limiting member 421 and a knob 43c. One of the limiting member 421 and the knob 43c has a slot, and the other has a snap, allowing the knob 43c to be plugged into and connected to the limiting member 421. A radially extending third slot 3105 is defined on the outer surface of the upper housing. The bottom wall of the third slot 3105 is defined by a through-hole 31051 that communicates with the accommodating cavity 34. The knob 43c is connected to the limiting member 421 via the through-hole 31051.

[0115] A radially extending fourth slide groove 3106 is provided on the inner wall of the upper shell facing the accommodating cavity 34. The limiting member 421 includes a sliding portion 421e slidably provided in the fourth slide groove 3106 and a limiting slider 421f connected to the sliding portion 421e and cooperated with the first limiting portion 401 stop. The limiting member 421 is located on the distal side relative to the first limiting portion 401, and the proximal end face of the limiting slider 421f forms the above-mentioned second limiting portion 402.

[0116] As the adjustment button 43c slides in the radial direction in the third slide groove 3105, the proximal end surface of the limiting slider 421f (i.e., the second limiting portion 402) can respectively abut against different first limiting portions 401, thereby controlling the insertion length of the puncture needle 10.

[0117] In detail, as shown in Figures 10 to 12, there are three contact states between the limiting slider 421f and the first limiting portion 401. Among them, the limiting slider 421f in Figure 10 contacts the distal end surface of the first limiting portion 401 at the farthest end. In this state, the distance the puncture needle 10 extends from the distal end of the catheter 20 is short. The limiting slider 421f in Figure 11 contacts the distal end surface of the first limiting portion 401 at the farthest end. In this state, the distance the puncture needle 10 extends from the distal end of the catheter 20 is long. The limiting slider 421f in Figure 12 moves to a point where it no longer contacts the first limiting portion 401 and is no longer restricted in the axial direction. In this state, the distance the puncture needle 10 extends from the distal end of the catheter 20 is the longest.

[0118] Example 3.2.3

[0119] The differences between Example 3.2.3 and Example 3.2.1 will be described below. The same or similar aspects between Example 3.2.3 and Example 3.2.1 will not be repeated here.

[0120] As shown in Figures 15 to 22, in this embodiment, the limiting member 421 can rotate around the axis of the puncture needle 10 relative to the handle 30, the first limiting portion 401 is provided on the limiting member 421, and multiple first limiting portions 401 are arranged in sequence along the circumferential direction of the puncture needle 10 and are arranged in a stepped manner, and the second limiting portion 402 is provided on the movable member 411; as the limiting member 421 rotates to different positions relative to the handle 30 along the circumferential direction of the puncture needle 10, the second limiting portion 402 can respectively cooperate with different first limiting portions 401 stops.

[0121] Specifically, please refer to Figures 5 to 22, the handle 30 includes a first shell 31 and a second shell 32 that are arranged in opposition. For example, the first shell 31 and the second shell 32 shown in Figure 4 are respectively an upper shell and a lower shell. The upper shell and the lower shell are arranged in opposition and define the above-mentioned accommodating cavity 34 between the upper shell and the lower shell.

[0122] The moving assembly 41 includes a moving part 411, which includes a main body 411a and an abutment part 411b connected to the distal end of the main body 411a. The main body 411a is a hollow cylindrical structure, and the abutment part 411b is provided with a connecting channel connected to the inner cavity of the main body 411a. The proximal end of the puncture needle 10 is inserted into the inner cavity of the main body 411a from the distal end of the connecting channel and is fixedly connected to the moving part 411. The inner cavity of the puncture needle 10 is connected to the inner cavity of the main body 411a.

[0123] A guide channel 37 is also provided within the handle 30 on the proximal side of the accommodating cavity 34. The proximal portion of the main body 411a is movably disposed within the guide channel 37. The guide channel 37 extends along the axial direction of the puncture needle 10. The proximal end of the guide channel 37 forms an opening at the proximal end surface of the handle 30. The proximal end of the main body 411a can be axially slidably inserted from the distal end of the guide channel 37 into the guide channel 37. The distal end of the guide channel 37 is connected to the puncture needle 10 through the lumen of the movable member 411. After the puncture needle 10 punctures the stent coating, the guidewire used to guide the branch stent is sequentially delivered into the stent coating through the guide channel 37, the interior of the movable assembly 41, and the hole in the puncture needle 10. A rotation limiter 3402 is provided within the accommodating cavity 34, and the movable member 411 is located proximally relative to the rotation limiter 3402.

[0124] As shown in Figures 20 and 21, the limiting member 421 is cylindrical as a whole, and the limiting member 421 is provided with a through hole 4212 running through its proximal and distal ends. The puncture needle 10 is coaxially arranged with the limiting member 421, and the limiting member 421 is rotatably provided on the rotation limiting portion 3402, so that the limiting member 421 can rotate around the axis of the puncture needle 10 relative to the handle 30. A plurality of first limiting portions 401 are provided at the proximal end of the limiting member 421. The plurality of first limiting portions 401 are arranged in sequence along the axial direction of the puncture needle 10 and are arranged in a stepped manner, so that the proximal end faces of the plurality of first limiting portions 401 are respectively at different positions in the axial direction of the puncture needle 10. The far end of the abutment portion 411b forms a second limiting portion 402. As the limiting member 421 rotates around its own axis, the second limiting portion 402 can correspond to different first limiting portions 401 respectively, so that the limiting member 421 and the moving member 411 have multiple abutment states at multiple different positions along the axial direction, so that the moving component 41 has multiple quantitative moving distances along the axial direction.

[0125] In this embodiment, as shown in Figure 19, the outer surface of the limiting member 421 is also provided with a toggle roller 4213, and the toggle roller 4213 is sleeved outside the limiting member 421. The outer surface of the toggle roller 4213 is provided with multiple grooves to increase the roughness of the outer surface of the toggle roller 4213. At least part of the outer surface of the toggle roller 4213 is exposed outside the handle 30, and the limiting member 421 is rotated by toggling the toggle roller 4213.

[0126] In some embodiments, as shown in Figures 19 to 22 , one of the handle 30 and the stopper 421 is provided with a plurality of locking grooves 4214, and the other is provided with a locking buckle 39 that engages with the locking grooves 4214. The plurality of locking grooves 4214 are sequentially arranged along the circumference of the puncture needle 10, and along the axial direction of the puncture needle 10, each locking groove 4214 corresponds to a position of the first stopper 401. As the stopper 421 rotates around the axis of the puncture needle 10 to different positions relative to the handle 30, the locking buckle 39 can engage with different locking grooves 4214 and lock the stopper 421 and the handle 30. It can be understood that in this embodiment, by setting the locking groove 4214 and the locking buckle 39, when each first limiting portion 401 corresponds to the second limiting portion 402, the limiting member 421 and the handle 30 can be locked to each other through the insertion of a locking groove 4214 and a locking buckle 39 to prevent the limiting member 421 from rotating relative to the handle 30, thereby ensuring that the moving member has a quantitative moving distance.

[0127] It should be noted that, in some embodiments, the locking buckle 39 is cooperated with different locking grooves 4214 to disassemble and assemble the puncture system 100. For example, according to the requirement of the moving distance of the puncture needle 10, when assembling the puncture system 100, the locking groove 4214 corresponding to the quantitative moving distance is plugged into the locking buckle 39, so that the puncture needle 10 of the puncture system 100 has a certain quantitative moving distance. When the quantitative moving distance of the puncture needle 10 needs to be changed, the handle 30 and the limit member 421 can be disassembled and adjusted in relative position so that different locking grooves 4214 are plugged into the locking buckle 39.

[0128] It should also be noted that, in other embodiments, as shown in Figures 19 to 22, the locking groove 4214 and the locking buckle 39 both extend along the axial direction of the puncture needle 10, and the limit member 421 can also move between the first position and the second position along the axial direction of the puncture needle 10 in the accommodating cavity. When the limit member 421 is in the first position, the locking buckle 39 can be inserted into the locking groove 4214 to lock the limit member 421 and the handle 30. When the limit member 421 is in the second position, the locking buckle 39 is pulled out of the locking groove 4214 to unlock the limit member 421 and the handle 30.

[0129] For example, in some embodiments, multiple locking grooves 4214 can be provided on the inner wall of the accommodating cavity of the handle 30, and the locking buckle 39 can be provided on the limiter 421. Specifically, the locking grooves 4214 are provided on the inner wall of the distal end of the accommodating cavity, and the multiple locking grooves 4214 are sequentially spaced apart in the circumferential direction of the puncture needle 10. Moreover, the locking grooves 4214 are recessed along the axial direction of the puncture needle 10 and toward one side of the distal end. The locking buckle 39 is provided on the distal end surface of the limit member 421, and the locking buckle 39 protrudes along the axial direction of the puncture needle 10 and toward one side of the distal end. When the limit member 421 moves to the first position along the axial direction of the puncture needle 10 in the accommodating cavity, the locking buckle 39 can be inserted into the locking groove 4214 to lock the limit member 421 and the handle 30, or when the limit member 421 moves to the second position along the axial direction of the puncture needle 10 in the accommodating cavity, the locking buckle 39 is pulled out from the locking groove 4214 to unlock the limit member 421 and the handle 30.

[0130] For example, in other embodiments, as shown in Figure 19, a locking buckle 39 is protruded from the inner wall of the lower shell of the handle, and the locking buckle 39 protrudes along the axial direction of the puncture needle 10 and toward the proximal side. The distal end of the limiter 421 is provided with a plurality of locking grooves 4214, and the locking grooves 4214 are arranged in sequence and spaced apart along the circumferential direction of the limiter 421. The limiter 421 can also move back and forth along the axial direction of the puncture needle 10 between the rotation limiter 3402 and the distal inner wall of the accommodating cavity 34, so that the locking buckle 39 can be plugged into and matched with different locking grooves 4214.

[0131] In this embodiment, as shown in Figures 15 and 16, the operation of adjusting the position of the limit member 421 to match different first limit portions 401 with the second limit portions 402 is as follows: as shown in Figure 16, first, the limit member 421 is moved along the axial direction F31' to the second position, so that the locking buckle 39 disengages from the locking groove 4214 to unlock the limit member 421; then, the roller 4213 is toggled laterally along the direction F31" to adjust the angle of the limit member 421 to select a suitable length for the first limit portion 401 to contact the distal end surface of the abutment portion 411b of the moving member 411 (i.e., the second limit portion 402), thereby limiting the forward distance of the moving member 411, thereby controlling the protruding length of the puncture needle 10. After determining the suitable length, the roller is pushed forward (in the opposite direction to F31') to move the limit member 421 to the first position, so that the locking groove 4214 and the locking buckle 39 engage with each other, thereby limiting the rotation of the limit member 421 relative to the handle.

[0132] Example 4

[0133] The differences between Example 4 and Example 3 will be described below, and the same or similar aspects between Example 4 and Example 3 will not be repeated here.

[0134] In this embodiment, the moving assembly 41 includes a moving member 411 that can move relative to the handle 30 in the axial direction of the puncture needle 10. The moving member 411 is provided with a first engaging structure extending along the axial direction of the puncture needle 10.

[0135] The adjustment mechanism 40 also includes a driving member, which is rotatably provided on the handle 30. The driving member is provided with a second engaging structure engaged with the first engaging structure. By rotating the driving member, the movable member 411 can have at least a quantitative moving distance relative to the handle 30 in the axial direction of the puncture needle 10.

[0136] Specifically, the driving member and the moving member 411 are respectively provided with a first meshing structure and a second meshing structure that mesh with each other. By rotating the driving member to drive the moving member 411 to move axially, the moving distance of the moving member 411 in the axial direction can be precisely controlled.

[0137] It can be understood that the first meshing structure and the second meshing structure can be mutually meshing gear rack structures, or mutually meshing flywheel and chain structures, or threaded screw nut mechanisms, by precisely controlling the rotation angle of the driving member, so that the quantitative movement distance of the moving member 411 along the axial direction can be steplessly adjusted.

[0138] Example 5

[0139] The following describes the differences between Example 5 and Examples 1 to 4. The similarities or similarities between Example 5 and Examples 1 to 4 are not repeated here. It should be understood that, in the absence of structural conflicts, the exemplary solution of this embodiment can be combined with any of the aforementioned embodiments to form a solution with an adaptable effect, and the resulting new solution is within the scope of protection of this application.

[0140] In this embodiment, as shown in Figures 5 to 22, the handle 30 includes a first shell 31 and a second shell 32 that are engaged with each other. The first shell 31 and the second shell 32 define a receiving chamber 34. The inner wall of the first shell 31 is provided with a locking portion 311 that protrudes into the receiving chamber 34. The puncture system 100 also includes a locking assembly 50 connected to the movable assembly 41. The locking assembly 50 includes a locking member 51 disposed in the receiving chamber 34. The locking member 51 can reciprocate relative to the movable assembly 41 along the radial direction of the puncture needle 10 between a locked position and an unlocked position. In the locked position, the locking member 51 is connected to the locking portion 311 to lock the movable assembly 41. In the unlocked position, the locking member 51 is separated from the locking portion 311 to unlock the movable assembly 41.

[0141] By providing the locking assembly 50 , the moving assembly 41 will not slide when placed in the initial position, thereby preventing vibration during transportation from causing the needle to pierce and damage other accessories or packaging.

[0142] The technical solution of the locking assembly 50 will be further described in detail below in conjunction with specific embodiments.

[0143] Example 5.1

[0144] It should be noted that, as shown in FIG7 , this embodiment is illustratively based on Example 3.2.2, and a locking assembly 50 is additionally provided, and its specific structure is as follows:

[0145] In this embodiment, as shown in FIG8 , the movable assembly 41 further includes a support member 412 connected to the movable member 411. The support member 412 is provided with a first guide portion 4121 extending radially along the puncture needle 10. The locking member 51 is provided with a second guide portion 511 extending radially along the puncture needle 10. One of the first guide portion 4121 and the second guide portion 511 is slidably disposed outside the other. The locking assembly 50 further includes an elastic member 52 and an unlocking key 53. The elastic member 52 is specifically a return spring and is disposed outside or inside the first and second guide portions 4121 and 511. The two ends of the elastic member 52 respectively abut against the support member 412 and the locking member 51. The unlocking key 53 is connected to the end of the locking member 51 facing away from the support member 412. The first housing 31 is provided with a slot 35 extending axially along the puncture needle 10. At least a portion of the unlocking key 53 extends out of the accommodating cavity 34 through the slot.

[0146] Specifically, the support member 412 includes a tubular portion 412a and a wing portion 412b connected to the outer peripheral surface of the tubular portion 412a, the first guide portion 4121 is provided on the wing portion 412b, the outer peripheral surface of the movable member 411 close to the distal end is provided with a radially extending push block 413c, the tubular portion 412a is sleeved outside the movable member 411, and the tubular portion 412a is provided with a first limiting groove 412a1, the first limiting groove 412a1 forms an opening on one side of the proximal end of the tubular portion 412a, and the push block 413c can pass through the opening and be arranged in the first limiting groove 412a1.

[0147] The locking member 51 is provided with a second limiting groove 512 corresponding to the first limiting groove 412a1. The pushing block 413c passes through the first limiting groove 412a1 and is inserted into the second limiting groove 512, so that the pushing block 413c limits the moving member 411, the supporting member 412 and the locking member 51 along the axial direction of the puncture needle 10, and the locking member 51 and the supporting member 412 can move relative to each other in the radial direction of the puncture needle 10.

[0148] One of the unlocking key 53 and the locking member 51 is provided with a buckle, and the other is provided with a slot. The unlocking key 53 and the locking member 51 are connected by the buckle and the slot.

[0149] Specifically, as shown in Figures 5, 6, and 8, the first housing 31 is provided with a slide groove 35 extending along the axial direction of the puncture needle 10. The unlocking key 53 includes an unlocking key body 531 and an inserting portion 532. The locking member 51 is provided with an inserting groove 511a on the side away from the support member 412. The inserting portion 532 is slidably inserted into the slide groove, and the end of the inserting portion 532 away from the unlocking key body 531 extends into the accommodating cavity 34 and is inserted into the inserting groove 511a, so that the unlocking key 53 is fixedly connected to the locking member 51. Pushing the unlocking key 53 to move axially can drive the moving member 411 to move axially through the locking member 51, the support member 412, and the pushing block 413c, thereby driving the puncture needle 10 to move axially to complete the puncture action.

[0150] In this embodiment, the locking and unlocking process of the unlocking assembly and the locking portion 311 is as follows:

[0151] Referring to Figures 13 and 14, when the unlocking button 53 is in the "zero position," the return spring acts to cause the upper surface of the locking member 51 to contact the lower surface of the upper housing. The proximal end surface of the locking portion 311 and the distal end surface of the locking member 51 contact each other, preventing the unlocking assembly from sliding in the initial position. This prevents vibration during transportation, which could cause the needle to pierce and damage other accessories or packaging. The proximal end surface of the locking member 51 and the distal end surface of the locking portion 311 are mating inclined surfaces. Referring to Figure 14, by pressing the unlocking button 53 downward, the return spring is compressed, and the upper surface of the locking member 51 is lower than the lower surface of the locking portion 311. Pressing the unlocking button 53 forward drives the locking member 51 to move. Since the end face of the proximal side of the locking member 51 and the end face of the distal side of the locking portion 311 are matching inclined surfaces when they are in the "zero position", when the unlocking key 53 returns to the "zero position", the two inclined surfaces match each other to prevent the locking portion 311 from hindering the locking member 51 from moving toward the proximal side, so that the unlocking key 53 can return to the "zero position".

[0152] 5 , 6 and 8 , the adjustment knob 43 c moves in the radial direction F21 , selects a suitable gear, and moves the unlocking key 53 axially in the longitudinal direction F22 to drive the push rod and the puncture needle connected thereto to move.

[0153] Example 5.2

[0154] It should be noted that, referring to FIG. 15 to FIG. 22 , for example, this embodiment is based on Example 3.2.3 and further includes a locking assembly 50 , the specific structure of which is as follows:

[0155] In this embodiment, referring to Figures 18, 19 and 21, the movable member 411 includes a main body 411a and an abutting portion 411b connected to the distal end of the main body. The abutting portion is provided with a first guide portion 4121 extending radially along the puncture needle 10. The locking member 51 is provided with a second guide portion 511 extending radially along the puncture needle 10. One of the first guide portion 4121 and the second guide portion 511 is slidably mounted outside the other. The locking assembly 50 also includes an elastic member 52 and an unlocking key 53. The elastic member 52 is mounted outside the first guide portion 4121 and the second guide portion 511 or inside the first guide portion 4121 and the second guide portion 511. The two ends of the elastic member 52 respectively abut against the abutting portion and the locking member 51. The unlocking key 53 is connected to an end of the locking member 51 away from the abutting portion. The first housing 31 is provided with a slide groove 35 extending axially along the puncture needle 10, and at least a portion of the unlocking key 53 extends out of the accommodating cavity 34 through the slide groove.

[0156] Specifically, as shown in FIG19 , the unlocking key 53 includes an unlocking key body 531 and an inserting portion 532. A plugging groove 511a is provided on the side of the locking member 51 facing away from the support member 412. The inserting portion 532 is slidably inserted into the slide groove, and the end of the inserting portion 532 facing away from the unlocking key body 531 extends into the accommodating cavity 34 and is inserted into the inserting groove 511a, thereby fixing the unlocking key 53 to the locking member 51. Pushing the unlocking key 53 to move axially can drive the moving member 411 to move axially via the locking member 51, the support member 412, and the pushing block, thereby driving the puncture needle 10 to move axially to complete the puncture operation.

[0157] In this embodiment, the locking and unlocking process of the unlocking assembly and the locking portion 311 is as follows:

[0158] As shown in Figures 15 and 21, when the unlocking button 53 is placed in the "zero position", the return spring acts to cause the upper surface of the locking member 51 to contact the lower surface of the upper shell, wherein the end surface of the proximal side of the locking portion 311 and the end surface of the distal side of the locking member 51 contact each other, so that the unlocking assembly does not slide when in the initial position, thereby preventing vibration during transportation, etc., which may cause the needle to pierce and damage other accessories or packaging. Among them, the end surface of the distal side of the locking portion 311 is configured as an inclined surface. Referring to Figures 16 and 22, when the unlocking button 53 is pressed downward, the return spring is compressed, and the upper surface of the locking member 51 is lower than the lower surface of the locking portion 311. Pressing the unlocking button 53 to move forward drives the locking member 51 to move. The end face of the distal side of the locking portion 311 is a slope. Therefore, when the unlocking key 53 returns to the "zero position", the locking member 51 moves toward the side close to the abutment portion under the guidance of the slope and compresses the return spring, thereby preventing the locking portion 311 from hindering the locking member 51 from moving toward the proximal side, so as to facilitate the unlocking key 53 to return to the "zero position".

[0159] Example 6

[0160] The following describes the differences between Example 6 and Examples 1 to 5. The similarities or similarities between Example 6 and Examples 1 to 5 are not repeated here. It should be understood that, in the absence of structural conflicts, the exemplary solution of this embodiment can be combined with any of the aforementioned embodiments to form a solution with an adaptable effect, and the resulting new solution is within the scope of protection of this application.

[0161] As shown in FIG27 , in this embodiment, a plurality of protrusions 222 are provided on the inner wall of at least the distal traction channel 22. The plurality of protrusions 222 are arranged in sequence along the circumference of the traction channel, and a guide wire can be inserted between two adjacent protrusions 222. The protrusions 222 are elastic. When the distal exposed portion and / or the proximal exposed portion of the guide wire 200 are pulled to adjust the orientation of the distal end of the catheter 20 and the puncture posture of the needle tip of the puncture needle 10, the guide wire 200 moves axially within the traction channel 22. By providing a plurality of protrusions 222, when the guide wire 200 is pulled, the guide wire 200 is affected by the tension and deflected to one side of the traction channel 22 along the radial direction of the traction channel 22. The elastic protrusions 222 are deformed, and the guide wire 200 is clamped in the gap between two adjacent protrusions 222. The protrusions 222 Under the extrusion of the guide wire, elastic deformation is generated and the elastic force is reacted to the guide wire 200, so that a large friction force is generated between the guide wire 200 and the protrusion 222 during the axial movement in the traction channel. Therefore, when the distal exposed part or the proximal exposed part of the guide wire 200 is pulled, the interaction force between the protrusion 222 and the guide wire is utilized to make the traction force of the guide wire act better on the catheter, and at the same time, a certain limit is placed on the circumference of the guide wire, thereby efficiently adjusting the direction of the distal end of the catheter 20, so that the needle head of the puncture needle 10 placed in the puncture channel 21 reaches a preset puncture posture.

[0162] In some embodiments, the protrusion 222 is conical and has a certain elastic deformation capability. When the guidewire applies pressure to the protrusion 222, the protrusion 222 elastically deforms. The multiple protrusions 222 are arranged in sequence along the circumference and axial direction of the traction channel, so that the protrusions 222 are evenly distributed throughout a portion or the entire guidewire channel.

[0163] It should be noted that this embodiment can be applied to any of the above embodiments, and the technical solution of this embodiment combined with any of the embodiments 1 to 5 is also covered by the protection scope of the present invention.

[0164] The foregoing description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be readily conceived by a person skilled in the art within the technical scope disclosed in the present invention are intended to be encompassed within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A puncture system, characterized in that, The puncture system includes a catheter, a handle, and a puncture needle. The proximal end of the catheter extends into the handle and is fixedly connected to the handle. A puncture channel and at least one traction channel that penetrate the distal end and the proximal end of the catheter are provided inside the catheter. At least one guide wire channel is provided inside the handle. One of the guide wire channels communicates with one of the traction channels. At least a part of the puncture needle is disposed inside the puncture channel and can axially move relative to the catheter. The distal end of the puncture needle can extend out of the distal end face of the catheter. Wherein, the connected guide wire channel and the traction channel are available for a guide wire to pass through, and both ends of the guide wire can respectively extend out and be exposed at the distal end of the catheter and the handle. The parts exposed at the distal end of the catheter and the handle are respectively a distal exposed part and a proximal exposed part. Pulling the distal exposed part and / or the proximal exposed part can adjust the orientation of the distal end of the catheter, so that the tip of the puncture needle placed in the puncture channel reaches a preset puncture posture.

2. The puncture system according to claim 1, wherein, A plurality of the traction channels are provided inside the catheter, and the plurality of traction channels are arranged at intervals along the circumferential direction of the catheter. A plurality of the guide wire channels are provided inside the handle, and the plurality of traction channels and the plurality of guide wire channels are arranged in one-to-one correspondence. The opposite plurality of traction channels and the guide wire channels are available for a plurality of guide wires to pass through. The exposed parts of the plurality of guide wires can be pulled to adjust the orientation of the distal end of the catheter at multiple angles, so that the tip of the puncture needle reaches a preset puncture posture.

3. The puncture system according to claim 1, characterized in that, The catheter includes a distal segment and a proximal segment. The proximal end of the distal segment is connected to the distal end of the proximal segment. The bending performance of the distal segment is higher than that of the proximal segment. And / or, the puncture needle includes a support part and a puncture part connected to the distal end of the support part. The bending performance of the support part is higher than that of the puncture part.

4. The puncture system according to claim 1, wherein A plurality of protrusions are provided on the inner wall of at least the distal traction channel. The plurality of protrusions are arranged in sequence along the circumferential direction of the inner wall of the traction channel. The guide wire can be placed between two adjacent protrusions.

5. The puncture system according to claim 1, wherein At least a part of the guide wire channel has a curved structure.

6. The puncture system according to any one of claims 1 to 5, characterized in that, The puncture system further includes an adjustment mechanism. At least a part of the adjustment mechanism is disposed inside the handle. The adjustment mechanism is connected to the proximal end of the puncture needle. The adjustment mechanism is used to control the distance that the distal end of the puncture needle extends out of the distal end of the catheter.

7. The puncture system according to claim 6, characterized in that, The adjustment mechanism includes a moving component. The proximal end of the puncture needle is connected to the moving component. The moving component has at least one quantitative moving distance along the axial direction of the puncture needle relative to the handle.

8. The puncture system according to claim 7, characterized in that, The adjustment mechanism further includes a limiting component. The limiting component includes a limiting member movably disposed in the handle. The moving component includes a moving member that can move relative to the handle along the axial direction of the puncture needle. The proximal end of the puncture needle is connected to the moving member. As the limiting member moves, there are multiple abutting states between the limiting member and the moving member at multiple different positions along the axial direction of the puncture needle, so that the moving component has multiple quantitative moving distances along the puncture needle.

9. The puncture system according to claim 8, wherein, The limiting member can move relative to the handle in the radial direction of the puncture needle. One of the limiting member and the moving member is provided with a plurality of first limiting portions, and the other of the two is provided with second limiting portions that are in abutting cooperation with the first limiting portions along the axial direction of the puncture needle. The plurality of first limiting portions are located at different positions along the axial direction of the puncture needle. As the limiting member moves to different positions relative to the handle in the radial direction, the second limiting portions can be respectively in abutting cooperation with different first limiting portions, so that there are a plurality of abutting states at a plurality of different positions along the axial direction of the puncture needle between the limiting member and the moving member.

10. The puncture system according to claim 9, wherein, The limiting member can rotate relative to the handle around the axis of the puncture needle. A plurality of first limiting portions are provided at the proximal end of the limiting member. The plurality of first limiting portions are arranged in sequence along the circumferential direction of the limiting member and are arranged in a stepped manner. The moving member is provided with second limiting portions. As the limiting member rotates to different positions relative to the handle along the circumferential direction of the puncture needle, the second limiting portions can be respectively in abutting cooperation with different first limiting portions, so that there are a plurality of abutting states at a plurality of different positions along the axial direction of the puncture needle between the limiting member and the moving member.

11. The puncture system according to claim 7, characterized in that, The handle has a receiving cavity, and a locking portion is convexly provided on the inner wall of the receiving cavity; The puncture system further includes a locking assembly. The locking assembly includes a locking member, an elastic member and an unlocking key. The locking member and the elastic member are provided in the receiving cavity. The elastic member is arranged along the radial direction of the puncture needle, and both ends of the elastic member are respectively connected to the locking member and the moving assembly. One end of the unlocking key is connected to the locking member, and the other end of the unlocking key extends out of the receiving cavity; The unlocking key and the elastic member can respectively drive the unlocking key to switch between an unlocking position and a locking position, In the locking position, the locking member is in contact with the locking portion to lock the moving assembly. In the unlocking position, the locking member is separated from the locking portion to unlock the moving assembly.

12. The puncture system according to claim 11, wherein, The moving assembly includes a support member. The support member is provided with a first guiding portion extending along the radial direction of the puncture needle. The locking member is provided with a second guiding portion extending along the radial direction of the puncture needle. One of the first guiding portion and the second guiding portion is slidably sleeved outside the other. The elastic member is sleeved outside the first guiding portion and the second guiding portion, or the elastic member is sleeved inside the first guiding portion and the second guiding portion. Both ends of the elastic member are respectively in contact with the support member and the locking member.

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