Puncture system

Abstract

This invention discloses a puncture system, including a catheter, a handle, and a puncture needle. The proximal end of the catheter extends into and is fixed to the handle. The catheter has a puncture channel penetrating both the distal and proximal ends and at least one traction channel. The handle has at least one guidewire channel, which communicates with the traction channel. At least a portion of the puncture needle is located within the puncture channel and is axially movable relative to the catheter. The distal end of the puncture needle can extend beyond the distal end face of the catheter. The connected guidewire channel and traction channel allow the guidewire to pass through, and both ends of the guidewire can extend and protrude from the distal end of the catheter and the handle, respectively. The portions protruding from the distal end of the catheter and the handle are respectively the distal exposed portion and the proximal exposed portion. Pulling the distal exposed portion and / or the proximal exposed portion can adjust the orientation of the distal end of the catheter, so that the needle tip of the puncture needle placed in the puncture channel reaches a preset puncture posture. The puncture system of this invention can quickly adjust the puncture angle of the puncture needle to reduce the risk of membrane rupture.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent application No. 202311232336.6, filed on September 21, 2023, entitled "A Puncture System", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to the field of medical devices, and more particularly to a puncture system. Background Technology

[0004] Endovascular repair of aortic diseases using covered stents can restore patency to the diseased areas of the aorta, improving blood flow and limb ischemia caused by vascular stenosis or occlusion. However, in specific lesion sites such as the aortic arch, celiac trunk, bilateral renal arteries, or superior mesenteric artery, covered stents can affect the blood supply to arterial branches. In these cases, in-situ fenestration of the covered stent is necessary during surgery to create the desired opening, and then a branch stent is delivered to this opening and connected to the covered stent. This method overcomes the dependence of treatment plans on the anatomy of the body's branch vessels, shortens surgical time, and reduces the risk of infection.

[0005] Currently, the mechanical fenestration method is used to perform in-situ fenestration of covered stents after implantation. Typically, after the covered stent is implanted, a puncture instrument is inserted through the brachial / carotid artery into the junction of the branch vessel to be fenestrated and the main vessel. A puncture needle is used to physically puncture the stent cover, and a guidewire is inserted from the puncture needle lumen into the stent cover. After the puncture instrument is withdrawn while the guidewire is retained, a balloon is used to enter along the guidewire and dilate the stent opening to obtain the desired hole. However, ensuring and positioning the direction and angle of the puncture needle has always been a problem, especially for some tortuous blood vessels, such as those with small angles between branch vessels and aortic arch vessels. In some cases, the angle between branch vessels and aortic arch vessels is less than 30°. Under the influence of branch vessels, the puncture needle of existing puncture instruments also has a small angle between the puncture needle and the surface of the covered stent. This causes the needle tip to move at a small puncture angle relative to the surface of the covered stent during the puncture action, which can easily lead to the fenestration deviating from the target position, or even cause the needle tip to slip on the surface of the covered stent and deviate to one side of the covered stent, resulting in failure of membrane rupture and the possibility of further puncturing the vessel wall. Therefore, it is particularly important to quickly adjust and control the puncture angle of the puncture needle. Summary of the Invention

[0006] This invention provides a puncture system designed to quickly adjust the puncture angle of the puncture needle to reduce the risk of membrane rupture.

[0007] The technical problem solved by this invention is achieved through the following technical solution:

[0008] The present invention provides a puncture system, the puncture system comprising a catheter, a handle, and a puncture needle, wherein 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 penetrating the distal end and the proximal end of the catheter and at least one traction channel, 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, and the distal end of the puncture needle is able to extend beyond the distal end face of the catheter;

[0009] The guidewire channel and the traction channel are connected so that the distal end of the guidewire can pass through sequentially, and the two ends of the guidewire can extend out and be exposed at the distal end of the catheter and the handle, respectively. The portions exposed at the distal end of the catheter and the handle are the distal exposed portion and the proximal exposed portion, respectively.

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

[0011] In some embodiments of the present invention, the catheter is provided with a plurality of traction channels, which are spaced apart circumferentially along the catheter. The handle is provided with a plurality of guidewire channels, which are arranged opposite to each other. The opposing plurality of traction channels and guidewire channels allow a plurality of guidewires to pass through sequentially, and the exposed portions of the multiple guidewires can be pulled to adjust the orientation 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 includes a distal segment and a proximal segment, the proximal end of the distal segment being connected to the distal end of the proximal segment, and the bending performance of the distal segment being higher than that of the proximal segment.

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

[0014] In some embodiments of the present invention, at least the inner wall of the traction channel at the distal end is provided with a plurality of protrusions, the plurality of protrusions being arranged sequentially along the circumferential direction 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 at least partially disposed within the handle, the adjustment mechanism being connected to the proximal end of the puncture needle, the adjustment mechanism being 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 invention, the adjustment mechanism includes a moving component connected to the proximal end of the puncture needle, the moving component having at least one quantitative movement distance relative to the handle along the axial direction of the puncture needle.

[0018] In some embodiments of the present invention, the adjusting mechanism further includes a limiting component, the limiting component including a limiting member movably disposed on the handle, the moving component including a moving member movable relative to the handle along the axial direction of the puncture needle, the proximal end of the puncture needle being connected to the moving member, and the limiting member and the moving member having multiple abutment states at multiple different positions along the axial direction of the puncture needle as the limiting member moves, such that the moving component has multiple quantitative movement distances along the puncture needle.

[0019] In some embodiments of the present invention, the limiting member can move relative to the handle along 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 a second limiting portion along the axial direction of the puncture needle that cooperates with the first limiting portion stop. 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 along the radial direction, the second limiting portion can cooperate with different first limiting portion stops, so that the limiting member and the moving 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 is rotatable relative to the handle about the axis of the puncture needle. The proximal end of the limiting member is provided with a plurality of first limiting portions, which are arranged sequentially and in a stepped manner along the circumferential direction of the limiting member. The moving 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 first limiting portions to stop, so that the limiting member and the moving 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 receiving cavity, and the inner wall of the receiving cavity is provided with a locking portion; the puncture system further includes a locking assembly, which includes a locking member, an elastic member, and an unlocking key. The locking member and the elastic member are disposed in the receiving cavity. The elastic member is arranged radially along the puncture needle, and both ends of the elastic member are respectively connected to the locking member and the moving component. 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 unlocked position and a locked position. In the locked position, the locking member engages with the locking portion to lock the moving component. In the unlocked position, the locking member separates from the locking portion to unlock the moving component.

[0022] In some embodiments of the present invention, the moving component includes a support member having a first guide portion extending radially along the puncture needle, and a locking member having a second guide portion extending radially along the puncture needle. One of the first guide portion and the second guide portion is slidably fitted over the other. An elastic member is fitted over the outside of the first guide portion and the second guide portion, or the elastic member is fitted over the inside of the first guide portion and the second guide portion. The two ends of the elastic member abut against the support member and the locking member, respectively.

[0023] The puncture system of the present invention has a puncture channel and a traction channel set in the catheter. By pulling the two ends of the guidewire passing through the traction channel, the position and orientation of the distal end of the catheter of the puncture system can be adjusted, thereby quickly adjusting the puncture needle tip placed in the catheter to achieve the preset puncture posture, reducing the risk of membrane rupture and surgical difficulty, and improving the positional accuracy and success rate of fenestration of the covered stent. Attached Figure Description

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

[0025] Figure 1 This is a schematic diagram of a puncture system exemplified by the present invention;

[0026] Figure 2 This is a schematic cross-sectional view of the catheter in an exemplary puncture system of the present invention;

[0027] Figure 3 This is a partial cross-sectional view of the catheter in an exemplary puncture system of the present invention;

[0028] Figure 4 for Figure 1 Schematic diagram of a localized explosion of a central puncture system;

[0029] Figures 5 to 14Another structural schematic diagram of the exemplary puncture system of the present invention;

[0030] Figures 15-22 A schematic diagram of another exemplary puncture system of the present invention;

[0031] Figure 23 This is a schematic diagram of a puncture needle exemplified by the present invention;

[0032] Figures 24-25 A schematic diagram of another exemplary puncture system of the present invention;

[0033] Figure 26 This is a schematic diagram of another exemplary puncture system of the present invention;

[0034] Figure 27 This is another schematic diagram of the structure of the catheter of the present invention.

[0035] The markings in the attached diagram are as follows:

[0036] 100. Puncture system;

[0037] 10. Puncture needle; 11. Puncture site; 12. Support section;

[0038] 20. Catheter; 21. Puncture channel; 22. Traction channel; 221. First opening; 222. Protrusion;

[0039] 30. Handle; 31. First housing; 311. Locking part; 32. Second housing; 33. Guidewire channel; 331. Third opening; 332. Curved section; 333. Straight section; 34. Receiving cavity; 35. Slide groove; 36. Catheter lumen; 37. Guiding channel; 38. Puncture needle lumen;

[0040] 40. Adjustment mechanism; 401. First limiting part; 402. Second limiting part;

[0041] 41. Moving component; 411. Moving part; 412. Supporting part; 4121. First guide part;

[0042] 42. Limiting component; 421. Limiting element;

[0043] 50. Locking assembly; 51. Locking element; 511. Second guide part; 52. Elastic element; 53. Unlocking button;

[0044] 301a, through groove; 301b, slot; 421a, main body; 421b, snap-fit ​​part; 411a, body part; 411b, abutment part; 413a, nut;

[0045] 3101, First partition; 3102, Second partition; 3103, First slide groove; 3104, Second slide groove; 341, Lower space; 342, Middle space; 343, Upper space; 413b, Push slider; 421c, Gear bar; 421d, First adjustment part; 421d1, First inclined surface; 4211c, Support column; 43b, Adjustment key; 43b1, Key body; 43b2, Second adjustment part; 43b21, Second inclined surface; 44b, Return spring;

[0046] 3401, Sliding limit part; 43c, Adjusting knob; 3105, Third slide groove; 31051, Through hole; 3106, Fourth slide groove; 421e, Sliding part; 421f, Limiting slider;

[0047] 3402. Rotate the limiting part; 4212. Through hole; 4213. Move the roller; 4214. Locking groove; 39. Locking buckle;

[0048] 413c, push block; 412a, tubular part; 412a1, first limiting groove; 412b, wing part; 512, second limiting groove;

[0049] 531. Unlock key body; 532. Connecting part; 511a. Connecting slot;

[0050] 200. Guide wire. Detailed Implementation

[0051] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0052] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0053] It should be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also mean including the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0054] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as a second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0055] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0056] It should be noted that the terms "distal" and "proximal" are used as directional terms, which are commonly used in the field of interventional medical devices. "Distal" refers to the end furthest from the operator during the procedure, while "proximal" refers to the end closest to the operator. Axial direction refers to the direction parallel to the line connecting the center of the distal and proximal ends of the medical device; radial direction refers to the direction perpendicular to the aforementioned axial direction.

[0057] like Figure 1 and Figure 2 As shown, 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 and is fixedly connected to the handle 30. The catheter 20 has a puncture channel 21 penetrating the distal and proximal ends of the catheter and at least one traction channel 22. The handle 30 has at least one guidewire channel 33, the distal end of which is opposite to and communicates with the proximal end of the traction channel 22. At least a portion of the puncture needle 10 is disposed within the puncture channel 21 and is axially movable relative to the catheter 20. During movement, the distal end of the guidewire 20 can extend beyond the distal end face of the catheter 20. The communicating guidewire channel 33 and traction channel 22 allow the guidewire 200 to pass through sequentially. Both ends of the guidewire 200 extend and protrude from the distal end of the catheter 20 and the outside of the handle 30, respectively. The portions protruding from 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 this invention refers to the puncture needle tip being perpendicular to the surface of the covered stent, or the angle between the puncture needle tip and the surface of the covered stent being close to a preset angle range of perpendicularity. For example, the preset angle range is an angle greater than 50° between the puncture needle tip and the covered stent.

[0058] 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 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 and proximal ends of the guidewire 200 to extend out of 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, resulting in a better relative angle between the distal end of the puncture needle 10 and the outer surface of the covered stent. For example, if the angle between the puncture needle 10 and the puncture object (e.g., the covered stent) is small during puncture, the puncture becomes more difficult. This allows for the pulling of the proximal exposed portion of the catheter 20 and / or the distal exposed portion of the catheter 20 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 aligned with the preset puncture position. This makes the positional accuracy of the fenestration position more accurate, reduces the difficulty of puncture, reduces the probability of the needle tip of the puncture needle 10 slipping on the surface of the covered stent, and prevents the needle tip from deviating to one side of the covered stent, thereby further reducing the possibility of the needle tip of the puncture needle 10 puncturing the blood vessel wall.

[0059] In detail, taking the endovascular repair of the left subclavian artery as an example, firstly, a guidewire 200 is introduced through the femoral / brachial artery and then pulled out from the other side using instruments such as a catcher. This establishes a path from the brachial artery through branches of the aortic arch to the aortic arch, and then along the aorta to the femoral artery. Generally, the proximal end of the guidewire 200 is exposed outside the brachial artery inlet, and the distal end is exposed outside the femoral artery outlet, allowing for manipulation of both the proximal and distal ends. A "loach" guidewire 200 is typically used to ensure it conforms properly to various vascular morphologies. Secondly, a covered stent is implanted at the location corresponding to the aortic arch of the left subclavian artery. At this point, the covered stent covers the left subclavian artery. Next, the proximal tip of the guidewire 200 at the brachial artery is inserted into the traction channel 22 of the catheter 20 through the first opening 221 and exits through the second opening. The catheter 20 is then guided along the guidewire 200 until the port of the catheter 20 is observed to be close to the stent cover below the left subclavian artery. The relative angle between the distal end of the catheter 20 and the stent cover is adjusted by pulling the proximal or distal exposed portion of the guidewire 200 to tighten or loosen it until it is confirmed from multiple directions that the distal end of the catheter 20 is perpendicular to the stent cover. Finally, the puncture needle 10 is pushed distally so that the needle tip of the puncture needle 10 pierces the distal end face of the catheter 20. After piercing the cover, 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 advanced into the stent cover, thus completing the in-situ fenestration procedure.

[0060] Compared to traditional in-situ fenestration instruments, the puncture system 100 proposed in this invention can adjust the relative angle of some blood vessels in the body by pulling the guide wire 200. At the same time, since the catheter 20 is equipped with a traction channel 22, there is no need to add an external sheath to wrap around the outer surface to increase the traction channel 22. Compared with traditional in-situ fenestration instruments, when using matching guide wire instruments of the same specifications, the puncture system proposed in this invention has a smaller overall outer diameter, which makes it easier to enter thinner blood vessels and can reduce the size of the incision in interventional surgery.

[0061] Furthermore, in some embodiments, the catheter 20 is provided with multiple traction channels 22, any two of which are spaced apart circumferentially along the catheter 20. Multiple guidewires 200 can pass through these multiple traction channels 22 respectively, allowing for the pulling of the proximal and / or distal ends of the 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, "multiple" refers to at least two.

[0062] In other embodiments, such as Figure 27As shown, at least the inner wall of the distal traction channel 22 is provided with multiple protrusions 222, which are arranged sequentially along the circumference of the traction channel. A guidewire can be inserted between adjacent protrusions 222. The protrusions 222 are elastic. During the process of pulling the distal exposed portion and / or proximal exposed portion of the guidewire 200 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 guidewire 200 undergoes axial movement within the traction channel 22. By providing multiple protrusions 222, when the guidewire 200 is pulled, it is radially biased to one side of the traction channel 22 under the influence of the tension. The elastic protrusions 222 deform, and the guidewire 200 is clamped in the gap between two adjacent protrusions 222. The guidewire undergoes elastic deformation under compression and reacts with elastic force on the guidewire 200. This causes the guidewire 200 to move axially within the traction channel and generate significant friction between itself and the protrusion 222. Therefore, when the distal or proximal exposed portion of the guidewire 200 is pulled, the interaction force between the protrusion 222 and the guidewire allows the traction force of the guidewire to act more effectively on the catheter. At the same time, the guidewire is circumferentially limited, thereby efficiently adjusting the orientation of the distal end of the catheter 20 and ensuring that the needle tip of the puncture needle 10 placed in the puncture channel 21 reaches the preset puncture posture.

[0063] In some embodiments, the protrusion 222 is conical in shape and has a certain elastic deformation capability. When pressure is applied to the protrusion 222 by the guide wire, the protrusion 222 undergoes elastic deformation. Multiple protrusions 222 are arranged sequentially along the circumference and axial direction of the traction channel, so that the protrusions 222 are evenly distributed in part or all of the guide wire channel.

[0064] For example, catheter 20 includes a distal segment and a proximal segment, with the proximal end of the distal segment connected to the distal end of the proximal segment. The distal segment has higher bending performance than the proximal segment. When the proximal or distal exposed portion of the guidewire is pulled, the distal segment of catheter 20 has higher bending performance than the proximal segment, making it easier to bend under the traction of the guidewire. This allows for precise control of the bending deformation of the distal segment by adjusting the movement distance of the guidewire, thereby adjusting the orientation of the distal end of catheter 20 and changing the angle between the distal end of catheter 20 and the outer surface of the covered stent. This results in a better relative angle between the needle tip of the puncture needle 10 placed in the puncture channel 21 and the outer surface of the covered stent. It should be noted that by giving the distal segment of catheter 20 high flexibility, during the adjustment of the distal orientation angle of catheter 20, the bending deformation of catheter 20 is mainly concentrated in the distal segment. The deformation of catheter 20 is concentrated in a local area, which reduces the impact of the overall bending deformation of catheter 20 on branch vessels. Furthermore, the branch vessels where catheter 20 is located have less binding resistance to the deformation of catheter 20, reducing the difficulty of adjusting the distal orientation of catheter 20.

[0065] In some embodiments, the proximal and distal segments are made of the same material, but the wall thickness of the distal segment is less than that of the proximal segment, resulting in higher bending performance of the distal segment compared to the proximal segment; that is, the distal segment exhibits better flexibility than the proximal segment. In some embodiments, the wall of the distal segment has multiple grooves extending circumferentially along the distal segment, and these grooves are staggered sequentially along the axial direction of the distal segment. In some embodiments, the proximal and distal segments are made of different materials, with the proximal segment having higher hardness and rigidity than the distal segment, resulting in higher bending performance of the distal segment compared to the proximal segment. The proximal and distal segments are connected as a single unit by laser welding, fusion welding, or adhesive bonding.

[0066] Furthermore, such as Figure 23 As shown, 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, allowing it to conform to the bending structure of the distal segment of the catheter 20, enabling the puncture portion 11 to smoothly pass through the distal segment of the catheter 20 and exit from the distal end face of the catheter 20. The puncture portion 11 has better rigidity, stiffness, 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 covered stent to complete the fenestration.

[0067] 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, thereby making the bending performance of the support portion 12 higher than that of the puncture portion 11, i.e., the support portion 12 has better flexibility than the puncture portion 11. In some embodiments, the tube wall of the support portion 12 is provided with multiple perforations (not shown in the figure), the perforations being elongated holes extending along the circumferential direction of the support portion 12, and the multiple elongated holes are arranged alternately 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 those of 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 to ensure that the puncture portion 11 can puncture the covered stent to complete the fenestration. The puncture part 11 and the support part 12 are connected as an integral structure by means of laser welding, soldering or adhesive bonding.

[0068] The length of the distal segment can be selected within an appropriate range based on the diameter and length of the branch vessel where catheter 20 is located. For example, when a covered stent covers the left subclavian artery and a fenestration is required at the junction of the left subclavian artery and the aorta, 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 to 50mm. For example, the length of the distal segment can be 10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, etc.

[0069] Please combine Figure 1 , Figure 4 , Figure 8 and Figure 19 As shown, the present invention also proposes a puncture system 100, which includes a catheter 20, a puncture needle 10, a handle 30, and an adjustment mechanism 40. The adjustment mechanism 40 is movably disposed on the handle 30. Specifically, the catheter 20 is provided with a puncture channel 21 penetrating the distal and proximal ends of the catheter 20. 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 face of the catheter 20, in order to facilitate fenestration of the covered stent.

[0070] In other embodiments, the catheter 20 further includes at least one traction channel 22 extending axially along 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 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 and proximal ends of the guidewire 200 to extend out of 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 face of the catheter 20, the handle 30 is provided with at least one guidewire channel 33. The distal end of the guidewire channel 33 is opposite to 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 is a double-lumen tube, which can simultaneously pass through the puncture needle 10 and the guidewire 200 used for traction. Furthermore, the guidewire 200 and the puncture mechanism share a handle 30, reducing additional instrument operations and lowering the difficulty of the surgery.

[0071] Furthermore, when the catheter 20 is provided with multiple traction channels 22, the handle 30 is provided with multiple guidewire channels 33. The multiple traction channels 22 and the multiple guidewire channels 33 are one to one, allowing multiple guidewires 200 to pass through in sequence. This allows the proximal and / or distal ends of the multiple guidewires 200 to be pulled separately to adjust the orientation of the distal end of the catheter 20 and the distal end of the puncture needle 10 at multiple angles.

[0072] In some embodiments, such as Figure 1 As shown, the adjustment mechanism 40 includes a moving component 41 that has 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 in its own axial direction. Therefore, the distance by which the distal end of the puncture needle 10 extends beyond the distal end of the catheter 20 can be controlled by the adjustment mechanism 40. This allows for precise quantitative control of the puncture distance of the puncture needle 10 during the fenestration operation of the covered stent in endovascular repair surgery, based on the differences in the diameter of human blood vessels and the size data of the covered stent and the puncture needle 10. On the basis of successful membrane rupture, this reduces the probability of the needle tip causing puncture injury to the intima of the covered stent and the blood vessel wall due to excessive puncture length of the puncture needle 10, thereby improving the success rate and safety of endovascular repair surgery.

[0073] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0074] Example 1

[0075] In this embodiment, combined with Figures 1-4 As shown, 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 housing 31 and a second housing 32 that are fastened together, defining a receiving cavity 34 between the first housing 31 and the second housing 32. At least a portion of the adjustment mechanism 40 is disposed within the receiving cavity 34.

[0076] The catheter 20 has a puncture channel 21 that passes through the distal and proximal ends of the catheter 20. A catheter lumen 36 is provided in the handle 30 on the distal side of the receiving cavity 34. The catheter lumen 36 extends in the axial direction and forms an opening at the distal end of the handle 30 for insertion of the catheter 20. A puncture needle lumen 38 is also provided on the handle 30 between the catheter lumen 36 and the receiving cavity 34. The two ends of the puncture needle lumen 38 are respectively connected to the catheter lumen 36 and the receiving cavity 34. The proximal end of the catheter 20 is inserted into the catheter lumen 36 and connected to the handle 30. The adjustment mechanism 40 includes a moving component 41 that has 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 located in the receiving cavity 34 and 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 by 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, thus completing the puncture action.

[0077] In this embodiment, the puncture needle 10 has a hollow tubular structure. A guide channel 37 is also provided in the handle 30 on the proximal side of the receiving cavity 34. The proximal part of the moving component 41 is movably disposed 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 moving component 41. After the puncture needle 10 punctures the membrane, the guide wire used to guide the branch stent is sequentially inserted into the stent membrane through the guide channel 37, the interior of the moving component 41, and the hole in the puncture needle 10.

[0078] 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 guide wire channel 33, which is opposite to and communicates with the traction channel 22, so that the guide wire can pass through the traction channel 22 and the guide wire channel 33 in sequence.

[0079] In some embodiments, such as Figure 17 As shown, the guidewire channel 33 forms a third opening 331 on the proximal end face of the handle 30, allowing the proximal exposed portion of the guidewire to extend from the proximal end face of the handle 30. When the operator pulls the proximal exposed portion of the guidewire, they can pull the guidewire proximal to the proximal end of the handle 30, facilitating the application of force. In this embodiment, the guidewire channel 33 includes a curved section 332 and a straight section 333. 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 structure of the curved section 332 makes at least a portion of the guidewire channel 33 curved, reducing the possibility of blood leakage through the guidewire channel 33 during surgery due to blood pressure.

[0080] In some embodiments, such as Figure 8 As shown, the guidewire channel 33 forms a third opening 331 on the outer peripheral surface of the handle 30, allowing the proximal exposed portion of the guidewire to extend from the outer peripheral surface of the handle 30. This position of the third opening 331 is as close as possible to the distal end of the handle 30, maintaining a large distance between the third opening 331 and the moving component 41 in the adjustment mechanism 40. This reduces interference between the two operations: pulling the proximal exposed portion of the guidewire and moving the moving component 41. In this embodiment, the guidewire channel 33 has an overall arc-shaped curved structure, reducing the possibility of blood leakage through the guidewire channel 33 during surgery due to blood pressure.

[0081] It should be noted that, as Figure 8 and Figure 17 As shown, at least a portion of the guidewire channel 33 has a curved structure. When the guidewire is inserted into the guidewire channel 33, the guidewire undergoes multiple continuous bends within the curved 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 leakage.

[0082] Example 2

[0083] 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 or distal exposed portion of the guidewire is pulled, the distal segment of the catheter 20 has higher bending performance than the proximal segment, making it easier to bend under the traction of the guidewire. This allows for precise control of the bending deformation of the distal segment by adjusting the movement distance of the guidewire, thereby adjusting the orientation of the distal end of the catheter 20 and changing the angle between the distal end of the catheter 20 and the outer surface of the covered stent. This results in a better relative angle between the needle tip of the puncture needle 10 placed in the puncture channel 21 and the outer surface of the covered stent. It should be noted that by giving the distal segment of catheter 20 high flexibility, during the adjustment of the distal orientation angle of catheter 20, the bending deformation of catheter 20 is mainly concentrated in the distal segment. The deformation of catheter 20 is concentrated in a local area, which reduces the impact of the overall bending deformation of catheter 20 on branch vessels. Furthermore, the branch vessels where catheter 20 is located have less binding resistance to the deformation of catheter 20, reducing the difficulty of adjusting the distal orientation of catheter 20.

[0084] In some embodiments, the proximal and distal segments are made of the same material, but the wall thickness of the distal segment is less than that of the proximal segment, thereby making the bending performance of the distal segment higher than that of the proximal segment, i.e., the distal segment has better compliance than the proximal segment.

[0085] In some embodiments, the wall of the distal segment is provided with a plurality of grooves, which are grooves extending along the circumferential direction of the distal segment, and the plurality of grooves are arranged alternately along the axial direction of the distal segment.

[0086] 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, resulting in higher bending performance of the distal segment. The proximal segment and the distal segment are connected as a single structure by means of laser welding, soldering, or adhesive bonding.

[0087] Furthermore, such as Figure 23As shown, 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 bending performance of the support portion 12 is higher than that of the puncture portion 11. The support portion 12 has higher bending performance than the puncture portion 11, allowing the support portion 12 to conform to the bending structure of the distal segment of the catheter 20, enabling the support portion 12 to smoothly pass through the distal segment of the catheter 20 and exit 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. During 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 to ensure that the puncture portion 11 can puncture the covered stent to complete the fenestration.

[0088] 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, thereby making the bending performance of the support portion 12 higher than that of the puncture portion 11, that is, the support portion 12 has better flexibility than the puncture portion 11.

[0089] In some embodiments, the tube wall of the support portion 12 is provided with a plurality of hollow portions (not shown in the figure), the hollow portions being elongated holes extending along the circumferential direction of the support portion 12, and the plurality of elongated holes being arranged alternately along the axial direction of the support portion 12.

[0090] In some embodiments, the puncture part 11 and the support part 12 are made of different materials, and the hardness and rigidity of the material of the puncture part 11 are higher than those of the support part 12, so that the bending performance of the support part 12 is higher than that of the puncture part 11. The puncture part 11 and the support part 12 are connected as an integral structure by means of laser welding, soldering or adhesive bonding.

[0091] The length of the distal segment can be selected within an appropriate range based on the diameter and length of the branch vessel where catheter 20 is located. For example, when a covered stent covers the left subclavian artery and a fenestration is required at the junction of the left subclavian artery and the aorta, 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 to 50mm. For example, the length of the distal segment can be 10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, etc.

[0092] It should be noted that the structures of the catheter 20 and puncture needle 10 in this embodiment can be combined with any of the foregoing embodiments, either individually or simultaneously, to form a solution with adaptability. All new solutions formed are within the protection scope of this application.

[0093] Example 3

[0094] The differences between Embodiment 3 and Embodiments 1 and 2 will be described below. Similarities or resemblances between Embodiment 3 and Embodiments 1 and 2 will not be repeated here. It should be understood that, where there is no structural conflict, the exemplary solutions of this embodiment can be combined with any of the foregoing embodiments to form solutions with adaptability, and all new solutions formed are within the protection scope of this application.

[0095] In this embodiment, please refer to Figure 1 , Figure 4 , Figure 8 , Figure 19 , Figure 24 and Figure 26 As shown, the adjustment mechanism 40 includes a limiting component 42 and a moving component 41. The limiting component 42 includes a limiting member 421 movably disposed on the handle 30. The moving component 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. With the movement of the limiting member 421, the limiting member 421 and the moving member 411 have multiple abutment states at multiple different positions in the axial direction, so that the moving component 41 has multiple quantitative movement distances in the axial direction.

[0096] Specifically, the contact state between the limiting member 421 and the moving member 411 along the axial direction means that during the process of the moving member 411 moving towards the distal end along the axial direction of the puncture needle 10, the distal end face of 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 towards the distal end, thereby giving the moving member 411 a directional movement distance.

[0097] Furthermore, the multiple contact states between the limiting member 421 and the moving member 411 along the axial direction mean that the limiting member 421 and the moving member 411 are in contact at multiple different positions in the axial direction of the puncture needle 10, and different contact states correspond to different directional movement distances of the moving member 411.

[0098] Understandably, as the limiting member 421 moves relative to the handle 30, the relative position between the limiting member 421 and the handle 30 changes, which in turn changes the contact state when the limiting member 421 and the moving member 411 come into contact, so that the limiting member 421 and the moving member 411 have multiple contact states.

[0099] In detail, the limiting member 421 has multiple modes of movement relative to the handle 30. These modes of movement include at least the following: the limiting member 421 moves relative to the handle 30 along the axial direction of the puncture needle 10; the limiting member 421 moves relative to the handle 30 along the radial direction of the puncture needle 10; or the limiting member 421 rotates about its own axis relative to the handle 30 along the radial direction of the puncture needle 10. Imagine that each mode of movement of the limiting member 421 changes the contact state between the limiting member 421 and the moving member 411. For example, when the limiting member 421 can move relative to the handle 30 along the axial direction of the puncture needle 10, the limiting member 421 can abut against the moving member 411 at multiple different positions in the axial direction, thereby allowing the moving member 411 to move multiple different quantitative distances in the axial direction.

[0100] For example, when the limiting member 421 can 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 moving member 411 along the radial direction of the puncture needle 10 also changes accordingly, thereby causing the limiting member 421 and the moving member 411 to be in contact at multiple different positions in the radial direction. When the multiple different positions are at different positions in the axial direction of the puncture needle 10, the moving member 411 can have multiple different quantitative movement distances in the axial direction.

[0101] The following will describe in detail three specific implementation schemes in which the limiting member 421 moves axially relative to the handle 30, moves radially relative to the handle 30, and rotates about its own axis.

[0102] Example 3.1

[0103] In this embodiment, please refer to Figure 24 , Figure 25 and Figure 26 As shown, the limiting member 421 can move relative to the handle 30 along the axial direction of the puncture needle 10. The limiting member 421 and the handle 30 have multiple relatively fixed positions arranged sequentially along the axial direction. When the limiting member 421 is in multiple different fixed positions, the limiting member 421 and the moving member 411 have multiple abutting states at multiple different positions along the axial direction.

[0104] Specifically, the relatively fixed position refers to the position where the moving part 411 and the limiting part 421 are fixedly connected. The fact that the limiting part 421 and the handle 30 have multiple relatively fixed positions arranged sequentially along the axial direction means that the limiting part 421 and the handle 30 have two states: relative movement and relative fixation. When the limiting part 421 and the handle 30 are in a relatively moving state, the limiting part 421 can move relative to the handle 30 along the axial direction of the puncture needle 10. When the limiting part 421 and the handle 30 are in a relatively fixed state, the limiting part 421 and the handle 30 are fixedly connected.

[0105] The relative fixed positions of the limiting member 421 and the handle 30 are arranged sequentially along the axial direction of the puncture needle 10. Multiple relative fixed positions can be arranged adjacent to each other along the axial direction of the puncture needle 10, or multiple relative fixed positions can be arranged at intervals along the axial direction of the puncture needle 10.

[0106] When multiple relatively fixed positions are sequentially arranged adjacent to each other along the axial direction of the puncture needle 10, the position of the limiting member 421 along the axial direction of the puncture needle 10 can be steplessly adjusted, thereby allowing the quantitative movement distance of the moving member 411 along the axial direction to be steplessly adjusted.

[0107] In some embodiments, such as Figure 24 and Figure 25 As shown, the handle 30 has a through groove 301a extending through its inner and outer sides. The length direction of the through groove 301a extends along the axial direction of the puncture needle 10. The handle 30 also has multiple slots 301b, one end of which communicates with the through groove 301a, and the other end of which extends along the radial direction of the puncture needle 10. The multiple slots 301b are arranged sequentially at intervals along the axial direction of the puncture needle 10. The limiting member 421 includes a main body 421a and a locking part 421b connected to the main body 421a. The locking part 421b passes through the through groove 301a and can slide within it. Furthermore, the locking part 421b can engage with each slot 301b, allowing the limiting member 421 to be fixed within different slots 301b. At this time, the limiting member 421 and the handle 30 are in a relatively fixed position. The moving member 411 includes a body portion 411a connected to the puncture needle 10 and an abutting portion 411b connected to the body portion 411a. The proximal end face of the body portion 421a can abut against the distal end face of the abutting portion 411b. As the locking portion 421b of the limiting member 421 is located in different slots 301b, the limiting member 421 and the moving member 411 are in multiple abutting states at multiple different positions along the axial direction.

[0108] In some embodiments, such as Figure 26As shown, the handle 30 has a through groove 301a extending through its inner and outer sides, with the length of the through groove 301a extending along the axial direction of the puncture needle 10. The limiting member 421 includes a main body 421a and a locking part 421b connected to the main body 421a. The locking part 421b passes through the through groove 301a and can slide within the through groove 301a. The locking part 421b is configured as a cylindrical structure and has external threads. One end of the locking part 421b opposite to the main body 421a is located outside the handle 30, and the main body 421a abuts against the inner wall of the receiving cavity 34. The limiting assembly 42 also includes a nut 413a that is threadedly engaged with the locking part 421b. By tightening the nut 413a at any position on the through groove 301a, the limiting member 421 is fixedly connected to the handle 30. The movable member 411 includes a body part 411a connected to the puncture needle 10 and an abutting part 411b connected to the body part 411a. The proximal end face of the body part 421a can abut against the distal end face of the abutting part 411b. As the nut 413a fixes the limiting member 421 at different positions in the through groove 301a, the limiting member 421 and the movable member 411 have multiple abutting states at multiple different positions along the axial direction.

[0109] Understandably, by fixing the limiting member 421 to the handle 30 with connecting parts such as nut 413a, the fixed connection position of the limiting member 421 and the handle 30 in the axial direction can be infinitely adjusted. Based on the differences in the diameter of human blood vessels and the size data of the covered stent and puncture needle 10, the puncture distance of the puncture needle 10 can be precisely controlled by infinitely adjusting the position of the limiting member 421 in the axial direction. On the basis of successful membrane rupture, the probability of the needle tip causing puncture injury to the inner membrane of the covered stent and the blood vessel wall due to excessive puncture length of the puncture needle 10 is reduced, thereby improving the success rate and safety of endovascular repair surgery.

[0110] Example 3.2

[0111] In this embodiment, please refer to Figures 1 to 22 As shown, the limiting member 421 can move radially relative to the handle 30. One of the limiting member 421 and the moving member 411 is provided with a plurality of first limiting parts 401, and the other of the two is provided with a second limiting part 402 that stops and cooperates with the first limiting part 401 along the axial direction of the puncture needle 10. The plurality of first limiting parts 401 are 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 part 402 can cooperate with different first limiting parts 401 respectively, so that the limiting member 421 and the moving member 411 have multiple abutment states at multiple different positions in the axial direction.

[0112] Understandably, the limiting member 421 and the moving member 411 can be configured in a variety of different structural forms.

[0113] The technical solutions of the limiting component 42 and the moving component 41 in this invention will be further described in detail below with reference to specific embodiments.

[0114] Example 3.2.1

[0115] In this embodiment, please refer to Figures 1 to 4 As shown, 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. The catheter 20 has a puncture channel 21 that 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. The catheter 20 has a traction channel 22 that passes through the distal and proximal ends of the catheter 20, through which a traction wire can pass.

[0116] like Figure 4 As shown, the handle 30 mainly serves to support the overall structure. The handle 30 includes a first housing 31 and a second housing 32 that are mated together, for example... Figure 4 The first housing 31 and the second housing 32 shown are the left housing and the right housing, respectively. The left housing and the right housing are arranged opposite each other and define a receiving cavity 34 between the left housing and the right housing. The left housing and the right housing are provided with two parallel first partitions 3101 and second partitions 3102. The first partitions 3101 and the second partitions 3102 are parallel to the axial direction of the puncture needle 10. When the left housing and the right housing are aligned, the two partitions divide the receiving cavity 34 into a lower space 341, a middle space 342 and an upper space 343 in a direction perpendicular to the partitions.

[0117] The moving assembly 41 includes a moving member 411 and a push slider 413b fixedly mounted on the moving member 411. The moving member 411 is a hollow tube, and the inner cavity of the moving member 411 allows a guide wire to pass through. The push slider 413b is fixedly mounted on 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 opposite to the second partition 3102 are respectively provided with first grooves 3103 extending axially. The push slider 413b is slidably inserted into the first groove 3103. The moving member 411 is movably disposed in the middle space 342 between the two partitions. The axial movement of the moving member 411 is restricted by the sliding engagement of the push slider 413b with the groove.

[0118] The limiting assembly 42 includes a limiting member 421, an adjusting key 43b, and a return spring 44b. The limiting member 421 includes a stop bar 421c and a first adjusting part 421d connected to the stop bar 421c. A support post 4211c is also provided on the stop bar 421c on the same side as the first adjusting part 421d. The support post 4211c extends radially along the puncture needle 10. The inner wall of the receiving cavity 34 is provided with a sleeve that inserts and mates with the support post 4211c. 1c is inserted into the sleeve in a radially slidable manner. The spring is sleeved on the support column 4211c and the sleeve, and the two ends of the spring abut against the stop bar 421c and the inner wall of the receiving cavity 34, respectively. Under the action of the elastic force of the spring, the stop bar 421c abuts against the second partition 3102. When the adjusting key 43b applies an upward pushing force to the first adjusting part 421d, it pushes the stop bar 421c to move away from the second partition 3102 (i.e., in the radial direction).

[0119] The movable member 411 has multiple first limiting portions 401 on its outer peripheral surface. These first limiting portions 401 are located at different positions along the axial direction of the puncture needle 10 and are arranged sequentially in a stepped manner. The proximal end face of the stop bar 421c forms a second limiting portion 402. When the limiting member 421 and the movable member 411 are in contact along the axial direction, the distal end face of one of the multiple first limiting portions 401 abuts against the proximal end face of the stop bar 421c.

[0120] Specifically, the handle 30, corresponding to the first adjustment part 421d and located on the side of the first partition 3101 opposite to the second partition 3102, is provided with a second slide groove 3104 extending axially. The adjustment key 43b includes a key body 43b1 located outside the handle 30 and a second adjustment part 43b2 slidably passing through the second slide groove 3104. The adjustment key 43b is located on the proximal side relative to the limiting member 421. The side of the first adjustment part 421d facing the proximal end is provided with a first inclined surface 421d1, and the side of the second adjustment part 43b2 facing the distal end is provided with a... As the adjustment key 43b slides in the second groove 3104 toward the distal end, the second inclined surface 43b21 abuts against the first inclined surface 421d1 and pushes the first adjustment part 421d to drive the stop bar 421c to move away from the second partition 3102. At this time, the distance between the stop bar 421c and the second partition 3102 increases, so that the stop bar 421c abuts against the first limit part 401 near the proximal end among the multiple first limit parts 401, so that the puncture needle 10 has a larger quantitative movement distance.

[0121] Conversely, if the adjustment key 43b slides towards the proximal end within the second slide groove 3104, under the action of the spring's elastic force, the elastic force pushes the first adjustment part 421d to move the stop bar 421c towards the direction closer to the second partition 3102. At this time, the distance between the stop bar 421c and the second partition 3102 increases, so that the stop bar 421c and the first limit part 401 near the distal end of the plurality of first limit parts 401 are in contact, so that the puncture needle 10 has a smaller quantitative movement distance.

[0122] Therefore, the stop bar 421c cooperates with multiple first limiting parts 401 to control the insertion length of the puncture needle 10. The adjustment key 43b is used to adjust the height of the stop bar 421c, and the return spring 44b is used to control the automatic return of the stop bar 421c after it has been raised. The stop adjustment key 43b moves axially toward the distal end (i.e., along the axial direction F11), raising the stop bar 421c in the longitudinal direction (i.e., the direction F12), thus changing the blocking distance of the stop bar 421c in front of the first limiting parts 401. This allows the push slider 413b to move, thereby moving the moving part 411 and the puncture needle 10 connected to it. When the stop adjustment key 43b moves axially toward the proximal end, the return spring 44b controls the raised stop bar 421c to automatically return to its original position.

[0123] Example 3.2.2

[0124] The differences between Example 3.2.2 and Example 3.2.1 will be described below. The similarities or similarities between Example 3.2.2 and Example 3.2.1 will not be repeated here.

[0125] In this embodiment, please refer to Figures 5 to 14 As shown, the handle 30 includes a first housing 31 and a second housing 32 that are mated together, for example, as Figure 4 The first housing 31 and the second housing 32 shown are the upper housing and the lower housing, respectively. The upper housing and the lower housing are arranged opposite each other and define the above-mentioned receiving cavity 34 between the upper housing and the lower housing.

[0126] The moving component 41 includes a moving part 411, which is a hollow cylindrical structure. 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 in communication with the inner cavity of the moving part 411.

[0127] like Figure 8As shown, a guide channel 37 is also provided in the handle 30 on the proximal side of the receiving cavity 34. The proximal portion of the moving member 411 is movably disposed 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 moving member 411 can be slidably inserted into the guide channel 37 from the distal end of the guide channel 37. The distal end of the guide channel 37 communicates with the puncture needle 10 through the inner cavity of the moving member 411. After the puncture needle 10 punctures the membrane, the guide wire used to guide the branch stent is sequentially inserted into the stent membrane through the guide channel 37, the interior of the moving member 41, and the hole in the puncture needle 10. Furthermore, a sliding limiting part 3401 is provided inside the receiving cavity 34. The sliding limiting part 3401 and the guide channel 37 are used to jointly limit the sliding of the moving member 411 relative to the handle 30 in the axial direction.

[0128] like Figure 9 As shown, a plurality of first limiting parts 401 are provided on the outer peripheral surface of the moving member 411, and the plurality of first limiting parts 401 are arranged sequentially along the axial direction of the puncture needle 10 and are arranged in a stepped manner.

[0129] The limiting assembly 42 includes a limiting member 421 and an adjusting knob 43c. One of the limiting member 421 and the adjusting knob 43c is provided with a slot, and the other is provided with a snap-fit, so that the adjusting knob 43c and the limiting member 421 are inserted and connected. The outer surface of the upper housing is provided with a radially extending third sliding groove 3105. The bottom wall of the third sliding groove 3105 is provided with a through hole 31051 communicating with the receiving cavity 34. The adjusting knob 43c is connected to the limiting member 421 through the through hole 31051.

[0130] The inner wall of the upper housing facing the receiving cavity 34 is provided with a radially extending fourth sliding groove 3106. The limiting member 421 includes a sliding part 421e slidably disposed in the fourth sliding groove 3106 and a limiting slider 421f connected to the sliding part 421e and cooperating with the stop of the first limiting part 401. The limiting member 421 is located on the far end relative to the first limiting part 401, and the proximal end face of the limiting slider 421f forms the aforementioned second limiting part 402.

[0131] As the knob 43c slides radially within the third groove 3105, the proximal end face (i.e., the second limiting part 402) of the limiting slider 421f can respectively abut against different first limiting parts 401, thereby controlling the insertion length of the puncture needle 10.

[0132] In detail, such as Figures 10-12 The figures show three contact states between the limiting slider 421f and the first limiting part 401. Figure 10The limiting slider 421f in the middle abuts against the distal end face of the first limiting part 401 located at the farthest end. In this state, the distance that the puncture needle 10 extends from the distal end of the catheter 20 is relatively short. Figure 11 The limiting slider 421f in the middle abuts against the distal end face of the first limiting part 401 located at the farthest end. In this state, the puncture needle 10 extends a longer distance from the distal end of the catheter 20. Figure 12 When the limiting slider 421f moves to a position where it no longer abuts against the first limiting part 401 and is no longer restricted axially, the puncture needle 10 extends the longest distance from the distal end of the catheter 20 in this state.

[0133] Example 3.2.3

[0134] The differences between Example 3.2.3 and Example 3.2.1 will be described below. The similarities or similarities between Example 3.2.3 and Example 3.2.1 will not be repeated here.

[0135] like Figures 15 to 22 As shown, in this embodiment, the limiting member 421 can rotate relative to the handle 30 around the axis of the puncture needle 10. The first limiting part 401 is provided on the limiting member 421, and multiple first limiting parts 401 are arranged sequentially along the circumferential direction of the puncture needle 10 and arranged in a stepped manner. The second limiting part 402 is provided on the moving member 411. As the limiting member 421 rotates relative to the handle 30 along the circumferential direction of the puncture needle 10 to different positions, the second limiting part 402 can respectively cooperate with different first limiting parts 401 to stop.

[0136] Specifically, please refer to Figures 5 to 22 As shown, the handle 30 includes a first housing 31 and a second housing 32 that are mated together, for example, as Figure 4 The first housing 31 and the second housing 32 shown are the upper housing and the lower housing, respectively. The upper housing and the lower housing are arranged opposite each other and define the above-mentioned receiving cavity 34 between the upper housing and the lower housing.

[0137] The moving component 41 includes a moving member 411, which includes a body portion 411a and an abutment portion 411b connected to the distal end of the body portion 411a. The body portion 411a has a hollow cylindrical structure, and the abutment portion 411b has a connecting channel communicating with the inner cavity of the body portion 411a. The proximal end of the puncture needle 10 is inserted into the inner cavity of the body portion 411a from the distal end of the connecting channel and is fixedly connected to the moving member 411. The inner cavity of the puncture needle 10 is in communication with the inner cavity of the body portion 411a.

[0138] A guide channel 37 is also provided in the handle 30 on the proximal side of the receiving cavity 34. The proximal portion of the body part 411a is movably disposed 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 body part 411a can be slidably inserted into the guide channel 37 from the distal end of the guide channel 37. The distal end of the guide channel 37 is connected to the puncture needle 10 through the inner cavity of the moving member 411. After the puncture needle 10 punctures the membrane, the guide wire used to guide the branch stent is sequentially inserted into the stent membrane through the guide channel 37, the interior of the moving member 411, and the hole in the puncture needle 10. Furthermore, a rotation limiting part 3402 is provided inside the receiving cavity 34, and the moving member 411 is located on the proximal side relative to the rotation limiting part 3402.

[0139] like Figure 20 and Figure 21 As shown, the limiting member 421 is cylindrical in shape and has a through hole 4212 penetrating its proximal and distal ends. The puncture needle 10 is coaxially arranged with the limiting member 421, and the limiting member 421 is rotatably disposed on the rotation limiting part 3402, so that the limiting member 421 can rotate relative to the handle 30 around the axis of the puncture needle 10. A plurality of first limiting parts 401 are provided at the proximal end of the limiting member 421. The plurality of first limiting parts 401 are arranged sequentially 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 parts 401 are respectively in different positions in the axial direction of the puncture needle 10. The distal end of the contact 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 contact states at multiple different positions along the axial direction, and the moving assembly 41 has multiple quantitative moving distances along the axial direction.

[0140] In this embodiment, as Figure 19 As shown, the outer peripheral surface of the limiting member 421 is also provided with a toggle roller 4213. The toggle roller 4213 is sleeved on the outside of the limiting member 421. The outer peripheral surface of the toggle roller 4213 is provided with multiple grooves to improve the roughness of the outer peripheral surface of the toggle roller 4213. At least part of the outer peripheral surface of the toggle roller 4213 is exposed outside the handle 30. The limiting member 421 is rotated by toggle the toggle roller 4213.

[0141] In some implementations, please combine Figures 19 to 22As shown, one of the handle 30 and the limiting member 421 is provided with a plurality of locking grooves 4214, and the other of the two is provided with a locking buckle 39 that engages with the locking grooves 4214. The plurality of locking grooves 4214 are arranged sequentially along the circumferential direction of the puncture needle 10 and along the axial direction of the puncture needle 10, each locking groove 4214 corresponds to a first limiting part 401. As the limiting member 421 rotates to different positions relative to the handle 30 around the axis of the puncture needle 10, the locking buckle 39 can engage with different locking grooves 4214 respectively and lock the limiting member 421 and the handle 30. Understandably, in this embodiment, by setting the locking groove 4214 and the locking buckle 39, when each of the first limiting parts 401 and the second limiting parts 402 are in position, the limiting part 421 and the handle 30 can be locked together by the locking groove 4214 and the locking buckle 39, so as to prevent the limiting part 421 from rotating relative to the handle 30 and ensure that the moving part has a fixed moving distance.

[0142] It should be noted that in some embodiments, the locking buckle 39 is used in conjunction with different locking grooves 4214 to disassemble and assemble the puncture system 100. For example, according to the required movement distance of the puncture needle 10, when assembling the puncture system 100, the locking groove 4214 corresponding to the quantitative movement distance is inserted and engaged with the locking buckle 39 so that the puncture needle 10 of the puncture system 100 has a certain quantitative movement distance. When it is necessary to change the quantitative movement distance of the puncture needle 10, the handle 30 and the limiting member 421 can be disassembled and their relative positions adjusted so that different locking grooves 4214 are inserted and engaged with the locking buckle 39.

[0143] It should also be noted that in some other embodiments, please refer to... Figures 19 to 22 As shown, both the locking groove 4214 and the locking buckle 39 extend along the axial direction of the puncture needle 10. The limiting member 421 can also move within the receiving cavity along the axial direction of the puncture needle 10 between a first position and a second position. When the limiting member 421 is in the first position, the locking buckle 39 can be inserted into the locking groove 4214 to lock the limiting member 421 and the handle 30. When the limiting member 421 is in the second position, the locking buckle 39 is pulled out from the locking groove 4214 to unlock the limiting member 421 and the handle 30.

[0144] For example, in some embodiments, a plurality of locking grooves 4214 may be provided on the inner wall of the receiving cavity of the handle 30, and a locking buckle 39 is provided on the limiting member 421. Specifically, the locking grooves 4214 are provided on the inner wall of the distal side of the receiving cavity, and the plurality of locking grooves 4214 are arranged sequentially at intervals around the circumferential direction of the puncture needle 10, and the locking grooves 4214 are recessed along the axial direction of the puncture needle 10 and toward the distal side. The locking buckle 39 is located on the distal end face of the limiting member 421, and the locking buckle 39 protrudes along the axial direction of the puncture needle 10 and toward the distal end. When the limiting member 421 moves to the first position along the axial direction of the puncture needle 10 in the receiving cavity, the locking buckle 39 can be inserted into the locking groove 4214 to lock the limiting member 421 and the handle 30. Alternatively, when the limiting member 421 moves to the second position along the axial direction of the puncture needle 10 in the receiving cavity, the locking buckle 39 is pulled out from the locking groove 4214 to unlock the limiting member 421 and the handle 30.

[0145] For example, in other implementations, such as Figure 19 As shown, a locking buckle 39 protrudes from the inner wall of the lower housing of the handle. The locking buckle 39 protrudes along the axial direction of the puncture needle 10 and toward the proximal end. The distal end of the limiting member 421 is provided with a plurality of locking grooves 4214. The locking grooves 4214 are arranged sequentially at intervals along the circumferential direction of the limiting member 421. The limiting member 421 can also reciprocate along the axial direction of the puncture needle 10 between the rotation limiting part 3402 and the distal inner wall of the receiving cavity 34, so that the locking buckle 39 can be inserted and engaged with different locking grooves 4214.

[0146] In this embodiment, as Figure 15 and Figure 16 As shown, the operation of adjusting the position of the limiting member 421 to match the different first limiting parts 401 and second limiting parts 402 is as follows: Figure 16 As shown, firstly, the limiting 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 limiting member 421; then, the roller 4213 is moved laterally along the direction F31" to adjust the angle of the limiting member 421 so that the first limiting part 401 of a suitable length contacts the distal end face (i.e., the second limiting part 402) of the abutment part 411b of the moving member 411, limiting the forward distance of the moving member 411, thereby controlling the protrusion length of the puncture needle 10. The roller is pushed forward (in the opposite direction to F31') to determine the appropriate length, so that the limiting member 421 moves to the first position, so that the locking groove 4214 and the locking buckle 39 engage, limiting the rotation of the limiting member 421 relative to the handle.

[0147] Example 4

[0148] The differences between Example 4 and Example 3 will be described below. The similarities or similarities between Example 4 and Example 3 will not be repeated here.

[0149] In this embodiment, the moving component 41 includes a moving member 411 that is movable relative to the handle 30 in the axial direction of the puncture needle 10, and the moving member 411 is provided with a first engagement structure extending along the axial direction of the puncture needle 10.

[0150] The adjustment mechanism 40 also includes a drive member, which is rotatably disposed on the handle 30. The drive member is provided with a second engagement structure that engages with the first engagement structure. By rotating the drive member, the moving member 411 can move at least a quantitative distance relative to the handle 30 in the axial direction of the puncture needle 10.

[0151] 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, the moving member 411 is driven to move axially, thereby achieving precise control of the moving distance of the moving member 411 in the axial direction.

[0152] Understandably, the first and second meshing structures can be meshing gear and rack structures, or meshing flywheel and chain structures, or threaded screw and nut mechanisms. By precisely controlling the rotation angle of the drive component, the quantitative movement distance of the moving component 411 along the axial direction can be steplessly adjusted.

[0153] Example 5

[0154] The differences between Embodiment 5 and Embodiments 1 to 4 will be described below. Similarities or resemblances between Embodiment 5 and Embodiments 1 to 4 will not be repeated here. It should be understood that, where there is no structural conflict, the exemplary solutions of this embodiment can be combined with any of the foregoing embodiments to form solutions with adaptability, and all new solutions formed are within the protection scope of this application.

[0155] In this embodiment, please refer to Figures 5 to 22 As shown, the handle 30 includes a first housing 31 and a second housing 32 that are fastened together. The first housing 31 and the second housing 32 define a receiving cavity 34. The inner wall of the first housing 31 is provided with a locking portion 311 protruding into the receiving cavity 34. The puncture system 100 also includes a locking assembly 50 connected to the moving assembly 41. The locking assembly 50 includes a locking member 51 disposed in the receiving cavity 34. The locking member 51 can reciprocate between a locked position and an unlocked position relative to the moving assembly 41 in the radial direction of the puncture needle 10. In the locked position, the locking member 51 engages with the locking portion 311 to lock the moving assembly 41. In the unlocked position, the locking member 51 separates from the locking portion 311 to unlock the moving assembly 41.

[0156] By setting the locking component 50, the moving component 41 will not slide when it is in the initial position, so as to prevent the needle from piercing out and damaging other accessories or packaging due to vibration during transportation.

[0157] The technical solution of the locking component 50 will be further described in detail below with reference to specific embodiments.

[0158] Example 5.1

[0159] It should be noted that, as Figure 7 As shown, by way of example, this embodiment adds a locking component 50 based on embodiment 3.2.2, the specific structure of which is shown below:

[0160] In this embodiment, as Figure 8 As shown, the moving assembly 41 also includes a support member 412 connected to the moving member 411. The support member 412 has a first guide portion 4121 extending radially along the puncture needle 10, and the locking member 51 has 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 sleeved on the other. The locking assembly 50 also includes an elastic member 52 and an unlocking key 53. The elastic member 52 is specifically a return spring. The elastic member 52 is sleeved on the outside of 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 abut against the support member 412 and the locking member 51, respectively. The unlocking key 53 is connected to the end of the locking member 51 away from the support member 412. The first housing 31 has a groove 35 extending axially along the puncture needle 10, and at least part of the unlocking key 53 extends out of the receiving cavity 34 through the groove.

[0161] 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. A first guide portion 4121 is provided on the wing portion 412b. A radially extending push block 413c is provided on the outer peripheral surface of the moving member 411 near the distal end. The tubular portion 412a is sleeved on the moving 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 near the proximal end of the tubular portion 412a, and the push block 413c can pass through the opening into the first limiting groove 412a1.

[0162] The locking member 51 is provided with a second limiting groove 512 corresponding to the first limiting groove 412a1. After the pushing block 413c passes through the first limiting groove 412a1, it is fitted 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.

[0163] One of the unlock button 53 and the locking component 51 is provided with a buckle, and the other of the two is provided with a slot. The unlock button 53 and the locking component 51 are connected by the cooperation of the buckle and the slot.

[0164] Specifically, such as Figure 5 , Figure 6 and Figure 8 As shown, the first housing 31 has a groove 35 extending axially along the puncture needle 10. The unlocking key 53 includes an unlocking key body 531 and a plug-in part 532. The locking member 51 has a plug-in groove 511a on the side opposite to the support member 412. The plug-in part 532 is slidably inserted into the groove, and the end of the plug-in part 532 opposite to the unlocking key body 531 extends into the receiving cavity 34 and is inserted into the plug-in 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.

[0165] In this embodiment, the locking and unlocking process of the unlocking component and the locking part 311 is as follows:

[0166] See Figure 13 and Figure 14 When the unlock button 53 is in the "zero position," the return spring causes the upper surface of the locking member 51 to contact the lower surface of the upper housing. The proximal end face of the locking part 311 and the distal end face of the locking member 51 abut against each other, preventing the unlocking assembly from sliding in its initial position. This prevents vibrations during transportation from causing the needle to puncture and damage other accessories or packaging. The proximal end face of the locking member 51 and the distal end face of the locking part 311 are mating bevels. See also... Figure 14 Pressing the unlock button 53 downwards compresses the return spring, causing the upper surface of the locking member 51 to be lower than the lower surface of the locking part 311. Pressing the unlock button 53 moves the locking member 51 forward. Since the end face of the near end of the locking member 51 and the end face of the far end of the locking part 311 are mating slopes when in the "zero position", when the unlock button 53 returns to the "zero position", the two slopes engage, preventing the locking part 311 from obstructing the movement of the locking member 51 toward the near end, thus facilitating the return of the unlock button 53 to the "zero position".

[0167] See Figure 5 , Figure 6 and Figure 8 As shown, the knob 43c moves along the radial direction F21 to select a suitable position, and the unlocking key 53 moves axially along the longitudinal direction F22 to drive the push rod and the puncture needle connected thereto to move.

[0168] Example 5.2

[0169] It should be noted that, please refer to... Figures 15 to 22 As shown, by way of example, this embodiment adds a locking component 50 based on embodiment 3.2.3, the specific structure of which is shown below:

[0170] In this embodiment, please refer to Figure 18 , Figure 19 and Figure 21 As shown, the moving member 411 includes a body portion 411a and an abutment portion 411b connected to the distal end of the body portion. The abutment 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 sleeved on the other. The locking assembly 50 also includes an elastic member 52 and an unlocking key 53. The elastic member 52 is sleeved on the outside of 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 abut against the abutment portion and the locking member 51, respectively. The unlocking key 53 is connected to the end of the locking member 51 away from the abutment portion. The first housing 31 is provided with a groove 35 extending axially along the puncture needle 10, and at least part of the unlocking key 53 extends out of the receiving cavity 34 through the groove.

[0171] Specifically, such as Figure 19 As shown, the unlocking key 53 includes an unlocking key body 531 and a plug-in part 532. The locking member 51 has a plug-in groove 511a on the side opposite to the support member 412. The plug-in part 532 is slidably inserted into the groove, and the end of the plug-in part 532 opposite to the unlocking key body 531 extends into the receiving cavity 34 and is inserted into the plug-in 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, thereby driving the puncture needle 10 to move axially to complete the puncture action.

[0172] In this embodiment, the locking and unlocking process of the unlocking component and the locking part 311 is as follows:

[0173] See Figure 15 and Figure 21 As shown, when the unlock button 53 is in the "zero position," the return spring causes the upper surface of the locking member 51 to contact the lower surface of the upper housing. The proximal end face of the locking part 311 and the distal end face of the locking member 51 abut against each other, preventing the unlocking assembly from sliding in its initial position. This prevents vibrations during transportation from causing the needle to puncture and damage other accessories or packaging. The distal end face of the locking part 311 is beveled. See also... Figure 16 and Figure 22Pressing down the unlock button 53 compresses the return spring, causing the upper surface of the locking member 51 to be lower than the lower surface of the locking part 311. Pressing the unlock button 53 moves the locking member 51 forward. The end face of the far end of the locking part 311 is inclined. Therefore, when the unlock button 53 returns to the "zero position", the locking member 51 moves towards the side closer to the abutment under the guidance of the inclined surface and compresses the return spring, preventing the locking part 311 from obstructing the movement of the locking member 51 towards the near end, so that the unlock button 53 can return to the "zero position".

[0174] Example 6

[0175] The differences between Embodiment 6 and Embodiments 1 to 5 will be described below. Similarities or resemblances between Embodiment 6 and Embodiments 1 to 5 will not be repeated here. It should be understood that, where there is no structural conflict, the exemplary solutions of this embodiment can be combined with any of the foregoing embodiments to form solutions with adaptability, and all new solutions formed are within the protection scope of this application.

[0176] like Figure 27 As shown, in this embodiment, at least the inner wall of the distal traction channel 22 is provided with a plurality of protrusions 222, which are arranged sequentially along the circumference of the traction channel. A guidewire can be inserted between adjacent protrusions 222. The protrusions 222 are elastic. During the process of pulling the distal exposed portion and / or proximal exposed portion of the guidewire 200 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 guidewire 200 undergoes axial movement within the traction channel 22. By providing a plurality of protrusions 222, when the guidewire 200 is pulled, it is deflected radially towards one side of the traction channel 22 under the influence of the tension. The elastic protrusions 222 deform, and the guidewire 200 is clamped in the gap between two adjacent protrusions 222. The guidewire undergoes elastic deformation under compression and reacts with elastic force on the guidewire 200. This causes the guidewire 200 to move axially within the traction channel and generate significant friction between itself and the protrusion 222. Therefore, when the distal or proximal exposed portion of the guidewire 200 is pulled, the interaction force between the protrusion 222 and the guidewire allows the traction force of the guidewire to act more effectively on the catheter. At the same time, the guidewire is circumferentially limited, thereby efficiently adjusting the orientation of the distal end of the catheter 20 and ensuring that the needle tip of the puncture needle 10 placed in the puncture channel 21 reaches the preset puncture posture.

[0177] In some embodiments, the protrusion 222 is conical in shape and has a certain elastic deformation capability. When pressure is applied to the protrusion 222 by the guide wire, the protrusion 222 undergoes elastic deformation. Multiple protrusions 222 are arranged sequentially along the circumference and axial direction of the traction channel, so that the protrusions 222 are evenly distributed in part or all of the guide wire channel.

[0178] 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 in embodiments 1 to 5 is also covered within the protection scope of this invention.

[0179] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope 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. The catheter has a puncture channel penetrating the distal and proximal ends and at least one traction channel. The handle has at least one guidewire channel, and one guidewire channel communicates with one traction channel. At least a portion of the puncture needle is located in the puncture channel and can move axially relative to the catheter. The distal end of the puncture needle can extend beyond the distal end face of the catheter. The guidewire channel and the traction channel are connected and the guidewire can pass through them. The two ends of the guidewire can extend out and be exposed at the distal end of the catheter and the handle, respectively. The portions exposed at the distal end of the catheter and the handle 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, so that the needle tip of the puncture needle placed in the puncture channel reaches the preset puncture posture. At least the distal end of the traction channel has a plurality of protrusions on its inner wall, and the plurality of protrusions are arranged sequentially along the circumferential direction of the inner wall of the traction channel, and the guide wire can be inserted between two adjacent protrusions.

2. The puncture system according to claim 1, characterized in that, The catheter is provided with multiple traction channels, which are spaced apart circumferentially along the catheter. The handle is provided with multiple guidewire channels, which are arranged opposite to each other. Multiple guidewires can pass through the opposing traction channels and guidewire channels, and the exposed parts of multiple guidewires can be pulled to adjust the orientation of the distal end of the catheter at multiple angles so that the needle tip of the puncture needle reaches the 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 being connected to the distal end of the proximal segment, and the bending performance of the distal segment being higher than that of the proximal segment. And / or, the puncture needle includes a support portion and a puncture portion connected to the distal end of the support portion, wherein the bending performance of the support portion is higher than that of the puncture portion.

4. The puncture system according to claim 1, characterized in that, At least some segments of the guidewire channel have a curved structure.

5. The puncture system according to any one of claims 1 to 4, characterized in that, The puncture system further includes an adjustment mechanism, which is at least partially located within the handle and connected to the proximal end of the puncture needle. The adjustment mechanism is used to control the distance by which the distal end of the puncture needle extends beyond the distal end of the catheter.

6. The puncture system according to claim 5, characterized in that, The adjustment mechanism includes a moving component, the proximal end of the puncture needle being connected to the moving component, the moving component having at least one quantitative movement distance relative to the handle along the axial direction of the puncture needle.

7. The puncture system according to claim 6, characterized in that, The adjustment mechanism further includes a limiting component, which includes a limiting member movably disposed on the handle. The moving component includes a moving member movable 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, the limiting member and the moving member have multiple abutment states at multiple different positions along the axial direction of the puncture needle, so that the moving component has multiple quantitative movement distances along the puncture needle.

8. The puncture system according to claim 7, characterized in that, The limiting member can move relative to the handle along 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 a second limiting portion along the axial direction of the puncture needle, which cooperates with the first limiting portion stop. 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 along the radial direction, the second limiting portion can cooperate with different first limiting portion stops, so that the limiting member and the moving member have multiple abutment states at multiple different positions along the axial direction of the puncture needle.

9. The puncture system according to claim 8, characterized in that, The limiting member can rotate relative to the handle around the axis of the puncture needle. The proximal end of the limiting member is provided with a plurality of first limiting parts, which are arranged sequentially and in a stepped manner along the circumferential direction of the limiting member. The moving member is provided with a second limiting part. As the limiting member rotates to different positions relative to the handle along the circumferential direction of the puncture needle, the second limiting part can respectively cooperate with different first limiting parts to stop, so that the limiting member and the moving member have multiple abutment states at multiple different positions along the axial direction of the puncture needle.

10. The puncture system according to claim 6, characterized in that, The handle has a receiving cavity, and the inner wall of the receiving cavity is provided with a locking part; The puncture system further includes a locking assembly, which includes a locking element, an elastic element, and an unlocking key. The locking element and the elastic element are disposed within the receiving cavity. The elastic element is arranged radially along the puncture needle, and both ends of the elastic element are respectively connected to the locking element and the moving assembly. One end of the unlocking key is connected to the locking element, and the other end of the unlocking key extends out of the receiving cavity. The unlock key and the elastic element can respectively drive the unlock key to switch between an unlock position and a locked position. In the locked position, the locking element is engaged with the locking part to lock the moving component. In the unlock position, the locking element is disengaged from the locking part to unlock the moving component.

11. The puncture system according to claim 10, characterized in that, The moving component includes a support member having a first guide portion extending radially along the puncture needle, and a locking member having a second guide portion extending radially along the puncture needle. One of the first guide portion and the second guide portion is slidably fitted over the other. An elastic member is fitted over the outside of the first guide portion and the second guide portion, or the elastic member is fitted over the inside of the first guide portion and the second guide portion. The two ends of the elastic member abut against the support member and the locking member, respectively.

Images