CN213963583U

CN213963583U - Blood vessel intracavity puncture device

Info

Publication number: CN213963583U
Application number: CN202022610457.8U
Authority: CN
Inventors: 黄献琛; 赫明; 潘鹏程; 龚霄雁
Original assignee: Suzhou Innomed Medical Device Co ltd
Current assignee: Suzhou Innomed Medical Device Co ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-08-17
Anticipated expiration: 2030-11-12

Abstract

The utility model relates to the technical field of medical equipment, in particular to a puncture device in a blood vessel cavity, which comprises a catheter, a puncture needle and an adjusting rod, wherein the puncture needle is arranged in the catheter in a penetrating way and comprises a needle head, a flexible section and a rigid section which are sequentially connected from a far end to a near end, and the puncture needle is provided with an adjusting cavity which is communicated along the length direction of the puncture needle; the distal end portion of adjusting the pole is for moulding the shape region in advance, the distal end of adjusting the pole can by the near-end opening that adjusts the chamber penetrates, and can to the distal end opening direction in regulation chamber is carried, and works as it carries extremely to mould the shape region in advance can resume to moulding the shape in advance during the flexible segment, with the syringe needle is adjusted to predetermineeing the angle along predetermineeing the direction. The utility model provides a piercing depth can select suitable regulation pole according to the blood vessel form for it has pertinence to adjust more, and adjusts the precision better, and adjusts the pole and can have multiple model, makes the control range wider, and adaptability is high.

Description

Blood vessel intracavity puncture device

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a puncture device in vascular cavity.

Background

With the development of minimally invasive surgery in recent years, the technology is more and more widely used in clinic, and at the same time, more complicated cases such as: in the reconstruction of the aortic branch blood vessel, the branch blood vessel is covered by a membrane and needs to be punctured; puncture of the atrial septum is required in left atrial appendage closure. The operation needs a certain angle adjustment in the blood vessel cavity to adapt to various shapes of blood vessel structures. The techniques used in clinical practice at present stage for this need are: the pre-shaping puncture needle, the adjustable bent sheath assistance, the balloon catheter assistance and the like can complete the treatment of some cases, but all have some defects: for the puncture needle after the pre-shaping, the shape is fixed after the shaping, and if the blood vessel is not suitable for the matching condition, the whole operation instrument needs to be taken out, so that the adaptability is not high; for the adjustable bent sheath assistance, the diameter of the sheath tube is generally larger due to the fact that the sheath tube is provided with the bending adjusting cavity, and the adjusting range is limited; for the assistance of the balloon catheter, a short-time ischemia phenomenon may be caused, and the balloon is large in volume and not easy to turn, so that the balloon catheter is not good in adaptability to a small angle or a complex blood vessel, and a needle head may be deviated during puncture.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a blood vessel intracavity piercing depth to solve the regulation and control scope that exists among the prior art and limited and the poor technical problem of adaptability.

To achieve the purpose, the utility model adopts the following technical proposal:

a puncture device in a blood vessel cavity comprises a catheter, a puncture needle and an adjusting rod, wherein the puncture needle is arranged in the catheter in a penetrating mode, the puncture needle comprises a needle head, a flexible section and a rigid section which are sequentially connected from a far end to a near end, and the puncture needle is provided with an adjusting cavity which is communicated along the length direction of the puncture needle; the distal end portion of adjusting the pole is for moulding the shape region in advance, the distal end of adjusting the pole can by the near-end opening that adjusts the chamber penetrates, and can to the distal end opening direction in regulation chamber is carried, and works as it carries extremely to mould the shape region in advance can resume to moulding the shape in advance during the flexible segment, with the syringe needle is adjusted to predetermineeing the angle along predetermineeing the direction.

As a preferred technical scheme of the intravascular puncture device, the intravascular puncture device further comprises a handle, the catheter, the puncture needle and the adjusting rod are connected to the handle, and the handle can control the position of the adjusting rod and control the puncture action of the puncture needle.

As a preferable technical scheme of the intravascular puncture device, the handle comprises a shell, a first luer connector, a second luer connector, an adjusting component and a puncture control component, wherein the first luer connector and the second luer connector are both arranged in the shell, the catheter and the puncture needle are connected through the first luer connector, and the puncture needle and the adjusting rod can be connected through the second luer connector; the adjusting assembly can control the position of the adjusting rod; the puncture control assembly can control the puncture action of the puncture needle.

As a preferred embodiment of the endovascular puncture device, the adjustment assembly comprises:

the adjusting end cover is connected with the end part of the shell in a sliding mode, the proximal end part of the adjusting rod can be fixedly connected with the adjusting end cover, the adjusting end cover is connected with an extending plate extending along the length direction of the puncture needle, and a plurality of first locking structures are arranged on the extending plate at intervals along the extending direction of the extending plate;

the casing is provided with a first sliding groove along the direction perpendicular to the length of the puncture needle, the control end of the locking control key is arranged in the first sliding groove in a sliding mode, the execution end of the locking control key is located in the casing, the execution end of the locking control key is provided with a second locking structure matched with the first locking structure, and the control end of the locking control key is controlled to slide in the first sliding groove to enable the first locking structure and the second locking structure to be locked or unlocked mutually.

In a preferred embodiment of the endovascular puncture device, the first locking structure is a first tooth, the second locking structure is a second tooth, and the first tooth and the second tooth can be engaged and locked.

As a preferable technical scheme of the intravascular puncture device, a supporting plate is arranged in the shell, and the extension plate can be slidably supported on the supporting plate.

As a preferred technical scheme of the intravascular puncture device, the puncture control assembly comprises a puncture control key, a second sliding groove is formed in the shell along the length direction of the puncture needle, the control end of the puncture control key is slidably arranged in the second sliding groove, the execution end of the puncture control key is located in the shell and fixedly connected with the puncture needle, and the control end of the puncture control key is controlled to slide in the second sliding groove so that the needle head can extend out of or retract into the catheter.

As a preferred technical scheme of the intravascular puncture device, the puncture control assembly further comprises a limit control key, a mounting hole is formed in the shell in the direction perpendicular to the length of the puncture needle, the limit control key is rotatably mounted in the mounting hole, the control end of the limit control key is positioned on the outer side of the shell, the execution end of the limit control key is positioned on the inner side of the shell, and the limit control key is controlled to rotate in the mounting hole to enable the execution end of the limit control key to block or avoid the puncture control key to slide towards the direction close to the far end.

As the preferable technical scheme of the intravascular puncture device, an internal thread is arranged in the mounting hole, and an external thread matched with the internal thread is arranged on the limit control key.

As a preferred technical scheme of the intravascular puncture device, the forming angle range of the pre-shaped area is 30-180 degrees.

The utility model has the advantages that:

the utility model provides a puncture device in the blood vessel cavity, a puncture needle and a catheter are assembled together in advance, an adjusting rod is inserted into an adjusting cavity during an operation, when the puncture device provided by the utility model is used for puncture, the adjusting cavity of the puncture needle is firstly sleeved on a guide wire, so that the puncture needle and the catheter are conveyed to the position near the position to be punctured along the guide wire, and then the guide wire is withdrawn; then selecting a proper type of adjusting rod according to the blood vessel form, and conveying the pre-shaped area of the adjusting rod to the flexible section of the puncture needle along the adjusting cavity, so that the needle head of the puncture needle can be adjusted to be aligned with the position to be punctured; finally, the puncture needle is pushed to make the needle head extend out of the catheter to perform puncture action. The utility model provides a piercing depth carries out the prepositioning back at pjncture needle and pipe, and the rethread regulation pole carries out final positioning to the syringe needle of pjncture needle to can select suitable regulation pole according to the blood vessel form, make the regulation have more pointed, the regulation precision is better, and adjusts the pole and can have multiple model, make the control range wider, adaptability is high.

Drawings

FIG. 1 is a schematic structural view of a catheter and a puncture needle in a vascular endoluminal puncture device according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a catheter, a puncture needle and an adjusting rod of the intravascular puncture device according to the embodiment of the present invention;

fig. 3 is a schematic structural view of a vascular puncture device provided in an embodiment of the present invention;

FIG. 4 is a schematic structural view of the endovascular puncture device provided in an embodiment of the present invention with the left shell removed;

FIG. 5 is a schematic structural view of the endovascular puncture device provided in an embodiment of the present invention with the left shell removed and the end cap adjusted;

FIG. 6 is a cross-sectional view of a vascular access device in accordance with an embodiment of the present invention;

FIG. 7 is an enlarged view of a portion of FIG. 6 at A;

fig. 8 is a partial enlarged view at B in fig. 6;

fig. 9 is a schematic structural view of a puncture device for puncturing a blood vessel in a blood vessel cavity according to an embodiment of the present invention;

FIG. 10 is an enlarged view of a portion of FIG. 9 at C;

FIG. 11 is a schematic structural view of a puncture device for puncturing an interatrial septum provided by an embodiment of the present invention;

fig. 12 is a partial enlarged view at D in fig. 11.

In the figure:

10. a conduit;

20. puncturing needle; 21. a needle head; 22. a flexible section; 23. a hard segment;

30. adjusting a rod;

40. a handle; 41. a housing; 411. a left shell; 412. a right shell; 413. a first sliding groove; 414. a second sliding groove; 42. a first luer fitting; 43. a second luer fitting; 441. adjusting the end cover; 442. an extension plate; 443. locking the control key; 444. a support plate; 451. a puncture control key; 452. and a limit control key.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 and 2, the utility model provides a blood vessel intracavity puncture device, including a catheter 10, a puncture needle 20 and an adjusting rod 30, the puncture needle 20 is inserted into the catheter 10, the puncture needle 20 includes a needle head 21, a flexible section 22 and a rigid section 23 which are connected in sequence from a distal end to a proximal end, optionally, the needle head 21 can be made of stainless steel, nitinol or plastic, the flexible section 22 can be made of single-strand or multi-strand metal wire, the rigid section 23 can be made of stainless steel, nitinol or plastic, but is not limited thereto, the puncture needle 20 is provided with an adjusting cavity which is through along the length direction thereof; the distal end portion of the adjusting rod 30 is a pre-shaped area, the distal end of the adjusting rod 30 can be penetrated through the proximal opening of the adjusting cavity and can be conveyed towards the distal opening direction of the adjusting cavity, and the pre-shaped area of the adjusting rod 30 can be restored to the pre-shaped shape when conveyed to the flexible section 22 of the puncture needle 20, so that the needle head 21 of the puncture needle 20 can be adjusted to a preset angle along a preset direction. It should be noted that the end near the operating end (i.e., handle 40, mentioned below) is the proximal end, and the end near the operating end (i.e., needle 21) is the distal end.

The puncture needle 20 and the catheter 10 are assembled in advance, the adjusting rod 30 is inserted into the adjusting cavity during the operation, specifically, when the puncture device provided by the utility model is used for puncture, firstly, the adjusting cavity of the puncture needle 20 is sleeved on the guide wire, so that the puncture needle 20 and the catheter 10 are conveyed to the position near the position to be punctured along the guide wire, and then the guide wire is withdrawn; then, selecting an adjusting rod 30 with a proper model according to the blood vessel shape, and conveying the pre-shaped area of the adjusting rod 30 to the flexible section 22 of the puncture needle 20 along the adjusting cavity, so that the needle head 21 of the puncture needle 20 can be adjusted to be aligned with the position to be punctured; finally, the puncture needle 20 is pushed, so that the needle head 21 extends out of the catheter 10 to perform a puncture action. The utility model provides a puncture device carries out pre-positioning back at pjncture needle 20 and pipe 10, and rethread regulation pole 30 carries out final location to the syringe needle 21 of pjncture needle 20 to can select suitable regulation pole 30 according to the blood vessel form, make the regulation have pertinence more, adjust the precision better, and adjust pole 30 and can have multiple model, make the control range wider, adaptability is high. Optionally, the pre-shaped area of the adjustment lever 30 is shaped at an angle in the range of 30-180 degrees to accommodate adjustment at various angles.

As shown in fig. 3, the puncture device of the present invention further includes a handle 40, the catheter 10, the puncture needle 20, and the adjustment lever 30 are all connected to the handle 40, and the handle 40 can control the position of the adjustment lever 30 and the puncture operation of the puncture needle 20. The handle 40 is provided to facilitate the connection and fixation of the catheter 10, the puncture needle 20 and the adjustment rod 30, and to facilitate the manipulation of the respective components.

Specifically, as shown in connection with fig. 4-8, handle 40 includes a housing 41, a first luer 42, a second luer 43, a regulating assembly, and a penetration control assembly. The housing 41 comprises a left shell 411 and a right shell 412, the left shell 411 and the right shell 412 are connected in a snap-fit manner, referring to fig. 4, 6 and 7, the first luer 42 is arranged in the housing 41, the catheter 10 and the puncture needle 20 are connected through the first luer 42, in the embodiment, the first luer 42 is a three-way connector, the proximal end of the puncture needle 20 penetrates through the first opening of the first luer 42 and penetrates out through the second opening of the first luer 42, the proximal end of the catheter 10 penetrates through the first opening of the first luer 42 and is located in the first luer 42, the third opening of the first luer 42 extends out of the housing 41, and the third opening is communicated with the cavity of the catheter 10, so that the catheter 10 can be cleaned through the third opening. Referring to fig. 5, 6 and 8, the second luer 43 is disposed in the housing 41, the puncture needle 20 and the regulating stem 30 can be connected through the second luer 43, in this embodiment, the second luer 43 is a two-way luer, the proximal end of the puncture needle 20 is penetrated by the first opening of the second luer 43 and is located in the second luer 43, the regulating stem 30 can be penetrated into the regulating cavity of the puncture needle 20 by the second opening of the second luer 43, the second opening of the second luer 43 protrudes out of the housing 41 through the end opening of the housing 41, and the puncture needle 20 can be cleaned through the second opening of the second luer 43.

The adjustment assembly is capable of controlling the position of the adjustment lever 30. Specifically, referring to fig. 3 to 6, the adjusting assembly includes an adjusting end cap 441 and a locking control key 443, the adjusting end cap 441 is slidably connected with the end of the housing 41, the proximal end portion of the adjusting rod 30 can be fixedly connected with the adjusting end cap 441, the adjusting end cap 441 is connected with an extending plate 442 extending along the length direction of the puncture needle 20, and a plurality of first locking structures are arranged on the extending plate 442 at intervals along the extending direction thereof; the housing 41 is provided with a first sliding groove 413 along a direction perpendicular to the length of the puncture needle 20, a control end of the locking control key 443 is slidably disposed in the first sliding groove 413, an execution end of the locking control key 443 is disposed in the housing 41, an execution end of the locking control key 443 is provided with a second locking structure engaged with the first locking structure, and the control end of the locking control key 443 slides in the first sliding groove 413 to lock or unlock the first locking structure and the second locking structure. The adjustment lever 30 can be fixed at different positions by locking the first locking structure of the extension plate 442 at different positions in the extension direction with the second locking structure of the lock control 443. Alternatively, the first locking structure can be a first tooth, the second locking structure can be a second tooth, and the first tooth and the second tooth can be meshed and locked; or the first locking structure can also be one of a clamping groove and a clamping protrusion, the second locking structure is the other of the clamping groove and the clamping protrusion, and the clamping protrusion and the clamping groove can be clamped and locked. Of course, the above is merely exemplary and not limiting. Further, a support plate 444 is provided in the housing 41, and the extension plate 442 is slidably supported by the support plate 444, thereby improving the stability of the extension plate 442.

The puncture control module can control the puncture operation of the puncture needle 20. Specifically, referring to fig. 3 to 6, the puncture control assembly includes a puncture control key 451, a second sliding groove 414 is formed in the housing 41 along the length direction of the puncture needle 20, a control end of the puncture control key 451 is slidably disposed in the second sliding groove 414, an execution end of the puncture control key 451 is located in the housing 41 and is fixedly connected to the puncture needle 20, and the control end of the puncture control key 451 is controlled to slide in the second sliding groove 414 so as to extend or retract the needle 21 out of or into the catheter 10. The puncture control key 451 is pushed in the direction close to the distal end along the second sliding groove 414 to extend the needle tip 21 of the puncture needle 20 out of the catheter 10 to perform the puncture action, and the puncture control key 451 is pushed in the direction close to the proximal end along the second sliding groove 414 to retract the needle tip 21 of the puncture needle 20 into the catheter 10 to avoid accidental injury to other blood vessels when the puncture action is not performed.

Further, the puncture control assembly further includes a limit control key 452, a mounting hole is formed in the housing 41 in a direction perpendicular to the length of the puncture needle 20, the limit control key 452 is rotatably mounted in the mounting hole, the control end of the limit control key 452 is located on the outer side of the housing 41, the execution end of the limit control key 452 is located on the inner side of the housing 41, and the control limit control key 452 rotates in the mounting hole to enable the execution end of the limit control key 452 to block or avoid the puncture control key 451 from sliding in a direction close to the distal end. The limit control key 452 can prevent the puncture needle 20 from sliding unplanned, and prevent the puncture needle from puncturing the blood vessel. Optionally, an internal thread is disposed in the mounting hole, an external thread matching with the internal thread is disposed on the limit control key 452, and the mounting hole is in threaded connection with the limit control key 452 to achieve rotational connection therebetween, but is not limited to this embodiment.

It should be noted that the adjusting rod 30 and the adjusting end cap 441 are installed only during the operation, and other parts are assembled when leaving the factory, with reference to fig. 9 and 10, the operation process of the intravascular puncture device provided by the present invention is as follows:

cleaning the catheter 10 and the puncture needle 20 through the first luer connector 42 and the second luer connector 43;

sleeving the adjusting cavity of the puncture needle 20 on a guide wire, conveying the puncture needle 20 and the catheter 10 to the position near the position to be punctured along the guide wire, and then withdrawing the guide wire;

selecting a proper type of adjusting rod 30 according to the blood vessel shape, and connecting the proximal end of the adjusting rod 30 with the adjusting end cover 441;

the hand-held adjusting end cap 441 penetrates the distal end of the adjusting rod 30 into the adjusting cavity of the puncture needle 20 through the second opening of the second luer connector 43, and when the pre-shaped area of the adjusting rod 30 is conveyed to the flexible section 22 of the puncture needle 20 along the adjusting cavity, the pre-shaped area of the adjusting rod 30 returns to the pre-shaped shape, so that the needle head 21 of the puncture needle 20 is adjusted to a preset angle along a preset direction;

the position of the adjusting rod 30 is finely adjusted by holding the end cover, so that the needle head 21 of the puncture needle 20 is opposite to the position to be punctured, and then the position of the adjusting rod 30 is locked by the locking control key 443;

rotating the limit control key 452 to enable the limit control key 452 to avoid the puncture control key 451 sliding towards the distal direction;

the puncture control button 451 is pushed to slide in the distal direction, and the needle tip 21 of the puncture needle 20 is extended out of the catheter 10 to perform a puncture operation at the position to be punctured.

Furthermore, the utility model provides a piercing depth not only is applicable to the puncture of blood vessel chamber, still is applicable to the interatrial septum puncture, as shown in fig. 11 and fig. 12, and its specific puncture process is with the same, no longer gives unnecessary details here.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The intravascular puncture device is characterized by comprising a catheter (10), a puncture needle (20) and an adjusting rod (30), wherein the puncture needle (20) is arranged in the catheter (10) in a penetrating manner, the puncture needle (20) comprises a needle head (21), a flexible section (22) and a rigid section (23) which are sequentially connected from a far end to a near end, and the puncture needle (20) is provided with an adjusting cavity which is communicated along the length direction of the puncture needle; the distal end portion of adjusting pole (30) is the shape region in advance, the distal end of adjusting pole (30) can by the near-end opening of adjusting the chamber penetrates, and can to the distal end opening direction in adjusting the chamber is carried, and works as the shape region is carried extremely in advance can resume to the shape of moulding in advance during flexible section (22), with syringe needle (21) are adjusted to predetermineeing the angle along predetermineeing the direction.

2. The endovascular puncture device according to claim 1, further comprising a handle (40), wherein the catheter (10), the puncture needle (20) and the adjustment rod (30) are all connected to the handle (40), and wherein the handle (40) is capable of controlling the position of the adjustment rod (30) and the puncture action of the puncture needle (20).

3. The endovascular puncture device according to claim 2, wherein the handle (40) comprises a housing (41), a first luer (42), a second luer (43), an adjustment assembly and a puncture control assembly, the first luer (42) and the second luer (43) being both arranged inside the housing (41), the catheter (10) and the puncture needle (20) being connected by the first luer (42), the puncture needle (20) and the regulation stem (30) being connectable by the second luer (43); the adjusting component can control the position of the adjusting rod (30); the puncture control assembly can control the puncture action of the puncture needle (20).

4. The endovascular puncture device of claim 3, wherein the adjustment assembly comprises:

an adjusting end cap (441) which is slidably connected with the end of the shell (41), the proximal end part of the adjusting rod (30) can be fixedly connected with the adjusting end cap (441), the adjusting end cap (441) is connected with an extending plate (442) which extends along the length direction of the puncture needle (20), and a plurality of first locking structures are arranged on the extending plate (442) at intervals along the extending direction of the extending plate;

the locking control key (443), a first sliding groove (413) is formed in the housing (41) along a direction perpendicular to the length of the puncture needle (20), a control end of the locking control key (443) is slidably disposed in the first sliding groove (413), an execution end of the locking control key (443) is located in the housing (41), a second locking structure matched with the first locking structure is disposed at the execution end of the locking control key (443), and the first locking structure and the second locking structure can be locked or unlocked by controlling the control end of the locking control key (443) to slide in the first sliding groove (413).

5. The endovascular puncture device of claim 4, wherein the first locking structure is a first tooth and the second locking structure is a second tooth, the first tooth and the second tooth being capable of interlocking engagement.

6. The endovascular puncture device according to claim 4, wherein a support plate (444) is provided within the housing (41), the extension plate (442) being slidably supported to the support plate (444).

7. The endovascular puncture device according to claim 3, wherein the puncture control assembly comprises a puncture control key (451), a second sliding groove (414) is formed in the housing (41) along the length direction of the puncture needle (20), a control end of the puncture control key (451) is slidably disposed in the second sliding groove (414), an execution end of the puncture control key (451) is located in the housing (41) and fixedly connected with the puncture needle (20), and the control end of the puncture control key (451) is controlled to slide in the second sliding groove (414) so as to extend or retract the needle (21) out of or into the catheter (10).

8. The endovascular puncture device according to claim 7, wherein the puncture control assembly further comprises a limit control key (452), the housing (41) is provided with a mounting hole along a direction perpendicular to the length of the puncture needle (20), the limit control key (452) is rotatably mounted in the mounting hole, the control end of the limit control key (452) is located outside the housing (41), the execution end of the limit control key (452) is located inside the housing (41), and the control of the limit control key (452) in the mounting hole enables the execution end of the limit control key (452) to block or avoid the sliding of the puncture control key (451) in the distal direction.

9. The endovascular puncture device according to claim 8, wherein an internal thread is provided in the mounting hole, and an external thread matching the internal thread is provided on the limit control key (452).

10. The endovascular puncture device according to any one of claims 1-9, wherein the pre-shaped region is shaped at an angle in the range of 30 ° -180 °.