CN115474972A

CN115474972A - Push-in subassembly and transvascular implant delivery device

Info

Publication number: CN115474972A
Application number: CN202211417330.1A
Authority: CN
Inventors: 曾世强; 张缝廉; 喻欣; 曾延华; 喻朗; 周国华; 李韵玲; 张龙燕; 张志杰; 鹿鹏飞
Original assignee: Beijing Puyi Shengji Technology Co ltd
Current assignee: Beijing Puyi Shengji Technology Co ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2022-12-16
Also published as: CN219983150U

Abstract

The invention provides an inward pushing assembly and a transvascular implant conveying device, and relates to the field of medical instruments, wherein the inward pushing assembly comprises a pushing wire and a limiting pipe; the push-pull wire body penetrates through the tube cavity of the limiting tube, and the far end of the body is provided with an elastic release ring; the elastic release ring has a tightening state which is retracted into the tube cavity of the limiting tube towards the proximal direction so as to be radially compressed and a release state which is pushed out of the tube cavity of the limiting tube towards the distal direction so as to be annular; the transvascular implant delivery device comprises an introducing pipe, a delivery catheter and the inward pushing assembly; wherein, the lumen internal diameter of introducing tube and the lumen internal diameter of conveying pipe all are greater than the lumen internal diameter of spacing pipe in the aforementioned subassembly that pushes away in. The invention can ensure that the implant is not completely released after being pushed out of the outer sheath tube and can be withdrawn back into the outer sheath tube again to readjust the release position, and can ensure that the actual release process is simple, quick and convenient to implement.

Description

Push-in subassembly and transvascular implant delivery device

Technical Field

The invention relates to the technical field of medical instruments, in particular to an inward pushing assembly and a transvascular implant conveying device.

Background

In the process of performing intravascular treatment in a transvascular interventional therapy mode, implants such as a stent, a filter, an occlusion device and the like are separated from a delivery device and are retained at a target point or a target position, and the fixation is continuously realized, and supporting, filtering, filling and the like are realized at the target point or the target position.

The method mainly comprises the following steps: the implant is conveyed and released by utilizing the outer sheath tube and the inner pushing assembly (multi-finger guide wire) arranged in the outer sheath tube, when the implant is loaded, the implant is tightly pressed in the outer sheath tube and placed at the front end of the inner pushing assembly, after the implant is conveyed in place, the outer sheath tube is kept still, the inner pushing assembly is pushed forwards aiming at a target position so as to push the implant forwards until the implant is pushed out of the outer sheath tube, in some structures, the implant is not connected with the inner pushing assembly, or the rear end of the implant is buckled with the front end of the inner pushing assembly, and in the structure, the implant is directly separated from the inner pushing assembly after being pushed out of the outer sheath tube; there are also configurations in which the trailing end of the implant is threadably engaged with the leading end of the pusher assembly, and in which it is desirable to secure the implant after it has been pushed out of the sheath (either by means of securing it primarily including anchoring of the implant itself to the vessel wall, or by means of a delivery device that also includes other cables that are specifically used to secure the implant) and then rotate the pusher assembly to disengage the implant from the pusher assembly.

However, in the above connection, the implant is either released directly at the target site after being pushed out of the outer sheath, so that the implant is not withdrawn and readjusted once it is released incorrectly (e.g., the release angle is not equal); or, after the implant is pushed out of the outer sheath, the implant can be released only by rotating the inner pushing assembly after the implant is fixed, although the implant is not released directly after the implant is pushed out of the outer sheath, and when the implant is pushed out of the outer sheath but the implant is not separated from the inner pushing assembly, the implant is withdrawn back into the outer sheath to readjust the release position, however, in the actual release, the implant needs to be fixed and the inner pushing assembly is rotated, the process is complicated and complicated, the vascular wall is easy to be damaged, and when the implant is fixed, the structure requirement of the implant is high when the implant needs to be anchored on the vascular wall, otherwise, an additional operation cable needs to be arranged to assist in fixing the implant, which has high requirement on the structure of a conveyor, high requirement on the skill of an operator (operation operator), and is inconvenient to implement.

There is a need to provide a delivery device that ensures that the implant is not fully released after it has been pushed out of the outer sheath tube, but that the implant can be withdrawn back into the outer sheath tube to readjust the release position, and that the actual release process is simple, quick and easy to implement.

Disclosure of Invention

The invention aims to provide an internal pushing assembly and a transvascular implant delivery device, which can ensure that the implant is not completely released after being pushed out of an outer sheath tube and can be withdrawn back into the outer sheath tube again to readjust the release position, and the actual release process is simple, quick and convenient to implement.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, embodiments of the present invention provide an inward pushing assembly, which is applied to a transvascular implant delivery device, and specifically, the inward pushing assembly includes a pushing wire and a limiting tube; the push-pull wire comprises a body, the body penetrates through the lumen of the limiting tube, and the far end of the body is provided with an elastic release ring; the elastic release ring has a tightening state of being contracted into the tube cavity of the limiting tube in the proximal direction so as to be radially compressed and a releasing state of being pushed out of the tube cavity of the limiting tube in the distal direction so as to be annular.

The push-in component is suitable for any implant with a limiting part which can be sleeved by an elastic release ring, and comprises but is not limited to a spherical instrument with a ring at the tail end or an instrument with other shapes, an occluder used for treating atrial septal and ventricular septal defects, a spherical instrument for filling a cerebral aneurysm body, a spherical therapeutic instrument in a body blood vessel and the like.

When the device is used, the elastic releasing ring at the far end of the push-pull wire is completely released at the far end side of the limiting pipe by a mode of pushing the push-pull wire relative to the limiting pipe in the far end direction, then the limiting part on the implant is sleeved in the elastic releasing ring at the far end of the push-pull wire, and next, the push-pull wire is pulled back in the near end direction relative to the limiting pipe, so that the elastic releasing ring at the far end of the push-pull wire is retracted into the tube cavity of the limiting pipe in the near end direction until the limiting part on the implant is locked at the far end of the limiting pipe, and the loading function of the implant is realized; when the implant needs to be released, after the release position is selected, the push-pull wire is pushed out in the far-end direction relative to the limiting tube, so that the elastic release ring at the far end of the push-pull wire is completely released at the far-end side of the limiting tube, and the implant can be completely released from the push-pull wire to achieve the implantation function.

When delivering the implant into the patient, the implant may be further loaded inside the larger diameter outer sheath (as a preferred loading method when the implant is made of an elastically deformable material), or may be directly exposed outside the outer sheath and fixed by an elastic release ring. In the release process, compare in prior art the rotatory release implant of screw thread, obviously need little a lot to the damage of vascular wall, and need not to release the implant again with the help of the fixed implant of other operation cables, can improve the convenience of release security and release process operation, practice thrift operation time, improve the operation success rate. In conclusion, the transvascular implant delivery device using the push-in assembly can ensure that the implant is not completely released after being pushed out of the outer sheath tube and can be withdrawn back into the outer sheath tube to readjust the release position, and can ensure that the actual release process is simple, quick and convenient to implement.

In some optional embodiments of this embodiment, in the push-pull wire, the distal end of the body is bent in the proximal direction and then fixedly connected to the body, so as to form a loop at the distal end of the body, and the distal end portion of the loop forms the elastic release ring.

Further preferably, in the push-pull wire, the distal end of the body is bent towards the proximal direction and then fixedly connected to a portion of the body near the distal end, or the distal end of the body is bent towards the proximal direction and then fixedly connected to a proximal portion of the body.

In other optional embodiments, in the push-pull wire, the distal end of the body is bent in the proximal direction, and then is inserted into the limiting tube from the distal end of the limiting tube and passes out of the limiting tube from the proximal end of the limiting tube, the distal end of the body is separated from other parts of the body, and the part of the body located on the distal end side of the limiting tube forms the elastic release ring.

In an optional implementation manner of this embodiment, it is preferable that, in the push-pull wire, an included angle is formed between a plane where the elastic release ring is located and a length direction of the body, and the included angle is greater than 0 degree and smaller than 180 degrees.

In an alternative embodiment of this embodiment, it is preferable that a push-pull handle is connected to a proximal end of the push-pull wire.

In an optional implementation manner of this embodiment, it is preferable that the proximal end of the limiting tube is provided with a positioning mechanism for fixing the proximal end of the pushing and pulling wire to the limiting tube.

Further preferably, the positioning mechanism adopts a knob assembly, the knob assembly comprises a tubular shell and a rotary rod which is installed in a threaded hole in the side surface of the tubular shell in a threaded manner, the far end of the tubular shell is connected to the near end of the limiting tube, a tube cavity of the tubular shell is communicated with a tube cavity of the limiting tube, and the push-pull wire penetrates through the tubular shell.

In an optional implementation manner of this embodiment, preferably, the limiting tube is formed by winding a spring wire.

In a second aspect, embodiments of the present disclosure provide a transvascular implant delivery device comprising an introducer tube, a delivery catheter, and the pusher assembly of any of the preceding embodiments; the inner diameter of the tube cavity of the leading-in tube and the inner diameter of the tube cavity of the conveying catheter are both larger than the inner diameter of the tube cavity of the limiting tube in the inward pushing assembly.

Because the transvascular implant delivery device provided by the embodiment of the present invention includes the push-in component provided by the first aspect, the transvascular implant delivery device provided by the embodiment of the present invention can achieve all the beneficial effects that the push-in component provided by the first aspect can achieve, and more specific implementation steps thereof can be obtained by referring to the following description.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of an overall structure of an inward pushing assembly in a released state of an elastic releasing ring of a push-pull wire according to an embodiment of the present invention;

FIG. 2 is a schematic view of a first step of delivery in the transvascular implant delivery device provided in this example;

FIG. 3 is a schematic view of a second step of delivery in the transvascular implant delivery apparatus provided in this embodiment;

FIG. 4 is a schematic view of a third step of the first state of the delivery in the transvascular implant delivery device provided in this embodiment;

FIG. 5 is a schematic view of a third step of a second state of delivery in the transvascular implant delivery device provided in this embodiment;

FIG. 6 is a schematic view of a fourth step of delivering the transvascular implant delivery device in the first state according to the present embodiment;

FIG. 7 is a schematic view of a fourth step of delivering the transvascular implant delivery device of the present embodiment in a second state;

FIG. 8 is a schematic view illustrating a fifth step of delivery in the transvascular implant delivery device of the present embodiment;

FIG. 9 is a schematic diagram illustrating a sixth step of delivery in the transvascular implant delivery device of this embodiment.

Icon: 100-an implant; 101-a limiting part; 1-drawing by pushing; 11-a body; 12-elastic ring release; 13-a push-pull handle; 2-a limiting pipe; 3-a positioning mechanism; 31-a tubular housing; 32-a rotating rod; 4-an introduction tube; 5-a delivery catheter.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "proximal", "distal", "front", "rear", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships customarily provided for use with products of the present invention, and are used merely for convenience in describing the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In particular, in the present invention, the end of the medical instrument close to the operator is the proximal end of the medical instrument, and the end of the medical instrument entering the blood vessel of the patient is the distal end of the medical instrument (the front end of the medical instrument is the distal end, and the rear end of the medical instrument is the proximal end).

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

The first aspect of the present embodiment provides an inward pushing assembly applied to a transvascular implant delivery device, specifically, referring to fig. 1, the inward pushing assembly comprises a pushing wire 1 and a limiting tube 2; the push-pull wire 1 comprises a body 11, wherein the body 11 penetrates through the lumen of the limiting tube 2, and the far end of the body 11 is provided with an elastic release ring 12; the elastic release ring 12 has a contracted state in which the elastic release ring is retracted into the lumen of the limiting tube 2 in the proximal direction and is radially compressed, and a released state in which the elastic release ring is pushed out of the lumen of the limiting tube 2 in the distal direction and is annular, and the elastic release ring 12 may be made of, but not limited to, nitinol, and has high elasticity.

The push-in component is suitable for any implant 100 with a limiting part 101 which can be sleeved by an elastic release ring 12, including but not limited to a spherical device with a ring at the tail end or other shaped devices, an occluder used for treating atrial septal and ventricular septal defects, a cerebral aneurysm tumor body filling spherical device, an intravascular spherical therapeutic device in vivo and the like.

When the device is used, the elastic release ring 12 at the far end of the push-pull wire 1 is completely released at the far end side of the limit tube 2 by pushing the push-pull wire 1 relative to the limit tube 2 in the far end direction, then the limit part 101 on the implant 100 is sleeved in the elastic release ring 12 at the far end of the push-pull wire 1, and next, the push-pull wire 1 is pulled back relative to the limit tube 2 in the near end direction, so that the elastic release ring 12 at the far end of the push-pull wire 1 is retracted into the tube cavity of the limit tube 2 in the near end direction until the limit part 101 on the implant 100 is locked at the far end of the limit tube 2, thereby realizing the loading function of the implant 100; when the implant 100 needs to be released, after the release position is selected, the push-pull wire 1 is pushed out in the distal direction relative to the limiting tube 2, so that the elastic release ring 12 at the distal end of the push-pull wire 1 is completely released at the distal side of the limiting tube 2, and the implant 100 can be completely released from the push-pull wire 1 to achieve the implantation function.

When delivering the implant 100 to the patient, the implant 100 may be further loaded inside the outer sheath having a larger diameter (as a preferred loading method when the implant 100 is made of an elastically deformable material), or may be directly exposed outside the outer sheath and fixed by the elastic release ring 12. In the release process, compare in prior art the rotatory release implant of screw thread, obviously need little a lot to the damage of vascular wall, and need not to release implant 100 again with the help of other operation cables fixed implant 100, can improve the convenience of release security and release process operation, practice thrift operation time, improve the operation success rate. In summary, the transvascular implant delivery device using the push-in assembly can ensure that the implant 100 is not completely released after the implant 100 is pushed out of the outer sheath, and the implant 100 can be withdrawn back into the outer sheath to readjust the release position, and can ensure that the actual release process is simple, fast and convenient to implement.

In addition, the second aspect of the present embodiment further provides a transvascular implant delivery device, referring to fig. 2 to 9, which includes an introduction tube 4, a delivery catheter 5 (i.e., the sheath tube) and the pushing assembly provided in the first aspect; wherein: the inner diameter of the lumen of the leading-in pipe 4 and the inner diameter of the lumen of the conveying catheter 5 are both larger than the inner diameter of the lumen of the limiting pipe 2 in the inward pushing assembly.

When in use, in the first step, as shown in fig. 2, the push-pull wire 1 is pushed out in the distal direction relative to the limiting tube 2, so that the elastic release ring 12 at the distal end of the push-pull wire 1 is completely released at the distal end side of the limiting tube 2, and then the limiting part 101 on the implant 100 is sleeved in the elastic release ring 12 at the distal end of the push-pull wire 1, specifically, the elastic release ring 12 is sleeved at the narrow part between the implant 100 body and the limiting part 101 thereon;

secondly, as shown in fig. 3, the push-pull wire 1 is pulled back towards the proximal direction relative to the limiting tube 2, so that the elastic release ring 12 at the distal end of the push-pull wire 1 is retracted into the tube cavity of the limiting tube 2 towards the proximal direction until the limiting part 101 on the implant 100 is locked at the distal end of the limiting tube 2, and the implant 100 is loaded, and the step and the first step complete the fixation and the preparation delivery of the implant 100;

third, as shown in FIGS. 4 and 5, the proximal end of the pusher assembly is inserted into the introducer tube 4 from the distal end of the introducer tube 4 and pulled out from the proximal end of the introducer tube 4 until the distal end of the pusher assembly and the implant 100 are tightened and pre-installed in the introducer tube 4;

fourthly, as shown in fig. 6 and 7, aligning the distal end of the introducing tube 4 with the proximal end of the delivery catheter 5, and pushing the limiting tube 2 in the distal direction until the implant 100 reaches the front end of the lumen of the delivery catheter 5;

fifthly, after the target part is determined to be proper, the conveying catheter 5 is retreated relative to the limiting tube 2, so that the integral far end of the internal pushing assembly and the implant 100 are pushed out of the front end of the conveying catheter 5;

sixthly, as shown in fig. 9, it is determined that the implant 100 has no abnormality, the push-pull wire 1 is pushed out in the distal direction with respect to the limiting tube 2, so that the elastic release ring 12 at the distal end of the push-pull wire 1 is completely released at the distal end side of the limiting tube 2 to be in a ring-shaped release state, and the release and release process of the implant 100 is completed.

Since the transvascular implant delivery device provided by the second aspect of this embodiment includes the push-in assembly provided by the first aspect of this embodiment, the specific structure and the achievable effect of the transvascular implant delivery device provided by this embodiment can be obtained by referring to each optional or preferred embodiment of the push-in assembly, and all the beneficial effects that the push-in assembly can achieve can be achieved.

More specifically, in the above-mentioned pushing-in assembly and the transvascular implant delivery device including the same provided by this embodiment, further:

in some alternative embodiments, in the push-pull wire 1, the distal end of the body 11 is bent in the proximal direction and then fixedly connected to the body 11, so as to form the above-mentioned ferrule at the distal end of the body 11, and the distal end portion of the ferrule forms the above-mentioned elastic release ring 12. The position of the body 11 after bending and fixedly connecting to the body 11 may be a position on the body 11 near the distal end, or a proximal end of the body 11, and the specific fixing and connecting manner includes, but is not limited to, welding, fusing, or bonding.

In other alternative embodiments, in the push-pull wire 1, the distal end of the body 11 is bent in the proximal direction, and then inserted into the limiting tube 2 from the distal end of the limiting tube 2 and passes out of the limiting tube 2 from the proximal end of the limiting tube 2, the distal end of the body 11 is separated from other parts of the body 11, and the part of the body 11 located on the distal side of the limiting tube 2 forms the elastic release ring 12.

In some alternative embodiments: in the push-pull wire 1, an included angle is formed between the plane where the elastic release ring 12 is located and the length direction of the body 11, and the included angle is larger than 0 degree and smaller than 180 degrees, so that the operation is more convenient.

In some alternative embodiments, as shown in fig. 1, the proximal end of the push wire 1 is preferably further connected with a push-pull handle 13.

With continuing reference to fig. 1 to 9, and in particular to fig. 1, in this embodiment, it is preferable that a positioning mechanism 3 for fixing the proximal end of the push-pull wire 1 to the limiting tube 2 is disposed at the proximal end of the limiting tube 2, and by the positioning mechanism 3, it can be further ensured that the elastic release ring 12 does not loosen during the transportation process, and the transportation stability of the implant 100 is ensured, and of course, the positioning mechanism 3 may not be disposed, and the push-pull wire 1 can be positioned on the limiting tube 2 by the way of interference fit between the limiting tube 2 and the push-pull wire 1, and a driving force is given to the push-pull wire 1, and the push-pull wire 1 can move relative to the limiting tube 2, or the proximal end of the push-pull wire 1 can be fixed to the limiting tube 2 by winding the push-pull wire 1 around the proximal end of the limiting tube 2 for a plurality of turns after the push-pull wire 1 is fixed to the limiting tube 2, or the push-pull wire 1 and the limiting tube 2 can be positioned by other ways.

Further preferably, as shown in fig. 1, the positioning mechanism 3 employs a knob assembly, the knob assembly includes a tubular housing 31 and a rotary rod 32 which is threadedly mounted on a threaded hole on the side surface of the tubular housing 31, the distal end of the tubular housing 31 is connected to the proximal end of the limiting tube 2, the lumen of the tubular housing 31 is communicated with the lumen of the limiting tube 2, the push-pull wire 1 passes through the tubular housing 31, and the function of fixing or releasing the push-pull wire 1 on the limiting tube 2 is achieved by rotating the rotary rod 32.

In some optional embodiments of this embodiment, as shown in fig. 1 to 9, it is preferable that the limiting tube 2 is formed by winding a spring wire, so as to ensure flexibility of the limiting tube, facilitate penetration into a tortuous blood vessel, and reduce injury to the blood vessel during a surgery.

Finally, it should be noted that: all the embodiments in the specification are described in a progressive mode, the emphasis of each embodiment is on the difference from other embodiments, and the same and similar parts among the embodiments can be referred to each other; the above embodiments in the present specification are only used for illustrating the technical solution of the present invention, and not for limiting the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An inner pushing component applied to a transvascular implant delivery device, characterized in that: the inner pushing assembly comprises a pushing and drawing wire (1) and a limiting pipe (2); the push-pull wire (1) comprises a body (11), the body (11) penetrates through a tube cavity of the limiting tube (2), and the far end of the body (11) is provided with an elastic release ring (12);

the elastic release ring (12) has a tightening state of being retracted into the lumen of the limiting tube (2) in the proximal direction so as to be radially compressed and a release state of being pushed out of the lumen of the limiting tube (2) in the distal direction so as to be annular.

2. The push-in assembly of claim 1, wherein: in the push-pull wire (1), the far end of the body (11) is bent towards the near end direction and then fixedly connected to the body (11) so as to form a ferrule at the far end of the body (11), and the far end part of the ferrule forms the elastic release ring (12).

3. The push-in assembly of claim 2, wherein: in the push-pull wire (1), the far end of the body (11) is bent towards the near end direction and then fixedly connected to the part, close to the far end, of the body (11), or the far end of the body (11) is bent towards the near end direction and then fixedly connected to the near end part of the body (11).

4. The push-in assembly of claim 1, wherein: in the push-pull wire (1), the far end of the body (11) is bent towards the near end direction and then inserted into the limiting pipe (2) from the far end of the limiting pipe (2) and penetrates out of the near end of the limiting pipe (2) from the limiting pipe (2), the far end of the body (11) is separated from other parts of the body (11), and the part of the body (11) located at the far end side of the limiting pipe (2) forms the elastic release ring (12).

5. The push-in assembly of claim 1, wherein: in the push-pull wire (1), an included angle is formed between the plane where the elastic release ring (12) is located and the length direction of the body (11), and the included angle is larger than 0 degree and smaller than 180 degrees.

6. The push-in assembly of claim 1, wherein: the near end of the push-pull wire (1) is connected with a push-pull handle (13).

7. The push-in assembly of claim 1, wherein: the near end of the limiting pipe (2) is provided with a positioning mechanism (3) which is used for fixing the near end of the push-pull wire (1) on the limiting pipe (2).

8. The push-in assembly of claim 7, wherein: positioning mechanism (3) adopt knob subassembly, knob subassembly include tubulose casing (31) and screw thread install in screw rod (32) of screw hole on tubulose casing (31) side, the distal end of tubulose casing (31) connect in the near-end of spacing pipe (2) just the lumen of tubulose casing (31) with the lumen intercommunication of spacing pipe (2), it passes to push away wire (1) tubulose casing (31).

9. The push-in assembly of claim 1, wherein: the limiting pipe (2) is formed by winding a spring wire.

10. A transvascular implant delivery device, comprising: comprising an introducer tube (4), a delivery catheter (5) and the push-in assembly of any one of claims 1 to 9; the inner diameter of the tube cavity of the leading-in tube (4) and the inner diameter of the tube cavity of the conveying catheter (5) are both larger than the inner diameter of the tube cavity of the limiting tube (2) in the inward pushing assembly.