阅读说明：本技术 覆膜支架后释放装置和覆膜支架植入系统 (Post-stent-graft release device and stent-graft implantation system ) 是由 郑殿会 刘颖 于 2020-07-31 设计创作，主要内容包括：本发明提供覆膜支架后释放装置和覆膜支架植入系统,涉及医疗器械技术领域,包括导向座、拉线座、锁定结构以及由柔性材料制成的第一拉线和多条第二拉线；第一拉线盘绕于导向座外或内周面,且其一端固定连接于拉线座,锁定结构将其另一端固定于导向座；多条第二拉线一端均固定连接于导向座,自由端均被固定于第一拉线和导向座之间；拉线座朝远离导向座方向移动情况下,第一拉线能够脱离于导向座,从而释放多条第二拉线的自由端。本发明缓解了现有覆膜支架后释放装置极易划伤血管,造成血管损伤甚至破裂,且释放覆膜支架近端时,覆膜支架近端部位各处同时被释放向外弹开,会对血管造成较大损伤,从而,导致手术难度高、手术成功率低的技术问题。(The invention provides a covered stent post-release device and a covered stent implantation system, which relate to the technical field of medical instruments and comprise a guide seat, a stay wire seat, a locking structure, a first stay wire and a plurality of second stay wires, wherein the first stay wire and the plurality of second stay wires are made of flexible materials; the first wire drawing coil is wound outside or on the inner circumferential surface of the guide seat, one end of the first wire drawing coil is fixedly connected with the wire drawing seat, and the other end of the first wire drawing coil is fixed on the guide seat by the locking structure; one end of each of the second pull wires is fixedly connected with the guide seat, and the free end of each of the second pull wires is fixed between the first pull wire and the guide seat; under the condition that the pull wire seat moves towards the direction far away from the guide seat, the first pull wire can be separated from the guide seat, so that the free ends of the second pull wires are released. The invention solves the technical problems that the existing release device behind the covered stent is easy to scratch the blood vessel to cause the damage and even the rupture of the blood vessel, and when the near end of the covered stent is released, all parts of the near end part of the covered stent are simultaneously released to be outwards bounced to cause larger damage to the blood vessel, thereby causing high operation difficulty and low operation success rate.)

1. The utility model provides a release behind tectorial membrane support which characterized in that: comprises a guide seat (100), a stay wire seat (200), a first stay wire (300), a second stay wire (400) and a locking structure;

the first pull wire (300) and the second pull wire (400) are both made of a flexible material;

the direction extending from the near end of the guide holder (100) to the far end of the guide holder (100) is taken as the axial direction of the guide holder (100), the direction extending from the near end of the wire pulling holder (200) to the far end of the wire pulling holder (200) is taken as the axial direction of the wire pulling holder (200), a first mounting through hole (101) penetrating through the guide holder (100) along the axial direction of the guide holder (100) is arranged on the guide holder (100), and a second mounting through hole (201) penetrating through the wire pulling holder (200) along the axial direction of the wire pulling holder (200) is arranged on the wire pulling holder (200);

the first pull wire (300) is wound on the outer peripheral surface of the guide seat (100) or the inner peripheral surface of the guide seat (100), one end of the first pull wire (300) is fixedly connected to the pull wire seat (200), and the other end of the first pull wire (300) is fixed to the guide seat (100) by the locking structure;

the second pull wires (400) are provided with a plurality of pull wires, one ends of the second pull wires (400) are fixedly connected to the guide seat (100), the second pull wires (400) are distributed around the radial circumferential surface of the guide seat (100) at intervals in pairs, the other ends of the second pull wires (400) are used as free ends of the second pull wires (400), and the free ends of the second pull wires (400) are fixed between the first pull wires (300) and the guide seat (100); and the first wire (300) can be separated from the guide holder (100) under the condition that the wire holder (200) moves towards the direction far away from the guide holder (100), so that the free ends of the second wires (400) are released.

2. The stent graft post-release device of claim 1, wherein: the locking structure comprises a spiral groove (510) arranged on the outer peripheral surface of the guide holder (100) or the inner peripheral surface of the guide holder (100), and the notch of the spiral groove (510) is configured to be capable of pressing and fixing a first pull wire (300) arranged inside the spiral groove (510), so that the free end of the second pull wire (400) is pressed and fixed between the groove wall of the spiral groove (510) and the first pull wire (300).

3. The stent graft post-release device of claim 2, wherein: the locking structure further comprises an elastic tube (520), the elastic tube (520) is fixed inside the spiral groove (510), and the first pull wire (300) is fixed inside the elastic tube (520) in a pressing manner; alternatively, the elastic tube (520) is press-fixed to the inside of the spiral groove (510), and the first wire (300) is fixed to the inside of the elastic tube (520).

4. The stent graft post-release device of claim 3, wherein: the elastic tube (520) includes a plurality of segments spaced apart from each other two by two.

5. The post-stent graft release device of any one of claims 2 to 4, wherein: the depth of the spiral groove (510) is greater than the thickness of the first wire (300) in a direction perpendicular to the length of the first wire (300) itself.

6. The stent graft post-release device of claim 3 or 4, wherein: the depth of the spiral groove (510) is greater than the diameter of the elastic tube (520).

7. The post-stent graft release device of any one of claims 2 to 4, wherein: the guide seat (100) is further provided with a first pull wire penetrating hole (110), one end of the first pull wire penetrating hole (110) is communicated with the end face of the far end of the guide seat (100), and the other end of the first pull wire penetrating hole (110) is communicated with the part, close to the far end of the guide seat, of the spiral groove.

8. The post-stent graft release device of any one of claims 1 to 4, wherein the locking structure comprises a resilient locking ring (530), the resilient locking ring (530) configured to: one end of the first pull wire (300) far away from the pull wire seat (200) can be fixed on the outer peripheral surface of the guide seat (100) in a pressing mode, or one end of the first pull wire (300) far away from the pull wire seat (200) can be fixed on the inner peripheral surface of the guide seat (100) in a pressing mode.

9. The stent graft post-release device according to claim 8, wherein a lock ring fixing groove (120) extending in a radial circumferential direction of the guide holder (100) is further provided on an inner circumferential surface of the guide holder (100) or an outer circumferential surface of the guide holder (100).

10. The stent graft post-release device of claim 9, wherein: the depth of the shackle fixing groove (120) is greater than the ring body thickness of the elastic shackle (530).

11. The stent graft post-release device of claim 1, wherein: the locking structure comprises a first wire fixing groove (540) arranged on the outer circumferential surface of the guide holder (100) or the inner circumferential surface of the guide holder (100);

the first string fixing groove (540) includes a first fixing groove (541) and a second fixing groove (542); one end of the first fixing groove (541) is connected to one end of the second fixing groove (542), and the depth of the second fixing groove (542) is greater than that of the first fixing groove (541);

the first pulling wire (300) passes through the first fixing groove (541); an end of the first wire (300) far away from one end of the wire pulling seat (200) is provided with an elastic limiting head (310), the elastic limiting head (310) is configured to be compressed until the maximum thickness of the elastic limiting head (310) is smaller than the depth of the first fixing groove (541), and under the condition that the elastic limiting head (310) is not compressed, the maximum thickness of the elastic limiting head (310) is larger than the depth of the first fixing groove (541);

the notch of the second fixing groove (542) is configured to retain the elastic retaining head (310) within the second fixing groove (542).

12. The post stent graft release device of any one of claims 1 to 4 and 11, wherein: a ferrule (410) is arranged at the free end of each second pull wire (400), and the first pull wire (300) sequentially passes through the ferrules (410) at the free ends of the second pull wires (400).

13. The post stent graft release device of any one of claims 1 to 4 and 11, wherein: be provided with solid fixed ring (210) on acting as go-between seat (200), the one end of first acting as go-between (300) with pass solid fixed ring (210) back mode fixed connection of knoing in act as go-between seat (200).

14. The post stent graft release device of any one of claims 1 to 4 and 11, wherein: a plurality of bosses (130) are arranged on the outer peripheral surface of the guide holder (100), and the plurality of bosses (130) are configured to be capable of hooking a proximal end hanging ring of the covered stent (600) on the guide holder (100).

15. The stent graft post-release device of claim 14, wherein: each boss (130) is provided with a boss through hole (1301), and the opposite end of the free end of the second pull wire (400) is fixedly connected into the boss through hole (1301).

16. The post stent graft release device of any one of claims 1 to 4 and 11, wherein: a plurality of second stay wire limiting grooves (140) are formed in the outer peripheral surface of the guide seat (100) or the inner peripheral surface of the guide seat (100), the second stay wire limiting grooves (140) correspond to the second stay wires (400) in a one-to-one mode, and one ends of the second stay wire limiting grooves (140) extend to the end face of the far end of the guide seat (100).

17. The stent graft post-release device of claim 16, wherein: the depth of the second stay wire limiting groove (140) is larger than the thickness of the second stay wire (400) in the direction perpendicular to the length extension direction of the second stay wire (400).

18. The post stent graft release device of any one of claims 1 to 4 and 11, wherein: the outer peripheral surface of the near end of the guide seat (100) is a circular truncated cone side surface with the diameter gradually increasing from the near end of the guide seat (100) to the far end of the guide seat (100).

19. The post stent graft release device of any one of claims 1 to 4 and 11, wherein: an X-ray developing material is connected to the first drawing wire (300) and/or the second drawing wire (400).

20. A stent graft implantation system, comprising: comprises an operating handle, a guide wire tube (710), an inner tube (720), an outer tube (730) and the covered stent post-release device of any one of claims 1 to 19; wherein:

the guide wire tube (710) penetrates through the inner tube (720), the guide wire tube (710) penetrates through the second mounting through hole (201), and the proximal end of the guide wire tube (710) is fixed inside the first mounting through hole (101); the proximal end of the inner tube (720) is fixed at the distal end of the stay wire seat (200);

the distal end of the outer tube (730) and the distal end of the inner tube (720) are both connected to the operating handle, and the operating handle is configured to drive the outer tube (730) and the inner tube (720) to move back and forth.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a covered stent post-release device and a covered stent implantation system.

Background

The aortic disease comprises aortic dissection, aortic aneurysm and the like, is mainly caused by hypertension, arteriosclerosis, injury, infection and other reasons, is a cardiovascular disease seriously threatening the health of human beings, and the patients face great life threat; the traditional operation mode for treating the aortic disease is to introduce extracorporeal circulation, perform open type operation and perform artificial blood vessel replacement on the damaged part, but the open type operation has long time, large operation wound and extremely high fatality rate; in recent years, minimally invasive interventions have become popular for treating patients, namely: the covered stent is released to the position of the pathological changes of the blood vessels of a patient through a special delivery system, the aortic dissection and the aortic aneurysm blood vessels are repaired, the pathological changes blood vessels are protected, and the death caused by the rupture of the pathological changes blood vessels is avoided.

Before an operation, the covered stent is required to be arranged in an outer tube of a conveying system, and the conveying system conveys the loaded covered stent to the vascular lesion position of a patient and releases the loaded covered stent so as to achieve the purpose of treatment; generally, a delivery system for delivering a stent graft to a site of a vascular disorder in a patient includes a transporter and a guide wire; the conveyor comprises an operating handle, an outer tube, an inner tube, a guide wire tube and a covered stent post-release device; the wire guide tube penetrates through the inner tube, the inner tube penetrates through the outer tube, the outer tube and the inner tube are both connected to the operating handle, and the rear release device of the covered stent is connected to the near end of the inner tube; when the covered stent is conveyed to a human body, firstly, the covered stent is arranged in the near end of a conveyor, specifically, the covered stent is integrally compressed in an outer tube, a rear fixer fixes the rear end of the covered stent from the inner part of the outer tube, the near end of the covered stent is fixed on a covered stent rear release device, and the covered stent rear release device is used for binding the near end of the covered stent so as to enable the near end of the covered stent to be in a furled state; secondly, leading a guide wire to pass through a guide wire tube, and utilizing a conveyer to carry out percutaneous puncture along the guide wire to convey the covered stent post-release device loaded with the covered stent to the vascular lesion position of a patient; thirdly, the outer tube is withdrawn by using the operating handle, so that the distal end of the covered stent is released from the outer tube, and the covered stent is half released; fourthly, withdrawing the inner tube by using the operating handle so that the post-stent-graft release device releases the proximal end of the stent-graft, thereby releasing the stent-graft completely; fifthly, resetting the outer tube by using an operating handle; and sixthly, withdrawing the conveyor whole and guiding the guide wire backwards.

Disclosure of Invention

The invention aims to provide a post-covered stent release device and a post-covered stent implantation system, which are used for relieving the technical problems that the post-covered stent release device in the prior art is easy to scratch a blood vessel in a narrow and bent blood vessel channel to cause blood vessel damage and even rupture, and causes fatal damage to a patient due to carelessness, and when the proximal end of the covered stent is released by the post-covered stent release device, the proximal end part of the covered stent is released to be sprung outwards at any position, and the blood vessel is greatly damaged in the release process, so that the operation difficulty is high, and the operation success rate is low.

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

in a first aspect, an embodiment of the present invention provides a covered stent post-release device, including a guide holder, a pull wire holder, a first pull wire, a second pull wire, and a locking structure;

the first pull wire and the second pull wire are both made of flexible materials;

the direction extending from the near end of the guide seat to the far end of the guide seat is taken as the axial direction of the guide seat, the direction extending from the near end of the wire pulling seat to the far end of the wire pulling seat is taken as the axial direction of the wire pulling seat, a first mounting through hole penetrating through the guide seat along the axial direction of the guide seat is arranged on the guide seat, and a second mounting through hole penetrating through the wire pulling seat along the axial direction of the wire pulling seat is arranged on the wire pulling seat;

the first stay wire is wound on the outer peripheral surface of the guide seat or the inner peripheral surface of the guide seat, one end of the first stay wire is fixedly connected to the stay wire seat, and the other end of the first stay wire is fixed to the guide seat by the locking structure;

the second pull wires are provided with a plurality of wires, one ends of the second pull wires are fixedly connected to the guide seat, the second pull wires are distributed at intervals in pairs around the radial circumferential surface of the guide seat, the other ends of the second pull wires are used as free ends of the second pull wires, and the free ends of the second pull wires are fixed between the first pull wires and the guide seat; and under the condition that the wire pulling seat moves towards the direction far away from the guide seat, the first pulling wire can be separated from the guide seat, so that the free ends of the second pulling wires are released.

In combination with the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the locking structure includes a spiral groove provided on an outer circumferential surface of the guide holder or an inner circumferential surface of the guide holder, and a notch of the spiral groove is configured to press and fix a first wire disposed inside the spiral groove, so as to press and fix a free end of the second wire between a groove wall of the spiral groove and the first wire.

With reference to the first possible implementation manner of the first aspect, the present invention provides a second possible implementation manner of the first aspect, wherein the locking structure further includes an elastic tube fixed inside the spiral groove, and the first pulling wire is fixed inside the elastic tube by being pressed; or, the elastic tube is fixed inside the spiral groove in a pressing mode, and the first pull wire is fixed inside the elastic tube.

In combination with the second possible implementation manner of the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the elastic tube includes a plurality of segments spaced two by two.

With reference to any one of the first to third possible implementation manners of the first aspect, an example of the present invention provides a fourth possible implementation manner of the first aspect, wherein a depth of the spiral groove is greater than a thickness of the first pulling wire in a direction perpendicular to a length direction of the first pulling wire itself.

In combination with one of the second or third possible embodiments of the first aspect, an example of the invention provides a fifth possible embodiment of the first aspect, wherein the depth of the spiral groove is greater than the diameter of the elastic tube.

With reference to one of the first to the third possible implementation manners of the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein a first wire threading hole is further disposed on the guide seat, one end of the first wire threading hole is communicated with the end surface of the distal end of the guide seat, and the other end of the first wire threading hole is communicated with a portion of the spiral groove, which is close to the distal end of the guide seat.

With reference to the first aspect and one of the first to third possible implementation manners thereof, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, wherein the locking structure includes an elastic locking ring configured to: the end of the first pull wire far away from the pull wire seat can be fixed on the outer peripheral surface of the guide seat in an extruding way, or the end of the first pull wire far away from the pull wire seat can be fixed on the inner peripheral surface of the guide seat in an extruding way.

With reference to the seventh possible implementation manner of the first aspect, an embodiment of the present invention provides an eighth possible implementation manner of the first aspect, wherein a lock ring fixing groove extending in a radial circumferential direction of the guide holder is further provided on an inner circumferential surface of the guide holder or an outer circumferential surface of the guide holder.

In combination with the eighth possible implementation manner of the first aspect, an embodiment of the present invention provides a ninth possible implementation manner of the first aspect, wherein a depth of the shackle groove is greater than a ring body thickness of the elastic shackle.

With reference to the first aspect, an embodiment of the present invention provides a tenth possible implementation manner of the first aspect, wherein the locking structure includes a first pull-cord fixing groove provided on an outer circumferential surface of the guide holder or an inner circumferential surface of the guide holder;

the first pull wire fixing groove comprises a first fixing groove and a second fixing groove; one end of the first fixing groove is connected with one end of the second fixing groove, and the depth of the second fixing groove is greater than that of the first fixing groove;

the first pull wire penetrates through the first fixing groove; an end part of the first pull wire, which is far away from one end of the pull wire seat, is provided with an elastic limiting head, the elastic limiting head is configured to be compressed until the maximum thickness of the elastic limiting head is smaller than the depth of the first fixing groove, and under the condition that the elastic limiting head is not compressed, the maximum thickness of the elastic limiting head is larger than the depth of the first fixing groove;

the notch of the second fixing groove is configured to be capable of limiting the elastic limiting head in the second fixing groove.

With reference to the first aspect and one of the first to third and tenth possible implementation manners of the first aspect, an embodiment of the present invention provides an eleventh possible implementation manner of the first aspect, wherein a ferrule is disposed at a free end of each of the second pull wires, and the first pull wire sequentially passes through the ferrules on the free ends of the second pull wires.

With reference to the first aspect and one of the first to third and tenth possible implementation manners of the first aspect, an embodiment of the present invention provides a twelfth possible implementation manner of the first aspect, wherein a fixing ring is disposed on the wire base, and one end of the first wire is fixedly connected to the wire base by passing through the fixing ring and then knotting.

With reference to the first aspect and one of the first to third and tenth possible implementation manners of the first aspect, an embodiment of the present invention provides a thirteenth possible implementation manner of the first aspect, wherein a plurality of bosses are provided on an outer circumferential surface of the guide seat, and the plurality of bosses are configured to be capable of hooking the hanging ring at the proximal end of the stent graft to the guide seat.

With reference to one of the thirteenth possible implementation manner of the first aspect, an embodiment of the present invention provides a fourteenth possible implementation manner of the first aspect, wherein each of the bosses is provided with a boss through hole, and an opposite end of a free end of the second pull wire is fixedly connected to the boss through hole.

With reference to the first aspect and one of the first to third and tenth possible implementation manners of the first aspect, an embodiment of the present invention provides a fifteenth possible implementation manner of the first aspect, wherein a plurality of second wire limiting grooves are formed in an outer circumferential surface of the guide seat or an inner circumferential surface of the guide seat, the plurality of second wire limiting grooves correspond to the plurality of second wires one to one, and one end of each of the plurality of second wire limiting grooves extends to a distal end surface of the guide seat.

With reference to the fifteenth possible implementation manner of the first aspect, an embodiment of the present invention provides a sixteenth possible implementation manner of the first aspect, wherein a depth of the second wire retaining groove is greater than a thickness of the second wire in a direction perpendicular to a length extension direction of the second wire itself.

With reference to the first aspect and one of the first to third and tenth possible implementation manners of the first aspect, an embodiment of the present invention provides a seventeenth possible implementation manner of the first aspect, wherein an outer circumferential surface of the proximal end of the guide holder is a circular truncated cone side surface with a diameter gradually increasing from the proximal end of the guide holder toward a distal end of the guide holder.

With reference to the first aspect and one of the first to third and tenth possible implementation manners thereof, the present invention provides an eighteenth possible implementation manner of the first aspect, wherein an X-ray developer is connected to the first pull wire and/or the second pull wire.

In a second aspect, embodiments of the present invention provide a stent graft implantation system, which includes an operating handle, a guide wire tube, an inner tube, an outer tube, and a post-stent graft release device provided in one of the foregoing first aspects and any possible implementation manners; wherein: the wire guide pipe penetrates through the inner pipe, penetrates through the second mounting through hole, and is fixed at the near end inside the first mounting through hole; the near end of the inner tube is fixed at the far end of the pull wire seat; the far end of the outer pipe and the far end of the inner pipe are both connected to the operating handle, and the operating handle is configured to drive the outer pipe and the inner pipe to move back and forth.

The embodiment of the invention can realize the following beneficial effects:

in a first aspect, an embodiment of the present invention provides a covered stent post-release device, which includes a guide holder, a pull wire holder, a first pull wire, a second pull wire, and a locking structure.

Wherein: the first pull wire and the second pull wire are both made of flexible materials; the direction of extending from the near end of the self-guide seat to the far end of the guide seat is taken as the axial direction of the guide seat, the direction of extending from the near end of the wire pulling seat to the far end of the wire pulling seat is taken as the axial direction of the wire pulling seat, a first mounting through hole which penetrates through the guide seat along the axial direction of the guide seat is arranged on the guide seat, and a second mounting through hole which penetrates through the wire pulling seat along the axial direction of the wire pulling seat is arranged on the wire pulling seat; the first wire drawing coil is wound on the outer peripheral surface of the guide seat or the inner peripheral surface of the guide seat, one end of the first wire drawing coil is fixedly connected to the wire drawing seat, and the other end of the first wire drawing coil is fixed to the guide seat through the locking structure; the second stay wires are provided with a plurality of second stay wires, one ends of the second stay wires are fixedly connected to the guide seat, the second stay wires are distributed at intervals in pairs around the radial circumferential surface of the guide seat, the other ends of the second stay wires are used as free ends of the second stay wires, and the free ends of the second stay wires are fixed between the first stay wires and the guide seat; and under the condition that the wire pulling seat moves towards the direction far away from the guide seat, the first wire pulling can be separated from the guide seat, so that the free ends of the second wire pulling are released.

In the stent graft fixation and release device provided by the embodiment of the invention, firstly, the first pull wire and the second pull wire which are made of flexible materials do not generate edges and corners during bending, so that the flexibility of the structure which restrains the proximal end of the stent graft fixation and release device can be ensured, the scraping injury to blood vessels can be greatly reduced during operation, and on the basis, operation matters such as but not limited to the fact that the second pull wire passing through the position of a hanging ring at the proximal end of the stent graft is longer are taken into consideration, so that the constrained deformation of the stent graft is smaller when the outer tube is withdrawn to half-release the stent graft; therefore, when the covered stent is completely released, the releasing force of the covered stent is not so large, the buffering effect can be achieved, the blood vessel is further protected, and even the blood vessel is not scratched, so that the damage to the blood vessel in the operation process is greatly reduced; secondly, in the prior art, before withdrawing the conveyor body and guiding the guide wire backwards, the outer tube needs to be reset by using the operating handle of the conveyor so as to prevent the edges and corners of the rigid structure at the front end of the stent graft from damaging blood vessels continuously when withdrawing, and the operation consumes a certain operation time; in addition, the fixed release device of tectorial membrane support that this embodiment provided overall structure is simple, the installation adjustment of being convenient for, and then has improved preoperative surgical instruments's preparation and debugging efficiency. In addition, because in the embodiment, when the stent graft is completely released, the stent graft is gradually and slowly released in a mode of pulling the first pull wire backwards, and the first pull wire is wound on the outer circumferential surface of the guide seat or the inner circumferential surface of the guide seat, that is, in the releasing process, each hanging ring on the stent graft is relatively independent, and two adjacent hanging rings are sequentially and slowly released, the impact of each releasing on the blood vessel is small, and the whole releasing process is safer.

To sum up, the embodiment of the invention at least relieves the technical problems that the structure of the fixed release device of the covered stent for binding the proximal end of the covered stent in the prior art is mostly a hard metal wire or a rigid metal fork-shaped structure, the blood vessel is easily scratched in a narrow and bent blood vessel channel to cause blood vessel damage or even rupture, the blood vessel damage or even rupture is careless, and fatal damage is caused to a patient; meanwhile, the operation efficiency is improved, and the preparation and debugging efficiency of the preoperative surgical instrument is improved.

In a second aspect, an embodiment of the present invention provides a stent graft implantation system, which includes an operating handle, a guide wire tube, an inner tube, an outer tube, and the stent graft post-release device provided in the first aspect; wherein: the wire guide pipe penetrates through the inner pipe, the wire guide pipe penetrates through the second mounting through hole, and the near end of the wire guide pipe is fixed inside the first mounting through hole; the near end of the inner tube is fixed at the far end of the stay wire seat; the far end of the outer pipe and the far end of the inner pipe are both connected to an operating handle, and the operating handle is configured to drive the outer pipe and the inner pipe to move back and forth; because the stent graft implantation system provided by the embodiment of the invention comprises the post-stent graft release device provided by the first aspect, the stent graft implantation system provided by the embodiment of the invention can achieve all the beneficial effects that the post-stent graft release device provided by the first aspect can achieve.

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 overall structure diagram of a stent graft post-release device according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is an exploded view of the overall structure of a post stent graft release device according to an embodiment of the present invention;

FIG. 4 is a schematic view of an overall structure of a fixing seat in a guide seat according to an embodiment of the present invention;

FIG. 5 is a schematic view of an overall structure of a fixing seat in a lower guide seat according to another view angle in the embodiment of the present invention;

FIG. 6 is a schematic view of an assembly structure of the first pulling wire, the second pulling wire and the guide holder fixing seat in the embodiment of the present invention;

FIG. 7 is a schematic view of an assembly structure of the first pulling wire, the second pulling wire and the guide holder fixing seat at another view angle in the embodiment of the present invention;

FIG. 8 is a sectional view taken along line B-B of FIG. 7;

FIG. 9 is a schematic view of the overall structure of the wire pulling seat in the embodiment of the present invention;

FIG. 10 is an assembly view of a stent graft post-release device with an inner tube, a post-anchor and a guidewire tube in a stent graft implantation system according to an embodiment of the present invention;

FIG. 11 is an exploded view of the assembly of the stent graft post-release device with the inner tube, the outer tube, the post-anchor, and the guidewire tube in a stent graft implantation system according to embodiments of the present invention;

FIG. 12 is a schematic view of the entire structure of the fixing seat of the guide holder in the second alternative embodiment of the locking structure in the embodiment of the present invention;

fig. 13 is a schematic overall structural view of the fixing seat of the guide holder in the third alternative embodiment of the locking structure in the embodiment of the present invention.

Icon: 100-a guide seat; 111-a fixed seat; 112-a guide head; 101-a first mounting through hole; 110-a first pull wire threading hole; 120-a catch-securing slot; 130-a boss; 1301-perforating a boss; 140-a second wire-drawing limiting groove; 150-connecting hole; 200-a wire pulling seat; 201-a second mounting through hole; 210-a fixed ring; 300-a first pull line; 310-an elastic stopper; 400-a second pull line; 410-a ferrule; 510-a spiral groove; 520-an elastic tube; 530-elastic locking ring; 540-first guy wire securing groove; 541-a first fixing groove; 542-a second fixation groove; 600-covered stent; 710-a guidewire tube; 7100-a linker; 720-inner tube; 730-outer tube; 740 — rear holder.

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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope 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 "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally laid out when products of the present invention are used, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred devices or elements 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," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather 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.