CN115869105A

CN115869105A - Lumen stent

Info

Publication number: CN115869105A
Application number: CN202110973223.6A
Authority: CN
Inventors: 唐春炜
Original assignee: Lifetech Scientific Shenzhen Co Ltd
Current assignee: Lifetech Scientific Shenzhen Co Ltd
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2023-03-31
Also published as: WO2023025045A1

Abstract

The invention discloses a pipe cavity bracket, which comprises a tubular main body and a half-releasing device connected to the tubular main body, wherein the half-releasing device comprises a binding line and at least 2 limiting rods, the binding line is arranged on the tubular main body and is provided with a locking part, the at least 2 limiting rods are mutually limited at intervals along the circumferential direction of the tubular main body and are used for being detachably connected with the locking part, and when the limiting rods are connected with the locking part, the locking part is limited on the limiting rods along the radial direction of the limiting rods and leads the binding line to be circumferentially bound on the tubular main body. The invention has the beneficial effects that: the at least 2 limiting rods which are limited on the tubular main body at intervals along the circumferential direction of the tubular main body are utilized to release the positions, needing to be released, of the tubular main body bound by the binding lines step by step in a mode of being disengaged from the locking parts one by one, so that the controllability of the releasing operation of the lumen stent and the releasing positioning precision are improved.

Description

Lumen stent

Technical Field

The invention relates to the technical field of interventional medical instruments, in particular to a lumen stent.

Background

In more than ten years, aorta covered stent endoluminal isolation has been widely applied to lesions such as thoracic and abdominal aortic aneurysms and arterial dissections, has definite curative effect, small wound, quick recovery and few complications, and becomes a first-line treatment method. During operation, under the X-ray fluoroscopy monitoring, the covered stent is conveyed to the pathological change position through the corresponding conveying system, the covered stent isolates blood flow from the pathological change position, and the influence of blood pressure on the pathological change position is eliminated, so that the purpose of curing is achieved.

In order to solve the problem of positioning the stent graft in vivo, development marks are usually made at the key positions of the stent graft, and the development marks are used for positioning the stent graft in the axial direction and the circumferential direction. However, when the stent graft is compressed in the delivery sheath, the stent graft has compression wrinkles in the circumferential direction and is in an extended state in the axial direction, and when the stent graft is positioned by the development marker in this case, there is a large deviation in the circumferential direction and the axial direction. Therefore, in the prior art, the stent graft is radially constrained by the constrained wire harness, so that the stent graft is in a semi-released state. When the covered stent is in a semi-release state, the outer diameter of the covered stent is larger than that when the covered stent is loaded in the conveyor, and the outer diameter of the covered stent is smaller than that when the covered stent is completely released and anchored in a human body lumen. Compared with the position of the tectorial membrane stent positioned by the developing structure in the state of loading the tectorial membrane stent into the conveyor, the outer diameter of the tectorial membrane stent in the semi-release state is closer to the outer diameter of the tectorial membrane stent in the complete release state, and the positioning by the developing structure is more accurate.

However, in the axial and circumferential positioning processes of the luminal stent, controllability is poor, the positioning accuracy meets a bottleneck, and the stability of the luminal stent in the deployment process needs to be improved.

Disclosure of Invention

The present invention is directed to a lumen stent, which solves the above-mentioned drawbacks of the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows:

there is provided a lumen stent comprising a tubular body and a half release device connected to the tubular body, the half release device comprising a leash line provided on the tubular body and at least 2 stopper rods, the leash line having a locking part, the at least 2 stopper rods being spaced apart from each other in a circumferential direction of the tubular body and being adapted to be detachably connected to the locking part, wherein, when the stopper rod is connected to the locking part, the locking part is restrained to the stopper rod in a radial direction of the stopper rod and causes the leash line to circumferentially restrain the tubular body.

In conclusion, the lumen stent provided by the invention has the following beneficial effects: according to the lumen stent releasing device, at least 2 limiting rods are arranged, and the limiting rods are limited on the tubular main body at intervals along the circumferential direction of the tubular main body, so that when the limiting rods are released from being matched with the locking parts one by one, the positions, needing to be released, of the tubular main body bound by the binding lines can be released step by step, and the controllability and the releasing and positioning accuracy of the lumen stent releasing operation are improved.

In some embodiments, the leash line is connected to the tubular body and folded in half to form a first strand and a second strand, the leash line folded in half position forms the locking portion, and the at least 2 restraining bars are disposed between the first strand and the second strand.

Wherein in some embodiments one of the at least 2 arresting bars is arrested by the leash line at a connection location of the leash line to the tubular body in a direction opposite to the direction in which the leash line encircles the tubular body.

In some embodiments, the leash line has a fixing portion and at least 2 locking portions, the fixing portion is fixedly connected with the tubular body, the at least 2 locking portions are spaced apart from each other and located on the same side or different sides of the fixing portion, and the at least 2 limiting rods are respectively and correspondingly inserted through the at least 2 locking portions.

In some embodiments, the restraining wire has a fixing portion fixedly connected to the tubular body and a wire loop, the locking portion is formed at an end portion of the wire loop far from the fixing portion, and 2 or more than 2 of the restraining rods are inserted through the wire loop.

In some embodiments, the leash line has at least 2 of the wire loops, the at least 2 of the wire loops being spaced apart from each other on the same side or different sides of the anchor portion.

In some embodiments, the tubular main body is fixedly connected with a plurality of latches, and the at least 2 limiting rods respectively penetrate through the plurality of latches in an axial direction of the limiting rods.

In some embodiments, a binding channel is arranged on the tubular main body, the central angle of the binding channel is smaller than 360 degrees, an opening is formed in the position of the binding channel corresponding to the limiting rod, the opening is communicated with the inner cavity of the binding channel, the binding line is arranged in the binding channel in a penetrating manner, and the locking part is used for being connected with the corresponding limiting rod at the opening.

In some embodiments, the tubular body includes a wave-shaped ring, in an axial section of the wave-shaped ring, the tubular body has at least 2 binding channels arranged at intervals corresponding to the wave-shaped ring, and binding lines in the at least 2 binding channels are respectively used for applying radial binding force to one side and the other side of a median coil of the wave-shaped ring.

In some embodiments, the wavy ring includes a plurality of peaks, a plurality of valleys, and a plurality of connecting rods respectively connecting adjacent peaks and valleys, the wavy ring further includes a first region and a second region spaced apart from each other in an axial direction and surrounding a peripheral side thereof, the first region has a width extending from the peak to the valley by 2/5 times of a height in the axial direction, the second region has a width extending from the valley to the peak by 2/5 times of a height in the axial direction, at least 1 of the at least 2 binding channels is located in the first region, and at least 1 of the at least 2 binding channels is located in the second region.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic structural view of a luminal stent of an embodiment;

FIG. 2 is a schematic structural view of the luminal stent shown in FIG. 1, after the first stop lever is disengaged from the locking part, the luminal stent is partially released;

FIG. 3 is a schematic structural view of another embodiment of a luminal stent;

FIG. 4 is an enlarged view of a portion of the structure shown in FIG. 3 at the circle;

FIG. 5 is a schematic structural view of another embodiment of a luminal stent;

FIG. 6 is a schematic structural view of yet another embodiment of a luminal stent;

FIG. 7 is a schematic structural view of a luminal stent of yet another embodiment;

FIG. 8 is a schematic structural view of a luminal stent of yet another embodiment;

FIG. 9 is a schematic structural view of yet another embodiment of a luminal stent;

FIG. 10 is a schematic structural view of yet another embodiment of a luminal stent;

FIG. 11 is a schematic structural view of a luminal stent of yet another embodiment;

FIG. 12 is a schematic structural view of a luminal stent of yet another embodiment;

FIG. 13 is a partial schematic view of a constraining channel corresponding to the constraining of the undulating rings in one embodiment of a luminal stent.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms than those specifically described herein, and it will be apparent to those skilled in the art that many more modifications are possible without departing from the spirit and scope of the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that the lumen stent is defined to have a proximal end at the end closer to the heart and a distal end at the end farther from the heart after release.

Referring to fig. 1, one embodiment of the present application provides a lumen stent comprising a tubular body 10 and a semi-release device 20 attached to the tubular body 10 for radially constraining the tubular body 10.

The semi-releasing means 20 comprises at least 2 arresting bars 21 and a leash line 22 provided on the tubular body 10. The binding line 22 has locking portions 22a, and at least 2 of the limiting rods 21 are spaced from each other along the circumference of the tubular body 10 and are limited to the tubular body 10, that is, the limiting rods 21 are spaced from each other along the circumference of the tubular body 10, and meanwhile, each limiting rod 21 is limited to the tubular body 10 and cannot move relative to the tubular body 10 along the circumference of the tubular body 10, so that when the limiting rods 21 are connected to the locking portions 22a, the tubular body 10 can be bound circumferentially by the binding line 22, and specifically, when the limiting rods 21 are connected to the locking portions 22a, the locking portions 22a are limited to the limiting rods 21 along the radial direction of the limiting rods 21 and the binding line 22 is bound to the tubular body 10 circumferentially. It should be noted that the spacing rod 21 and the locking part 22a are detachably connected, so that when the spacing rod 21 is separated from the locking part 22a, the force of the spacing rod 21 pulling the binding line 22 through the locking part 22a to bind the tubular body 10 can be released, so that the part of the tubular body 10 is released. And because the semi-releasing device 20 comprises at least 2 limiting rods 21, when different limiting rods 21 are released respectively in sequence, the bound positions of the tubular main body 10 can be released step by step, so that the controllability of the releasing operation and the releasing positioning precision are improved. Compared with the prior art, when the bound position of the tubular main body 10 is released step by step, one of at least 2 limiting rods 21 can be released first, so that the constraint line 22 is released from binding a part of the tubular main body 10, the size of the tubular main body 10 is closer to the size anchored in the blood vessel, and the tubular main body is more accurate in positioning.

The binder line 22 is connected to the tubular body 10 and folded in half to form a first strand 221 and a second strand 222, the folded position of the binder line 22 forms a locking portion 22a, and at least 2 stopper rods 21 are inserted between the first strand 221 and the second strand 222.

Taking the half-releasing device 20 shown in fig. 1 as an example including 3 limiting rods 21, for convenience of description, the 3 limiting rods 21 are respectively referred to as "a first limiting rod 21'", "a second limiting rod 21" "and" a third limiting rod 21' ", and the first limiting rod 21', the second limiting rod 21" and the third limiting rod 21' "are respectively limited to the tubular body 10 along the circumferential direction of the tubular body 10 at intervals. The first stopper rod 21', the second stopper rod 21 "and the third stopper rod 21'" are all inserted between the first strand 221 and the second strand 222, such that when the first stopper rod 21' is released near the locking portion 22a, the portion of the tubular body 10 is expanded without being bound by the binding line 22, i.e. the portion of the tubular body 10 is released until the locking portion 22a is engaged with the second stopper rod 21 "(see fig. 2), at which time the binding line 22 is maintained in a relaxed state by the tubular body 10 under the constraint of the second stopper rod 21", and at the same time, the tubular body 10 does not continue to expand under the constraint of the binding line 22, i.e. the tubular body 10 is still in a partially circumferentially bound state. Since a part of the structure of the tubular body 10 is unfolded without circumferential binding of the binding line 22 after the first stopper rod 21' is separated from the locking part 22a, the unfolded part has good stability. Accordingly, upon releasing the third stopper rod 21"' cooperating with the locking portion 22a, the tubular body 10 will expand such that the locking portion 22a cooperates with the third stopper rod 21" ', at which point the leash line 22 is held in a relaxed state by the tubular body 10 under the constraint of the third stopper rod 21"', while the tubular body 10 does not continue to expand under the constraint of the leash line 22, i.e. the tubular body 10 is still in a partially circumferentially restrained state.

In the above embodiment, by gradually releasing the limiting rods 2122 (such as the first limiting rod 21', the second limiting rod 21", and the third limiting rod 21"') matched with the locking portions 22a, after sequentially releasing the matching between the first limiting rod 21', the second limiting rod 21", and the third limiting rod 21"' and the locking portions 22a, the tubular body 10 is completely expanded, and the release is completed. The luminal stent of the present invention can satisfy the need of step-by-step release of the local part of the tubular main body 10, so that the controllability of the release operation is good, and thus the positioning accuracy can be improved when moving the tubular main body 10 to the position to be implanted.

Furthermore, in some embodiments, as shown in connection with fig. 3, the branch window 105 is disposed in a portion between the first stopper rod 21' and the second stopper rod 21 ″. Since this portion can be released by the engagement of the first stopper rod 21' with the locking portion 22a, i.e., is no longer restrained by the leash line 22 and is in a relaxed state, there is good stability. Specifically, after the first stopper rod 21' is separated from the locking portion 22a, the second stopper rod 21 ″ can continue to hold the tether line 22 in a state of partially circumferentially constraining the tubular body 10, so that the position of the tubular body 10 is subsequently adjusted to position the branch window 105, thereby improving the positioning accuracy of the branch window 105.

It should be noted that, in other embodiments, the component to be positioned is not limited to the branch window 105, and may also be other components with higher positioning requirements, such as branches or keels, which are disposed at a position between the two limiting rods 21 corresponding to the tubular main body 10, so that the accuracy of the release position can be improved by the step release manner described above.

In the embodiment in which at least 2 limiting rods 21 are spaced from each other along the circumference of the tubular body 10, the limiting rods 21 may be limited circumferentially relative to the tubular body 10 by using a positioning structure, or by using the aforementioned binding lines 22 to limit the limiting rods 21 circumferentially relative to the tubular body 10 at the connection positions of the first strand 221 and the second strand 222 with the tubular body 10.

For example, as shown in fig. 3 and 4, a lock 104 is fixedly connected to the tubular body 10, and the lock 104 is used for passing any one of at least 2 limiting rods 21.

The tubular main body 10 is fixedly connected with a plurality of lock catches 104, the number of the lock catches 104 is equal to the number of the limiting rods 21, and the limiting rods 21 are respectively and correspondingly limited on the tubular main body 10 by the lock catches 104 along the circumferential direction of the tubular main body 10.

In some embodiments, a plurality of locking catches 104 are fixedly connected to the tubular main body 10, and at least 2 limiting rods 21 are respectively and movably disposed through the plurality of locking catches 104 along their own axial directions.

In other embodiments, one of the at least 2 restraining rods 21 is restrained by the leash line 22 at a connection position of the leash line 22 and the tubular body 10 in a direction opposite to an extending direction of the leash line 22 and the tubular body 10 along the circumferential side of the tubular body 10, and the plurality of buckles 104 correspondingly restrain the other restraining rods 21 to the tubular body 10 along the circumferential direction of the tubular body 10.

Taking the lumen stent shown in fig. 3 and 4 as an example, the number of the limiting rods 21 is 2, which are respectively a first limiting rod 21 'and a second limiting rod 21", the first limiting rod 21' is bound to the connecting position of the first strand 221 and the second strand 222 of the binding line 22 and the tubular body 10 by the binding line 22 in the opposite direction of the extending direction of the tubular body 10 of the binding line 22 along the circumferential side of the tubular body 10, and the lock 104 correspondingly limits the second limiting rod 21" to the tubular body 10 along the circumferential direction of the tubular body 10.

As shown in fig. 5 and 6, the leash line 22 has a fixing portion 22b and at least 2 locking portions 22a, the fixing portion 22b is fixedly connected with the tubular main body 10, and at least 2 limiting rods 21 respectively penetrate through the at least 2 locking portions 22a, so that after the corresponding limiting rods 21 are disengaged from the locking portions 22a, the leash line 22 correspondingly disengages the local restraint on the tubular main body 10, so that the limiting rods 21 at different positions are sequentially withdrawn, and the effect of releasing the tubular main body 10 step by step can be achieved.

It should be noted that in the embodiment where the leash line 22 has at least 2 locking parts 22a, the locking parts 22a may be located on the same side or different sides with respect to the fixing part 22 b. For example, taking the instance that the leash line 22 includes 2 locking parts 22a, as shown in fig. 5, the 2 locking parts 22a are located at intervals on the same side of the fixing part 22b, or, as shown in fig. 6, the 2 locking parts 22a are located at intervals on different sides of the fixing part 22 b.

In some embodiments, as shown in fig. 7, the restraining wire 22 has a fixing portion 22b and a wire ring 22c, the fixing portion 22b is fixedly connected to the tubular main body 10, an end portion of the wire ring 22c far from the fixing portion 22b is formed with a locking portion 22a,2 or more than 2 limiting rods 21 are inserted into the wire ring 22c, so that after the limiting rod 21 matched with the locking portion 22a is pulled out, the tubular main body 10 is expanded to make the locking portion 22a of the wire ring 22c matched with the adjacent limiting rod 21, and so on, the limiting rods 21 matched with the locking portion 22a are pulled out in sequence, thereby realizing the stepwise release of the tubular main body 10, and improving the controllability of the releasing operation and the releasing accuracy.

Further, as shown in fig. 8 and 9, the tether line 22 has at least 2 wire loops 22c, and the at least 2 wire loops 22c are spaced apart from each other on different sides (see fig. 8) or on the same side (see fig. 9) of the anchor portion 22 b.

Referring to fig. 10, a binding passage 24 is provided on the tubular main body 10, a central angle corresponding to the binding passage 24 is smaller than 360 °, an opening 24a is formed at a position of the binding passage 24 corresponding to the restraint rod 21, the opening 24a is communicated with an inner cavity of the binding passage 24, the binding line 22 is inserted into the binding passage 24, and the locking portion 22a is used for connecting with the corresponding restraint rod 21 at the opening 24 a.

It should be noted that there are many possibilities for the structure of the tethering channel 24, for example, as shown in fig. 10 and 11, the lumen stent includes a covering film 102 capable of isolating blood flow, a covering 103 is provided on the outer surface of the covering film 102, and the tethering channel 24 is formed between the covering 103 and the covering film 102; alternatively, as shown in fig. 1 to 3, a plurality of limit buckles 223 are provided on the tubular body 10, the restraint passage 24 is formed by the plurality of limit buckles 223, and the restraint line 22 is penetrated through the limit buckles 223.

As shown in fig. 12 and 13, the tubular body 10 includes a wave-shaped ring 101, and the wave-shaped ring 101 is made of a material with good biocompatibility, such as nickel titanium, stainless steel, etc. In some embodiments, the plurality of undulating rings 101 are arranged sequentially, preferably in parallel spaced apart arrangement, from the proximal end to the distal end along the axial direction of the tubular body 10.

The wavy ring 101 includes a plurality of peaks 101a, a plurality of valleys 101b, and a plurality of tie bars 101c connecting adjacent peaks 101a and valleys 101b, respectively. The wavy ring 101 has a closed cylindrical structure, and the multiple circles of the wavy ring 101 may have the same or similar wavy shapes, it is understood that the present embodiment is not limited to the specific structure of the wavy ring 101, the waveforms of the wavy ring 101 may be set according to the requirement, and the number of the waveforms and the heights of the waveforms in each circle of the wavy ring 101 may be set according to the requirement.

The multi-turn corrugated ring 101 is connected with a covering film 102, and the covering film 102 is made of a polymer material with good biocompatibility, such as PTFE (polytetrafluoroethylene), FEP (Fluorinated ethylene propylene), PET (Polyethylene terephthalate), and the like.

In some embodiments, as shown in fig. 12 and 13, in the axial section of the wavy ring 101, at least 2 binding passages 24 are formed on the tubular body 10 at intervals corresponding to the wavy ring 101, and the binding lines 22 in the at least 2 binding passages 24 are respectively used for applying radial binding force to one side and the other side of the median coil of the wavy ring 101. The middle coil is an annular coil formed by connecting the midpoints of the connecting rods 101c of the corrugated ring 101 in sequence along the circumferential side of the tubular body 10. Through this kind of structural setting, wave crest 101a and trough 101b of wave form ring-shaped object 101 are by even constraint to avoid crest 101a and trough 101b atress uneven and lead to partial side, arouse crest 101a or trough 101b perk then and with the anchoring of vascular wall or contact frictional force great, influence the adjustment of lumen support's axial and circumferential position.

As shown in fig. 12 and fig. 13, the wavy annular object 101 further includes a first area A1 and a second area A2 spaced apart from each other along the axial direction and surrounding the first area A1, wherein a width D1 of the first area A1 is 2/5 times of the wave height from the peak 101a as a starting point and extends along the axial direction toward the valley 101b, that is, two sides b1 and b2 defining the width D1 of the first area A1 surround the corresponding peak 101a of the wavy annular object 101, and a vertical distance from the peak 101a is 2/5 times of the wave height. The width D2 of the second area A2 is 2/5 times of the wave height extending from the trough 101b to the crest 101a along the axial direction, that is, two sides b3, b4 defining the width D2 of the second area A2 respectively surround the corresponding trough 101b of the wavy ring 101, and the vertical distance from the trough 101b is 2/5 times of the wave height. It should be noted that the wave height refers to a perpendicular distance from the wave crest 101a to the wave trough 101b along the axial direction of the wavy ring 101.

At least 1 of the at least 2 tethering channels 24 is located within the first area A1 and at least 1 of the at least 2 tethering channels 24 is located within the second area A2. The binding lines 22 in the binding passage 24 respectively and correspondingly bind the positions of the first region A1 and the second region A2 of the wavy ring 101, so that the peak 101a and the valley 101b of the wavy ring 101 are uniformly stressed to improve the stability of the tubular body 10 and prevent the peak 101a or the valley 101b from tilting.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A lumen stent comprising a tubular body and a half release device connected to the tubular body, wherein the half release device comprises a leash line and at least 2 stop rods, the leash line is provided with a locking part, the at least 2 stop rods are limited to the tubular body at intervals along the circumferential direction of the tubular body and are used for being detachably connected with the locking part, and when the stop rods are connected with the locking part, the locking part is limited to the stop rods along the radial direction of the stop rods and leads the leash line to circumferentially restrict the tubular body.

2. The luminal stent of claim 1 wherein the leash line is connected with the tubular body and doubled back to form a first strand and a second strand, the leash line doubled back position forming the locking portion, the at least 2 stop bars being disposed between the first strand and the second strand.

3. A luminal stent according to claim 2 wherein one of the at least 2 arresting bars is arrested by the leash line at the point of connection of the leash line to the tubular body in a direction opposite to the direction in which the leash line encircles the tubular body.

4. The luminal stent according to claim 1, wherein the restraining line has a fixing portion and at least 2 locking portions, the fixing portion is fixedly connected with the tubular body, the at least 2 locking portions are located at the same side or different sides of the fixing portion at intervals, and the at least 2 limiting rods are respectively correspondingly penetrated through the at least 2 locking portions.

5. The luminal stent as defined in claim 1, wherein the restraining wire has a fixing portion fixedly connected with the tubular body and a wire loop, wherein the end position of the wire loop far away from the fixing portion forms the locking portion, and 2 or more than 2 of the restraining rods are inserted through the wire loop.

6. The luminal stent of claim 5 wherein the restraining line has at least 2 of the wire loops, the at least 2 of the wire loops being spaced apart from each other on the same or different sides of the securement portion.

7. The luminal stent as defined in any one of claims 1 to 6 wherein a plurality of catches are fixedly connected to the tubular body, and the at least 2 stop bars are movably disposed through the plurality of catches along their own axial directions, respectively.

8. The luminal stent as claimed in claim 1, wherein the tubular main body is provided with a binding channel, the central angle of the binding channel corresponding to is less than 360 °, the binding channel is formed with an opening corresponding to the position of the stop bar, the opening is communicated with the inner cavity of the binding channel, the binding line is arranged in the binding channel in a penetrating way, and the locking part is used for connecting with the corresponding stop bar at the opening.

9. The luminal stent as defined in claim 8, wherein the tubular body comprises a wave-shaped ring, and at least 2 of the constraining channels are arranged on the tubular body at intervals in the axial interval of the wave-shaped ring and correspond to the wave-shaped ring, and the constraining lines in the at least 2 of the constraining channels are respectively used for applying radial constraining force to one side and the other side of the median coil of the wave-shaped ring.

10. The luminal stent as defined in claim 9, wherein the wavy annulus comprises a plurality of peaks, a plurality of valleys and a plurality of connecting rods connecting adjacent peaks and valleys, respectively, the wavy annulus further comprising first and second regions axially spaced apart and opposing along the wavy annulus and circumferentially surrounding the wavy annulus, the first region having a width extending axially from the peak to the valley by a factor of 2/5 of the wave height, the second region having a width extending axially from the valley to the peak by a factor of 2/5 of the wave height, at least 1 of the at least 2 constraining channels being located in the first region, and at least 1 of the at least 2 constraining channels being located in the second region.