Luminal stent

Abstract

The present invention discloses a tubular stent, comprising a tubular body and a semi-release device connected to the tubular body, the semi-release device comprising a restraining line provided on the tubular body and at least two limiting rods, the restraining line having a locking portion, the at least two limiting rods being spaced apart from each other along the circumference of the tubular body and being used for being detachably connected to the locking portion, wherein when the limiting rod is connected to the locking portion, the locking portion is radially limited to the limiting rod and causes the restraining line to circumferentially restrain the tubular body. The beneficial effect of the present invention is that by utilizing at least two limiting rods spaced apart from each other along the circumference of the tubular body, the positions of the tubular body that need to be released that are restrained by the restraining line are released step by step in a manner of disengaging from the locking portion one by one, thereby improving the controllability of the release operation of the tubular stent and the release positioning accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of interventional medical devices, and in particular to a lumen stent. Background Art

[0002] Over the past decade, endovascular exclusion with aortic stent grafts has been widely used for thoracic and abdominal aortic aneurysms and dissections. Its proven efficacy, minimal invasiveness, rapid recovery, and minimal complications have made it a first-line treatment. During the procedure, under X-ray fluoroscopy, the stent graft is delivered to the lesion via a delivery system. The stent graft isolates blood flow from the lesion, eliminating the effects of blood pressure on the lesion and ultimately achieving a cure.

[0003] In order to solve the positioning problem of the coated stent in the body, development marks are usually made at key positions of the stent, and the development marks are used to position the coated stent in the axial and circumferential directions. However, when the coated stent is compressed in the delivery sheath, it has compression wrinkles in the circumferential direction and is in an elongated state in the axial direction. If it is positioned by development marks at this time, there will be large circumferential and axial deviations. Therefore, in the prior art, the coated stent is radially constrained by a binding harness, so that the coated stent is in a semi-released state. When the coated stent is in the semi-released state, its outer diameter is larger than the outer diameter when loaded in the conveyor, and the outer diameter is smaller than the outer diameter of the coated stent when it is fully released and anchored in the human body's lumen. Compared with positioning the position of the coated stent by a development structure when the coated stent is loaded in the conveyor, the outer diameter of the coated stent when it is in the semi-released state is closer to the outer diameter when it is fully released, and positioning by the development structure will also be more accurate.

[0004] However, the controllability of the axial and circumferential positioning of the luminal stent is poor, the positioning accuracy has reached a bottleneck, and the stability of the luminal stent deployment process needs to be improved urgently. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a luminal stent in view of the above-mentioned defects of the prior art.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A tubular cavity stent is provided, comprising a tubular body and a semi-release device connected to the tubular body, the semi-release device comprising a restraining line arranged on the tubular body and at least two limiting rods, the restraining line having a locking portion, the at least two limiting rods being limited to the tubular body at intervals along the circumference of the tubular body, and being used for being detachably connected to the locking portion, wherein, when the limiting rod is connected to the locking portion, the locking portion is limited to the limiting rod along the radial direction of the limiting rod and causes the restraining line to circumferentially restrain the tubular body.

[0008] In summary, a tubular stent implementing the present invention has the following beneficial effects: the present application sets at least two limit rods, and makes these limit rods limit the tubular body at intervals along the circumference of the tubular body, so that when these limit rods are released one by one from the locking part, the positions of the tubular body that need to be released and are bounded by the restraining line can be released in steps, thereby improving the controllability of the release operation of the tubular stent and the release positioning accuracy.

[0009] In some embodiments, the restraining line is connected to the tubular body and folded in half to form a first wire bundle and a second wire bundle, the folded position of the restraining line forms the locking portion, and the at least two limiting rods are arranged between the first wire bundle and the second wire bundle.

[0010] In some embodiments, one of the at least two limiting rods is constrained by the constraining wire at a connection position between the constraining wire and the tubular body in a direction opposite to a direction in which the constraining wire surrounds the tubular body.

[0011] In some embodiments, the restraint line has a fixing portion and at least two locking portions, the fixing portion is fixedly connected to the tubular body, the at least two locking portions are spaced apart from each other and are located on the same side or different sides of the fixing portion, and the at least two limiting rods are respectively and correspondingly arranged through the at least two locking portions.

[0012] In some embodiments, the restraining line has a fixing portion and a wire loop, the fixing portion is fixedly connected to the tubular body, the end position of the wire loop away from the fixing portion forms the locking portion, and two or more limiting rods are passed through the wire loop.

[0013] In some embodiments, the restraining wire has at least two wire loops, and the at least two wire loops are located on the same side or different sides of the fixing portion at intervals from each other.

[0014] In some embodiments, a plurality of lock buckles are fixedly connected to the tubular body, and the at least two limiting rods are movably provided along their own axial directions through the plurality of lock buckles.

[0015] In some embodiments, a restraining channel is provided on the tubular body, the central angle corresponding to the restraining channel is less than 360°, an opening is formed in the restraining channel corresponding to the position of the limiting rod, the opening is connected to the inner cavity of the restraining channel, the restraining line is passed through the restraining channel, and the locking portion is used to connect with the corresponding limiting rod at the opening.

[0016] In some embodiments, the tubular body includes a corrugated ring. Within the axial interval where the corrugated ring is located, the tubular body has at least two constraining channels spaced apart and corresponding to the corrugated ring. The constraining lines in the at least two constraining channels are respectively used to apply radial restraint forces to one side and the other side of the mid-position coil of the corrugated ring.

[0017] In some embodiments, the wavy ring includes a plurality of crests, a plurality of troughs, and a plurality of connecting rods respectively connecting adjacent crests and troughs. The wavy ring also includes a first region and a second region that are spaced apart from each other along the axial direction and surround the circumference thereof. The width of the first region is 2 / 5 times the wave height extending axially from the crest to the trough. The width of the second region is 2 / 5 times the wave height extending axially from the trough to the crest. At least one of the at least two restraining channels is located within the first region, and at least one of the at least two restraining channels is located within the second region. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 This is a schematic structural diagram of a luminal stent according to an embodiment;

[0020] Figure 2 yes Figure 1 The structure diagram of the luminal stent shown is a schematic diagram of the luminal stent when the cooperation between the first limiting rod and the locking portion is released so that the luminal stent is partially released;

[0021] Figure 3 This is a schematic structural diagram of a luminal stent according to another embodiment;

[0022] Figure 4 yes Figure 3 The enlarged schematic diagram of the local structure of the circle of the luminal stent is shown;

[0023] Figure 5 is a schematic structural diagram of another embodiment of the luminal stent;

[0024] Figure 6 is a schematic structural diagram of yet another embodiment of a luminal stent;

[0025] Figure 7 This is a schematic structural diagram of a luminal stent according to yet another embodiment;

[0026] Figure 8 This is a schematic structural diagram of a luminal stent according to another embodiment;

[0027] Figure 9 This is a schematic structural diagram of another embodiment of a luminal stent;

[0028] Figure 10 It is a structural schematic diagram of another embodiment of a luminal stent;

[0029] Figure 11 This is a schematic structural diagram of a luminal stent according to another embodiment;

[0030] Figure 12 This is a schematic structural diagram of a luminal stent according to yet another embodiment;

[0031] Figure 13 FIG. 1 is a schematic diagram of a local structure of a luminal stent in an embodiment in which a binding channel corresponds to a binding of a wavy ring. DETAILED DESCRIPTION

[0032] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] It should be noted that, after release, the end of the luminal stent closest to the heart is defined as the proximal end, and the end farthest from the heart is defined as the distal end.

[0036] See Figure 1 As shown, one embodiment of the present application provides a luminal stent, comprising a tubular body 10 and a semi-release device 20 connected to the tubular body 10 and radially constraining the tubular body 10 .

[0037] The semi-release device 20 includes at least two limiting rods 21 and a restraining line 22 provided on the tubular body 10. The restraining line 22 has a locking portion 22a. The at least two limiting rods 21 are spaced apart from each other along the circumference of the tubular body 10 and are restrained in the tubular body 10. That is, these limiting rods 21 are spaced apart from each other along the circumference of the tubular body 10. At the same time, each limiting rod 21 is restrained in the tubular body 10 and cannot move relative to the tubular body 10 along the circumference of the tubular body 10. When the limiting rods 21 are connected to the locking portion 22a, the tubular body 10 can be restrained in the circumferential direction by the restraining line 22. Specifically, when the limiting rods 21 are connected to the locking portion 22a, the locking portion 22a is radially restrained in the limiting rod 21 and the restraining line 22 restrains the tubular body 10 in the circumferential direction. It should be noted that the limiting rod 21 and the locking portion 22a are detachably connected. Thus, when the limiting rod 21 is separated from the locking portion 22a, the restraining force exerted by the limiting rod 21 on the tubular body 10 by pulling the restraining wire 22 through the locking portion 22a is released, thereby partially releasing the tubular body 10. Furthermore, because the semi-release device 20 includes at least two limiting rods 21, the restrained position of the tubular body 10 can be released in stages by sequentially releasing different limiting rods 21, thereby improving the controllability of the release operation and the accuracy of the release positioning. Compared to the prior art, when performing the staged release of the restrained position of the tubular body 10, one of the at least two limiting rods 21 can be released first, thereby partially releasing the restraint of the restraining wire 22 on the tubular body 10. This allows the tubular body 10 to be closer in size to the size anchored within the blood vessel, thereby achieving more precise positioning of the tubular body.

[0038] The restraining wire 22 is connected to the tubular body 10 and folded to form a first wire harness 221 and a second wire harness 222 . The folded position of the restraining wire 22 forms a locking portion 22 a . At least two limiting rods 21 are provided between the first wire harness 221 and the second wire harness 222 .

[0039] by Figure 1The semi-release device 20 shown includes three limiting rods 21 as an example. For the convenience of description, the three limiting rods 21 are respectively referred to as "first limiting rod 21'", "second limiting rod 21" and "third limiting rod 21"'". The first limiting rod 21', the second limiting rod 21" and the third limiting rod 21"' are respectively limited to the tubular body 10 at intervals along the circumference of the tubular body 10. The first limiting rod 21', the second limiting rod 21" and the third limiting rod 21"' are all inserted between the first wire harness 221 and the second wire harness 222, so that when the first limiting rod 21' close to the locking portion 22a is released, part of the tubular body 10 loses the restraint of the restraining line 22 and expands, that is, the part of the tubular body 10 is released until the locking portion 22a cooperates with the second limiting rod 21" (see Figure 2 As shown), at this time, the restraint line 22 is constrained by the second limit rod 21" and is maintained in a relaxed state by the tubular main body 10. At the same time, the tubular main body 10 no longer continues to expand under the constraint of the restraint line 22, that is, the tubular main body 10 is still in a state of being partially circumferentially constrained. Since the first limit rod 21' is separated from the locking portion 22a, a part of the structure of the tubular main body 10 loses the circumferential constraint of the restraint line 22 and is unfolded, so that the unfolded part has good stability. Correspondingly, when the third limit rod 21"' that cooperates with the locking portion 22a is released, the tubular main body 10 will expand to make the locking portion 22a cooperate with the third limit rod 21"'. At this time, the restraint line 22 is constrained by the third limit rod 21"' and is maintained in a relaxed state by the tubular main body 10. At the same time, the tubular main body 10 no longer continues to expand under the constraint of the restraint line 22, that is, the tubular main body 10 is still in a state of being partially circumferentially constrained.

[0040] 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'") that cooperate with the locking portion 22a, the tubular body 10 will be fully deployed and the release will be completed after the first limiting rod 21', the second limiting rod 21", and the third limiting rod 21'' are released from the locking portion 22a in turn. The endoluminal stent of the present invention can meet the need for step-by-step release of a part of the tubular body 10, thereby making the release operation well controllable, and thus improving the positioning accuracy when moving the tubular body 10 to the position where it is required to be implanted.

[0041] In addition, in some embodiments, the combination Figure 3As shown, the branch window 105 is provided in the portion between the first limiting rod 21' and the second limiting rod 21". Since this portion can be released by the cooperation between the first limiting rod 21' and the locking portion 22a, that is, it is no longer constrained by the binding line 22 and is in a relaxed state, it has good stability. To be precise, after the first limiting rod 21' is separated from the locking portion 22a, the second limiting rod 21" can continue to keep the binding line 22 in a state of local circumferential binding of the tubular body 10, so as to subsequently adjust the position of the tubular body 10 and position the branch window 105, thereby improving the positioning accuracy of the branch window 105.

[0042] It should be noted that, in other embodiments, the components that need to be positioned are not limited to the branch window 105, but may also be other components such as branches or keels that have higher positioning requirements. These components are set in the tubular body 10 corresponding to the position between the two limit rods 21, and the accuracy of the release position can be improved through the aforementioned step-by-step release method.

[0043] In an embodiment in which at least two limiting rods 21 are spaced apart from each other along the circumference of the tubular body 10 and are limited in the tubular body 10, the circumferential limiting method of the limiting rods 21 relative to the tubular body 10 can be to utilize a positioning structure, or to utilize the aforementioned binding wire 22 itself to limit the limiting rods 21 circumferentially relative to the tubular body 10 at the connection position between the first wire bundle 221 and the second wire bundle 222 and the tubular body 10.

[0044] For example, combined with Figure 3 and Figure 4 As shown, a lock buckle 104 is fixedly connected to the tubular body 10 , and the lock buckle 104 is used for allowing any one of the at least two limiting rods 21 to pass through.

[0045] A plurality of lock buckles 104 are fixedly connected to the tubular body 10 . The number of the lock buckles 104 is equal to the number of the limiting rods 21 . The plurality of lock buckles 104 respectively and correspondingly limit the limiting rods 21 in the tubular body 10 along the circumference of the tubular body 10 .

[0046] In some embodiments, a plurality of lock buckles 104 are fixedly connected to the tubular body 10 , and at least two limiting rods 21 are movably provided in the plurality of lock buckles 104 along their own axial directions.

[0047] In other embodiments, one of the at least two limiting rods 21 is constrained by the constraining line 22 at the connection position between the constraining line 22 and the tubular body 10 in a direction opposite to the extension direction of the tubular body 10 along the circumferential side of the tubular body 10, and multiple locks 104 correspondingly limit the other limiting rods 21 to the tubular body 10 along the circumference of the tubular body 10.

[0048] by Figure 3 and Figure 4 Taking the shown luminal stent as an example, there are two limiting rods 21, namely a first limiting rod 21' and a second limiting rod 21". The first limiting rod 21' is constrained by the binding line 22 at the connection position between the first wire bundle 221 and the second wire bundle 222 of the binding line 22 and the tubular body 10 in the opposite direction to the extension direction of the tubular body 10 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 circumference of the tubular body 10.

[0049] Combine Figure 5 and Figure 6 As shown, the restraining line 22 has a fixing portion 22b and at least two locking portions 22a. The fixing portion 22b is fixedly connected to the tubular body 10, and at least two limiting rods 21 are respectively and correspondingly arranged through at least two locking portions 22a. Therefore, after the corresponding limiting rods 21 and the locking portions 22a are released, the restraining line 22 correspondingly releases the local restraint on the tubular body 10, thereby successively pulling out the limiting rods 21 at different positions, which can achieve the effect of step-by-step release of the tubular body 10.

[0050] It should be noted that, in the embodiment where the binding line 22 has at least two locking portions 22a, these locking portions 22a can be located on the same side or on different sides relative to the fixing portion 22b. Figure 5 As shown, the two locking portions 22a are spaced apart from each other and are located on the same side of the fixing portion 22b, or as shown in FIG. Figure 6 As shown, the two locking portions 22a are located on different sides of the fixing portion 22b at a distance from each other.

[0051] In some embodiments, combined Figure 7 As shown, the restraining line 22 has a fixed portion 22b and a wire loop 22c, the fixed portion 22b is fixedly connected to the tubular body 10, and the end position of the wire loop 22c away from the fixed portion 22b forms a locking portion 22a, and two or more limiting rods 21 are passed through the wire loop 22c, so that after the limiting rod 21 that cooperates with the locking portion 22a is pulled out, the tubular body 10 expands and the locking portion 22a of the wire loop 22c cooperates with the adjacent limiting rod 21, and so on. By pulling out the limiting rods 21 that cooperate with the locking portion 22a in turn, the tubular body 10 can be released in steps, thereby improving the controllability of the release operation and the release accuracy.

[0052] Further, combined with Figure 8 and Figure 9 As shown, the binding wire 22 has at least two wire loops 22c, and the at least two wire loops 22c are located at different sides of the fixing portion 22b at intervals from each other (see FIG. Figure 8 shown) or on the same side (see Figure 9 shown).

[0053] Combine Figure 10 As shown, a restraining channel 24 is provided on the tubular main body 10, and the central angle corresponding to the restraining channel 24 is less than 360°. An opening 24a is formed at the position of the restraining channel 24 corresponding to the limiting rod 21, and the opening 24a is connected to the inner cavity of the restraining channel 24. The restraining line 22 is passed through the restraining channel 24, and the locking portion 22a is used to connect with the corresponding limiting rod 21 at the opening 24a.

[0054] It should be noted that the structure of the binding channel 24 has many possibilities, for example, Figure 10 and Figure 11 As shown, the endoluminal stent includes a covering 102 that can isolate blood flow, a covering 103 is provided on the outer surface of the covering 102, and a restraining channel 24 is formed between the covering 103 and the covering 102; or Figures 1 to 3 As shown, a plurality of limiting ring buckles 223 are provided on the tubular body 10 , the restraining channel 24 is formed by the plurality of limiting ring buckles 223 , and the restraining line 22 is passed through the limiting ring buckles 223 .

[0055] Combine Figure 12 and Figure 13 As shown, the tubular body 10 includes a corrugated ring 101, which is made of a material with good biocompatibility, such as nickel titanium, stainless steel, etc. In some embodiments, multiple coils of corrugated rings 101 are arranged in sequence along the axial direction of the tubular body 10 from the proximal end to the distal end, preferably arranged in parallel and spaced apart.

[0056] The corrugated ring 101 comprises a plurality of crests 101a, a plurality of troughs 101b, and a plurality of connecting rods 101c connecting adjacent crests 101a and troughs 101b. The corrugated ring 101 is a closed cylindrical structure, and multiple turns of the corrugated ring 101 can have the same or similar corrugated shapes. It is understood that this embodiment does not limit the specific structure of the corrugated ring 101. The corrugated ring 101 can have a waveform shape as desired, and the number and height of the waveforms in each turn of the corrugated ring 101 can also be adjusted as needed.

[0057] The multi-turn corrugated ring 101 is connected to a coating 102 , which is made of a polymer material with good biocompatibility, such as PTFE (Poly tetra fluoroethylene), FEP (Fluorinated ethylene propylen), and PET (Polyethylene terephthalate).

[0058] In some embodiments, see Figure 12 and Figure 13 As shown, within the axial region where the corrugated ring 101 is located, the tubular body 10 has at least two spaced apart restraining channels 24 corresponding to the corrugated ring 101. The restraining wires 22 within the at least two restraining channels 24 are used to apply radial restraining forces to one side and the other side of the mid-position coil of the corrugated ring 101, respectively. The mid-position coil refers to a ring coil formed by sequentially connecting the midpoints of the connecting rods 101c in the corrugated ring 101 along the circumference of the tubular body 10. This structural arrangement ensures that the crests 101a and troughs 101b of the corrugated ring 101 are uniformly restrained, thereby preventing uneven force on the crests 101a and troughs 101b, which could cause them to tilt and anchor or contact the vessel wall with greater friction, affecting the axial and circumferential position adjustment of the luminal stent.

[0059] Continue reading Figure 12 and Figure 13 As shown, the corrugated ring 101 further includes a first region A1 and a second region A2, spaced opposite each other along its axial direction and surrounding its circumference. The width D1 of the first region A1 extends axially from the crest 101a toward the trough 101b by 2 / 5 of the wave height. In other words, the two sides b1 and b2 defining the width D1 of the first region A1 surround the corresponding crest 101a of the corrugated ring 101 and a position perpendicularly spaced from the crest 101a by 2 / 5 of the wave height. The width D2 of the second region A2 extends axially from the trough 101b toward the crest 101a by 2 / 5 of the wave height. In other words, the two sides b3 and b4 defining the width D2 of the second region A2 surround the corresponding trough 101b of the corrugated ring 101 and a position perpendicularly spaced from the trough 101b by 2 / 5 of the wave height. It should be noted that the wave height refers to the vertical distance from the wave crest 101 a to the wave trough 101 b along the axis of the wave-shaped ring 101 .

[0060] At least one of the at least two restraining channels 24 is located within the first area A1, and at least one of the at least two restraining channels 24 is located within the second area A2. Thus, the restraining wires 22 located within the restraining channels 24 restrain the corresponding positions of the first area A1 and the second area A2 of the corrugated ring 101, respectively, so that the crests 101a and troughs 101b of the corrugated ring 101 are subjected to uniform force, thereby improving the stability of the tubular body 10 and preventing the crests 101a or troughs 101b from tilting.

[0061] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A luminal stent, comprising a tubular body and a semi-release device connected to the tubular body, characterized in that: The semi-release device includes a restraining line and at least two limiting rods provided on the tubular body, the restraining line has a locking portion, and the at least two limiting rods are limited to the tubular body at intervals along the circumference of the tubular body, so that the limiting rods include a first limiting rod and a second limiting rod provided in sequence; the limiting rods can be detachably connected to the locking portion; wherein, when the first limiting rod is connected to the locking portion, the locking portion is limited to the first limiting rod along the radial direction of the first limiting rod and causes the restraining line to restrain the tubular body circumferentially, When the first limiting rod is separated from the locking portion, the first limiting rod releases the restraining force on the tubular body caused by pulling the restraining line through the locking portion, so that part of the tubular body is released, until the locking portion cooperates with the second limiting rod, so that the restraining line is constrained by the second limiting rod and is kept in a relaxed state by the tubular body. At the same time, the tubular body no longer expands under the constraint of the restraining line. After the first limiting rod, the second limiting rod and the locking portion are released in sequence, the tubular body will be fully unfolded. The restraining wire is connected to the tubular body and folded in half to form a first wire harness and a second wire harness, the folded position of the restraining wire forms the locking portion, and the at least two limiting rods are provided between the first wire harness and the second wire harness; or The restraining line has a fixing portion and a wire loop, the fixing portion is fixedly connected to the tubular body, the end position of the wire loop away from the fixing portion forms the locking portion, and the at least two limiting rods are inserted into the wire loop.

2. The endoluminal stent according to claim 1, characterized in that: The binding wire has at least two wire loops, and the at least two wire loops are located on the same side or different sides of the fixing portion at intervals from each other.

3. The endoluminal stent according to claim 1 or 2, characterized in that: A plurality of lock buckles are fixedly connected to the tubular body, and the at least two limiting rods are movably provided in the plurality of lock buckles along their own axial directions.

4. The endoluminal stent according to claim 1, characterized in that: A restraining channel is provided on the tubular body, and the central angle corresponding to the restraining channel is less than 360°. The restraining channel is formed with an opening corresponding to the position of the limiting rod, and the opening is connected to the inner cavity of the restraining channel. The restraining line is passed through the restraining channel, and the locking part is used to connect with the corresponding limiting rod at the opening.

5. The endoluminal stent according to claim 4, characterized in that: The tubular body includes a corrugated ring. Within the axial interval where the corrugated ring is located, the tubular body has at least two restraining channels spaced apart and corresponding to the corrugated ring. The restraining wires in the at least two restraining channels are respectively used to apply radial restraining force to one side and the other side of the mid-position coil of the corrugated ring.

6. The endoluminal stent according to claim 5, characterized in that: The wavy ring includes a plurality of crests, a plurality of troughs, and a plurality of connecting rods respectively connecting adjacent crests and troughs. The wavy ring also includes a first area and a second area spaced opposite to each other along its axial direction and surrounding its circumference. The width of the first area is 2 / 5 times the wave height extending axially from the crest to the trough. The width of the second area is 2 / 5 times the wave height extending axially from the trough to the crest. At least one of the at least two restraining channels is located in the first area, and at least one of the at least two restraining channels is located in the second area.

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