CN211271401U

CN211271401U - Tubular tectorial membrane structure and tectorial membrane support

Info

Publication number: CN211271401U
Application number: CN201920996086.6U
Authority: CN
Inventors: 马晓曼; 胡冰清; 赵海娜
Original assignee: Maitong Medical Technology Jiaxing Co ltd
Current assignee: Zhejiang Maitong Intelligent Manufacturing Technology (Group) Co.,Ltd.
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-08-18
Anticipated expiration: 2029-06-28

Abstract

The utility model discloses a tubulose tectorial membrane structure and a tectorial membrane support. The tubular membrane-coated tube structure comprises a main tube body, a sealing part and two or more branch tube bodies, wherein the main tube body is connected with one end of each branch tube body respectively and communicated with the other end of each branch tube body, the sealing part is arranged between at least one pair of adjacent two branch tube bodies, the sealing part is arranged in a transition area of the at least one pair of adjacent two branch tube bodies, which is connected with the main tube body and the branch tube bodies respectively, so that blood is prevented from seeping out from the transition area. The stent graft comprises the tubular stent graft structure and a stent body, wherein the tubular stent graft structure is coated on the outer surface of the stent body. The tubular membrane-coated tube structure has small amount of blood seepage.

Description

Tubular tectorial membrane structure and tectorial membrane support

Technical Field

The utility model relates to a medical instrument field of treatment intravascular disease especially relates to a tubulose tectorial membrane structure and a tectorial membrane support.

Background

In recent years, in the medical field, a stent graft is gradually the mainstream product of an artificial blood vessel, and the stent graft is composed of a stent graft and a metal stent, wherein the stent graft mainly plays a role in blood blocking. The coating material is generally polyester, polyurethane, polytetrafluoroethylene, silk and the like, and the coating structure is plain weave, twill weave, satin weave and the change weave thereof. The diseased vessels are divided into a thoracic main vessel and an abdominal main vessel according to the difference of the diseased positions, and the stent graft used for the abdominal main vessel has a double-branch shape according to the characteristics of the diseased positions, so that the stent graft used for the stent graft also has a double-branch structure.

The film covering structure on the market at present is usually manufactured by two processing modes, the first mode is that a planar film covering is adopted to be sewn into a tubular film covering structure, but the sewing position of the film covering structure not only seeps blood, but also increases the release resistance of the film covering stent; the second is that a tubular covered structure is directly woven in an integrated forming mode, as shown in fig. 1, but when a main body 20 (a thicker tube) is transited to a branch tube 21 and a branch tube 22, a larger hole is left at the joint of the main body 20 and the branch tube 21, the branch tube 22, and the hole is shown as a structure shown in a position a in fig. 2, which is a structural defect caused by the existing integrated forming and weaving process, and this structural defect causes a large amount of blood seepage at the joint of the three tubes of the covered stent, and at present, the hole is usually repaired by sewing, but the blood seepage phenomenon still exists in the sewn area.

Therefore, the problem of blood leakage at the joint of the three tubes inevitably exists no matter what kind of tubular film structure is made, and the technical problem to be solved in the field is urgent.

SUMMERY OF THE UTILITY MODEL

Based on this, there is a need for a tubular cover film structure and a method for preparing the same, which can effectively solve the problem of the conventional cover film structure that the large blood seepage exists in the transition area between the main body and the branch.

The utility model provides a tubulose tectorial membrane structure, including being responsible for the body, at least one seal and two or two above the branch body, wherein, be responsible for the body and each wherein one end of branch body is connected respectively and is linked together, at least a pair of adjacent two interconnect's transition region is provided with between the branch body the seal, the seal with be responsible for the body and at least a pair of adjacent two the branch body seals respectively and connects for be used for preventing blood certainly transition region oozes.

The term "adjacent" in the above-mentioned "the closing portion is provided between at least one pair of adjacent two of the branch pipe bodies" means that no other branch pipe body or blocking member is provided between the two branch pipe bodies, and does not represent the closest branch pipe body selected in the case where there are a plurality of branch pipe bodies; the "closed connection" in the above "the closing part is in closed connection with the main tube and each of the branch tubes" means that when blood flows from the main tube or the branch tubes to the closing part, the blood is subjected to resistance and does not smoothly flow into the closing part and/or from the closing part, but does not mean that the blood flow must be completely blocked.

In one embodiment, the closure portion is a planar structure.

In one embodiment, the closure portion is a single-layer planar structure.

In one embodiment, the closure portion has a length of 1mm to 10mm and a width of 1mm to 8 mm.

In one embodiment, the closure portion is a plain weave construction.

In one embodiment, the sealing portion is disposed at a transition region where each pair of adjacent two branch pipe bodies are connected with each other.

In one embodiment, the closing portion has a first closed end and a second closed end, at least one pair of adjacent two of the branch pipes includes a first branch pipe and a second branch pipe, and the first branch pipe and the second branch pipe are spaced apart by the closing portion in a radial direction of the first branch pipe, and the main pipe and the closing portion are connected at the first closed end, and at least one pair of adjacent two of the branch pipes are spaced apart at the second closed end.

In one embodiment, the first closed end has a rectangular edge, the second closed end has an arcuate edge, and the arcuate edge is concave toward the first closed end.

In one embodiment, the shape of the closure portion is a polygon.

In one embodiment, the sum of the inner diameters of the branch pipes is equal to the inner diameter of the main pipe.

In one embodiment, the closing portion is integrally woven with the main pipe body and each of the branch pipe bodies.

The utility model discloses a tubulose tectorial membrane structure not only can solve traditional abdomen owner tectorial membrane support's tectorial membrane has the problem of great blood volume of oozing in main part and branched transition district, also is applicable to other a plurality of branched tectorial membrane structures moreover, improves tectorial membrane structure's security and validity, has reduced the blood volume of oozing, has improved product property ability.

The utility model also provides a covered stent.

The tectorial membrane stent comprises the tubular tectorial membrane structure and a stent main body, wherein the tubular tectorial membrane structure is coated on the outer surface of the stent main body.

The utility model discloses a tubulose tectorial membrane structure compares traditional manual sewing up or integrated into one piece's tectorial membrane structure, and main part and branched transition zone are sealed reliable, and the oozing blood volume is lower or hardly, has effectively avoided the hole oozing blood phenomenon because of the establishment technology among the prior art causes, and manufacturing process can effectively improve machining efficiency, need not the manual work in later stage and sews up, practices thrift the human cost, is suitable for extensive popularization and application.

Drawings

FIG. 1 is a front view of a prior art tubular film structure;

FIG. 2 is a top view of a prior art tubular film structure;

fig. 3 is a front view of a tubular film structure according to an embodiment of the present invention;

fig. 4 is an enlarged view of the structure at position B of the tubular coating structure shown in fig. 3.

Description of the reference numerals

10: a tubular membrane-coated tube structure; 100: a primary tube; 200: a first branch pipe body; 300: a second branch pipe body; 400: a closing part; 40 a: a first closed end; 400 b: a second closed end; 20: a main pipe; 21. 22: and (4) branch pipes.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

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 in the description of the invention herein 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.

An embodiment of the utility model provides a covered stent. The covered stent comprises a tubular covered structure and a stent main body, wherein the tubular covered structure is covered on the outer surface of the stent main body.

Referring to fig. 3, the tubular film structure 10 includes a main pipe 100, a first branch pipe 200, a second branch pipe 300, and a sealing part 400.

In one embodiment, the first branch pipe 200 and the second branch pipe 300 are disposed in parallel, one end of the main pipe 100 is a blood inlet end, the other end of the main pipe is connected and communicated with one end of the first branch pipe 200 and one end of the second branch pipe 300, respectively, and the other end of the first branch pipe 200 and the other end of the second branch pipe 300 are blood outlet ends. The sealing part 400 is respectively connected to the main tube 100, the first branch tube 200 and the second branch tube 300, and further, the sealing part 400 is respectively connected to the main tube 100, the first branch tube 200 and the second branch tube 300 in a sealing manner, and the sealing part 400 is located in a transition region where the first branch tube 200 and the second branch tube 300 are connected to prevent blood from leaking out of the transition region.

Preferably, the closing part 400 is integrally woven with the main pipe body 100, the first branch pipe body 200, and the second branch pipe body 300, and the closing part 400 has a planar structure, and further preferably has a single-layer structure and/or a plain-weave structure. The single-layer plane structure can provide better flexibility and foldability for the closed part, the tubular film-coated structure 10 is coated on the stent body, the film-coated stent is loaded on the conveying device, and the plain structure has the characteristic of high compactness and can further provide good anti-seepage performance. Of course, in other embodiments, the closing portion 400 may also be a twill, satin, or multi-layer structure, which is not limited by the present invention.

As shown in fig. 4, the closing part 400 is substantially rectangular and has a first closed end 400a and a second closed end 400b, the first branch pipe body 200 and the second branch pipe body 300 are spaced apart by the closing part 400 in a radial direction of the first branch pipe body 200, and the main pipe body 100 and the closing part 400 are connected at the first closed end 400a, and the first branch pipe body 200 and the second branch pipe body 300 are separated at the second closed end 400 b.

Compared with the mode that the first branch pipe body 200 is connected with the second branch pipe body 300 through sewing in the prior art, the sealing part provided in the embodiment can not only avoid the blood seepage condition of small holes caused by sewing, but also strengthen the strength of the connection area of the first branch pipe body 200 and the second branch pipe body 300, and further improve the sealing reliability.

With further reference to fig. 4, preferably, the first closed end 400a of the closed portion 400 has a rectangular edge, and the second closed end 400b of the closed portion 400 has an arc-shaped edge, and the arc-shaped edge is recessed toward the first closed end 400a, so that the first branch pipe body 200 and the second branch pipe body 300 have more flexibility, and the tearing at the second closed end 400b caused by the relative movement between the first branch pipe body 200 and the second branch pipe body 300 is effectively prevented.

Those skilled in the art will appreciate that, in other embodiments, the structure and shape of the sealing portion 400 are not limited thereto, and the structure and shape of the sealing portion 400 may also be designed according to the shape and relative position relationship of the first branch pipe body 200 and the second branch pipe body 300, for example, the sealing portion 400 may also be a polygon such as a triangle or a trapezoid, and the present invention is not only suitable for a film structure having two branch pipe bodies, but also suitable for a film structure having three or more branch pipe bodies, and the present invention is not limited thereto.

In one embodiment, the length of the closure portion 400 along the axial direction of the main tube 100 is 1mm to 10mm, for example, the length of the closure portion 400 is 1mm, 2mm, 5mm, 10mm or other non-integer value. The width of the closure portion 400 in the radial direction of the main tube 100 is 1mm-8mm, for example the width of the closure portion 400 is 1mm, 2mm, 5mm, 8mm or other non-integer value.

In one embodiment, the main pipe body 100 is smoothly transitionally connected with the outer circumferential surface of the first branch pipe body 200 and the outer circumferential surface of the second branch pipe body 300.

The utility model discloses a tubulose tectorial membrane structure 10 can solve the tectorial membrane that traditional abdomen owner tectorial membrane support has great oozing blood in main part and the branched transition district problem, and the closure 400 can effectively avoid the tectorial membrane to produce the hole in the branch department of being responsible for body 100 and first branch body 200, second branch body 300, reduces the oozing blood volume of tectorial membrane, improves tectorial membrane support artificial blood vessel's security and validity effectively.

The present embodiment also relates to a method of manufacturing the tubular film structure 10.

In this embodiment, two shuttles need to be used to the loom, and every shuttle drives a woof respectively, and the warp divide into upper warp and lower floor's warp, certainly, in other embodiments, also can use more than two shuttles for weave more than two branch's body, the utility model discloses do not limit to this. The tubular film structure 10 is integrally woven from weft yarns and upper and lower warp yarns.

Specifically, firstly, a first shuttle is adopted to drive weft yarns to respectively weave with upper-layer warp yarns and lower-layer warp yarns to form an upper surface and a lower surface of a partial main pipe body, the upper surface and the lower surface are used for forming an upper-layer half pipe and a lower-layer half pipe of the main pipe body, the upper-layer half pipe and the lower-layer half pipe are connected to form the main pipe body in the weaving process, and the main pipe body has a first preset width.

Then, dividing part of the upper layer warp yarns into a first upper layer warp yarn and a second upper layer warp yarn, dividing part of the lower layer warp yarn into a first lower layer warp yarn and a second lower layer warp yarn, merging the rest part of the upper layer warp yarn and the lower layer warp yarn into the same layer warp yarn, preferably, the width of the same layer warp yarn is 0.5cm-3cm, and continuously using the first shuttle to drive the weft yarn to weave with the first upper layer warp yarn, the first lower layer warp yarn, the merged same layer warp yarn, the second upper layer warp yarn and the second lower layer warp yarn respectively to form part of the first branch pipe body 200, the closed part 400 and part of the second branch pipe body 300, that is, the first upper layer warp yarn, the first lower layer warp yarn and the weft yarn are woven into part of the first branch pipe body 200, and the merged same layer warp yarn and weft yarn form the closed part 400, the second upper layer warp, the second lower layer warp, and the weft are woven to form a part of the second branch pipe body 300. The closure 400 is located at a transition region where a portion of the first branch pipe body 200 is connected with a portion of the second branch pipe body 300, and more specifically, the closure 400 is located between a portion of the first branch pipe body 200 and a portion of the second branch pipe body 300. The closure 400 has a second predetermined width, the width of the closure being 0.5cm-3cm, i.e. corresponding to the width of the warp yarns of the same layer.

The same-layer warp yarns are restored to the upper-layer warp yarns and the lower-layer warp yarns in the predetermined number, the upper-layer warp yarns are divided into third upper-layer warp yarns and fourth upper-layer warp yarns, the lower-layer warp yarns are divided into third lower-layer warp yarns and fourth lower-layer warp yarns, the third upper-layer warp yarns and the third lower-layer warp yarns are used for weaving the remaining first branch pipe body 200, and the fourth upper-layer warp yarns and the fourth lower-layer warp yarns are used for weaving the second branch pipe body 300.

And continuously driving the weft yarns and the first upper-layer warp yarns, the first lower-layer warp yarns, the third upper-layer warp yarns and the third lower-layer warp yarns to weave the remaining first branch pipe body 200 by adopting a first shuttle, so as to weave a complete first branch pipe body 200, and simultaneously introducing a second shuttle to drive the weft yarns and the second upper-layer warp yarns, the second lower-layer warp yarns, the fourth upper-layer warp yarns and the fourth lower-layer warp yarns to weave a remaining second branch pipe body 300, so as to weave a complete second branch pipe body 300. The first branch body 200 has a third predetermined width and the second branch body 300 has a fourth predetermined width.

It is to be understood that, in the weaving process of the first and

second branch pipes

200 and 300, the first and third upper warp yarns are used to weave the upper half pipe of the first branch pipe 200 with the weft yarns, and the first and third lower warp yarns are used to weave the lower half pipe of the first branch pipe 200 with the weft yarns; the second upper layer warp and the fourth upper layer warp are used for weaving the upper half pipe of the second branch pipe 300 with the weft, and the second lower layer warp and the fourth lower layer warp are used for weaving the lower half pipe of the second branch pipe 300 with the weft; the upper half pipe of the first branch pipe body 200 is connected with the lower half pipe of the first branch pipe body 200 to form a complete first branch pipe body 200, and the upper half pipe of the second branch pipe body 300 is connected with the lower half pipe of the second branch pipe body 300 to form a complete second branch pipe body 300.

In the present embodiment, the third predetermined width coincides with the fourth predetermined width. First predetermined width is the sum of second predetermined width, third predetermined width and fourth predetermined width, certainly, in other embodiments, also can design the width of each part according to the branch characteristics of tubulose tectorial membrane structure 10, and upper yarn and lower floor's yarn also can divide into more shares to be used for weaving into more branch's body, when weaving, also can weave earlier branch's body, weave the main pipe body again, the utility model discloses do not limit to this.

The utility model discloses a preparation method of tubulose tectorial membrane structure, simple process compares traditional manual sutural mode, and festival reinforce, and the shutoff effect of the tubulose tectorial membrane structure who produces is more excellent, and the oozing blood volume is showing and is reducing.

Compare with the tubulose membrane covered stent among the prior art, the utility model discloses a tubulose membrane covered tube structure can reduce the amount of blood that oozes by a wide margin, the utility model discloses the people is in the laboratory, according to industry standard test method, adopts rivers to replace the blood flow, and transition region to being connected between two adjacent branch's bodies among the prior art exists the tectorial membrane structure an of hole, the transition region hole that is connected between two adjacent branch's bodies through sutural tectorial membrane structure b with the embodiment of the utility model provides an in the transition region that is connected between two adjacent branch's bodies be provided with tectorial membrane structure c of seal (length is 8mm, width is 1mm) test, tectorial membrane structure an, tectorial membrane structure b and tectorial membrane structure c's every 3 of quantity, can obtain following data: the average water seepage amount of the transition region of the film covering structure a is 360ml/min/cm²And the average water seepage amount of the transition area of the film covering structure b is as follows: 240ml/min/cm²And the average water seepage amount of the transition area of the film covering structure c is as follows: 58ml/min/cm². In the best case, the average water penetration in the transition region of the film structure c is almost zero. As can be seen from the comparison, the tubular film-covered structure in the above embodiment of the present invention can effectively reduce the amount of blood seepage when used in the stent operation.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The tubular film covering structure is characterized by comprising a main pipe body, at least one sealing part and two or more than two branch pipe bodies, wherein the main pipe body is connected and communicated with one end of each branch pipe body, the sealing part is arranged in a transition region where at least one pair of adjacent two branch pipe bodies are connected with each other, and the sealing part is respectively connected with the main pipe body and the at least one pair of adjacent two branch pipe bodies in a sealing manner so as to prevent blood from seeping out of the transition region.

2. The tubular film-covering structure of claim 1, wherein the closed portion is a planar structure.

3. The tubular film-coating structure of claim 2, wherein said closed portion is a single-layer planar structure.

4. The tubular film-coating structure of claim 2, wherein said closing portion has a length of 1mm to 10mm and a width of 1mm to 8 mm.

5. The tubular film-coating structure of any one of claims 1 to 4, wherein said closure portion is of plain weave construction.

6. The tubular film-coating structure of any one of claims 1 to 4, wherein each pair of adjacent transition areas between two branch pipe bodies connected to each other is provided with said closing portion.

7. The tubular lamination structure according to any one of claims 1 to 4, wherein the closed portion has a first closed end and a second closed end, at least one pair of adjacent two of the branch pipes comprises a first branch pipe and a second branch pipe, and the first branch pipe and the second branch pipe are spaced apart by the closed portion in a radial direction of the first branch pipe, and the main pipe and the closed portion are connected at the first closed end, and at least one pair of adjacent two of the branch pipes are spaced apart at the second closed end.

8. The tubular film structure of claim 7, wherein the first closed end has a rectangular edge, the second closed end has an arcuate edge, and the arcuate edge is a structure that is concave toward the first closed end.

9. The tubular film-coating structure of any one of claims 1 to 4, wherein said closed portion is polygonal in shape.

10. The tubular film-coating structure of any one of claims 1 to 4, wherein the sum of the inner diameters of the respective branch pipe bodies is equal to the inner diameter of the main pipe body.

11. The tubular film-covering structure according to any one of claims 1 to 4, wherein the closing portion is integrally formed by weaving with the main pipe body and each of the branch pipe bodies.

12. A stent graft comprising the tubular stent graft structure of any one of claims 1-11 and a stent body, wherein the tubular stent graft structure is coated on the outer surface of the stent body.