CN213098551U - Full-film-coated airway stent - Google Patents
Full-film-coated airway stent Download PDFInfo
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- CN213098551U CN213098551U CN202020925149.1U CN202020925149U CN213098551U CN 213098551 U CN213098551 U CN 213098551U CN 202020925149 U CN202020925149 U CN 202020925149U CN 213098551 U CN213098551 U CN 213098551U
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- stent
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- airway
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- 239000012528 membrane Substances 0.000 claims abstract description 42
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 9
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 7
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 6
- 238000009941 weaving Methods 0.000 claims description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 239000004945 silicone rubber Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 14
- 239000002184 metal Substances 0.000 abstract description 14
- 210000002489 tectorial membrane Anatomy 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 230000035807 sensation Effects 0.000 abstract description 6
- 230000002829 reductive effect Effects 0.000 abstract description 3
- 210000001519 tissue Anatomy 0.000 description 8
- 239000010410 layer Substances 0.000 description 7
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 7
- 208000031481 Pathologic Constriction Diseases 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 230000036262 stenosis Effects 0.000 description 6
- 208000037804 stenosis Diseases 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000007731 hot pressing Methods 0.000 description 4
- 206010063560 Excessive granulation tissue Diseases 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 210000001126 granulation tissue Anatomy 0.000 description 3
- 206010020718 hyperplasia Diseases 0.000 description 3
- 210000003437 trachea Anatomy 0.000 description 3
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000000241 respiratory effect Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- 208000000059 Dyspnea Diseases 0.000 description 1
- 206010013975 Dyspnoeas Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 210000000621 bronchi Anatomy 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
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- 230000000670 limiting effect Effects 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 206010061289 metastatic neoplasm Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000004877 mucosa Anatomy 0.000 description 1
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000008855 peristalsis Effects 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 229920006268 silicone film Polymers 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The application provides a full-film-covered airway stent, which comprises a stent main body, a stent main body and a stent body, wherein the stent main body is of a porous tubular structure; and the membrane structure covers the bracket main body and comprises an inner membrane and an outer membrane, wherein the inner membrane covers the inner wall of the bracket main body, and the outer membrane covers the outer wall of the bracket main body. Utilize this full tectorial membrane air flue support, can all have stronger support performance to the part and the whole of air flue, fully solve the narrow problem of part in the air flue and self does not take place fatigue failure, the technological structure of full tectorial membrane greatly degree has reduced patient's foreign body sensation and exclusive reaction, has prevented metal support and human tissue's direct contact simultaneously.
Description
Technical Field
The utility model relates to the field of medical equipment, and more specifically relates to a full tectorial membrane air flue support.
Background
Malignant stenosis of airway refers to a respiratory tract stenosis caused by invasion or compression of primary or metastatic tumors of trachea, carina, left and right main bronchi and middle bronchial tubes and malignant tumors of adjacent organs, which seriously threaten human health and cause respiratory and ventilation obstruction to patients. The implanted bracket not only can quickly and effectively relieve the dyspnea of a patient and improve the life quality, but also wins time for further treatment.
The existing clinically used stents are mostly nickel-titanium alloy stents, the overall supporting force of the stents is strong, the plasticity is good, but the local supporting force is weak, when the stents are placed in uneven or irregular narrow sections, the wall sticking effect of the stents is poor, the force for expanding the local narrow sections is insufficient, and the stents are easy to generate fatigue fracture at the uneven local positions along with the peristalsis of the respiratory process of an airway; in order to reduce the stimulation of the stent on the airway of the human body and reduce the foreign body sensation and exclusive reaction of the human body, thereby inhibiting the growth of granulation tissues and tumors inside and outside the airway cavity, the airway is generally clinically expanded by adopting the covered stent, the covered stent is generally covered by adopting a silicone film adhesion mode or a single-layer polymer film suture mode, the covered stent is simply fixed with the covered stent together, the self-expansion of the stent and the film at other positions is not influenced by the stress of the stent at a local position, and therefore, the stent at the uneven narrow areas cannot fully and effectively expand the narrow areas.
Therefore, there is a need for a novel full-coated airway stent that can effectively support a partially constricted portion of an airway.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the application provides a full-coated airway stent which has strong local and overall supporting performance and can fully solve the problem of local stenosis in an airway without fatigue damage; the process structure of the full film covering greatly reduces the foreign body sensation and exclusive reaction of a patient, and simultaneously prevents the direct contact between the metal stent and human tissues; and can safely, effectively and simply realize the recovery after a certain period of putting.
The application provides a full-film-covered airway stent, which comprises a stent main body, a stent core and a stent core, wherein the stent main body is of a porous tubular structure; and the membrane structure covers the bracket main body and comprises an inner membrane and an outer membrane, wherein the inner membrane covers the inner wall of the bracket main body, and the outer membrane covers the outer wall of the bracket main body. Utilize this full tectorial membrane air flue support, can all have stronger support performance to the part and the whole of air flue, fully solve the narrow problem of part in the air flue and self does not take place fatigue failure, the technological structure of full tectorial membrane greatly degree has reduced patient's foreign body sensation and exclusive reaction, has prevented metal support and human tissue's direct contact simultaneously.
In one embodiment, the stent body is formed by intertwining braiding of metal wires.
In one embodiment, the stent main body is formed by winding and weaving a single nitinol wire, and two ends of the single nitinol wire are in a free state. By the embodiment, when the airway stent needs to be recovered from the airway of a human body, after one free end of the metal wire is clamped by a general catheter clamp with a sheath tube, the whole stent can be pulled into a long thread shape from a straight tube shape, and the long thread shape is pulled into the catheter to complete recovery.
In one embodiment, the metal wire is a nitinol wire.
In one embodiment, a thermocompression bonding layer is present between the inner film and the outer film. In this embodiment, the inner layer film and the outer layer film can be tightly bonded to each other.
In one embodiment, the membrane structure is made of polytetrafluoroethylene.
In one embodiment, the membrane structure is made of silicone rubber.
In one embodiment, the outer surface of the outer layer film is provided with non-slip protrusions. With this embodiment, displacement of the airway stent in the trachea can be prevented.
In one embodiment, the non-slip protrusions are rectangular in configuration.
In one embodiment, the membrane structure exceeds the stent body by 1-1.5 mm in the axial direction of the stent body. Through this embodiment, can reduce the stimulation of air flue support terminal to the trachea mucosa to prevent granulation tissue hyperplasia.
The utility model provides a full tectorial membrane air flue support compares in prior art, has following technological effect:
(1) the support has stronger local and integral support performance, can fully solve the problem of local stenosis in the air passage without fatigue failure;
(2) the full film covering process prevents the metal stent from directly contacting with human tissues;
(3) can safely, effectively and simply realize the recovery after a certain period of putting.
The above-mentioned technical characteristics can be combined in various suitable ways or replaced by equivalent technical characteristics as long as the purpose of the invention can be achieved.
Drawings
The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:
fig. 1 shows a schematic structural view of a fully-covered airway stent according to an embodiment of the present invention;
fig. 2 shows a schematic structural view of a fully-coated airway stent without an outer membrane disposed according to an embodiment of the present invention;
fig. 3 shows a schematic view of the deployment of a stent body according to an embodiment of the invention;
fig. 4 shows a schematic structural diagram of the stent body after being stretched according to the embodiment of the present invention.
List of reference numerals:
10-full tectorial membrane airway stent;
1-a stent body;
2-a membrane structure;
21-inner layer film;
22-outer film.
In the drawings, like parts are provided with like reference numerals. The drawings are not to scale.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Fig. 1 and fig. 2 are schematic structural diagrams of a full-covered airway stent 10 provided by the present invention. As shown in fig. 1 and 2, the full-coverage airway stent 10 may include a stent main body 1 and a membrane structure 2 covering the stent main body 1, wherein the stent main body 1 is a porous tubular structure, the membrane structure 2 is composed of an inner membrane 21 and an outer membrane 22 (as shown in fig. 2), the inner membrane 21 covers the inner wall of the stent main body 1 of the tubular structure, and the outer membrane 22 covers the outer wall of the stent main body 1 of the tubular structure, which are tightly combined to clamp the stent main body 1 therein.
The stent main body 1 in the application is formed by winding and weaving a nickel-titanium memory alloy wire.
On the one hand, the inner film 21 and the outer film 22 are completely covered on the wall of the tubular structure, so that the direct contact between the metal stent body 1 and the human tissue can be prevented, and the foreign body sensation and the exclusive reaction of the patient can be reduced. On the other hand, the two inner films 21 and the outer film 22 are respectively located on the inner wall and the outer wall of the stent body 1 and bonded together by a hot-pressing manner (i.e. forming a hot-pressing bonding layer), the two side films located at the pores of the stent body 1 are tightly bonded into a film by the hot-pressing bonding layer, and the two side films located inside and outside the metal wire of the stent body 1 are respectively tightly bonded on both sides of the metal wire to form a state of tightly wrapping the metal wire, so when the full-covered airway stent 10 is radially extruded at a locally narrow part in the airway, local stenosis is easily caused for a suture stent with a weak bonding degree of the covering film and the metal wire, and when the locally metal wire of the stent body 1 is radially extruded by local hyperplasia, the radial extrusion force applied to the local position of the stent body 1 is transmitted through the tightly bonded covering film and affects the stress state of the entire stent body 1, namely, the radial extrusion force of the covered stent body 1 on the local narrow part in the air passage is converted into the stress of the whole stent body 1. Here, it should be understood that the local position where the amount of deformation of the stent graft body 1 is the largest is still the narrowest position of the airway, the amount of deformation of other parts on the stent graft body 1 depends on the distance from the narrow part, the closer the deformation is, the smaller the deformation is, but the maximum deformation is still small due to the distribution of the deformation of the whole stent, and therefore the overall effective expansion rate of the stent graft body is much higher than that of the common single-layer stent graft and stent graft.
The clinical air passage support has a recyclable technical requirement, so that the support placed in the air passage is required to be always independent in a human body, cannot be integrated with the air passage due to granulation tissue hyperplasia in the air passage, and cannot generate adverse effects such as complications due to factors such as corrosion, fracture and the like. As mentioned above, the stent body 1 may be formed by winding and weaving nitinol wires. Fig. 3 is a flat view of the stent body 1 in fig. 1 and 2 after being cut along one generatrix thereof, and preferably, as shown in fig. 3 and 4, the stent body 1 is formed by winding and weaving a single nitinol wire, that is, the stent body 1 is a unitary component, and both ends of the single nitinol wire are located at two opposite sides of the stent body 1 and are in a free state (that is, both ends of the nitinol wire can be freely pulled). Therefore, when the airway stent needs to be recovered from the airway of a human body, after one free end of the nickel-titanium wire is clamped by a general catheter forceps with a sheath tube, the whole stent can be pulled into a long wire shape from a straight tube shape and pulled into a catheter to complete recovery, as shown in figure 4, the structure schematic diagram of the stretched single nickel-titanium memory alloy wire is shown, the airway tissue is not damaged, and the recovery success rate is improved.
In the manufacturing process of the full-film-covered airway stent 10, firstly, an inner film 21 is covered on a mandrel, after a colloid is coated on the film, a nickel-titanium memory alloy wire is wound on the inner film 21 according to the winding direction shown by the dotted line in fig. 1 and fig. 2 to form a porous tubular stent main body 1, then, an outer film 22 is continuously covered on the outer side of the stent main body 1, the inner film 21 and the outer film 22 are tightly pressed together by adopting a hot pressing process, as mentioned above, the two films at the pore position of the stent main body 1 are directly and tightly combined, and the state that the stent main body 1 is tightly clamped between the two films is formed.
It should be understood that the thermal compression bond between the inner membrane 21 and the outer membrane 22 should be configured such that the single nitinol wire is not deformed or frayed by physical contact with the body tissue when the airway stent 10 is placed in a human airway.
The membrane structure 2, i.e. the inner membrane 21 and the outer membrane 22, may be made of a polytetrafluoroethylene material or a silicone rubber. Preferably, the membrane structure is made of a polytetrafluoroethylene material.
In a preferred embodiment of the present invention, at least one anti-slip protrusion is disposed on the outer surface of the outer film 22, so that the airway stent 10 is prevented from slipping in the human airway and affecting the use effect. The anti-slip protrusions can be rectangular protrusions which can play a role of bidirectional anti-slip, and the anti-slip protrusions can also be in other shapes, and the shapes and the density of the anti-slip protrusions can be changed according to the airway condition of a patient in customization.
In another preferred embodiment, in order to further reduce the irritation of the stent body 1 to the airway tissue of the human body during use, the membrane structure 2 may be configured to have a length greater than the axial length of the stent body 1, preferably, the membrane structure 2 extends 1-1.5 mm beyond the stent body in the axial direction of the stent body. For example, the membrane structure 2 extends 1mm, 1.25mm or 1.5mm beyond the stent body.
The full-film-covered air passage bracket provided by the utility model has strong local and overall supporting performance, can fully solve the problem of local stenosis in the air passage without fatigue failure; the process structure of the full film covering greatly reduces the foreign body sensation and exclusive reaction of a patient, and simultaneously prevents the direct contact between the metal stent and human tissues; and can safely, effectively and simply realize the recovery after a certain period of putting.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (9)
1. A full-blown airway stent, comprising:
a stent body (1) having a porous tubular structure; and
the membrane structure (2) covers the support main body (1), the membrane structure (2) comprises an inner layer membrane (21) and an outer layer membrane (22), wherein the inner layer membrane (21) covers the inner wall of the support main body (1), and the outer layer membrane (22) covers the outer wall of the support main body (1).
2. The full-film airway stent according to claim 1, wherein the stent main body (1) is formed by winding and weaving a nickel-titanium memory alloy wire.
3. The full-coated airway stent according to claim 2, wherein the stent main body (1) is formed by winding and weaving a single nickel-titanium memory alloy wire, and two ends of the single nickel-titanium memory alloy wire are in a free state.
4. The full-laminated airway stent according to any one of claims 1 to 3, characterized in that a thermocompression bonding layer is present between the inner layer membrane (21) and the outer layer membrane (22).
5. A full-coated airway stent according to any of claims 1 to 3, characterized in that the membrane structure (2) is made of polytetrafluoroethylene.
6. A full-skinned airway stent according to any of claims 1 to 3, characterized in that the membrane structure (2) is made of silicone rubber.
7. The full-coated airway stent according to any one of claims 1 to 3, characterized in that the outer surface of the outer membrane (22) is provided with anti-slip protrusions.
8. The full-skinned airway stent of claim 7 wherein the non-slip projections are rectangular in configuration.
9. A full-skinned airway stent according to any of claims 1 to 3, characterized in that the membrane structure (2) exceeds the stent body (1) by 1-1.5 mm in the axial direction of the stent body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020925149.1U CN213098551U (en) | 2020-05-27 | 2020-05-27 | Full-film-coated airway stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020925149.1U CN213098551U (en) | 2020-05-27 | 2020-05-27 | Full-film-coated airway stent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213098551U true CN213098551U (en) | 2021-05-04 |
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ID=75669333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020925149.1U Active CN213098551U (en) | 2020-05-27 | 2020-05-27 | Full-film-coated airway stent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213098551U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114452033A (en) * | 2022-04-13 | 2022-05-10 | 深圳市库珀科技发展有限公司 | Ureteral stent and its testing device |
| CN114701104A (en) * | 2022-04-29 | 2022-07-05 | 深圳市库珀科技发展有限公司 | Stent graft and monofilament press-in device |
-
2020
- 2020-05-27 CN CN202020925149.1U patent/CN213098551U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114452033A (en) * | 2022-04-13 | 2022-05-10 | 深圳市库珀科技发展有限公司 | Ureteral stent and its testing device |
| CN114452033B (en) * | 2022-04-13 | 2022-07-01 | 深圳市库珀科技发展有限公司 | Ureteral stent and its testing device |
| CN114701104A (en) * | 2022-04-29 | 2022-07-05 | 深圳市库珀科技发展有限公司 | Stent graft and monofilament press-in device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 100094 101-1154, 1st floor, building 2, 103 Beiqing Road, Haidian District, Beijing Patentee after: Beijing Ailin Medical Technology Co.,Ltd. Address before: 101300 Room 501, building 13, yard 12, Juyuan Middle Road, Mapo Town, Shunyi District, Beijing Patentee before: BEIJING AILIN MEDICAL TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address |