CN112220594A - Anti-regurgitation biliary tract stent of conical spiral valve - Google Patents
Anti-regurgitation biliary tract stent of conical spiral valve Download PDFInfo
- Publication number
- CN112220594A CN112220594A CN202011087670.3A CN202011087670A CN112220594A CN 112220594 A CN112220594 A CN 112220594A CN 202011087670 A CN202011087670 A CN 202011087670A CN 112220594 A CN112220594 A CN 112220594A
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- Prior art keywords
- spiral
- valve
- support
- support rings
- conical
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- 210000003445 biliary tract Anatomy 0.000 title claims abstract description 35
- 206010067171 Regurgitation Diseases 0.000 title claims description 10
- 210000000941 bile Anatomy 0.000 claims abstract description 9
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 5
- 229920002379 silicone rubber Polymers 0.000 claims description 5
- 230000000151 anti-reflux effect Effects 0.000 abstract description 9
- 230000000968 intestinal effect Effects 0.000 description 8
- 238000010992 reflux Methods 0.000 description 5
- 230000002183 duodenal effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 210000001198 duodenum Anatomy 0.000 description 3
- 210000001035 gastrointestinal tract Anatomy 0.000 description 3
- 238000002513 implantation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 206010028980 Neoplasm Diseases 0.000 description 2
- 206010061876 Obstruction Diseases 0.000 description 2
- 210000003484 anatomy Anatomy 0.000 description 2
- 208000003167 cholangitis Diseases 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000002496 gastric effect Effects 0.000 description 2
- 230000003211 malignant effect Effects 0.000 description 2
- 230000006386 memory function Effects 0.000 description 2
- 210000004514 sphincter of oddi Anatomy 0.000 description 2
- 230000004083 survival effect Effects 0.000 description 2
- 208000022072 Gallbladder Neoplasms Diseases 0.000 description 1
- 206010023129 Jaundice cholestatic Diseases 0.000 description 1
- 201000005267 Obstructive Jaundice Diseases 0.000 description 1
- 206010061902 Pancreatic neoplasm Diseases 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000003708 ampul Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 208000010643 digestive system disease Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000000232 gallbladder Anatomy 0.000 description 1
- 201000010175 gallbladder cancer Diseases 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 201000007270 liver cancer Diseases 0.000 description 1
- 208000014018 liver neoplasm Diseases 0.000 description 1
- 208000015486 malignant pancreatic neoplasm Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000002638 palliative care Methods 0.000 description 1
- 201000002528 pancreatic cancer Diseases 0.000 description 1
- 208000008443 pancreatic carcinoma Diseases 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
Abstract
The invention discloses a cone-shaped spiral valve anti-reflux biliary tract stent, which comprises a stent main body, wherein the stent main body comprises support rings and a cone-shaped spiral valve which are coaxially arranged, the support rings are continuous fold-line-shaped ring frames, fold line parts of the support rings are provided with equal-height wave crests and wave troughs and are positioned on the circumference of the support rings, the fold line parts of the support rings are mutually corresponding, connecting ribs are fixedly connected between the axially adjacent support rings in the circumferential direction and are uniformly distributed in the circumferential direction, and the connecting ribs are positioned between the wave crests or the wave troughs of the adjacent support rings; the conical spiral valve is arranged in a support ring at one end of the support main body, a spiral rib is fixedly arranged on a connecting rib at the inner side of the support ring, a bottom layer spiral of the conical spiral valve is fixed with the spiral rib, and each layer of spiral of the conical spiral valve can block an opening of the valve after being compressed and attached tightly. The invention aims to provide a biliary tract stent which can smoothly drain bile and has good anti-reflux effect.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a cone-shaped spiral valve anti-reflux biliary tract stent.
Background
The diseases of the liver and gall system are one of the common diseases seriously threatening the life health of human at present, and have the characteristics of high morbidity and mortality, more complications and the like. Common clinical hepatobiliary diseases such as gallbladder cancer, pancreatic cancer, liver cancer, ampulla tumor and the like are often accompanied with distal malignant biliary obstruction, so that bile drainage is not smooth, and complications such as obstructive jaundice and the like are caused. On the premise that the tumor cannot be removed by operation, implantation of a biliary stent through a gastrointestinal endoscope becomes a more mature palliative treatment method for relieving malignant obstruction of the biliary tract.
Implantation of a stent through the sphincter of Oddi in the biliary tract can result in a failure of the sphincter of Oddi in its protective function. When the internal pressure of the duodenum rises, the contents in the intestinal cavity of the duodenum can reflux into the biliary tract, namely, the intestinal and biliary reflux occurs, and further complications such as biliary tract retrograde infection, cholangitis and the like are caused. Relevant clinical research shows that the incidence rate of cholangitis after the self-expanding metal biliary stent is implanted into the biliary tract is up to 22 percent, and the survival quality of patients is seriously influenced. In addition, reflux of the intestinal and biliary tracts is also an important cause of secondary blockage of the stent. The anti-reflux biliary tract stent is a comparatively effective treatment means for inhibiting the reflux of intestinal and biliary tracts, prolonging the patency of the stent, reducing the incidence rate of complications and improving the survival quality of patients at present. The current research aiming at the anti-reflux biliary tract stent mainly depends on the empirical design and clinical experiments of doctors, and not only has single research method and limited results, but also has difficult guarantee of the treatment effect. Therefore, a biliary stent with smooth bile drainage and good anti-reflux effect is needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a biliary tract stent with smooth bile drainage and good anti-reflux effect.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a cone-shaped spiral valve anti-reflux biliary tract stent comprises a stent main body, wherein the stent main body comprises support rings and cone-shaped spiral valves which are coaxially arranged, the support rings are continuous fold line-shaped ring frames, fold line parts of the support rings are provided with equal-height wave crests and wave troughs and are positioned on the circumference of the support rings, the fold line parts of the support rings are mutually corresponding, connecting ribs are fixedly connected and uniformly distributed in the circumferential direction between the axially adjacent support rings, and the connecting ribs are positioned between the wave crests or the wave troughs of the adjacent support rings; the conical spiral valve is arranged in a support ring at one end of the support main body, a spiral rib is fixedly arranged on a connecting rib at the inner side of the support ring, a bottom layer spiral of the conical spiral valve is fixed with the spiral rib, and each layer of spiral of the conical spiral valve can block an opening of the valve after being compressed and attached tightly.
Further, each layer of the spiral of the cone-shaped spiral valve can cover the opening edge of the next layer of the spiral.
Further, the conical spiral valve is made of medical silicon rubber.
Furthermore, the curved surface of the spiral rib is spirally consistent with the bottom side of the conical spiral valve, and the spiral rib is sewn with the bottom side of the conical spiral valve through a medical suture.
Furthermore, the number of the connecting ribs between the support rings is four, and the fixing positions of the connecting ribs are staggered in the axial direction of the support main body.
Further, the support ring and the connecting ribs are both made of nickel-titanium alloy.
Compared with the prior art, the invention has the following beneficial effects:
the support ring and the spiral ribs are both made of nickel-titanium alloy, have a shape memory function and good support property and flexibility, realize reliable support property on the blocked part of the biliary tract so as to ensure the smoothness of the blocked part of the biliary tract, and simultaneously adapt to the bent anatomical structure of the biliary tract, reduce the discomfort of a stent user and improve the life quality of a patient. After the biliary tract stent is implanted into a biliary tract blockage part of a patient, the main structure of the stent realizes the supporting and dredging functions on the blocked biliary tract. When the gallbladder contracts, the cone-shaped spiral valve keeps an opening state under the action of biliary tract pressure and bile flow, so that bile can be smoothly drained; when the intestinal and biliary regurgitation occurs, the conical spiral valve is compressed and closed under the action of the pressure of the duodenal intestinal cavity, so that the countercurrent of the duodenal contents can be effectively prevented, the problems of blockage of the support caused by the regurgitation of the intestinal and biliary and the like can be effectively prevented, and the unobstructed time of the support can be further prolonged.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a conical helical valve according to the present invention;
FIG. 3 is a schematic structural view of the open state of the conical helical valve of the present invention;
fig. 4 is a structural schematic diagram of the closed state of the conical spiral valve in the invention.
Description of reference numerals:
1-stent main body, 2-conical spiral valve, 3-medical suture, 11-support ring, 12-connecting rib and 13-spiral rib.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 4, a cone-shaped spiral valve anti-regurgitation biliary tract stent comprises a stent body 1, wherein the stent body 1 comprises support rings 11 and a cone-shaped spiral valve 2 which are coaxially arranged, the support rings 11 are continuous zigzag-shaped ring frames, the zigzag portions of the support rings have equal-height wave crests and wave troughs and are positioned on the circumference of the support rings 11, the zigzag portions of the support rings 11 correspond to each other, connecting ribs 12 are fixedly connected between the axially adjacent support rings 11 and are uniformly distributed in the circumferential direction, the connecting ribs 12 are positioned between the wave crests or the wave troughs of the adjacent support rings 11, the connecting ribs 12 between the support rings 11 are all provided with four, the fixing positions of the connecting ribs 12 are staggered from each other in the axial direction of the stent body 1, and the support rings 11 and the connecting ribs 12 are both made of nitinol; the conical spiral valve 2 is arranged in a support ring 11 at one end of the support main body 1, a spiral rib 13 is fixedly arranged on a connecting rib 12 at the inner side of the support ring 11, the bottom layer spiral of the conical spiral valve 2 is fixed with the spiral rib 13, and each layer of spiral of the conical spiral valve 2 can block the opening of the valve after being compressed and attached tightly.
Each layer of spiral of the cone-shaped spiral valve 2 can cover the opening edge of the next layer of spiral, the cone-shaped spiral valve 2 is made of medical silicon rubber, the elastic force of the elastic solid silicon rubber is optimal, the cone-shaped spiral valve 2 can have high elasticity and can be compressed after being pressed in a biliary tract, and when the edge of each layer of spiral is larger than the opening size of the next layer of spiral, the upper layer of spiral can easily block the opening of the next layer of spiral after being compressed.
The curved surface of the spiral rib 13 is consistent with the bottom side spiral of the conical spiral valve 2, so that the two are fixed conveniently, the spiral rib 13 cannot distort the bottom side spiral of the conical spiral valve 2, the spiral rib 13 is sewn with the bottom side of the conical spiral valve 2 through the medical suture 3, the medical suture 3 is not easy to corrode in a human body, and the safety is high.
The using method of the invention comprises the following steps:
the stent main body 1 is implanted into the position of the biliary tract blockage of a patient under a gastrointestinal endoscope, and one end of the stent main body 1 with the conical spiral valve 2 faces the duodenum end. The material of support ring 11 and splice bar 12 is nickel titanium alloy, has the shape memory function, and the fixed position of splice bar 12 staggers each other in the axial of support main part 1, lets the splice bar 12 between the support ring 11 stagger each other, and support main part 1 of can being convenient for is adapting to the crooked anatomical structure of biliary tract, avoids splice bar 12 continuous connection back restriction support main part 1's flexible deformation together, reduces support user's uncomfortable sense. The stent main body 1 is compressed in vitro into a conveying device, the cone-shaped spiral valve 2 is wound on the conveying device, the stent main body 1 and the cone-shaped spiral valve 2 are released and unfolded in the biliary tract along with the implantation of the conveying device into the biliary tract blocking position of a patient, and the conveying pipe is withdrawn. The main body 1 of the bracket supports and dredges the biliary tract, and the cone-shaped spiral valve 2 can realize the smooth drainage of bile and the reliable anti-reflux function.
The conical spiral valve 2 is made of medical silicon rubber and is easy to deform under the action of biliary tract pressure and duodenal pressure. When the downstream pressure of the biliary tract is increased, the conical spiral valve 2 is stretched to open the opening for further amplification, so that smooth drainage of bile can be realized; when the reflux pressure of the intestinal and biliary tracts is increased, the conical spiral valve 2 is compressed, each layer of spiral sequentially compresses the spiral of the next layer until each layer of spiral is attached, and the opening of the conical spiral valve 2 is blocked, so that the countercurrent flow of duodenal contents into the biliary tract can be effectively prevented.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. The utility model provides an anti bile flow biliary tract support of toper spiral valve, includes the support main part, its characterized in that: the support main body comprises support rings and conical spiral valves which are coaxially arranged, the support rings are continuous fold-line-shaped ring frames, fold line parts of the support rings are provided with wave crests and wave troughs which are equal in height and are positioned on the circumferences of the support rings, the fold line parts of the support rings correspond to each other, connecting ribs are fixedly connected between the axially adjacent support rings in the circumferential direction in an evenly distributed manner, and the connecting ribs are positioned between the wave crests or the wave troughs of the adjacent support rings; the conical spiral valve is arranged in a support ring at one end of the support main body, a spiral rib is fixedly arranged on a connecting rib at the inner side of the support ring, a bottom layer spiral of the conical spiral valve is fixed with the spiral rib, and each layer of spiral of the conical spiral valve can block an opening of the valve after being compressed and attached tightly.
2. The tapered helical valve anti-regurgitation biliary stent of claim 1, wherein: each layer of spiral of the conical spiral valve can cover the opening edge of the next layer of spiral.
3. The tapered helical valve anti-regurgitation biliary stent of claim 2, wherein: the conical spiral valve is made of medical silicon rubber.
4. The tapered helical valve anti-regurgitation biliary stent of claim 1, wherein: the curved surface of the spiral rib is consistent with the bottom side spiral of the cone-shaped spiral valve, and the spiral rib is sewed with the bottom side of the cone-shaped spiral valve through a medical suture.
5. The tapered helical valve anti-regurgitation biliary stent of claim 1, wherein: the connecting ribs between the support rings are four, and the fixing positions of the connecting ribs are staggered in the axial direction of the support main body.
6. The tapered helical valve anti-regurgitation biliary stent of claim 5, wherein: the support ring and the connecting ribs are both made of nickel-titanium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011087670.3A CN112220594B (en) | 2020-10-14 | Cone spiral valve anti-reflux biliary tract stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011087670.3A CN112220594B (en) | 2020-10-14 | Cone spiral valve anti-reflux biliary tract stent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112220594A true CN112220594A (en) | 2021-01-15 |
| CN112220594B CN112220594B (en) | 2024-04-26 |
Family
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070141099A1 (en) * | 2005-12-19 | 2007-06-21 | Buiser Marcia S | Coils |
| CN201200504Y (en) * | 2008-05-04 | 2009-03-04 | 中国人民解放军第二军医大学 | Anti-refulx bile duct metal stent with valve |
| CN204636628U (en) * | 2015-01-17 | 2015-09-16 | 浙江省台州恩泽医疗中心(集团) | Anti-reflux biliary tract plastic stent |
| CN205019200U (en) * | 2015-07-27 | 2016-02-10 | 上海纽脉医疗科技有限公司 | Artificial heart valve conveyor's outer tube moving mechanism |
| CN107307924A (en) * | 2012-12-19 | 2017-11-03 | W.L.戈尔及同仁股份有限公司 | Prosthetic valve, framework and leaflet and its method |
| CN207785318U (en) * | 2017-06-05 | 2018-08-31 | 先健科技(深圳)有限公司 | Medical overlay film frame |
| CN108601597A (en) * | 2016-02-26 | 2018-09-28 | 波士顿科学国际有限公司 | Cone-type spiral coil bronchus flap film |
| CN109303626A (en) * | 2013-11-22 | 2019-02-05 | 爱德华兹生命科学公司 | Aortic insuffciency prosthetic appliance and method |
| CN109475411A (en) * | 2016-05-10 | 2019-03-15 | 威廉·约瑟夫·德拉斯勒 | Two component bicuspid valve |
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070141099A1 (en) * | 2005-12-19 | 2007-06-21 | Buiser Marcia S | Coils |
| CN201200504Y (en) * | 2008-05-04 | 2009-03-04 | 中国人民解放军第二军医大学 | Anti-refulx bile duct metal stent with valve |
| CN107307924A (en) * | 2012-12-19 | 2017-11-03 | W.L.戈尔及同仁股份有限公司 | Prosthetic valve, framework and leaflet and its method |
| CN109303626A (en) * | 2013-11-22 | 2019-02-05 | 爱德华兹生命科学公司 | Aortic insuffciency prosthetic appliance and method |
| CN204636628U (en) * | 2015-01-17 | 2015-09-16 | 浙江省台州恩泽医疗中心(集团) | Anti-reflux biliary tract plastic stent |
| CN205019200U (en) * | 2015-07-27 | 2016-02-10 | 上海纽脉医疗科技有限公司 | Artificial heart valve conveyor's outer tube moving mechanism |
| CN108601597A (en) * | 2016-02-26 | 2018-09-28 | 波士顿科学国际有限公司 | Cone-type spiral coil bronchus flap film |
| CN109475411A (en) * | 2016-05-10 | 2019-03-15 | 威廉·约瑟夫·德拉斯勒 | Two component bicuspid valve |
| CN207785318U (en) * | 2017-06-05 | 2018-08-31 | 先健科技(深圳)有限公司 | Medical overlay film frame |
Non-Patent Citations (1)
| Title |
|---|
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