CN112220594B - Cone spiral valve anti-reflux biliary tract stent - Google Patents
Cone spiral valve anti-reflux biliary tract stent Download PDFInfo
- Publication number
- CN112220594B CN112220594B CN202011087670.3A CN202011087670A CN112220594B CN 112220594 B CN112220594 B CN 112220594B CN 202011087670 A CN202011087670 A CN 202011087670A CN 112220594 B CN112220594 B CN 112220594B
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- spiral
- valve
- stent
- conical
- spiral valve
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- 210000003445 biliary tract Anatomy 0.000 title claims abstract description 32
- 230000000151 anti-reflux effect Effects 0.000 title claims abstract description 17
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 5
- 229920002529 medical grade silicone Polymers 0.000 claims description 2
- 239000004945 silicone rubber Substances 0.000 claims description 2
- 210000000941 bile Anatomy 0.000 abstract description 8
- 238000010992 reflux Methods 0.000 description 8
- 230000002183 duodenal effect Effects 0.000 description 6
- 230000000968 intestinal effect Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 229920002379 silicone rubber Polymers 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 2
- 206010061876 Obstruction Diseases 0.000 description 2
- 210000003484 anatomy Anatomy 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 208000003167 cholangitis Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000002496 gastric effect Effects 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 210000004185 liver Anatomy 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
- 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
- OFCNXPDARWKPPY-UHFFFAOYSA-N allopurinol Chemical compound OC1=NC=NC2=C1C=NN2 OFCNXPDARWKPPY-UHFFFAOYSA-N 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
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000001198 duodenum Anatomy 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
- 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
- 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
- 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
- 230000002829 reductive effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
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
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
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 supporting rings and cone-shaped spiral valves which are coaxially arranged, the supporting rings are continuous broken line-shaped ring frames, broken line parts of the supporting rings are provided with wave crests and wave troughs with equal height and are positioned on the circumference of the supporting rings, the broken line parts of the supporting rings correspond to each other, connecting ribs are uniformly distributed between the axially adjacent supporting rings in the circumferential direction and are fixedly connected with each other, and the connecting ribs are positioned between the wave crests or the wave troughs of the adjacent supporting rings; the conical spiral valve is arranged in a supporting ring at one end of the support body, a spiral rib is fixedly arranged on a connecting rib at the inner side of the supporting ring, the bottom layer spiral of the conical spiral valve is fixed with the spiral rib, and after being compressed and tightly attached, each layer spiral of the conical spiral valve can seal an opening of the valve. The invention aims to provide a biliary tract stent with smooth bile drainage and good anti-reflux effect.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a conical spiral valve anti-reflux biliary tract stent.
Background
Liver and gall system diseases are one of the common diseases which seriously threaten the life and health of human beings at present, and have the characteristics of high morbidity and mortality, multiple complications and the like. Clinically common diseases of liver and gall systems such as gall bladder cancer, pancreatic cancer, liver cancer, ampulla tumor and the like often occur along with malignant biliary tract obstruction at the far end, so that bile drainage is not smooth, and then complications such as obstructive jaundice and the like are caused. On the premise that the tumor cannot be resected by operation, the implantation of the biliary tract stent by the gastrointestinal endoscope becomes a relatively mature palliative treatment method for relieving malignant obstruction of biliary tract.
The stent, after being implanted into the biliary tract through the sphincter of Oddi, can cause the protection function of the sphincter of Oddi to be disabled. When the internal pressure of the duodenum rises, the contents of the duodenal cavity can flow back into the biliary tract, namely intestinal-biliary reflux occurs, and further complications such as biliary retrograde infection, cholangitis and the like are caused. Related clinical researches show that the occurrence rate of the cholangitis is up to 22% after the self-expanding metal biliary stent is implanted into biliary tract, and the life quality of patients is seriously affected. In addition, intestinal reflux is also a significant cause of secondary blockage of stents. The anti-reflux biliary stent is a relatively effective treatment means for inhibiting intestinal and biliary reflux, prolonging the patency period of the stent, reducing the incidence rate of complications and improving the survival quality of patients at present. The current research on the anti-reflux biliary tract stent mainly depends on the empirical design and clinical experiments of doctors, so that the research method is single, the achievement is limited, and the treatment effect is difficult to ensure. Therefore, there is a need for a biliary stent with smooth bile drainage and good anti-reflux effect.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and aims to provide a biliary tract stent with smooth bile drainage and good anti-reflux effect.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
The utility model provides a cone spiral valve anti-reflux biliary tract stent, includes the support main part, the support main part includes coaxial arrangement's supporting ring and cone spiral valve, and the supporting ring is continuous broken line shape ring frame, and its broken line portion all has the crest and the trough of equiheight and is located the circumference of supporting ring, and the broken line portion of each supporting ring corresponds each other, and the fixedly connected with connecting rib in circumference equipartition between the axially adjacent supporting ring, connecting rib all is located between the crest or the trough of adjacent supporting ring; the conical spiral valve is arranged in a supporting ring at one end of the support body, a spiral rib is fixedly arranged on a connecting rib at the inner side of the supporting ring, the bottom layer spiral of the conical spiral valve is fixed with the spiral rib, and after being compressed and tightly attached, each layer spiral of the conical spiral valve can seal an opening of the valve.
Further, each spiral of the cone-shaped spiral valve can cover the opening edge of the next spiral.
Further, the conical spiral valve is composed of medical silicone rubber.
Further, the curved surface of the spiral rib is in spiral consistency 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 line.
Furthermore, 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.
Further, the supporting 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 in the invention are both composed of nickel-titanium alloy, have a shape memory function, have better supportability and flexibility, realize reliable supportability on the biliary tract blockage position so as to ensure the smoothness of the biliary tract blockage position, adapt to biliary tract bending anatomical structures, reduce the uncomfortable feeling of a bracket user and improve the life quality of patients. After the biliary tract stent is implanted into the biliary tract blockage part of a patient, the main body structure of the stent realizes the supporting and dredging effects on the blocked biliary tract. When the gall bladder contracts, the conical spiral valve keeps an opening state under the action of biliary tract pressure and bile flow, so that smooth drainage of bile is realized; when intestinal liner reflux occurs, the conical spiral valve is compressed and closed under the action of duodenal cavity pressure, so that the reflux of duodenal contents can be effectively prevented, the problems of stent re-blockage and the like caused by intestinal liner reflux can be effectively prevented, and the stent patency time can be further prolonged.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a conical spiral valve according to the present invention;
FIG. 3 is a schematic view of the structure of the tapered spiral valve of the present invention in an open state;
fig. 4 is a schematic view of the structure of the conical spiral valve of the present invention in a closed state.
Reference numerals illustrate:
1-bracket main body, 2-cone spiral valve, 3-medical suture, 11-support ring, 12-connecting rib and 13-spiral rib.
Detailed Description
The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1 to 4, an anti-reflux biliary tract stent of a conical spiral valve comprises a stent main body 1, wherein the stent main body 1 comprises supporting rings 11 and conical spiral valves 2 which are coaxially arranged, the supporting rings 11 are continuous zigzag ring frames, the zigzag parts of the supporting rings 11 are provided with equal-height wave crests and wave troughs and are positioned on the circumference of the supporting rings 11, the zigzag parts of the supporting rings 11 correspond to each other, connecting ribs 12 are fixedly connected between the axially adjacent supporting rings 11 uniformly distributed in the circumferential direction, the connecting ribs 12 are positioned between the wave crests or the wave troughs of the adjacent supporting rings 11, four connecting ribs 12 are arranged between the supporting rings 11, the fixed positions of the connecting ribs 12 are staggered with each other in the axial direction of the stent main body 1, and the supporting rings 11 and the connecting ribs 12 are all composed of nickel-titanium alloy; the conical spiral valve 2 is arranged in a supporting ring 11 at one end of the bracket main body 1, a spiral rib 13 is fixedly arranged on a connecting rib 12 at the inner side of the supporting ring 11, the bottom layer spiral of the conical spiral valve 2 is fixed with the spiral rib 13, and after each layer spiral of the conical spiral valve 2 is compressed and tightly attached, the opening of the valve can be plugged.
The cone-shaped spiral valve 2 is made of medical silicon rubber, the elastic solid silicon rubber has the best elasticity, the cone-shaped spiral valve 2 has higher elasticity and can be compressed after being pressed in biliary tract, the edges of each layer of spiral are larger than the opening of the next layer of spiral, and 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 spiral rib 13 is convenient to fix the spiral rib and the bottom side spiral of the conical spiral valve 2, the spiral rib 13 is stitched with the bottom side of the conical spiral valve 2 through the medical suture line 3, the medical suture line 3 is not easy to corrode in a human body, and the safety is high.
The application method of the invention comprises the following steps:
The stent body 1 is implanted in the biliary tract blocking position of a patient under the gastrointestinal endoscope, and one end of the stent body 1 with the conical spiral valve 2 faces the duodenal end. The support rings 11 and the connecting ribs 12 are made of nickel-titanium alloy, the shape memory function is achieved, the fixing positions of the connecting ribs 12 are staggered in the axial direction of the support main body 1, the connecting ribs 12 between the support rings 11 are staggered, the support main body 1 can adapt to biliary tract bending anatomical structures conveniently, the flexible deformation of the support main body 1 is limited after the connecting ribs 12 are continuously connected together, and the uncomfortable feeling of a support user is reduced. The stent main body 1 is compressed into the delivery device in vitro, the conical spiral valve 2 is wound on the delivery device, the stent main body 1 and the conical spiral valve 2 are released and unfolded in the biliary tract along with the implantation of the delivery device into the biliary tract blocking position of a patient, and the delivery tube is withdrawn. The bracket main body 1 supports and dredges biliary tract, and the conical spiral valve 2 can realize smooth drainage of bile and reliable anti-reflux function.
The cone-shaped spiral valve 2 is made of medical silicon rubber and is easy to deform under the actions of biliary tract pressure and duodenal pressure. When the forward flow 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 intestinal liner reflux pressure is increased, the conical spiral valve 2 is compressed, each layer of spiral sequentially compresses the next layer of spiral until each layer of spiral is attached, and the opening of the conical spiral valve 2 is blocked, so that the reflux of duodenal contents into the biliary tract can be effectively prevented.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (5)
1. An anti-reflux biliary tract stent of a conical spiral valve, comprising a stent main body, and being characterized in that: the support body comprises support rings and conical spiral valves which are coaxially arranged, the support rings are continuous broken-line-shaped ring frames, broken 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 broken line parts of the support rings correspond to each other, connecting ribs are fixedly connected between the axially adjacent support rings 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 supporting ring at one end of the support body, a spiral rib is fixedly arranged on a connecting rib at the inner side of the supporting ring, a bottom spiral of the conical spiral valve is fixed with the spiral rib, each layer of spiral of the conical spiral valve can seal an opening of the valve after being compressed and tightly adhered, and each layer of spiral of the conical spiral valve can cover the edge of the opening of the next layer of spiral.
2. The tapered spiral valve anti-reflux biliary stent of claim 1, wherein: the conical spiral valve is composed of medical silicone rubber.
3. The tapered spiral valve anti-reflux biliary stent of claim 1, wherein: the curved surface of the spiral rib is in spiral conformity with the bottom side of the conical spiral valve, and the spiral rib is sutured with the bottom side of the conical spiral valve through a medical suture line.
4. The tapered spiral valve anti-reflux 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.
5. The tapered spiral valve anti-reflux biliary stent of claim 4, wherein: the supporting ring and the connecting ribs are both composed of nickel-titanium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011087670.3A CN112220594B (en) | 2020-10-14 | 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 | 2020-10-14 | Cone spiral valve anti-reflux biliary tract stent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112220594A CN112220594A (en) | 2021-01-15 |
| CN112220594B true CN112220594B (en) | 2024-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011087670.3A Active CN112220594B (en) | 2020-10-14 | 2020-10-14 | Cone spiral valve anti-reflux biliary tract stent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112220594B (en) |
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| Publication number | Publication date |
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| CN112220594A (en) | 2021-01-15 |
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