CN101569571A - Helical latch type biliary tract stent - Google Patents
Helical latch type biliary tract stent Download PDFInfo
- Publication number
- CN101569571A CN101569571A CNA2008100369491A CN200810036949A CN101569571A CN 101569571 A CN101569571 A CN 101569571A CN A2008100369491 A CNA2008100369491 A CN A2008100369491A CN 200810036949 A CN200810036949 A CN 200810036949A CN 101569571 A CN101569571 A CN 101569571A
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- biliary tract
- stent
- support
- latch type
- helical latch
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Abstract
The invention discloses a helical latch type biliary tract stent produced by winding nickel-titanium alloy strips with S-shaped cross sections after memory training into the form of a helix, and latching each helix with adjacent helixes. The helical latch type biliary tract stent combines the features of the metal net-like stent and the macromolecule tubular stent, further improves the stent curative effect on patients with biliary tract neoplasm, and prolongs the lifetime of the patients.
Description
Technical field
The present invention relates to a kind of biliary tract endoscopic instruments, relate in particular to a kind of helical latch type biliary tract stent.
Background technology
In the clinical disease, biliary tract feel sick block many by cancer of biliary duct, carcinoma of gallbladder, hepatocarcinoma, carcinoma of head of pancreas, carcinoma of ampulla or other metastatic carcinomas to due to the compressing of bile duct, cholestasis causes liver function damage in liver, pernicious complication such as biliary tract infection, this type of patient often health whole body situation is poor, and success rate of operation is low.For such situation, adopt palliative therapy method at present clinically, to reach the unobstructed purpose that keeps biliary tract over a period to come at narrow section biliary tract implant frame.
Present support roughly is divided into metal net shaped support and macromolecule cast support.Wherein metal net shaped support expansion back diameter can reach 7～10mm, keep the unobstructed effect of biliary tract good long with the time, can merge with the tissue of periphery after but its network structure causes it to implant and can't take out, when taking place to stop up, support can implant a new support again at former backing positions, therefore the internal diameter of biliary tract can be irreversible more and more littler, price is high in addition, is roughly 10 times of polymeric stent; Polymeric stent can not be expanded, its internal diameter is 2～3mm, keep the unobstructed time of biliary tract short, obstruction of stent just takes place in a short time after often implanting, but its structures shape its can in biliary tract, take out, often need constantly more to renew support so implant the patient of polymeric stent, to keep the unobstructed property of biliary tract.
For above-mentioned two kinds of supports, it cuts both ways, thus with both advantages together, design novel support, it comprises: 1, can be expanded to bigger diameter, increase the unimpeded time of support; 2, tubular structure prevents that support and biliary tract tissue from merging and can't take out; 3, less axial shrinkage rate in the support process of expansion reduces support implant surgery difficulty; 4, provide higher mechanical strength, prevent oncothlipsis and cause that support subsides etc., can further improve tumor of biliary tract patient's stent in the treatment effect undoubtedly, increase survival time of patients, improve patient's life quality simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of helical latch type biliary tract stent.
In order to achieve the above object, the technical solution used in the present invention is:
Support is a helical form.
Described support is by the nickel titanium alloy through memory training, and material section is " S " type, and material is according to clockwise or counterclockwise coiled.
The mutual snap close in cross section of adjacent two spiral utilizations " S " type in the described spiral.
The two ends of described support are respectively equipped with right angle clamp and curved clamp.
The beneficial effect that the present invention has is:
Combine the characteristics of metal net shaped support and macromolecule tubulose support, it is reached: 1, can be expanded to bigger diameter; 2, tubular structure; 3, in the support process of expansion, less axial shrinkage rate; 4, provide higher tube wall strength.
Description of drawings
Fig. 1 is the axonometric chart of a direction of the present invention;
Fig. 2 is the axonometric chart of another direction of the present invention;
Fig. 3 is the profile of coil material of the present invention;
Sectional side elevation when Fig. 4 is a contraction state of the present invention;
Adjacent helical latch situation sketch map when Fig. 5 is a contraction state of the present invention;
Sectional side elevation when Fig. 6 is an expansion state of the present invention;
Adjacent helical latch situation sketch map when Fig. 7 is an expansion state of the present invention;
Among the figure: 1, support; 2, right angle clamp; 3, curved clamp; 4, " S " type section material; 5, stuck point.
The specific embodiment
As Fig. 1, Fig. 2, shown in Figure 3, it is the nickel titanium alloy through memory training of " S " type that the present invention adopts the cross section, adopt certain device and device according to clockwise or counterclockwise coiled, the material of both helical ends carries out bending to be handled, one end forms right angle clamp 2, and the other end forms curved clamp 3.
As Fig. 4, shown in Figure 5, among the present invention, adjacent two spirals prevent that by the stuck point 5 mutual snap closes on " S " type section material 4 two adjacent spirals break away from.When support 1 was in contraction state, the diameter of support 1 was less relatively, and the stuck point of adjacent two spirals 5 is at a distance of farthest, thereby pitch is also minimum.
As Fig. 6, shown in Figure 7, because the effect of Ultimum Ti, when support 1 is in expansion state, support 1 expanded in diameter, axial length can shorten along with the expansion of diameter.But because pitch can become big gradually under the effect of memorial alloy, the distance of adjacent two stuck points 5 diminishes gradually, reaches maximum pitch until contact, thereby has offset the axial shrinkage of part.
When clinical practice, the support that will be in contraction state by paths such as choledochoscope, ERCP, PTC is positioned in the narrow biliary tract, discharge right angle clamp 2 and curved clamp 3 on the support, because it is the effect of Ultimum Ti, support are expanded voluntarily that narrow biliary tract support is big, on the other hand, because the snap action of adjacent spiral, make the no mesh in support 1 expansion back, can prevent that therefore tumor tissues from growing in the support, possibility can also be provided for the taking-up of support 1.
The above-mentioned specific embodiment is used for the present invention that explains, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.
Claims (4)
1. helical latch type biliary tract stent, it is characterized in that: support is a helical form.
2. a kind of helical latch type biliary tract stent according to claim 1 is characterized in that: described support is by the nickel titanium alloy through memory training, and material section is " S " type, and material is according to clockwise or counterclockwise coiled.
3. a kind of helical latch type biliary tract stent according to claim 1 is characterized in that: the mutual snap close in cross section of adjacent two spiral utilizations " S " type in the described spiral.
4. a kind of helical latch type biliary tract stent according to claim 1 is characterized in that: the two ends of described support are respectively equipped with right angle clamp and curved clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100369491A CN101569571A (en) | 2008-05-04 | 2008-05-04 | Helical latch type biliary tract stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100369491A CN101569571A (en) | 2008-05-04 | 2008-05-04 | Helical latch type biliary tract stent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101569571A true CN101569571A (en) | 2009-11-04 |
Family
ID=41229146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100369491A Pending CN101569571A (en) | 2008-05-04 | 2008-05-04 | Helical latch type biliary tract stent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101569571A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106420127A (en) * | 2016-10-15 | 2017-02-22 | 韩新巍 | Fully fitting esophageal stent complying with esophageal peristalsis |
| CN109464229A (en) * | 2018-12-29 | 2019-03-15 | 韩新巍 | A kind of biliary tract spiral particle bracket and stent delivery catheter are set with |
-
2008
- 2008-05-04 CN CNA2008100369491A patent/CN101569571A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106420127A (en) * | 2016-10-15 | 2017-02-22 | 韩新巍 | Fully fitting esophageal stent complying with esophageal peristalsis |
| CN106420127B (en) * | 2016-10-15 | 2019-03-15 | 郑州大学第一附属医院 | One kind complying with esophageal peristalsis and is bonded Esophageal Stent entirely |
| CN109464229A (en) * | 2018-12-29 | 2019-03-15 | 韩新巍 | A kind of biliary tract spiral particle bracket and stent delivery catheter are set with |
| CN109464229B (en) * | 2018-12-29 | 2024-01-05 | 韩新巍 | Biliary tract spiral particle stent and stent conveying catheter set |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20091104 |