Anti-regurgitation biliary stent

A technology of biliary tract and stent body, which is applied in the field of medical devices, can solve problems such as unreported, inability to be applied clinically, difficulty in stent release, etc., and achieve the effects of convenient use, reduction of biliary-enteric reflux, and improvement of quality of life

Active Publication Date: 2014-01-15
SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the existing anti-reflux biliary plastic stent has a very long windsock-like anti-reflux structure attached to the end of the stent. This kind of stent has been proved by foreign scholars to have a certain anti-reflux effect, but in practice There are difficulties in stent release during operation, so it has not been able to be applied clinically
[0004] Chinese patent document CN200810036949.1, application date 2008.05.04 discloses a screw-lock type biliary stent, Chinese patent document CN201010116503.7, application date 2010.02.12 discloses a recyclable biliary stent, but currently there is no Biliary tract reflux, simple structure, easy to use, suitable for clinical application of biliary plastic stent has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Please refer to figure 1 , figure 1 It is a schematic structural diagram of the anti-reflux biliary stent of the present invention. The biliary stent is provided with a stent body 1, the stent body 1 is a tubular structure, the head of the stent body 1 is provided with a head-end flank 2, and the tail is provided with a tail-end flank 3. The head-end flanks 2 and the tail-end flanks 3 are hung upside down on the bracket body 1 in a hook shape. The rear end of the bracket body 1 is further provided with a groove 4 (not shown in the figure), and the groove 4 surrounds the bracket body 1 for a circle, that is, a ring shape. An anti-reflux valve 5 is assembled in the groove 4, and the anti-reflux valve 5 is in the shape of a nipple.

[0030] Please refer to figure 2 , figure 2 It is the disassembly and assembly diagram of the anti-reflux biliary stent anti-reflux valve and stent body of the present invention. The cross section of the groove 4 is arc-shaped, and the ...

Embodiment 2

[0033] The anti-reflux biliary stent of this embodiment is the same as the embodiment, the difference is only that the shape of the release slit 54 is different. Please refer to Figure 4 , Figure 4 is another embodiment of an anti-reflux valve pocket. The release opening 54 is in the shape of a "cross".

[0034] For Example 1-2, it should be noted that: the present invention is based on the original biliary stent, a groove 4 is added to the tail end of the stent body 1, an anti-reflux valve 5 is configured, and the anti-reflux valve 5 The fixing ring 53 is tightly combined; and the release slit 54 on the pouch 51 can ensure that the bile is temporarily stored in the pouch 51 when bile flows forward, so that the pressure in the bile duct is always greater than the pressure in the intestinal cavity; the spherical design makes the pouch 51 will not easily turn to the side of the bile duct due to increased intraluminal pressure; this improved design can effectively reduce the...

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Abstract

The invention relates to an anti-regurgitation biliary stent which is provided with a stent body and side wings. The biliary stent is further provided with an anti-regurgitation valve which is in a nipple shape and provided with a fixing ring, a cannula and a capsule bag with a releasing crack. The fixing ring coordinates with an annular groove in the tail end of the stent body to enable the anti-regurgitation valve to be fixed to the stent body. The cross section of the groove is in an arc shape, and the central angle of the groove is 180-240 degrees. The releasing crack is in a Y shape or a cross shape. Due to the fact that the anti-regurgitation valve is arranged on the biliary stent, and the spherical capsule bag with the releasing crack is arranged on the anti-regurgitation valve, the phenomena of biliary intestinal regurgitation and biliary tract infection can be reduced, the unobstructed period of the plastic biliary stent can be prolonged possibly, and the survival quality of patients is improved greatly; the junction between the anti-regurgitation valve and the stent body is firm, and the anti-regurgitation valve is not prone to loosening and disengaging; the whole biliary stent is simple in structure, convenient to use and suitable for being popularized in clinic.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an anti-reflux biliary stent. Background technique [0002] With the promotion of clinical application of endoscopic technology, more and more patients with unresectable biliary and pancreatic diseases choose endoscopic treatment as a palliative treatment option. Biliary tract plastic stenting is chosen by most patients and their families because of its low cost. However, recurrent biliary tract infection and short patency of plastic stents after stenting often trouble us. Studies have reported that the existence of biliary enteric reflux is one of the important reasons leading to the occurrence of the above phenomenon. [0003] At present, the existing anti-reflux biliary plastic stent has a very long windsock-like anti-reflux structure attached to the end of the stent. This kind of stent has been proved by foreign scholars to have a certain anti-reflux effect, but in p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/82
Inventor 王田田
Owner SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY
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