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medical stent

A medical and rigid part technology, applied in the field of medical stents, can solve problems such as narrowing of stent pipelines and technical difficulties in holding pipelines

Active Publication Date: 2016-08-24
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The channel in which the stent is indwelling for a constant period becomes narrow and it becomes technically difficult to handle the operation in the channel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0071] Such as figure 1 with figure 2 As shown, the stent 1 (medical stent) of this embodiment includes a main body 10 having a first rigid portion 20 and a second rigid portion 30 and wings (locking members) 40 . The first rigid part 20 and the second rigid part 30 are formed in a tubular shape along the longitudinal axis C1. The wing 40 has an extension portion 41 extending outward in the radial direction of the main body 10 , and a base end portion 42 connected to the extension portion 41 and fixed to the second rigid portion 30 .

[0072] The first rigid part 20 has a tubular first resin part 21 and a coil (first reinforcement part) 22 fixedly attached to the first resin part 21 .

[0073] The first resin part 21 includes a distal end portion of a tubular outer layer 24 and a distal end portion of a tubular inner layer 25 formed coaxially with the outer layer 24 on the inner peripheral side of the outer layer 24 .

[0074] The outer layer 24 is formed of elastic, flex...

no. 2 approach

[0118] Below, refer to Figure 9 to Figure 26 A second embodiment of the stent of the present invention will be described. In addition, in all the following drawings, in order to make the drawings easy to see, the thicknesses and dimensional ratios of the respective constituent elements are appropriately changed and shown.

[0119] Such as Figure 9 with Figure 10 As shown, the stent 101 (medical stent) of this embodiment includes a main body 110 having a first rigid portion 120 and a second rigid portion 130 and wings (locking members) 140 . The main body 110 has a first rigid part 120 and a second rigid part 130 formed in a tubular shape along the longitudinal axis C101. The wing 140 has an extension portion 141 extending radially outward of the main body 110 and a base end portion 142 connected to the extension portion 141 and fixed to the second rigid portion 130 .

[0120] The first rigid part 120 has a first resin part 121 and a coil (first reinforcing part) 122 . ...

no. 3 approach

[0164] Next, refer to Figure 18 ~ Figure 22 The third embodiment of the present invention will be described, and the same parts as those in the above-mentioned embodiment will be assigned the same reference numerals and their description will be omitted, and only the differences will be described.

[0165] Such as Figure 18 As shown, the stent 102 (medical stent) of the present embodiment has a plurality of rod-shaped bodies (second reinforcing parts) 161 instead of the reinforcing plate 132 of the stent 101 of the second embodiment.

[0166] Each rod-shaped body 161 is formed in a cylindrical shape (rod shape) extending in a direction along the longitudinal axis C101. The rod-shaped body 161 can be formed of the same material as the reinforcing plate 132 . Each rod-shaped body 161 is provided in a region R105 at a position not overlapping with the wing 140 in the circumferential direction of the second resin portion 131 when viewed from a direction along the longitudinal ...

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Abstract

A medical stent (1) includes a main body (10) having a first rigid portion (20) and a second rigid portion (30). The first rigid portion (20) is formed in a tubular shape along a longitudinal axis and has a radial diameter. The upward compressive force has a predetermined rigidity, and the second rigid portion (30) has a lower rigidity than the first rigid portion (20) and is substantially the same as the base end portion of the first rigid portion (20). axially connected and formed in a tubular shape along the length axis; and a locking member (40), which is provided on the second rigid part in order to lock with the tissue, along the second rigid part. The approximate center position in the direction of the longitudinal axis has a base end portion (42) connected to the second rigid portion (30) and a radial direction outward from the base end portion (42) to the main body (10). Square extension (41).

Description

technical field [0001] The invention relates to a medical stent placed in the bile duct or the pancreatic duct. This application claims priority based on U.S. Provisional Application No. 61 / 774290, filed March 7, 2013 in the U.S. and U.S. Provisional Application No. 61 / 774302, filed March 7, 2013 in the U.S. Provisional Application, and combines both The content of is quoted here. Background technique [0002] Conventionally, medical stents (hereinafter also referred to as "stents") have been indwelled in order to dilate the narrowed portion formed in the bile duct or pancreatic duct and maintain a patent (Japanese: open storage) state. [0003] As the stent, for example, those described in Patent Document 1 or Patent Document 2 are known. The stent of Patent Document 1 includes: a coil (reinforcing portion) formed by winding a wire around an axis; an outer layer formed in a substantially tubular shape and provided on the outer peripheral side of the coil coaxially with th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/848
CPCA61F2002/041A61F2220/0016A61F2002/9528A61F2250/0018A61F2250/0029A61F2210/0076A61F2/94A61F2002/8483A61F2002/8486A61F2/04A61F2/848A61F2/95
Inventor 野村祐介山县敏博清川円
Owner OLYMPUS CORP