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Leading-end tip for catheter, and stent delivery device

A transmission device and catheter technology, applied in the direction of catheters, stents, etc., to achieve the effect of reducing irritation

Active Publication Date: 2019-10-18
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Contents of the invention

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  • Leading-end tip for catheter, and stent delivery device
  • Leading-end tip for catheter, and stent delivery device
  • Leading-end tip for catheter, and stent delivery device

Examples

Experimental program
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Effect test

no. 1 approach

[0036] Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. In this embodiment, the case of indwelling a covered self-expanding stent in transgastric and transhepatic biliary drainage (EUS-BD) under the guidance of ultrasonic endoscope will be described as an example. and intrahepatic bile ducts. However, the present invention is not limited to the bypass connection between the stomach and the intrahepatic bile duct, and can be widely applied to bypass connections between the duodenum and the common bile duct, etc., or between hollow organs and other hollow organs. Condition. In addition, the present invention is not limited to the case of indwelling a stent in this way, and can be applied, for example, to bile duct drainage through the duodenal papilla (when a stent is placed in a narrow part of the common bile duct) and in a lumen other than the common bile duct. When a stent is placed in a narrow part.

[0037] ...

no. 2 approach

[0081] Figure 2B The distal head 10A of the present embodiment shown has the same structure and effects as those of the first embodiment except for the points shown below, and the description of the common parts will be omitted, and the common parts will be marked with a common symbol in the figure. Part reference number. Such as Figure 2B As shown, the tip 10A has a first part 100A and a second part 200A.

[0082] The first part 100A is identical to the first part 100 of the first embodiment except that it has a distal taper 140A instead of the distal taper 140 . In more detail, the distal taper 140 has an anchoring protrusion 141A. The second tapered surface 144A is formed to have an axial length shorter than that of the second tapered surface 144 in the first embodiment.

[0083] The anchoring protrusion 141A is formed to have an axial length shorter than that of the anchoring protrusion 141 in the first embodiment. The distal surface 142A formed at the distal end of...

no. 3 approach

[0089] Figure 2C The distal head 10B of the present embodiment shown has the same structure and effects as those of the above-mentioned second embodiment except for the following points, and the description of the common parts will be omitted, and the common parts will be marked as common in the figure. part reference signs. Such as Figure 2C As shown, the tip 10B has a first part 100B and a second part 200B.

[0090] The second member 200B is the same as the second member 200A in the second embodiment except that it has a base end portion 220B instead of the base end portion 220A. In more detail, the base end portion 220B is formed such that its axial length is longer on the proximal side than the axial length of the base end portion 220 in the second embodiment, and an anchoring protrusion is formed at the proximal end portion thereof. Section 222B.

[0091] The anchor convex portion 222B is formed in a convex shape protruding radially outward so as to be engageable wi...

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Abstract

To provide a leading-end tip for a catheter, having exceptional piercing properties. A leading-end tip 10 for a catheter has a first member 100 that is connected to the distal end of a catheter 2, anda second member 200 that is fixed so as to protrude in the axial direction from the distal-end surface of the first member 100. The material of the second member 200 is harder than the material of the first member 100, and formed in the first member 100 and / or the second member 200 is at least one anchoring protrusion 141 for engaging with the other of the first member 100 and the second member 200.

Description

technical field [0001] The present invention relates to a distal tip and a stent transfer device provided at the distal end of a catheter, and in particular to a catheter distal tip and a stent transfer device which facilitate insertion of a catheter into a body. Background technique [0002] In recent years, in the cases of unresectable malignant biliary stricture or obstruction, the following reports are common: in cases where bile duct drainage is required but the duodenal papillary approach is not possible, transduodenal duodenal catheterization under the guidance of ultrasonic endoscope is carried out. Dental (or transgastric and transhepatic) biliary drainage (EUS-BD). EUS-BD refers to a procedure in which an ultrasonic endoscope is inserted into the duodenum (or stomach), and the common bile duct ( or intrahepatic bile duct), after inserting the guide wire into the bile duct through the puncture hole, insert and indwell a tubular object along the guide wire, which be...

Claims

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Application Information

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IPC IPC(8): A61M25/00A61F2/95
CPCA61F2/95A61M25/00
Inventor 西冈亮子
Owner ZEON CORP
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