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Expansion catheter

A technique for dilating catheters and catheters, which is applied in the direction of catheters, dilators, balloon catheters, etc., can solve the problems of softness deterioration of dilators, passage of lesions, and dilators of internal passages that are harmful to health, and achieve excellent incision performance and Safety, effect of preventing contact between the blade tip and other objects

Inactive Publication Date: 2004-02-04
KANEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the folded shape of the expanding body is expanded to protect, the protection of the cutting edge is lost because the folded shape is not maintained after expansion, so there are problems of harming healthy internal passages, other organs used together, and the expanding body itself
In addition, in order to effectively maintain the expanded folded shape, the expander itself must be hardened to a certain extent, so there are problems such as deterioration of the flexibility of the expander portion, poor lesion passage, and restrictions on the expansion characteristics of the expander.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] On the cutting edge body 6 made of stainless steel, a support portion 7 (made of a polyamide elastomer having a Shore hardness of 40 D, having a distal end side) is connected. Figure 4 A cross-sectional shape with a length of 0.20 mm in the A direction and a length of 0.50 mm in the B direction) and a support portion 9 on the proximal side (composed of a polyamide elastomer having a Shore hardness of 72D, having Figure 4 The three cutting edge structures 4 having a length of 0.20 mm in the A direction and a cross-sectional shape of a length of 0.50 mm in the B direction) are mounted on a 0.80% (0.78% / MPa) pressure per atmosphere using expansion characteristics (flexibility). Polyamide elastomer expansion body 1 with a rated expansion diameter of 3.0 mm is placed on the tubular members 2 and 3 near the expansion body of the expansion catheter, so as to be made such as Figure 5 Shown is a high-speed exchange coronary dilation catheter with a distal portion of the cathe...

Embodiment 2

[0079] On the cutting edge body 6 made of stainless steel, a support portion 7 (made of a polyamide elastomer having a Shore hardness of 40 D, having a distal end side) is connected. Figure 4 A cross-sectional shape with a length of 0.20 mm in the A direction and a length of 0.50 mm in the B direction) and a support portion 9 on the proximal side (composed of a polyamide elastomer having a Shore hardness of 72D, having Figure 4 The three cutting edge structures 4 with a length of 0.20 mm in the A direction and a cross-sectional shape of a length of 0.50 mm in the B direction) are installed in a 1.25% (1.23% / MPa) expansion characteristic (flexibility) per 1 atmosphere of pressure. Polyamide elastomer expansion body 1 with a rated expansion diameter of 3.0 mm is placed on the tubular members 2 and 3 near the expansion body of the expansion catheter, so as to be made such as Figure 5 Shown is a high-speed exchange coronary dilation catheter with a distal portion of the cathete...

Embodiment 3

[0101] The cutting edge body 104 made of stainless steel is arranged with flat plate-shaped protective members made of a polyamide elastomer material having a Shore hardness of 40 D on both sides. The protective members 108 are parallel to the blade portion 107 of the cutting edge body 104 to protect The height of the member 108 in the circumferential direction is substantially the same as that of the blade tip, and three pieces are fixed to the cylindrical portion of the expansion body 101 made of polyamide elastomer with a rated expansion diameter of 3.0 mm with an adhesive 106 to make a Figure 11 Shown is a high-speed exchange coronary dilation catheter with a distal portion of the catheter. Since the expansion body 101 is initially folded at the periphery of the tubular member 102 passing through the interior during the treatment, it is not necessary to protect the cutting edge by the expansion body 101. Therefore, the expansion body 101 is provided in a folded state close...

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Abstract

An expansion catheter capable of freely controlling the expansion characteristics (compliance) of an expansion body (1), comprising a protective member (108) for protecting the blade portion of a cutter (104), wherein a cutter structural body (4) is fitted to tubular members (2, 3) near the expansion body (1), whereby excellent operability, particularly, excellent admission capability into a constrictive lesion and a bent lesion can be provided, protectiveness of the cutter (104) can be increased, safety can be increased, and the expansion body (101) can be thinned and made flexible.

Description

technical field [0001] The present invention relates to a dilation catheter used in surgery for the purpose of dilating a passage in the body, and particularly relates to a dilation catheter for avoiding unintentional breakage and damage to the wall of the passage in the body by expanding the dilation portion while feeding the infeed amount. dilation catheter. Background technique [0002] Dilation catheters are mainly used for in vivo channel formation therapy for stenotic or occluded blood vessels and other in vivo channels. Generally, a dilation catheter has a distal end portion of a tubular catheter shaft having a plurality of lumens inside, a dilatation body for supplying pressurized fluid that communicates with the dilatation lumens, and a proximal end portion that has ports that communicate with the lumens. , the expansion body is folded relative to the catheter shaft in a normal state. In this treatment, the dilating body portion of the dilating catheter is inserte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/22A61F2/958A61M29/02
CPCA61M2025/1081A61M2025/1004A61M2025/0004A61M25/1006A61B17/320725A61M25/104A61M2025/1086A61M2205/33A61M25/00A61M25/04
Inventor 深谷浩平
Owner KANEKA CORP
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