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Catheter

A catheter and marker technology, applied in the direction of catheters, drug devices, other medical devices, etc., can solve the problems of difficulty in passing, the influence of the flexibility of the front end of the catheter, etc., and achieve excellent flexibility, tracking and safety.

Active Publication Date: 2010-05-12
TERUMO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since this type of catheter is laminated in the order of inner layer, outer layer, reinforcement material layer, and marker, the outer diameter of this type of catheter is large (thick), and it is sometimes difficult to pass through a small diameter (inner diameter) The target site, such as vascular stenosis, vascular end, etc.
In addition, in order to facilitate the confirmation of the position of the distal end of the catheter, the width of the band (band) constituting the marker is set to be large, so there is a problem that the flexibility of the distal end of the catheter is affected.

Method used

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no. 1 Embodiment approach

[0029] figure 1 It is an overall view showing the first embodiment of the catheter of the present invention, figure 2 yes figure 1 An enlarged cross-sectional view of region "A" in, image 3 yes figure 2 Magnified view of region "B" in . For the sake of illustration, the Figure 1 ~ Figure 3 The right side is called "base end" and the left side is called "front end".

[0030] figure 1 The shown catheter 2 includes a bendable catheter body 3 and a handle 7 attached to the proximal end 34 of the catheter body 3 .

[0031] From the base end 34 of the catheter main body 3 to the front end 33 thereof, a lumen (lumen) 31 is formed inside. When the catheter 2 is inserted into the blood vessel, the guide wire is inserted into the lumen 31 . In addition, the lumen 31 can also be used as passages for contrast agents, medical solutions, washing solutions, and the like.

[0032] The handle 7 can be used as an insertion port for inserting the above-mentioned guide wire into the ...

no. 2 Embodiment approach

[0077] Figure 4 It is a cross-sectional view showing the vicinity of the distal end portion of the catheter (second embodiment) of the present invention. For the convenience of explanation, the Figure 4 The right side is called the "base end" and the left side is called the "front end".

[0078] Hereinafter, a second embodiment of the catheter of the present invention will be described with reference to this figure, and only the differences from the above-mentioned embodiment will be described here, and the description of the same points will be omitted.

[0079] This embodiment is the same as the above-mentioned first embodiment except for the structure of the marker.

[0080] exist Figure 4 In the catheter body 3 a shown, the marker 8 a is different from the marker 8 of the first embodiment in that the reinforcing material layer bonding portion 83 is omitted, and only the inner layer bonding portion 82 is provided. That is, the marker 8 a is in close contact with the ...

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Abstract

A catheter includes an inner layer, an outer layer, a reinforcement layer located between the inner layer and the outer layer, and a marker composed of a contrast material for confirming the positionof the distal end portion of the catheter from outside the living body. The reinforcement layer is composed of a spiral first filamentous member, with a gap provided between those portions of the first filamentous member which are adjacent to each other along the longitudinal direction of the catheter. The marker is formed by spirally winding a second filamentous member having a filament diametersmaller than the gap, and has a portion in close contact with the inner layer in the gap.

Description

technical field [0001] The present invention relates to a catheter, which includes: an inner layer, an outer layer, a reinforcing material layer between the inner layer and the outer layer, and a marker made of contrasting material for confirming the position of the front end of the catheter from outside the body . Background technique [0002] In recent years, treatments such as PTCA (Percutaneous Coronary Angioplasty), which are performed on difficult-to-operate areas, or are performed to reduce damage to the human body, are often performed. In performing this type of treatment, a guide wire is used to guide the distal end of the catheter to the vicinity of the stenosis of the blood vessel. [0003] As such a catheter, for example, the catheter described in US Pat. No. 5,951,539 is known. The catheter described in US Pat. No. 5,951,539 has an inner layer, an outer layer, a reinforcement layer positioned between the inner layer and the outer layer, and a contrasting marke...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M25/00
CPCA61M2205/32A61M25/0045A61M25/0012A61M25/005A61M25/0108
Inventor 久保正明斋藤岳彦伊藤猛成
Owner TERUMO KK