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Medical guidewire

A medical wire technology, applied in the field of medical wires, can solve problems such as damage to blood vessels and other organs, loss of flexibility, etc., to achieve the effect of improving firmness and ensuring flexibility

Active Publication Date: 2012-10-24
ASAHI INTECC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, in the above-mentioned medical guide wire, when the resin is filled between the coil spring and the mandrel, although the problem of mutual interference is solved, the front end of the medical guide wire becomes too hard, and as a result, the flexibility is lost, so May damage blood vessels and other organs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 As shown, the medical guide wire 1A has a mandrel 2 in the shape of a round bar with a small diameter at the distal end and a large diameter at the proximal end.

[0035] In addition, an outer coil 3 is fixed to at least the front end portion of the mandrel 2 . Specifically, the outer coil 3 is composed of a single-strand coil tightly wound at least at the front end, and the front end of the outer coil 3 is connected to the front end of the mandrel 2 to form a substantially hemispherical front end 4 . In addition, the base end of the outer coil 3 is fixed on the mandrel 2 through the first fixing part 5 .

[0036] In addition, an inner coil 10 is disposed inside the outer coil 3 , and the inner coil 10 covers at least the front end of the mandrel 2 . The inner coil 10 is composed of a single-strand coil tightly wound across the entire length, and the front end of the inner coil 10 is connected to the front end portion 4 . In addition, the base end of...

Embodiment 2

[0045] Below, refer to figure 2 The medical guide wire 1B of the second embodiment will be described, and the description of the same parts as those of the first embodiment will be omitted, and the same reference numerals will be assigned in the drawings.

[0046] Such as figure 2 As shown, at least the front end portion of the outer coil 31 is loosely wound, and gaps are provided between the coil wires at the portion corresponding to the resin layer 20 .

[0047] In this way, at least the portion of the outer coil 31 corresponding to the resin layer 20 is loosely wound, so that the resin material constituting the resin layer 20 can be easily filled from the gap between the coil wires of the outer coil 31 . Therefore, the formation operation of the resin layer 20 is smoothed, and the productivity of the medical lead wire 1B is remarkably improved. In addition, on the outer coil 31 , the part corresponding to the resin layer 20 may be loosely wound or partly loosely wound, ...

Embodiment 3

[0049] Below, refer to image 3 The medical guide wire 1C of Example 3 will be described, and the description of the same parts as those of Examples 1 and 2 will be omitted, and the same reference numerals will be assigned in the drawings.

[0050] Such as image 3 As shown, the inner coil 14 is composed of a multi-strand coil formed by twisting a plurality of coil single wires. In addition, even when the multi-strand coil is meandered or bent, it has a so-called property that the deviation of the single wire is small, and has high firmness.

[0051] When the inner coil 14 is formed of a multi-strand coil as described above, the firmness is improved with the formation of the resin layer 20, and at the same time, the firmness of the distal end portion of the medical guide wire 1C is greatly improved. In addition, since the winding angle of the coil single wire of the multi-strand coil relative to the central axis of the medical guide wire 1C is smaller than the winding angle ...

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PUM

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Abstract

There is provided a medical guidewire (1A) having a flexible and robust front end portion. The medical guidewire (1A) includes a resin layer (20). The resin layer (20) is formed by filling a resin material between an outer coiled body (3) and an inner coiled body (10). Even when the medical guidewire (1A) is bent or curved, therefore, the outer coiled body (3) and the inner coiled body (10) do not interfere with each other. In addition, the front end portion of the medical guidewire (1A) does not become too hard. Therefore, the medical guidewire (1A) has excellent flexibility and robustness.

Description

technical field [0001] The invention relates to a medical lead suitable for the medical field. Background technique [0002] In a medical field, when inserting a catheter into a blood vessel, the urethra, or an organ, or inserting an indwelling device into an aneurysm formation part of a blood vessel, a medical guide wire is well known as a guide. Generally, the medical guide wire includes a mandrel and a coil wound around the outer periphery of the front end of the mandrel, and the front end is formed by connecting the front end of the coil and the front end of the mandrel. [0003] In addition, in order to simultaneously ensure the flexibility and rotational force transmission of the distal end portion of the medical guide wire, the medical guide wire has an outer coil and an inner coil arranged inside the outer coil. This structure has been disclosed (see Patent Document 1: U.S.A. Patent No. 5345945 specification). [0004] In addition, it is also disclosed that the med...

Claims

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Application Information

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IPC IPC(8): A61M25/09
CPCA61M2025/09175A61M2025/09083A61M25/09A61L31/00
Inventor 槙英昭
Owner ASAHI INTECC CO LTD
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