Medical catheter and its manufacture

Abstract

A medical catheter able to be led into human body has a conic front end which is visual to X-ray, and a ring which is precisely arranged in the internal cavity behind said conic front end, has a smelting point higher than that of catheter, and can not be passed by X ray.

Description

technical field [0001] The invention relates to a catheter for medical use and a manufacturing method thereof. Background technique [0002] A medical catheter is used in combination with a tube that is inserted into the body along a guide wire used to introduce a medical device into the body through the skin, or a medical device such as a dilation tube or a puncture needle. . The front end has a tapered portion that shrinks toward the front end diameter, and the inner diameter of the opening has an inner diameter that fits closely with the outer diameter of the combined medical device such as a guide wire, dilation tube, or puncture needle, and is free to slide. The tapered portion at the distal end of the catheter eases the diameter difference with the guide wire, dilation tube, puncture needle, etc., and facilitates insertion into the body. [0003] In order to confirm that the distal end of the medical catheter has reached the tubular tissue in the body, visibility of ...

AI Technical Summary

Problems solved by technology

However, when the distal end of the catheter is bent or deformed by bending, the X-ray opaque ring may fall off or cause misalignment.

Not only that, but the diameter difference caused by the X-ray opaque ring will also be generated on the periphery of the catheter, which will hinder the treatment

[0006] In addition, a method of embedding an X-ray opaque ring using a mold is conceived, but there is a problem that nodular shape defects tend to occur inside and outside the catheter (for example, Patent Document 1).

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