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US 5,520,194 AGranted
Guide wire for medical purpose and manufacturing process of coil thereof
AssigneeAsahi Intecc Co., Ltd.
InventorsNaohiko Miyata, Masashi Momota, Kazuyuki Shimada
Life of this patent
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Abstract
A guide wire for medical purposes having a proximal section and a distal section and formed by inserting all or a portion of a slender and flexible shaft into a coil and fixing the shaft to the coil, wherein the coil is a multiple-wire coil consisting of at least 2 wire rods, at least one of these wire rods is made of a material which is opaque against radioactive rays such as X ray, and a portion of the coil close to the distal section of the shaft is a single-wire coil consisting of only a wire rod made of the radiopaque material.
Claims4
A guide wire for medical purposes comprising:
- a flexible shaft having a proximal section and a distal section;
- a non-multifiler single-wire coil comprising a single strand of wire rod surrounding at least a portion of the flexible shaft;
- said wire rod comprising an inner layer and an outer layer, said inner layer formed of a radiopaque material surrounding at least a portion of the distal section of the flexible shaft and a radiotransparent material surrounding nondistal portions of the flexible shaft, and said outer layer formed of a radiotransparent material.
Dependencies are inferred from the claim text.