Asahi Intecc Co., Ltd.

Tadakazu Kato

Tomihisa Kato

Naohiko Miyata

Kenji Miyata

Hideaki Maki

Shinichi Goto

Ryuji Kusuda

Yoshinobu Nakagoshi

Toshiya Osawa

Kazumi Matsuo

There is provided a medical guidewire which reduces the resistance with a curved guiding catheter, and has improved durability that can keep the resistance reduced for a long time. A core shaft of the medical guidewire has a second cylindrical part, with a smaller diameter than that of a coiled body, on a proximal end side of the coiled body. This second cylindrical part is coated with a hydrophilic material. Further, the hydrophilic material coated on the second cylindrical part has a larger thickness than a hydrophilic material coated on the coiled body.

Medical guidewire

In a wire-stranded hollow tube (), a plurality of metallic wires () preformed with a predetermined forming rate are twisted along a circular line into a careless hollow configuration. When twisting the metallic wires (), the neighboring metallic elements () are subjected to compression with no gap between the neighboring metallic elements (). This increases a contact pressure between the neighboring metallic elements () to attain a good tightness with a good circularity and diametrical uniformity secured therebetween, thus preventing the wire-stranded hollow tube () from inadvertently collapsing. A tightness is strengthened between the neighboring metallic elements () when the metallic elements () of different helical pitch are used. By applying the wire-stranded hollow tube () to a medical guide wire, a quick torque response and a good torque transmissibility are ensured which lead to a good manipulatability with a favorable follow-on capability.

Wire-stranded medical hollow tube, and a medical guide wire

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Aichi, Japan

Tadakazu Kato