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

Abstract

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.