Guide wire unit with internal guide wire of shape memory alloy

Abstract

Abstract A stylet unit (40), which can be inserted into a hollow, flexible component, such as an electrode cable, to stiffen the component and bend a distal end section thereof. The stylet unit (40) is a double stylet combination comprising a flexible tubular stylet shell (42) and an internal stylet wire (44), displaceably arranged inside the shell's channel, with a pre-bent distal end section (46). This end section can be set at a retracted internal position inside the stylet shell or at an exposed position outside the shell (42). The internal stylet's (44) pre-bent distal end section (46) is made of a shape memory alloy or metal and has a radius of curvature (ρ(1)) which varies longitudinally (1) in the section. The end section (46) can be devised in the shape of e.g. a spiral, and the shape memory alloy can be e.g. a nickel-titanium alloy.

Inventors

• 👤 Mats Boström

Bibliographic Details