Active guide wire and method of making the same

Details Active guide wire and method of making the same Active guide wire and method of making the same

2005-08-30

2005-08-30

Marmor, Charles (Department: 3736)

Surgery

Diagnostic testing

Flexible catheter guide

C604S528000

Reexamination Certificate

active

06936015

ABSTRACT:
An active guide wire (1) that can be used in a narrow blood vessel in a complicate vascular system such as intracerebral is disclosed as well as a method of making the same. The active wire comprises a bias coil spring (3); an outer tube (4) having the bias coil spring (3) sheathed therewith and providing an external wall for the active wire guide (1); and a shape memory alloy (SMA) actuator (5) in the form of a flat sheet anchored in and securely connected to the outer tube (4), wherein the flat sheet SMA actuator (5) is shape memorized so as to bend in a direction of the thickness of the flat sheet and has a shape running zigzag longitudinally thereof. The actuator (5) is energized with an electric current and thereby heated to have its leading end bent.

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Takashi Mineta et al. “An Active Guide Wire With Shape Memory Alloy Bending Actuator Fabricated By Room Temperature Process” Transducers '01 Eurosensors XV, The 11thInternational Conference on Solid-State Sensors and Actuators, Munich, Germany, Jun. 10-14, 2001, vol. 1, pp. 698-701.
Shuxiang Guo et al. “A Study on Active Catheter System (Structure, Experimental Results and Characteristic Evaluation of Active Catheter with Multi D.O.F).” JRSJ(Japan Robot Society Journal), vol. 14, No. 6, Sep. 1996, pp. 820-835 (Abstract Only).

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