We developed a new prototype active catheter with multi-link structure based on silicon micromachining. Many links are connected with joints made of Shape Memory Alloy (SMA) actuators. The active catheter can be used for medical purposes as an interventional therapy. As this has multi-link structure, it can bend actively on demand and conform to the shape of narrow blood vessels. The outer diameter of the fabricated active catheter is 2.8mm. Micro coil of SMA is used as the actuator for the joint. Two heating methods, direct heating and indirect heating of SMA was examined. Indirect heating by surrounding nickel thin film heaters is compatible with built-in circuit for driving the SMA actuator. We used silicon batch process for the fabrication of the link to minimize assembly work. UV (Ultra Violet) curing resin was used to fix the actuator and to make electrical contact. Bending motions, bending angle, force, and frequency response of the active catheter were measured.
|Number of pages||6|
|Publication status||Published - 1995 Jan 1|
|Event||Proceedings of the 1995 IEEE Micro Electro Mechanical Systems Conference - Amsterdam, Neth|
Duration: 1995 Jan 29 → 1995 Feb 2
|Other||Proceedings of the 1995 IEEE Micro Electro Mechanical Systems Conference|
|Period||95/1/29 → 95/2/2|
ASJC Scopus subject areas