Coil Type Ultrasonic Motor for Vascular Endoscope

Abstract:

IVUS (Intravascular Ultrasound) is a useful medical device to observe the thrombus in blood vessels, and such a micro motor less than 1.0mm in outer diameter is desired to apply IVUS in narrow brain vessels. In our previous works, ultrasonic motor consisting of a wire coil type stator, a waveguide, a cylindrical rotor, an ultrasonic vibrator has been developed. This motor is rather easy to miniaturize because of its simple structure. However, this motor behavior is unstable rotate. To improve these problems, a foil type stator has been applied in stead of a wire coiled stator. An ultrasonic motor with 0.05mm thick foil type stator was manufactured and tested their performances. It was able to verify that this ultrasonic motor with a foil type stator has the right quality. So, simplified IVUS system using ultrasonic motor with a foil type stator was manufactured and tested their fundamental performances. In order to expand development of new application, ultrasonic motor with a shortened waveguide and ultrasonic motor integrated driving unit with a stator was developed.

• Periodical: Applied Mechanics and Materials (Volume 332)
• Pages: 540-544
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.332.540
• Online since: July 2013
• Authors: Shigeki Toyama
• Keywords: Intravascular Ultrasound (IVUS), Micro Motor, Ultrasonic Motor, Vascular Endoscope

References

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