Fiber optic pressure catheter for cardiovascular applications

Yuping Lin; Takeo Sawatari; Craig J. Hartley

doi:10.1117/12.312329

1 July 1998 Fiber optic pressure catheter for cardiovascular applications

Yuping Lin, Takeo Sawatari, Craig J. Hartley

Proceedings Volume 3245, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VIII; (1998) https://doi.org/10.1117/12.312329
Event: BiOS '98 International Biomedical Optics Symposium, 1998, San Jose, CA, United States

Abstract

We developed a fiber optic pressure catheter which has the potential to exceed the performance and cost-effectiveness of any currently available pressure measurement system in cardiovascular applications. Our design is based on a movable metallic ribbon, which works as a reflector, to transform the pressure into a light signal. The sensor has a diameter of 0.8 mm and is covered by medical grade polyurethane. In the laboratory tests, our sensors consistently showed high sensitivity and low noise (about 1 mmHg) over the pressure range of 0 to 300 mmHg. The time constant of the sensor, which is limited by the current software is about 20 mseconds (50 Hz). Using a mechanical heart simulator to generate pressure pulses, the pressure reading was independent of temperature change over a 30 degree Celsius range, and the drift was minimal during the 72-hour pressure pulse tests. A preliminary animal test was carried out with our sensors inserted into the artery of a dog. The comparison with an external reference sensor showed basic sensor performance. The sensor can also be used in brain, lung, and bladder pressure measurement applications.

Citation Download Citation

Yuping Lin, Takeo Sawatari, and Craig J. Hartley "Fiber optic pressure catheter for cardiovascular applications", Proc. SPIE 3245, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VIII, (1 July 1998); https://doi.org/10.1117/12.312329

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