Fiber optic pressure catheter for cardiovascular applications

被引：1

作者：

Lin, YP ^{[1
]}

Sawatari, T ^{[1
]}

Hartley, CJ ^{[1
]}

机构：

[1] Sentec Corp, Walled Lake, MI 48390 USA

来源：

LASERS IN SURGERY: ADVANCED CHARACTERIZATION, THERAPEUTICS, AND SYSTEMS VIII, PROCEEDINGS OF | 1998年 / 3245卷

关键词：

fiber optics; cardiovascular; brain; lung; bladder; pressure sensor; miniature; disposable; catheter; animal test;

D O I：

10.1117/12.312329

中图分类号：

R75 [皮肤病学与性病学];

学科分类号：

100206 ;

摘要：

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 degrees C 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.

引用

页码：51 / 59

页数：9