Intraluminal pressure and temperature sensor aimed at application to flexible endoscope operation

In this study, an intraluminal pressure sensor with high immunity against fluctuation of temperature and illuminance aimed at application of flexible endoscope operation has been developed and demonstrated. The sensor device was specially designed for embedment on the endoscope tip. A 0.1μm thick Cr layer was coated on the device surface to prevent photo-electronic generation caused by strong endoscope's light. On the other hand, compensation of temperature drift on pressure signal was successfully performed with integrated temperature sensor. Measured pressure resolution was 0.4mmHg, and the corresponding pressure error was 3.2mmHg. The packaged device was successfully operated under mimic environment of animal experiment, and monitoring of pressure and temperature was successfully demonstrated even in pH1 acid solution.