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Catheter sensor system for in-situ breathing and optical imaging measurements at airway in inside of lung
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Catheter sensor system for in-situ breathing and optical imaging measurements at airway in inside of lung
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Journal Article
Catheter sensor system for in-situ breathing and optical imaging measurements at airway in inside of lung
2020
Overview
A catheter sensor system composed of a tube flow sensor with a medical basket forceps and an optical fiberscope was systemized for in-situ measurements in the airway in the lung system. The tube flow sensor was produced by assembling the sensor film containing two heaters onto the tube surface, and the basket forceps was installed into the inside space of the tube sensor. The assembled tube flow sensor with the basket forceps was inserted into the tube and was fixed at the center of the tube by expanding the basket. The flow detection characteristics of the tube flow sensor were experimentally evaluated. A calibration equation based on King’s law was derived from the sensor output vs. flow velocity curve, and a sufficiently short response time of 60 ms was obtained for the breathing measurements in a rabbit and a person. Finally, the tube flow sensor with the basket forceps and the optical fiberscope was systemized into a single tube with the diameter of 5.0 mm for in-situ measurements in the airway. The developed system successfully detected both a breathing airflow waveform and an optical image inside the airway in the rabbit.
Publisher
Springer Berlin Heidelberg
