Optical aspects of a fibre-optic sensor for respiratory rate monitoring.
A new sensor for respiratory rate monitoring is described. The sensor uses an optical fibre that detects the evaporated humidity from the mouth and/or nose at each exhalation. The condensed humidity substantially alters the coupling of light from the optical fibre to the surrounding medium, which can be monitored by a photo-detector. The sensing principle is evaluated using ray-tracing simulation and scattering measurements.
Pettersson
H
H
Department of Biomedical Engineering, Linköping University, Sweden.
Stenow
E N
EN
Cai
H
H
Oberg
P A
PA
D003198:Computer Simulation; D005336:Fiber Optic Technology; D006801:Humans; D018715:Microscopy, Video; D008962:Models, Theoretical; D008991:Monitoring, Physiologic / Q000295:instrumentation; D012119:Respiration; D012542:Scattering, Radiation