Validation of optoelectronic monitoring system for ear arterial pressure waveforms in practical use

摘要

Abstract: A newly developed optoelectronic monitoring systems for ear arterial pressure waveform (Earpres) was tested in ergonomics and sports science. Changes in systolic and diastolic blood pressures and heart rate were continuously measured by the system during VDT operations such as word processing and computer games, and during two different styles of weight lifting, one-hand and two-hands curls, with three different weights respectively. Statistical analysis of the results showed that systolic and diastolic blood pressures and heart rate increased during VDT operation, and in the extreme case the increments of those were as high as 78 mmHg and 50mmHg respectively during computer game operation and 50 bpm during word processor operation. It was also statistically clarified that systolic and diastolic blood pressures and heart rate increased in accordance with weight during one-hand and two-hands curls. It was ascertained that the results obtained by Earpres agreed for the most part with physiological knowledge; some results might be new findings. Earpres was thus validated as a physiologically and ergonomically useful apparatus. Additionally, an apparatus was constructed to detect the exact location of an artery in the ear, composed of a halogen lamp, a band-pass filter, a bundle of optical fibers, and a CCD device. With the apparatus, Earpres became much easier to handle. !13