DocumentCode
1220260
Title
An Electrooptical Sensor for Cardiac Sound and Vibrations
Author
Yeung, S.K. ; Yee, S. ; Holloway, A.
Author_Institution
Microtechnology Laboratory, Department of Electrical Engineering, University of Washington
Issue
1
fYear
1977
Firstpage
73
Lastpage
75
Abstract
An electrooptical sensor for long-term recording of the apex cardiogram in a clinical environment is reported here. The active elements of the sensor include three red light-emitting diodes (LED´s) and eight phototransistors. These function by detecting the change in light reflection from the chest wall caused by the mechanical vibrations and motions of the heart. The advantages of this sensor over the existing microphone include wide bandwidth (3.1 Hz-9.0 kHz), small physical size, and ease of attachment to patients in all positions.
Keywords
Acoustic reflection; Acoustic sensors; Cardiology; Electrooptic devices; Light emitting diodes; Mechanical sensors; Motion detection; Optical reflection; Phototransistors; Vibrations; Heart Auscultation; Heart Diseases; Heart Sounds; Humans; Kinetocardiography; Photometry; Vibration;
fLanguage
English
Journal_Title
Biomedical Engineering, IEEE Transactions on
Publisher
ieee
ISSN
0018-9294
Type
jour
DOI
10.1109/TBME.1977.326223
Filename
4122643
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