Composite signal implementation for acquiring oximetry signals
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United States of America Patent
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Mar 10, 1992
Grant Date -
N/A
app pub date -
Oct 5, 1989
filing date -
Oct 5, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An oximeter system for measuring blood oxygen saturation using a noninvasive optical technique is disclosed. A patient's arterial blood is illuminated with light at two different wavelengths and the intensity of the light which is transmitted through or reflected by said arterial blood is correlated with the blood oxygen saturation of the tissue. The system provides a manner in which filtering artifacts are avoided in the oximeter signal using a high resolution analog-to-digital converter of 14 bits or more, such that, it is unnecessary to separate the DC and pulsatile components of the oximeter signal prior to processing within the microprocessor.
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