Fetal monitoring during labor
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United States of America Patent
Stats
-
Aug 28, 1990
Grant Date -
N/A
app pub date -
Sep 27, 1988
filing date -
Sep 30, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for monitoring fetal health during labor detects the occurrence of a fetal ECG in digital signals derived from electrodes on a fetus using a matched filter routine to detect a QRS complex. The peaks of successive R waves are then found and used to determine fetal heart rate. After time coherent filtering of digital samples representing the fetal ECG the P-R interval and the elevation of the S-T interval are found and a correlation coefficient between the fetal heart rate and the P-R interval is derived. The elevation and the coefficient are displayed. If the correlation coefficient becomes positive for about half an hour and a significant fall in the elevation of the S-T interval also occurs it is an indication of acidosis of the fetus.
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Family
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