Fetal monitoring during labor

Details Fetal monitoring during labor Fetal monitoring during labor

1988-09-27

1990-08-28

Jaworski, Francis

Surgery

Truss

Pad

128696, 128702, 128708, A61B 504

Patent

active

049516809

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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