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Abstract
Five fetal biophysical variables, fetal breathing movements, fetal movements, fetal
tone, qualitative amniotic fluid volume, and the nonstress test, were measured in
the same observation period in 216 patients with high-risk pregnancies. All delivered
within one week of the last observation. The relationship between individual biophysical
variables and combinations of variables to the outcome of pregnancy as judged by five-minute
Apgar score, fetal distress in labor, and perinatal mortality rate (PMN) was determined.
For any single test, the false negative rate was low and was similar between tests,
but the false positive rate was high (>50%) and varied significantly between tests.
Combining tests resulted in a significant change in both the false negative and false
positive rates as compared to any single test. The most accurate differentiation of
the normal from the compromised fetus was obtained when all five variables were studied.
The PNM ranged from 0 when all variables were normal to 600 per 1,000 when all were
abnormal. These data suggest that combined fetal biophysical testing is a more accurate
method of antepartum fetal evaluation than any single method.
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Article Info
Publication History
Accepted:
May 21,
1979
Received:
April 6,
1979
Footnotes
☆Supported by a grant from the National Foundation-March of Dimes.
Identification
Copyright
© 1980 Published by Elsevier Inc.