Predictive values of umbilical artery waveforms and repeat cardiotocography in pregnancies complicated by nonreactive cardiotocography.
Fifty patients with a nonreactive nonstress cardiotocograph were studied. All had measurement of the A/B ratio of the umbilical artery Doppler waveform and 39 also had a repeat nonstress test. The positive and negative predictive values of the repeat nonstress test were 61% and 94%, respectively, and those of the A/B ratio were 67% and 83%. A repeat nonreactive nonstressed cardiotocograph appeared to be a test of high sensitivity (92%) and the A/B ratio a test of high specificity (83%). It is suggested that the combination of the two tests may prove a powerful predictor of adverse perinatal outcome.
Department of Midwifery, University of Glasgow, Queen Mother's Hospital, U.K.
S J
SJ
Hastie
M F
MF
Brown
M J
MJ
Whittle
D001783:Blood Flow Velocity / Q000502:physiology; D015148:Cardiotocography; D005260:Female; D005323:Fetal Monitoring; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis / Q000503:physiopathology*; D014463:Ultrasonography; D014469:Umbilical Arteries / Q000502:physiology*