Identifying the High-Risk Fetus in the Low-Risk Mother Using Fetal Doppler Screening

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The Umbiflow device, a continuous-wave Doppler ultrasound device used to measure the resistance index in the umbilical artery. © 2022 Council for Scientific and Industrial Research/South African Medical Research Council
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FIGURE
Protocol for Managing Women With an Abnormal Continuous-Wave Doppler Ultrasound Result
Abbreviations: AEDF, absent end diastolic flow; AFI, amniotic fluid index; CTG, cardiotocograph; RI, resistance index; SF, symphysis fundal height.
Note: Ward-based health outreach teams assisted to trace patients who could not be contacted by other means (except in Umbi-9 study).

TABLE.

Results of Recent Umbiflow Studies

	No. of Participants	Prevalence Abnormal RI	Prevalence AEDF	Mortality Reduction
Mamelodi Nkosi et al.²¹	2,868	11.7%	1.5%	PNMR: −42%
Umbi 9 Hlongwane et al.²⁹	7,088	13.0%	1.2%	SBR: −43%
Umbiflow International Vannevel et al.³⁰	7,151	6.9%	0.2%	---