Question

Which technique is used to derive an integrated rate of the foetus heart from blood flow signals and to display it on a suitable display system?

(a) Abdominal Foetal Electrocardiogram

(b) Foetal Phonocardiogram

(c) Ultrasound

(d) Foetal ECG with scalp electrode

This question was posed to me by my college professor while I was bunking the class.

My question is taken from Recording System topic in chapter Foetal Monitoring Instruments of Biomedical Instrumentation

Answer 1

Correct choice is (c) Ultrasound

To explain: An important clinical instrument for obstetric applications which makes use of the Doppler shift principle is the foetus blood flow detector. The ultrasound technique is extended to derive an integrated rate of the foetus heart from blood flow signals and to display it on a suitable display system.