Question

In the cardiotocograph, the sensitivity of _______ of recording chart allows adequate reading of the recorder FHR.

(a) 30 bpm / cm

(b) 10 bpm / cm

(c) 20 bpm / cm

(d) 15 bpm / cm

I have been asked this question by my school teacher while I was bunking the class.

This intriguing question comes from Data Compression Techniques topic in section Arrhythmia and Ambulatory Monitoring Instruments of Biomedical Instrumentation

Answer 1

Right choice is (c) 20 bpm / cm

To explain: Normally, an accuracy of measurement of foetal heart rate may be 2-3% for classification for responses. Sensitivity of 20 bpm /cm of the recording chart allows adequate reading of the recorder FHR. Labour activity and FHR traces are usually recorded simultaneously on the same time scale.