What is delay time to establish a missing foetal trigger pulse by substitution logic?(a) 150 ms(b) 200 ms(c) 250 ms(d) 270 msThe question was posed to me during an interview for a job.This interesting question is from Ambulatory Monitoring Instruments topic in portion Arrhythmia and Ambulatory Monitoring Instruments of Biomedical Instrumentation

What is delay time to establish a missing foetal trigger pulse by subs

1.	What is delay time to establish a missing foetal trigger pulse by substitution logic?(a) 150 ms(b) 200 ms(c) 250 ms(d) 270 msThe question was posed to me during an interview for a job.This interesting question is from Ambulatory Monitoring Instruments topic in portion Arrhythmia and Ambulatory Monitoring Instruments of Biomedical Instrumentation
Answer» The correct CHOICE is (d) 270 ms The explanation: The substitution logic requires a delay TIME to establish a missing foetal trigger pulse. On the one hand, this delay has to be longer than the maximum permissible change in heart period (14 BPM change from 50–64 bpm = 262 ms) and on the other hand, it has to be shorter than the shortest period DURATION (216 bpm = 285.7 ms). It is thus KEPT as 270 ms.

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