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Uterine contractions are calibrated in range of ______ in two-channel chart recorder.

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Uterine contractions are calibrated in range of ______ in two-channel chart recorder.

(a) 0-100 mm Hg

(b) 100-200 mm Hg

(c) 200-300 mm Hg

(d) 300-400 mm Hg

The question was asked during an internship interview.

I would like to ask this question from Ear Oximeter topic in chapter Oximeters of Biomedical Instrumentation

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The correct answer is (a) 0-100 mm Hg

The explanation is: A two-channel chart recorder is incorporated in instruments used for monitoring labour activity. One channel records FHR on a calibrated chart in beats per minute (50–210 bpm) while the other channel is used for recording uterine contractions calibrated 0-100 mmHg. The standard chart speed is usually 1 or 2 cm/min.

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