A woman in labor is breathing into a mouthpiece just before the start of her regular contractions.As she inhales,a valve opens,and gas is released.She continues to inhale the gas slowly and deeply until the contraction starts to subside.When the inhalation stops,the valve closes.This procedure is:

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Quizplus · Accepted Answer

This is an application of nitrous oxide,which could be used in either the first or second stage of labor (or both)as part of the preparation for a vaginal birth.Nitrous oxide is self-administered and found to be very helpful.

A Woman in Labor Is Breathing into a Mouthpiece Just