Why the study?
Does a continuous nasal supplement of Entonox reduce the time to attain specified end-tidal nitrous oxide concentrations in mothers in labour?
Does a continuous nasal supplement of Entonox reduce the time to attain specified end-tidal nitrous oxide concentrations in mothers in labour?
A continuous nasal supplement of Entonox may reduce the delay in achieving effective analgesia concentrations during labour.
May accelerate effective nitrous analgesia in labour; hypothesis-generating and requires prospective validation before practice change.
In a pilot study in six mothers using 50% nitrous oxide and 50% oxygen (Entonox) as an intermittent self-administered analgesic during labour, a significant reduction in the mean times to attain specified end-tidal nitrous oxide concentrations was obtained by a continuous nasal supplement of Entonox. The method proved acceptable in this small number of patients and there were no demonstrable effects upon fetal heart rate.
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Davies et al. (1978) studied this question.
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