The use of 0.25% isoflurane premixed in 50% nitrous oxide and oxygen for pain relief in labour

The addition of 0.25% isoflurane to 50% nitrous oxide in oxygen provides more effective pain relief in labour than 50% nitrous oxide alone. This study was carried out to determine whether self‐administration by demand valve of 0.25% isoflurane in 50% nitrous oxide in oxygen premixed in cylinders at...

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