A YOUNC CANADIAN girl of Scottish extraction, mesomorph in build, 120 pounds at full term, a primigravid aged nineteen, had been in labour for ten hours, and was near delivery. Meperidine 75 mg given four hours before was the only sedation. An outlet forceps assisted delivery was intended.The patient was exhorted to push with the last few contractions prior to the induction of general anaesthesia, and she cooperated with all her strength; pushing against a closed glottis.A semi-closed system using nitrous oxide and oxygen, 5 litres and 2 litres with trichlorethylene in a Rowbotham vaporizer, was used to produce rapid analgesia and later anaesthesia, Her breathing became snoring in character. A soft lubricated nasopharyngeal airway was inserted gently without difficulty, and spontaneous ventilation continued freely. No positive pressure was applied to the airway at any time.
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