Levack I D, Tunstall M E
Anaesthesia. 1984 Feb;39(2):183-5. doi: 10.1111/j.1365-2044.1984.tb09512.x.
The need is identified of certain women in labour for a more potent analgesic than entonox. We describe a modification of the Entonox demand system incorporating an Oxford Miniature Vaporizer and there is a discussion directed towards its supervision.
