during nitrous oxide-fentanyl and nitrous oxide-isoflurane anaesthesia. Br. J. Anaesth, 55, 67S. Soter, N. A., Wasserman, S. I., Austen, K. F. and McFadden, E. R. (1980). Release of mast cell mediators and alterations in lung function in patients with cholinergic urticaria. N. Engl. J. Med., 302, 604. Twohig, M. M., Ward, S., and Corall, I. M. (1983). Conditions for tracheal intubation using at...

Dose-response curves for blockade of the indirectly elicited twitch of isolated guineapig nerve-lumbrical muscle preparations were determined for tubocurarine and pancuronium in the presence of potassium 2,4 and 6 mmol litre-1 and calcium 1,2 and 3 mmol litre-1. Increases in concentration of either ion decreased the sensitivity of the preparation to both drugs. Over the physiological range of c...