British Journal of Anaesthesia, 1995, Vol. 74, No. 6 706-708
© 1995 The Board of Management and Trustees of the British Journal of Anaesthesia
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Evaluation of the efficacy and safety of amethocaine gel applied topically before venous cannulation in adults
Department of Anaesthesia, North Staffordshire Hospital Centre City General Hospital, Newcastle Road, Stoke on Trent ST4 6QG
Present address, for correspondence: Department of Anaesthesia, Walsgrave Hospital, Coventry CV2 2DX.
We have assessed in a placebo-controlled, double-blind trial, the efficacy and safety of an amethocaine gel preparation for alleviating the pain of venous cannulation. Forty-two unpremedicated adult patients were allocated randomly to receive either amethocaine gel 1 g (4% w/w) or placebo gel 1 g applied to the dorsum of the hand for 40 min before venous cannulation. After removal of the gel, a 20-gauge cannula was inserted and the pain of cannulation assessed by a three-point rank score and a 100-mm visual analogue scale: 90% of patients who received amethocaine reported clinically acceptable topical anaesthesia. Both verbal rating scores and visual analogue scores for pain were significantly less with amethocaine. Slight erythema associated with amethocaine occurred in one patient and slight itching in two patients. No other adverse features were evident.
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