dimethyltubocurarine and Burns

The neuromuscular effects of the combined administration of pancuronium and dimethyltubocurarine were evaluated in children undergoing reconstructive surgery (n = 6), or the skin grafting of acute burn wounds: body surface area (BSA) burns less than 40% (n = 5); and BSA burns greater than 40% (n = 6). A dose of pancuronium 0.005 mg kg-1 was considered to be equipotent with dimethyltubocurarine 0.02 mg kg-1, and each dose was defined as being equal to 1 relaxant equivalent (RE). Incremental doses of the combination of pancuronium and dimethyltubocurarine were administered until a 95% depression of twitch height was achieved (ED95). These results were compared with previously published data for pancuronium and dimethyltubocurarine alone. The mean ED95 of the combination in the control population (reconstructive surgery) was 5.1 RE, compared with 10.8 RE and 10.0 RE for pancuronium and dimethyltubocurarine , respectively, administered alone. In the acutely burned population, the mean ED95 for the combination was 9.9 and 15.9 RE, respectively, compared with 26 RE for pancuronium alone in burned patients. In all groups of patients, significantly less total drug was required when the combined therapy was used.

Topics: Burns; Child; Dose-Response Relationship, Drug; Drug Synergism; Humans; Muscle Contraction; Neuromuscular Blocking Agents; Neuromuscular Junction; Pancuronium; Surgery, Plastic; Synaptic Transmission; Tubocurarine