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[Mivacurium--use for complications of facial-cranial surgery--personal experience].

The aim of this study was to evaluate the effectiveness of mivacurium (Mivacron--GlaxoWellcome) during combined general anaesthesia in the operations on the facial cranium, after tracheal intubation performed using suxamethonium chloride (Chlorsuccillin--Polfa PL). We examined 20 patients, 17-65 years old, who were underwent operations due to facial and neck neoplasms or trauma. Patients were divided into two 10-person groups. In first group the dose of Mivacron for the induction of anaesthesia was 0.15 mg/kg of body weight, in second group the dose was 0.1 mg/kg of body weight. Next doses used during maintenance of anaesthesia were 0.1 mg/kg of body weight in both groups. Metohexital, fentanyl, nitrous oxide and oxygen were used for the maintenance of anaesthesia. The level of neuromuscular block was estimated using Ministim MS IIIA instrument. The mean time to maintain 95-99% neuromuscular block after inductive dose 0.15 mg/kg Mivacron was 15 minutes 26 seconds, and after the dose of 0.1 mg/kg--13 minutes 55 seconds. The time from the injection of the drug to maintain neuromuscular block was 1 minute 52 seconds and 1 minute 50 seconds, respectively. We did not observe neither negative influence of drug on the cardiovascular system nor the reactions of histamine release. Injection of suxamethonium chloride before the tracheal intubation did not prolong the time of Mivacron activity. Anticholinesterase agents was not use in any case. By 4 patient with heart failure prolongation of the activity time of Mivacurium was observed. The dose of 0.1 mg/kg, is efficient to maintain of the neuromuscular block on the stabile level. This allows the reduction of the total dose, and the decrease of the costs of the operation.