Anaesthesia
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Randomized Controlled Trial Comparative Study Clinical Trial
Assessment of recovery following day-case arthroscopy. A comparison between propofol and isoflurane-based anaesthesia.
Fifty healthy patients, aged 15-45 years, undergoing day-case arthroscopy, participated in a study to assess aspects of recovery and mood. Psychomotor tests, including the p-deletion test and the Trieger dot test, were performed pre-operatively and mood was measured using the mood adjective checklist. Anaesthesia in all patients was induced with propofol and a laryngeal mask airway was inserted immediately. ⋯ The time to discharge was similar in both groups as was the incidence of side effects. There was no difference in mood scores between the groups either at the time of discharge or at 24 h. We conclude that psychomotor recovery is somewhat quicker when isoflurane-based anaesthesia is used for day-case arthroscopy, but other factors, including time to awakening, mood and time to discharge are similar for both techniques.
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Randomized Controlled Trial Comparative Study Clinical Trial
Metoclopramide and prochlorperazine do not decrease propofol hypnotic requirements.
One hundred patients scheduled for minor surgery were given either saline, metoclopramide 0.1 mg.kg-1 or 0.2 mg.kg-1, or prochlorperazine 0.1 mg.kg-1 or 0.2 mg.kg-1 before induction of anaesthesia with a fixed rate infusion of propofol. Neither metoclopramide nor prochlorperazine reduced the induction dose of propofol. The possibility that these agents increased the induction dose could not be excluded.
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Randomized Controlled Trial Comparative Study Clinical Trial
Comparison of the reinforced laryngeal mask airway and tracheal intubation for nasal surgery.
Airway maintenance and protection during anaesthesia and recovery provided by the reinforced laryngeal mask airway was compared with the sequential use of a tracheal tube followed by the Guedel airway in 66 patients having anaesthesia for nasal surgery. One patient was withdrawn from the laryngeal mask group because the airway was difficult to position. All patients had an oropharyngeal pack inserted and Moffett's solution instilled into the nasal cavities. ⋯ Contamination of the lower airway occurred in only five patients. During recovery from anaesthesia the laryngeal mask and Guedel airway were well tolerated by most patients, but only the mask laryngeal provided an unobstructed airway in all patients. The laryngeal mask protects the larynx from contamination during and after operation until the return of the patient's own protective reflexes.
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Randomized Controlled Trial Clinical Trial
Effects of magnesium sulphate on suxamethonium-induced complications during rapid-sequence induction of anaesthesia.
Twenty patients were studied in a double-blind manner to investigate whether magnesium sulphate, when given during a rapid-sequence induction of anaesthesia, lessens the side effects caused by suxamethonium. Patients were randomly allocated to two groups; equal volumes of either magnesium sulphate (40 mg.kg-1) or saline were given during rapid-sequence induction of anaesthesia, after thiopentone but before the administration of suxamethonium (1.5 mg.kg-1). The changes in the serum potassium concentration, the degree of muscle fasciculations and the presence of postoperative myalgia were recorded. ⋯ Magnesium did not clinically prolong muscle relaxation. There was no difference between the groups in the incidence of myalgia after surgery (one patient in each group). Since no significant increase in the serum potassium concentration was demonstrated, no assessment could be made of the effect of magnesium sulphate on the serum potassium concentration after administration of suxamethonium.
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Randomized Controlled Trial Clinical Trial
The influence of isoflurane on a continuous infusion of mivacurium.
Sixty surgical patients were studied to evaluate the neuromuscular effects of mivacurium 0.15 mg.kg-1 (2 x ED95) for tracheal intubation. After intubation the patients were randomly allocated to receive alfentanil with either propofol (starting with 9 mg.kg-1 h-1, reducing to 6 mg.kg-1 h-1 after 20 min) or isoflurane (0.5% end-tidal). In addition, all the patients were given a continuous infusion of mivacurium 10 micrograms.kg-1 min-1 after tracheal intubation which was adjusted to maintain 90% depression of T1. ⋯ Tracheal intubation was completed 232 (155) s after administration of the relaxant and intubating conditions were graded as 'excellent' or 'good' in 56 patients. Although the mean (SD) mivacurium infusion rate for maintaining T1 at 10% was higher in the propofol group, 4.8 (2.1) compared with 4.4 (2.0) micrograms.kg-1 min-1 in the isoflurane group, this was not significantly different (p > 0.05). The mean (SD) recovery index was prolonged in the isoflurane patients, 757 (508)s, compared to those receiving propofol, 466 (219)s (p < 0.05).