Articles: general-anesthesia.
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Acta Anaesthesiol Scand · Aug 1980
Comparative StudyEffect of epidural versus general anaesthesia on calf blood flow.
The arterial inflow into the calf, venous emptying rate and venous capacity were studied by means of venous occlusion plethysmography on the non-operated leg in two groups of patients undergoing total hip replacement. One group of eight patients received epidural blockade intraoperatively, which was prolonged postoperatively for pain relief, while the other group of eight patients was given general anaesthesia with intermittent positive-pressure ventilation intraoperatively and parenteral analgesics for pain relief in the postoperative period. ⋯ The sustained reduction of flow in the deep veins of the lower limb might be a significant contributory factor in the initiation of deep venous thrombosis. In three of the eight patients in the general anaesthesia group, the venous emptying rate and venous capacity had decreased 3 h postoperatively to a very low level, indicating thrombus formation in immediate association with the surgery.
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Acta Anaesthesiol Scand · Jun 1980
Case ReportsEar injury caused by elevated intratympanic pressure during general anaesthesia.
Two cases of middle-ear injury, due to sharp fluctuations of intratympanic pressure as a result of general anaesthesia with nitrous oxide are presented. A study is reported indicating that the degree of these fluctuations is a function of the concentration of nitrous oxide. In order to reduce the risk of middle-ear injury due to nitrous oxide anaesthesia, it is suggested that the lowest concentration feasible should be used where there is a history of previous ear surgery.
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The Laerdal mask can be easily modified to permit nasotracheal intubation to be undertaken under general anaesthesia with the aid of a fiberoptic laryngoscope.