Abstract
SUMMARY Measurement of capillary pH, Pco 2 and standard bicarbonate values, respiratory rate, tidal volume and minute volume were undertaken in two comparable series of eleven patients undergoing hip surgery. One series received trichloroethylene and nitrous oxide anaesthesia, while the second received in addition, intermittent intravenous pethidine in such a dosage as to prevent tachypnoea. Blood-gas measurements and systolic blood pressure appeared unaffected by trichloroethylene, nitrous oxide anaesthesia alone. The pressure appeared unaffected by trichloroethylene, nitrous oxide anaesthesia alone. The addition of pethidine resulted in the development of serious hypercarbia (Pco 2 >60 mm Hg) in two patients, moderate arterial hypotension in seven and a prolonged recovery time in nine out of eleven patients.
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