British Journal of Anaesthesia, 1991, Vol. 66, No. 1 45-47
© 1991 The Board of Management and Trustees of the British Journal of Anaesthesia
research-article |
EFFECT OF ARTERIAL CARBON DIOXIDE TENSION ON THE DURATION OF ACTION OF ATRACURIUM
The National Hospital for Nervous Diseases Queen Square, London WC1N 3BG
*Present address, for correspondence: Department of Anaesthesia, St Mary's Hospital, Praed Street, London W2 1NY.
The duration of action of atracurium was studied in two groups of patients. In group l (n = 15), patients' lungs were hyperventilated to a mean PaCo2 of 3.3 kPa and in group II (n = 15) lungs were ventilated to maintain a mean PaCo2 of 5.3 kPa. Anaesthesia was maintained using an infusion of propofol. The time taken to return to a T1 twitch height of 10% of control was measured following each incremental dose of atracurium 0.15 mg kg1. It was found that the duration of action of atracurium was significantly (P < 0.0005) shorter in the hypocapnic group.