British Journal of Anaesthesia, Vol 76, Issue 2 203-208, Copyright © 1996 by The Board of Management and Trustees of the British Journal of Anaesthesia
F. Boer, E. Olofsen, J. G. Bovill, AGL. Burm, A. Hak, M. Geerts and K. E. Wetselaar
We have studied the pulmonary uptake of sufentanil in patients during and
after a short infusion of the drug. We studied 10 patients undergoing
elective coronary artery bypass surgery during anaesthesia with 0.4-0.8%
enflurane, before surgery. Sufentanil 50 micrograms min-1 was given over 10
min by a constant rate infusion. During infusion and for 20 min thereafter,
blood samples were obtained from the distal port of the pulmonary artery
catheter and from a radial artery catheter. Uptake and release of
sufentanil into and from the lungs were examined by mass balance and
compartmental analyses. At the end of the infusion a mean of 48.9 (SD
18.6)% of the dose was retained in the lungs, and 20 min after infusion
retention was 18.4 (22.4)%. Smokers had significantly higher pulmonary
retention of sufentanil. The pulmonary volume of distribution of
sufentanil, estimated from the two- compartment model, was 20.9 (7.7)
litre. We conclude that pulmonary uptake of sufentanil is significant, if
the drug is given as an infusion.
CLINICAL INVESTIGATIONS
Pulmonary uptake of sufentanil during and after constant rate infusion
Department of Anaesthesiology, University Hospital Leiden, Postbox 9600, 2300 RC Leiden, The Netherlands
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