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Abstract
Thirty patients aged 1-23 mth received either alfentanil or fentanyl for the induction and maintenance of IV sedation during cardiac catheterization following oral flunitrazepam premedication (0.1 mg.kg-1). Patients breathed spontaneously 30 per cent oxygen in air. Both alfentanil and fentanyl abolished all reaction to pain and discomfort with minimal haemodynamic and respiratory changes. Induction doses of alfentanil and fentanyl were 20 +/- 6 and 2.5 +/- 1.1 (mean +/- SD) micrograms.kg-1, respectively, and maintenance requirements 30 +/- 12 and 1.5 +/- 0.6 micrograms.kg-1.h-1, respectively. These requirements were comparable among younger and older as well as cyanotic and acyanotic patients. The IV sedation described adds an effective method to the armamentarium of an anaesthetist working in the cardiac laboratory.
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