-
Comparative Study
Ventilatory effects during and after continuous infusion of fentanyl or alfentanil.
- C J Andrews, M Sinclair, C Prys-Roberts, and A Dye.
- Br J Anaesth. 1983 Jan 1;55 Suppl 2:211S-216S.
AbstractThe opioid drugs fentanyl and alfentanil were infused at a constant rate as supplements to nitrous oxide in oxygen anaesthesia throughout the period of surgery. These infusions were continued into the period after operation for 1 h after the discontinuation of anaesthesia. Continuous infusion of alfentanil 20 micrograms kg-1 h-1 and fentanyl 3 micrograms kg-1 h-1 resulted in depression of the carbon dioxide response curve with a lesser effect on frequency and minute ventilation. One hour after discontinuing the infusions the degree of ventilatory depression was only marginally less with fentanyl, but considerably less with alfentanil, reflecting the shorter terminal half-life of that drug.
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