To investigate whether inhaled nitric oxide (INO) can prevent platelet activating factor (PAF)—induced pulmonary hypertension and shock.
Randomized controlled animal trial.
Animals received general anesthesia and invasive hemodynamic monitoring, then PAF only, 2.5 μg/kg intravenously over 45 minutes (PAF group, n=9) or PAF in addition to INO, 20 ppm (PAF-INO group, n=6).
Vascular pressures (mean arterial and mean pulmonary), vascular resistance indexes (systemic and pulmonary), cardiac indexes, and oxygen delivery and oxygen consumption.
Mean arterial pressures, cardiac indexes, and oxygen delivery and consumption were significantly higher in the PAF-INO group. Mean pulmonary arterial pressures and systemic and pulmonary vascular resistance indexes were significantly lower in the PAF-INO group. There were 4 deaths (44%) in the PAF group vs none (0%) in the PAF-INO group (P=.10).
The use of INO prevents pulmonary hypertension, circulatory failure, and death during PAF-induced shock.Arch Surg. 1996;131:855-860