Objective To investigate efficacy of prophylactic surfactant and inhaled nitric oxide(iNO) in alleviating the acute lung injury. Methods Thirty piglets (body weight 6 to 9 kg) were randomly allocated to either a negative control group (group N, n=6) with only normal saline and groups with escherichia coli (n=6 each) followed by treatment with: (1)a positive control with mechanical ventilation only (group C),(2) iNO at 10 ppm (group NO),(3) surfactantat 100 rog/kg (group Surf),(4) both surfactant and iNO...