... University Hospital, Osaka University, Yamadaoka, Suita, Osaka 565, Japan.2Research Institute for Microbial Diseases, Osaka University, Yamadaoka, Suita, Osaka 565, Japan.AbstractBackground: ... may play a part in the mech-anisms by which HFO is responsible for less pulmonary injury, although detailed histological analysis was not per-formed in this study. Pulmonary microvascular and ... inner diam-eter (ID) endotracheal tube and tied to prevent air leakage.Arterial cannulation was performed via the internal carotidartery. Rectal temperature was monitored and maintainedat 38°C...