Control Group:Randomized, then IV sivelestat sodium placebo 0.2 mg/kg/h from 8h pre-op to 5 days post-op (total 6 days).

Sivelestat Sodium for Preventing Postoperative ARDS in Perioperative Patients with Intra-abdominal Infections: A Randomized, Double-Blind, Placebo-Controlled Pilot Study

Sivelestat Sodium for Preventing Postoperative ARDS in Perioperative Patients with Intra-abdominal Infections: A Randomized, Double-Blind, Placebo-Controlled Pilot Study