Study Status: Enrolling by invitation
Recruit Status: Enrolling by invitation
Study Type: Interventional
Official Title: A Randomized, Blind, Placebo-controlled, Parallel Group, Multi-center Study to Evaluate the Safety and Dose Response Relationship of Ulinastatin for Acute Respiratory Distress Sy
Brief Summary: Compared with placebo, evaluate the effects and safety of Ulinastatin added to conventional treatment for ARDS; Evaluate the dose response relationship of Ulinastatin for ARDS.