Objective:To investigate different types abdominalcompartment syndrome(ACS)complicating with severe acute pancreatitis(SAP).Methods:The clinical features and therapeutic principles of 2 types of ACS complicating with SAP weresummarized in 3 typical cases.Results:Type I ACS(gut type)was mainly caused by gastroin-testinaldysfunction.with gastrointestinal gas or liquid accumulation

chiefly ffecting respiratoryfunction.Type II ACS(retro-peritoneal type)was mainly caused by retro-peritoneal necrosis orexudation.chiefly affecting cardiovascular and renal function.Observation of clinical manifestationsand CT scanning could obtain differential diagnosis.Type I ACS could effectively be treated with liquid

electrical and gut balancing while type II ACS needed prompt decompression.Conclusion:Different types of ACS complicating with SAP have different clinical features and need different treatments.Summarizing different types of ACS complicating with SAP may improve the understanding and therapy of this pathophysiological procedure.