Abstract:To study the relationship between serum amylase level and prognosis, and explore the mechanism of hyperamylasemia in the patients with acute poisoning. Methods The clinical data of the patients with acute poisoning in Tongji Hospital from March 2014 to March 2016 were retrospectively analyzed. The changes of serum amylase and the isozyme were observed. The patients were divided into three groups according to the serum level of amylase: normal amylase group, moderate amylase level group and high amylase level group. The APACHEII sore, PSS sore and mortality were compared between the three groups. Results A total of 189 patients with acute poisoning were included, including 132 cases with hyperamylasemia and 76 cases with increased pancreatic amylase. Compared with the normal amylase group, the APACHEII sore, PSS sore and mortality were obviously increased in the other two groups, and the differences were statistical significant (p < 0.05). The APACHEII sore, PSS sore and mortality in the high amylase level group were significantly higher than those in the moderate amylase level group (p < 0.05). Conclusions Hyperamylasemia often appears in the patients with acute poisoning. Serum amylase can be used as an indicator of the critical condition and prognosis of the patients with acute poisoning. The mechanism of hyperamylasemia in the patients of acute poisoning is complicated, and the diagnosis of acute pancreatitis should be cautious.