Abstract:Objective To investigate the effects of strengthening the spleen and replenishing Qi on immune function, inflammatory response and intestinal mucosal barrier function in patients with severe acute pancreatitis. Methods A total of 66 patients with severe acute pancreatitis admitted to our hospital from December 2018 to July 2019 were enrolled, and were randomly divided into two groups, each with 33 cases. Control group received routine treatment, and experimental group received routine treatment combined with strengthening the spleen and replenishing Qi treatment. The therapeutic efficacy, immune function, inflammatory response, intestinal mucosal barrier function, Traditional Chinese Medicine (TCM) syndrome score, Acute Physiology and Chronic Health Evaluation Ⅱ (APACHE Ⅱ) and Balthazar CT score were compared between groups. Results There was significant difference in clinical efficacy between the two groups (P < 0.05). The differences in levels of CD4+, CD4+/CD8+, and Treg cells before and after the treatment were greater in control group than those in experimental group (P < 0.05). However, the difference in CD8+ cells, TNF-α, IL-6, CRP, plasma endotoxin as well as serum DAO, D-lactic acid, and amylase levels before and after the treatment were greater in experimental group than those in control group (P < 0.05). Additionally, the differences in TCM syndrome score, APACHE Ⅱ and Balthazar CT scores were as well greater in experimental group than those in control group prior to and after treatment (P < 0.05). Conclusions Application of strengthening the spleen and replenishing Qi can effectively ameliorate the intestinal mucosal barrier function, improve the body’s immune function, and reducing the inflammatory response for patients with severe acute pancreatitis.