LAUSR

To explore the curative effect of insulin external application on burn wounds of diabetic patients with different depths. A retrospective analysis of 114 diabetic burn patients in the First Hospital of Hebei Medical University from June 2019 to June 2022. According to the different treatment methods, they were divided into study group (insulin therapy) and control group (conventional therapy) with 57 cases in each. The wound healing time, dressing changes, scar healing after wound healing and adverse events were compared between two groups. Pain level, serum inflammatory factors, vascular endothelial growth factor (VEGF) and oxidative stress factors before and after treatment were compared. The wound healing time (17.23 ± 2.18 vs 20.31 ± 2.09 days) and the number of dressing changes (7.01 ± 1.23 vs 8.93 ± 1.32 times) in study group were significantly lower than those in control group (P < 0.05). Before treatment, there was no difference in pain level, VEGF, interleukin‐1 (IL‐1), tumour necrosis factor‐α (TNF‐α), malondialdehyde (MDA) and superoxide dismutase (SOD) between two groups (P > 0.05). However, the pain level, scar healing, IL‐1, TNF‐a and MDA in study group were significantly lower than those in control group after treatment (P < 0.05). And the VEGF and SOD in study group was significantly higher than that in control group (P < 0.05). External application of insulin can shorten the wound healing time of diabetic patients with different depths, reduce the number of dressing changes, promote scar healing after wound healing, relieve pain and reduce the level of inflammatory factors, which is worthy of clinical promotion.