To analyze the clinical efficacy of hydrosurgery system in the treatment of deep partial-thickness burn wound, and to provide new ideas and methods for the treatment of deep partial-thickness burn wound.

From January 2018 to December 2019, 40 patients with deep partial-thickness burns who met the selection criteria were selected from the Department of Burns and Plastics, Affiliated Hospital of Nantong University. The burns area was 2%-29% of the total body surface area (TBSA). The wound area located in the non joint functional parts of the trunk and limbs (100±10) cm² was the experimental window area. The patients were divided into two groups according to random number table method, 20 cases in each group. All patients were treated with 0.5% polyvinylpyrrolidone iodine disinfectant for wound disinfection after admission, then bandaged with sterile gauze dressing. Versajet Ⅱ hydrodynamic debridement system was used for wound debridement in the test window area of the observation group. Conventional surgical instruments were used for wound debridement in the test window area of the control group. After debridement, the wounds of the two groups were covered with lipid water gel dressing in the test window area, bandaged with sterile gauze. After debridement in the window area of the test area, the corresponding debridement methods were selected according to the judgment of the researchers and the wishes of the patients. After debridement, symptomatic treatment such as anti-infection and nutritional supplement was given to the patients according to their conditions. Wound dressing was changed regularly until wound healing. The rate of wound necrosis tissue clearance, infection after operation, wound healing time were observed, and the wound infection, liver function, renal function, coagulation blood image and blood routine test index at 7, 14, 21 days after debridement were observed in the two groups. Data was processed with t test.

The wound necrotic tissue clearance rate of the observation group was (93.5±2.4)%, which was significantly higher than that of the control group [(91.3±3.9)%], the difference was statistically significant (t=-3.371, P< 0.05); the wound healing time of the observation group [(15.8±3.0) d] was significantly shorter than that of the control group [(18.5±3.6) d], the difference was statistically significant (t=2.960, P< 0.05); the wound infection score of the observation group was (2.75±0.44) scores 7 days after febridement, compared with that of the control group [(2.55±0.51) scores], the difference was not statistically significant (t=-1.165, P> 0.05); the wound infection score of the observation group was (1.60±0.26), (0.80±0.19) scores at 14, 21 days after debridemen, which were significantly lower than those in the control group [(2.35±0.67), (1.25±0.97) scores], the difference were statistically significant (t=4.156, 3.244; P< 0.05); there was no significant fluctuation in the preoperative and postoperative liver function, renal function, coagulation, blood routine test indexes of the two groups.

Versajet Ⅱ hydrosurgery system debridement can better clear the necrotic tissues, control the infection of the wounds, shorten the healing time of the wounds and it is safe and effective in the treatment of deep partial-thickness burns.