To investigate the clinical effect of multifunctional debridement instrument in the treatment of chronic wounds.

Sixty patients with chronic wounds admitted to the Department of Burns, Heilongjiang Provincial Hospital from October 2016 to October 2018 and meeted the inclusion criteria were divided into treatment group and control group according to the random number toble method, 30 cases in each group. After the patients in the control group were properly removed from the wound necrotic tissue, the multifunctional ultrasonic debridement instrument was performed twice a week for 2 weeks and 4 times. The patients in the control group were treated with traditional bedside debridement and changed dressing every other day. The wounds sample of the two groups were taken for examination before and 12 days after the first debridement. The number of wound bacteria, wound bacterial clearance rate and wound DESIGN-R score before and 12 days after the first debridement treatment in the 2 groups were recorded. Data were processed with t test and chi-square test.

Before the first debridement treatment, Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli and Pseudomonas aeruginosa were quantitatively detected on the wound surface of the patients in the two groups, the differences were not statistically significant (with P values above 0.05). At 12 days after treatment, there were statistically significant differences in the number of bacterial on the wound surface between the two groups (with P values below 0.05), the bacterial clearance rates of the Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli and Pseudomonas aeruginosa in the treatment group were (77.66±4.18)%, (76.12±5.14)%, (80.69±4.92)%, (75.95±3.16)%, and the control group were (42.64±2.37)%, (37.14±2.68)%, (27.12±3.17)%, (41.77±2.59)%, the differences were statistically significant (t=5.39, 3.97, 3.87, 5.37; with P values below 0.05). There were no significant differences in the DESIGN-R scores between the two groups before treatment (with P values above 0.05). The total score was (13.60±3.28) points in the treatment group 12 days after treatment, which was (20.33±4.79) points in the control group, the difference between the two groups was statistically significant (t=6.14, P<0.05).

The multifunctional debridement instrument for ultrasonic debridement has a better clinical effect in treating chronic wounds, which is worthy of clinical treatment.