Abstract: Objective To investigate the effect of white noise on sleep quality in patients undergoing total knee arthroplasty.Methods A total of 197 patients undergoing total knee arthroplasty in our department were selected as the study subjects and randomly divided into control group and experimental group.The control group was treated with normal perioperative treatment and was in normal environment.In the experimental group,in addition to the conventional perioperative treatment measures,white noise intervention was used to compare the postoperative psychological state and sleep quality of the two groups.Results Patients with total knee arthroplasty had a high level of anxiety before intervention,the Hamilton Anxiety Scale score was 32.34±2.49 in the control group and 32.11±2.45 in the experimental group,the difference was not statistically significant(t=0.6534，P>0.05).After intervention,compared with the control group,the score of Hamilton Anxiety Scale in the experimental group decreased significantly32.68±2.24 in the control group and 14.26±1.97 in the experimental group,the difference was statistically significant(t=61.37,P<0.05).Pittsburgh sleep quality index score showed that there were sleep disorders in both groups,before intervention,the difference was not statistically significant,the control group score was 9.21±1.87,the experimental group was 9.16±1.45,(t=0.2103,P>0.05);After intervention,sleep quality was improved in both groups.However,the improvement effect of sleep quality in the experimental group was better than that in the control group,with a score of 8.45±1.39 in the control group and 5.22±1.63 in the experimental group(t=14.93,P<0.05).Conclusion The use of white noise can effectively improve the mental state and sleep quality of patients undergoing total knee arthroplasty.

Key words: white noise, total knee arthroplasty(TKA), sleep quality, anxiety