Objective:To explore the effect of the intervention model based on the theory of knowledge, belief and action on the prevention of dislocation of prosthesis after hip replacement by nurses, so as to provide guidance for the management of prosthesis dislocation prevention after hip replacement.Methods:The patients were from Shenzhen Luohu People′s Hospital. From January to March 2018, 82 patients who underwent artificial total hip arthroplasty were set as the control group and received routine care. The 76 patients who underwent artificial total hip arthroplasty from May to July 2018 were set as the observation group, and the intervention model based on the theory of knowledge, belief and action was adopted. The incidence of prosthesis dislocation was compared between the two groups at 1, 3, 6 months after operation. At the same time, the Harris hip function score and the activity of daily living (ADL) score were compared between the two groups at the time of discharge, 1, 3, 6 months after operation.Results:The total incidence of prosthesis dislocation at 6 months was 1.32% (1/76) and 9.76% (8/82) in the experimental group and the control group, respectively, and the difference was statistically significant ( χ2=5.23, P<0.05). At discharge, there was no significant difference in the Harris hip function score and ADL scores between the two groups ( P>0.05). The Harris hip function score and ADL scores at 1, 3, 6 months after operation were (80.05 ± 6.72), (88.76 ± 5.84), (94.07 ± 4.43) points and (55.72 ± 16.61), (63.55 ± 14.55), (75.39 ± 12.27) points in the observation group, and (74.41 ± 6.26), (84.48±5.97), (89.30 ± 5.32) points and (47.13 ± 19.77), (56.71 ± 16.01), (63.96 ± 13.78) points in the control group, the differences were statistically significant ( t values were -6.08--2.80, all P<0.05). Conclusions:The intervention model based on the theory of knowledge, belief and action can effectively improve the Harris hip function score and ADL score of patients at 1, 3, 6 months after hip replacement, and reduce the incidence of prosthetic dislocation.

Objective:To develop the Orthopedic Nurses' Prevention of Prosthesis Dislocation after Total Hip Arthroplasty Scale based on the knowledge, attitude and practice model, and to test its reliability and validity.Methods:Guided by the theory of knowledge, attitude and practice, on the basis of the establishment of a research group, literature review, expert consultation and pre-investigation, the Orthopedic Nurses' Knowledge, Attitude and Practice Scale for Prevention of Prosthesis Dislocation after Total Hip Arthroplasty was formed. From October 16, 2019 to March 15, 2020, 272 orthopedic nurses from 15 hospitals in Shenzhen were selected for survey by convenience sampling. Exploratory factor analysis, internal consistency test and other methods were used to test the reliability and validity of the scale.Results:The Orthopedic Nurses' Knowledge, Attitude and Practice Scale for Prevention of Prosthesis Dislocation after Total Hip Arthroplasty included 3 dimensions of knowledge, attitude and practice, with a total of 32 items. Four common factors were extracted by exploratory factor analysis, and the cumulative variance contribution rate was 57.206%. The Cronbach's α coefficients of the three dimensions of knowledge, attitude, and practice were 0.976, 0.897, and 0.956, the test-retest reliability coefficients were 0.701, 0.852 and 0.903, and the content validity index were 0.89, 0.91 and 0.93, respectively.Conclusions:The Orthopedic Nurses' Knowledge, Attitude and Practice Scale for Prevention of Prosthesis Dislocation after Total Hip Arthroplasty has good reliability and validity, and can be used as an evaluation tool for nurses' knowledge, attitude, and practice survey on prosthesis dislocation after total hip arthroplasty.