ObjectiveTo explore the risk factors affecting the operation time of primary total knee arthroplasty(TKA) and revision of deep infection.

MethodsThe patients treated with TKA for the first time were included in the study.The risk factors and independent risk factors influencing the operation time of primary TKA and revision of deep infection were analyzed using the χ² test, Pearson correlation test and multivariate logistic regression.

ResultsThe results of multivariate analysis showed that the male, ASA grade Ⅲ~Ⅳ and body mass index >28 kg/m² were the independent factors affecting the operation time(P < 0.01), and the age ≥ 75 years, diabetes mellitus, albumin < 30 g/L, operation time ≥ 110 min and gender were the independent factors influencing the revision of deep infection after operation(P < 0.05 to P < 0.01).The correlation coefficients of age, diabetes mellitus, postoperative albumin and gender with deep infection revision were 0.287, 0.265, -0.297 and 0.302, respectively(P < 0.05).

ConclusionsThe male, ASA grade Ⅲ-Ⅳ, body mass index >28 kg/m² are the independent factors influencing the operation time of primary TKA, and the age ≥ 75 years, diabetes mellitus, postoperative albumin < 30 g/L, operation time ≥ 110 min and gender are the independent factors influencing the revision of deep infection.The operation time of primary TKA and revision of deep infection are the results of multiple factors, which should be fully identified in clinical work, and the targeted interventions should be formulated to improve the prognosis.