Abstract: Operation duration has consistently been regarded as a important factor influencing the outcome of total knee arthroplasty (TKA).Prolonged operation time can give rise to an array of adverse events,ultimately leading to surgical failure,escalated healthcare expenses,and even jeopardizing patient survival.Numerous studies have demonstrated that prolonged operation time is linked with an augmented risk of postoperative complications.Recent investigations have revealed that extended operation duration can heighten the likelihood of postoperative pain,wound dehiscence,anemia and blood transfusion requirements,surgical site infection,sepsis,prolonged hospitalization and readmission rates；impact prosthetic longevity and patient survival rate.

Key words: total knee arthroplasty；operative time；complications；survival rate