Prosthetic joint replacement is more commonly done in the elderly group of patients due to an increase pathology related to joint degeneration that comes with age. In this age group is also more frequent having underling condition that may predispose to a prosthetic joint infection. Also, the pharmacological intervention in those patients may play an important role as a risk factor for infection after joint replacement surgery. The use of oral anticoagulants seems to be particularly increased in elderly patients but there aren't enough data published to support an association between prosthetic joint infection and the use of oral anticoagulants. Identifying risk factors in elderly patients age >75 years old with a special focus on the oral anticoagulation therapy is the aim of the study. In a retrospective study from 2011 till 2018 all the patients >75 years old with knee and hip replacement surgery have been review looking for acute prosthetic infection and risk factors that may be predispose to it. Patients with previous surgery or any other mechanical complication that needed intervention on the same area have been excluded.Aim
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