Aloplasty of an ankylosed knee in a patient with severe haemophilia A

The goal of this report is to describe a case of knee arthroplasty in a patient with over a 20 year long history of ankylosis of the left knee joint in the course of severe haemophilia A. Clinical and functional conditions were assessed by means of a Knee Society Score (KSS); pain intensity by Visual Analogue Scale (VAS); and intensity of degeneration of bone forming the joint by means of the Kellgren-Lawrence Scale. ROM of the knee joint before and after the operation was measured. We used hinge prosthesis of S-ROM by De Puy to restore the knee joint. As a result of the operation we got axial alignment of the limb. During two years of clinical follow-up, the patient achieved increasing mobility of the operated knee, full extension, and 80 degrees of active flexion. There were no radiological signs of loosening of the implant. The patients' functional capabilities improved significantly; and pain occurred only occasionally.