The Ilizarov technique in the management of haemophilic knee flexion contracture.

INTRODUCTION: The Ilizarov technique has the potential to be an attractive option for severe knee flexion contracture (KFC) patients with a high risk of bleeding. However, studies on this technique in the management of haemophilic KFC are scarce. AIM: The purpose of this study was to review and analyse the results of the Ilizarov technique in correcting haemophilic KFC and to evaluate the safety and efficacy of this technique. METHODS: Twelve male haemophilia patients with severe KFC who underwent distraction treatment using the Ilizarov technique from June 2013 to April 2019 were included in this study. The hospital day, flexion contracture, range of motion (ROM) of the knees, complications and functional outcomes were recorded and analysed. Functional outcomes were evaluated according to the Hospital for Special Surgery (HSS) knee scores of the preoperation, end of distraction and last follow-up. RESULTS: The average preoperative flexion contracture and range of motion (ROM) of the knees were 55 ± 15° and 66 ± 18°, respectively. The average preoperative HSS knee score was 47 ± 5. The average duration of follow-up was 75.5 ± 30.1 months. All flexion contractures achieved full correction (≤5°) at the end of distraction, and the flexion contracture significantly decreased to 6 ± 5° at the last follow-up (p < .0001). The ROM of the knees was significantly increased at the last follow-up compared with that before distraction treatment (p < .0001). The HSS knee scores at the end of distraction and at the last follow-up were both significantly higher than the preoperative HSS knee score (p < .0001). No major complications were encountered. CONCLUSIONS: This study provided evidence for the safety and effectiveness of Ilizarov technique plus physical therapy in the management of haemophilic KFC and accumulated clinical experience for the proper application of this technology.