Application of constrained implants hip arthroplasty in patients with hip neuromuscular disease

Abstract Background: It is well known that neuromuscular diseases increase the risk of complications after hip replacement.The purpose of this study was to investigate the clinical manifestation and survival rate of total hip arthroplasty (THA) with constrained implants in inpatients with neuromuscular diseases. Method: A retrospective study evaluated the results of 17 THA in 17 patients with hip neuromuscular disease from April 2018 to June 2020. The average age at the time of operation was 66.71 years (33-86 years). The average follow-up time was 34.44 months (25-50 months). All surgery were operated through posterolateral approach. These were cementless implants. Result: The incisions of all cases healed in one stage, without infection, injury of important nerves, blood vessels and other tissues, loosening of joint prosthesis and deep venous thrombosis of lower limbs. One of the patients developed a new cerebral infarction at postoperative, which affected the contralateral limb movement and seriously affect the postoperative efficacy observation. The others were followed up for 25 months to 50 months, with an average of (34.44±8.05) months. All patients underwent THA with constrained implants. The hip joint function was evaluated according to Harris Hip score standard, excellent in 2 cases, good in 12 cases and poor in 2 cases. Conclusion: THA combined with constrained implants has been shown to be effective in reducing the risk of dislocation and enhancing stability for patients with neuromuscular disease.