Femoral neck fractures in old age treated with hemiarthroplasty : Effects of preoperative waiting time and timing of surgery on the risk of periprosthetic infections.

BACKGROUND: Hemiarthroplasty is an established treatment for femoral neck fractures (FNF) in old age; however, approximately 20-30% of patients die within 1 year after surgery. Periprosthetic joint infections (PJI) are one of the severest complications and associated with a high mortality rate. In this retrospective study of aged patients with FNF treated with hemiarthroplasty, the incidence of PJI was evaluated with respect to the influence of the delay to and timing of surgical treatment.

PATIENTS AND METHODS: The data of patients suffering from FNF and admitted to this hospital between January 2012 and December 2014 were evaluated. Demographic data, timing of surgery, intraoperative complications, PJI and other general complications, hospitalization time and mortality were recorded.

RESULTS: In this study 178 patients were included in the follow-up (114 women and 64 men). The median age of the patients was 83 years (range 55-105 years). The rate of PJI was 3.9% (7/178) and mortality was 5.6% (10/178). Patients with PJI after hemiarthroplasty had a significantly longer hospital stay (17 vs. 10 days, p < 0.001) and a higher mortality (28% vs. 4.7%). No significant differences were found between the groups with respect to the time from admission to surgery.

CONCLUSION: The occurrence of PJI after hip joint fractures treated with hemiarthroplasty in aged patients is associated with a significant increase in mortality. Risk factors include a longer surgery time, diabetes, intraoperative complications, postoperative bleeding and wound healing disorders. Surgical treatment within the first 24 h should be aimed for but not at the expense of adequate patient preparation or neglecting the patient's individual risk factors.