PROSPECTIVE STUDY OF THE TREATMENT OF INFECTED HIP ARTHROPLASTIES WITH OR WITHOUT THE USE OF AN ANTIBIOTICLOADED CEMENT SPACER

Abstract

Purpose: Our purpose was to compare 2 methods of treatment of chronic infection in hip arthroplasties – with or without an antibiotic-loaded cement spacer.

Methods: In a prospective study, we treated 68 infected hip arthroplasties with discharging sinuses and bone loss, comparing 30 patients treated in 2 stages with-out the use of a spacer (control group) and 38 patients treated with a vancomycin-loaded spacer (study group). The average follow-up was 7 years (5–11.5 years). One patient died of unrelated causes 4 months after first-stage surgery and was excluded from the study.

Results: The 2-stage surgery without spacer controlled the infection in 66.7% of patients, and the 2-stage surgery using the spacer controlled it in 89.1% (P < 0.05). At last follow-up, the average Harris Hip Score increased from 19.3 to 69.0 in the control group versus 19.7 to 75.2 in the study group (P > 0.05). The average leg length discrepancy was 2.6 cm in the control group and 1.5 cm in the study group (P < 0.05). The patients treated with a spacer had better clinical results (81.5% of patients with good results against 60.0% for the control group)

Conclusion: The use of an antibiotic-loaded spacer in the 2-stage treatment of infected hip arthroplasties provides better infection control with good functional results and is superior to treatment in 2 stages without a spacer.

Level of Evidence: Therapeutic study, Level I-1.