Abstract
Aim
European population is ageing concurrently with an increase number of arthroplasties. Prosthetic joint infection (PJI) in the elderly is considered more severe. The aim of this study is to describe PJI's management of patients over 79 years of age.
Methods
We conducted a retrospective study including all patients aged over 79 years old consulting for a suspected hip or knee PJI in our community hospital where a complex bone and joint unit is present.
Results
From 2007 to 2015, among the 366 patients who consulted for a PJI suspicion, 44 were older than 79. In this group, median age was 81.5 and 52% were women. A significant comorbidity was present in 24 patients among them 9 were diabetic. Location of suspected PJI was hip for 24 patients and 52% of the patients had a PJI background. Median time from the first arthroplasty was 8 years, however 17 had already an exchange. We classified the presentation as early (before 3 months after surgery, n=7), delayed (3 to 24 months, n=9) and late (more than 24 months, n=28). Pain was the first symptom, 9 presented fever and 10 had a sinus tract communication. Median C-reactive protein rate was 64 mg/l. Pre-operative synovial fluid analysis was performed in 34 patients, the concordance with intra-operative samples was 44%. A surgery was performed in 86% of the patients corresponding in five retentions, 17 one-time and 13 two-time exchange, 2 arthrodesis and one resection of arthroplasty. Coagulase-negative Staphylococcus (n=14), Staphylococcus aureus (n=10) and Enterobacteriaceae (n=5) were the principal microorganisms identified. Antibiotherapy median duration was 10 days for intravenous regimens and 45 days for total treatment. We noted 4 catheter-related infections and 9 side effects of antibiotics. A prolonged antibiotic suppressive therapy was performed for 8 patients (18%). With a median time of follow-up of 21.5 months, we notified 13 failures (30%) and 5 deaths (11%). After the episode, 5 patients could not standup, a walking stick was necessary for 11 patients, 2 for 5 patients while 13 recovered a relatively good autonomy.
Conclusion
PJI in elderly people is a severe complication with a significant morbidity but palliative treatment is not the first alternative. We showed acceptable outcomes with more invasive managements. These data need to be compared with younger population in a second analysis.
