Postoperative infections following total knee replacement: an epidemiological study

Area of Science:

• Orthopedic Surgery
• Infectious Disease Prevention
• Pharmacology

Background:

• Postoperative infections are a significant complication following total knee replacement (TKR).
• Optimizing antimicrobial prophylaxis is crucial for reducing infection rates and improving patient outcomes.
• Previous studies highlight varying efficacy of different prophylactic regimens.

Purpose of the Study:

• To prospectively evaluate the incidence of postoperative infections after total knee replacement (TKR).
• To identify risk factors associated with these infections.
• To assess the safety and efficacy of regional teicoplanin antimicrobial prophylaxis.

Main Methods:

• Prospective study of 217 patients undergoing TKR from January 1991 to June 1997.
• Regional teicoplanin prophylaxis (400 mg) used in 95% of cases; systemic prophylaxis (800 mg) in 5%.
• 2-year follow-up to monitor for infectious complications and adverse effects.

Main Results:

• Overall infection rate was 2.9% (8/277), including 4 superficial and 4 deep infections requiring prosthesis removal.
• Higher infection rates were observed in patients with prior surgery on the same knee (p=0.0005) and in diabetic patients (p=0.01).
• Staphylococci were the most common pathogens; Escherichia coli was isolated in 3 cases with prior prosthesis implantation.

Conclusions:

• Regional teicoplanin prophylaxis demonstrates safety and value in preventing TKR infections.
• Patients with risk factors, such as previous surgery or diabetes, require careful consideration.
• Prophylactic regimens active against gram-negative bacteria may be necessary for high-risk TKR patients.