Surgical Infection Prevention and Management

General Principles

Antibiotic prophylaxis is essential for preventing post-operative infections in contaminated or potentially contaminated surgical procedures, with administration recommended 30-60 minutes before incision and generally discontinued within 24-48 hours after surgery to maximize effectiveness while minimizing antibiotic resistance, as supported by the American Academy of Orthopaedic Surgeons and the Infectious Diseases Society of America 1
Surgical wounds provide a favorable environment for bacterial proliferation, and surgery induces immune defense anomalies that increase infection risk, particularly when foreign materials are implanted, with higher infection risk requiring meticulous prophylaxis 1
Antibiotic-coated implants have demonstrated safety in clinical applications, as reported by 2

For clean procedures with low infection risk, prophylaxis may not be necessary unless foreign material is implanted, whereas for clean-contaminated or contaminated procedures, prophylaxis is strongly recommended with appropriate antibiotic selection, as recommended by 3
The American Academy of Orthopaedic Surgeons and the Infectious Diseases Society of America recommend single-drug regimens for contaminated wounds, including piperacillin-tazobactam, ertapenem, ticarcillin-clavulanate, imipenem-cilastatin, and meropenem, and combination regimens, including ceftriaxone + metronidazole, ciprofloxacin + metronidazole, and levofloxacin + metronidazole 4, 5

For burn patients, systemic antibiotic prophylaxis in the first 4-14 days significantly reduced mortality, and limited perioperative prophylaxis reduced wound infections but not mortality, as reported by 2
The American Academy of Orthopaedic Surgeons recommends systemic antibiotics with cefazoline or clindamycin for all types of exposed fractures, with additional gram-negative coverage using piperacilina-tazobactam for type III fractures, and the duration of antibiotic prophylaxis should be limited to 24 hours maximum for Type I/II fractures, and up to 48 hours maximum for Type III fractures 5
Local antibiotic strategies, such as vancomycin powder, tobramycin-impregnated beads, and gentamicin-coated nails, can be considered as beneficial adjuncts, especially for Type III fractures, as recommended by the American Academy of Orthopaedic Surgeons 5

Debridement should be performed within the first 24 hours, with more urgent attention for certain types of fractures, and thorough debridement of devitalized tissue, copious irrigation with normal saline, and nail bed repair using absorbable fine sutures (6-0 or 7-0), as recommended by the American Academy of Orthopaedic Surgeons 5
Manage fractures with minimal displacement or displaced fragments, considering K-wire fixation if unstable, and elevate the extremity to reduce swelling, apply appropriate splinting to protect the repair, and achieve wound closure within 7 days from injury, as recommended by the American Academy of Orthopaedic Surgeons 5

Obtain appropriate cultures before starting antibiotics, with deep tissue specimens preferred over surface swabs, as recommended by Clinical Microbiology and Infection 6
Consider MRSA coverage when patient has prior history of MRSA, local prevalence of MRSA is high, or infection is clinically severe, as recommended by the Infectious Diseases Society of America 7
Adjust therapy based on culture results, switching to targeted therapy once culture and sensitivity results are available, as recommended by the American Academy of Orthopaedic Surgeons and the Infectious Diseases Society of America 7, 5

The following antibiotic regimens are recommended:

Type of Injury	Recommended Antibiotic Regimen
Clean, non-contaminated wounds	No prophylactic antibiotics indicated [8]
Minor contamination (Gustilo-Anderson grade I and II open fractures)	3 days of antibiotic therapy [8]
Severe contamination (Gustilo-Anderson grade III wounds)	Up to 5 days of antibiotic therapy [8]
High-velocity injuries	48-72 hours of antibiotic therapy [8]
High-velocity gunshot wounds	48-72 hours of antibiotic therapy [8]
Power washer injuries	3-5 days of antibiotic therapy depending on severity [8]

Treatment should be re-evaluated after 48-72 hours, with possible adjustment of antibiotic therapy based on culture results, additional surgical debridement, or imaging studies to assess for possible osteomyelitis or abscess formation, as recommended by the American Academy of Orthopaedic Surgeons and the Infectious Diseases Society of America 8, 9, 10

Extended antibiotic therapy without indication does not reduce infection rates but increases risks of antibiotic resistance, C. difficile infections, and allergic reactions, and should be avoided, as recommended by the American Academy of Orthopaedic Surgeons and the Infectious Diseases Society of America 5, 2
Vancomycin dosing should be adjusted based on actual body weight and renal function, with slow infusion to avoid the "red man syndrome", as recommended by Clinical Microbiology and Infection 11, 2