Guideline for Antibiotic Prophylaxis in General Surgical Procedures
1. General Recommendations
- Cefazolin 2 g IV is the preferred prophylactic agent for most clean and clean‑contaminated general surgeries; for procedures requiring anaerobic coverage (e.g., colorectal surgery) cefoxitin 4 g IV or a ceftriaxone + metronidazole combination is recommended. 1, 2
- Prophylaxis should be limited to the operative period (maximum 24 h) and a single pre‑incision dose is standard; re‑dosing is required only if the procedure exceeds the drug’s half‑life (e.g., >4 h for cefazolin, >2 h for cefamandole/cefuroxime). 2, 1
2. Procedure‑Specific Recommendations
Clean Surgery – Hernia Repair with Mesh
- First‑line: Cefazolin 2 g IV administered as a slow infusion. Alternative agents are cefamandole 1.5 g IV or cefuroxime 1.5 g IV.
- Beta‑lactam allergy: clindamycin 900 mg IV + gentamicin 5 mg/kg/day.
- Re‑dose if surgery exceeds 4 h (cefazolin) or 2 h (cefamandole/cefuroxime).
- Duration: limited to the operative period only. 2, 3, 1
Biliary Surgery
- Target organisms: Escherichia coli, other Enterobacteriaceae, and Staphylococcus aureus.
- Single dose of the chosen agent with re‑dosing based on procedure length. 2, 3
Colorectal Surgery
- Cefoxitin 4 g IV (30‑min infusion) is recommended for bowel‑opening procedures; re‑dose 2 g if duration >2 h.
- Oral antibiotics the day before surgery should be combined with the IV prophylaxis.
- Beta‑lactam allergy: clindamycin 2100 mg IV + gentamicin 5 mg/kg/day.
- Target organisms: E. coli, Enterobacteriaceae, S. aureus, and anaerobic bacteria. 2, 4, 3
Bariatric Surgery (dose based on actual body weight)
- Gastric Band: Cefazolin 4 g IV (30‑min infusion); alternatives cefuroxime 3 g IV or cefamandole 3 g IV; re‑dose 2 g if >4 h; allergy regimen – vancomycin 30 mg/kg over 120 min.
- Gastric Bypass / Sleeve Gastrectomy: Cefoxitin 4 g IV preferred; re‑dose 2 g if >2 h; allergy regimen – clindamycin 2100 mg IV + gentamicin 5 mg/kg/day.
- Abdominoplasty: Cefazolin 4 g IV (actual weight); alternative cefuroxime 3 g IV. 2, 4, 5
Breast Surgery
- Mastectomy: Cefazolin 2 g IV single dose; re‑dose 1 g if >4 h.
- Reconstruction / Mammoplasty: Cefamandole 1.5 g IV or cefuroxime 1.5 g IV; re‑dose 0.75 g if >2 h; allergy regimen – clindamycin 900 mg IV + gentamicin 5 mg/kg/day.
- Simple Lumpectomy: No prophylactic antibiotics required. 3, 4, 5
Vascular Surgery
- Prophylaxis is mandatory even for clean vascular procedures because of the high morbidity of infection.
- Standard agent: Cefazolin 2 g IV.
- Given regardless of surgical approach (open or endovascular) and continued even if the patient is already receiving antibiotics for distal trophic disorders.
- Prosthetic grafts soaked in antibiotics must always be combined with IV prophylaxis; they are not used alone. 1
3. Timing and Administration
- Vancomycin must be infused over 120 min, with the infusion ending no later than the time of incision (ideally finishing 30 min before incision). 1, 6
- Overall prophylaxis duration is limited to the operative period (maximum 24 h). 1, 6
4. Management of Documented Beta‑Lactam Allergy
- Clindamycin 900 mg IV (add gentamicin as indicated by the specific procedure).
- Vancomycin 30 mg/kg infused over 120 min for procedures requiring gram‑positive coverage, suspected or proven MRSA colonization, re‑operation in MRSA‑prevalent units, or when the patient has received prior antibiotics. 1, 2, 6