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Appendix 1 Recommended preoperative surgical antimicrobial prophylaxis at the study institution

From: Optimal timing of surgical antimicrobial prophylaxis in laparoscopic surgery: a before-after study

Type of procedure Agents Dose Redosing interval, hour
Gastrectomy cefazolin 1–2 g 3–4
Cholecystectomy cefazolin
ampicillin/sulbactam
1-2 g
1.5-3 g
3–4
2–3
Appendectomy cefazolin + metronidazole
cefmetazole
ampicillin/sulbactam
1-2 g + 500 mg
1-2 g
1.5-3 g
3–4 + 8
2–3
2–3
Colorectal surgery cefazolin + metronidazole
cefmetazole
ampicillin/sulbactam
1-2 g + 500 mg
1-2 g
1.5-3 g
3–4 + 8
2–3
2–3
  1. NOTE. For patients with β-lactam allergy and renal failure, infectious disease consultation is recommended