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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