| Short-term arm | Long-term arm |
---|---|---|
Mono-prophylaxis | Cefazolin 2–3 ga preop Cefazolin 2 g at wound closure/4 h after the preop dose No post-op antibiotics | Cefazolin 2–3 ga preop Cefazolin 2 g at wound closure/4 h after the preop dose Cefazolin 2 g q8h × 5 doses |
Combination prophylaxis | Cefazolin as above Vancomycin 1–1.5 gb preop No post-op antibiotics | Cefazolin as above Vancomycin 1–1.5 gb preop, repeated q12h × 3 doses |