This retrospective study of 137 Type III open tibia fractures at a Level 1 Trauma Center asked whether antibiotic timing independently predicts deep infection. It identified 66 minutes from injury as the critical threshold — and found that wound coverage beyond 5 days is an even stronger independent predictor.
The 66-minute threshold reframes open fracture care as a race against a closing window — not just a race to the OR.
When you see a Type III open tibia fracture, the most important intervention you cannot control is whether antibiotics were given in the field. Only half of patients in this modern trauma system arrived at the hospital within an hour of injury, making hospital-based administration within the efficacious window impossible for many.
This paper is why prehospital antibiotic protocols for open fractures deserve the same urgency as prehospital stroke or STEMI protocols. For Type IIIB injuries specifically, push for flap coverage within 3 days. Delay beyond that point carries a dramatically higher infection burden.
The counterintuitive finding: time to debridement within 24 hours did not predict infection. Antibiotic timing and wound coverage timing are the levers that matter.
This retrospective study of 137 Type III open tibia fractures at a Level 1 Trauma Center asked whether antibiotic timing independently predicts deep infection. It identified 66 minutes from injury as the critical threshold — and found that wound coverage beyond 5 days is an even stronger independent predictor.
The 66-minute threshold reframes open fracture care as a race against a closing window — not just a race to the OR.
When you see a Type III open tibia fracture, the most important intervention you cannot control is whether antibiotics were given in the field. Only half of patients in this modern trauma system arrived at the hospital within an hour of injury, making hospital-based administration within the efficacious window impossible for many.
This paper is why prehospital antibiotic protocols for open fractures deserve the same urgency as prehospital stroke or STEMI protocols. For Type IIIB injuries specifically, push for flap coverage within 3 days. Delay beyond that point carries a dramatically higher infection burden.
The counterintuitive finding: time to debridement within 24 hours did not predict infection. Antibiotic timing and wound coverage timing are the levers that matter.