Primary closure of incised wounds must be done within
• Primary suture:
−− Clean wounds
−− Selected contaminated wounds after thorough wound toileting and debridement
• Delayed primary suture:
−− Heavily contaminated wounds
−− Wounds in which wound toileting has been delayed for 6–8 hours
• Left open to heal by secondary closure
2 hrs
4 hrs
6 hrs
12 hrs