Wound closure: primary, delayed or second intention
4-year-old cat presenting with a 6 cm laceration on the lateral thigh, caused by getting caught on a metal fence about 10 hours ago. The edges are dirty, with soil and some devitalised tissue, with no bone exposure.
What is the most appropriate approach?
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A. Immediate primary closure after lavage, because there is plenty of skin available in the area
Primary closure is reserved for clean or minimally contaminated, recent wounds. Closing a dirty wound with devitalised tissue promotes infection and dehiscence.
B. Cover it with antibiotic ointment and let it heal by second intention without debridement
Second-intention healing is a valid option, but not without first removing the devitalised tissue and debris, which perpetuate infection.
C. Lavage and debridement, open management with dressings for a few days and delayed primary closure once the wound bed is healthy
Correct. A contaminated wound more than 6–8 hours old is first managed open: lavage, debridement and dressings. Once there is no infection or necrotic tissue (usually at 3–5 days), it is closed before granulation tissue forms.
D. Wait for a full granulation bed to form in order to perform a skin graft
Grafts are reserved for defects that cannot be closed due to lack of skin, especially on the distal limbs. Here there is enough skin for delayed closure.
lightbulb Key takeaway
Classify the wound by time and contamination: clean and recent, primary closure; contaminated or more than 6–8 hours old, open management and delayed primary (3–5 days) or secondary closure (after granulation). In cats, second-intention healing is slower than in dogs.
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Updated: October 31, 2026 · Educational content for veterinary professionals. It does not replace current clinical guidelines or the judgement of the attending veterinarian.