Topical Heparin for Prevention of Hypertrophic Scarring in Split-Thickness Skin Graft Donor Sites

Intervention Description: Donor site of STSG treated with standard dressing. Wound is cleaned, paraffin gauze applied, covered with gauze pieces and bandaged. Dressing is removed on the 10th post-operative day, or earlier if excessive exudate is present. Pain and wound healing monitored per standard care protoco

Intervention Description: Donor site of STSG treated with heparin dressing. 5 ml of 5000 IU/ml heparin is diluted in 50 ml normal saline to produce 500 IU/ml concentration. Gauze is soaked in this solution and applied to donor site immediately after graft harvest. Dressing remains in place until 10th post-operative day unless clinical indication requires earlier change. Pain, wound healing, and hypertrophic scarring assessed during follow-up.