Evaluation of Free Flap Success Rates Before and After the Implementation of Three-Stage Scratch Test Assessment at Arifin Achmad General Hospital, Riau Province. Supervised by: Romy Deviandri, Ade Wirdayanto, Fakhrul Hendra. Introduction:Free flap reconstruction is a cornerstone procedure in managing complex defects caused by trauma or malignancy. Flap success is highly dependent on tissue vi…