Table I. Feasibility criteria of the ARU in the forearm free flap.

1)	The maximum width of the ARU must not exceed 50% of the total circumference of the forearm in the distal third
2)	The length of the flap must be equal to one third of the total length of the ARU
3)	The skin graft area must be an isoscele triangle with its base adjacent to the proximal side of the flap and an equal width
4)	The length of the triangle must be twice the axial length of the flap, corresponding to the 2/3 proximal of the ARU
5)	The apex of the ARU must not exceed the fold of the elbow in order to avoid retracting scars limiting the arm functionality