Hemorrhoid
Doppler-guided ligation of hemorrhoidal arteries (DG-HAL/RAR or THD) has been recently purposed as a safe and relatively painless alternative to hemorrhoidectomy. A special ultrasound device is applied to identify the arteries that supply the hemorrhoids. The surgeon will then will the ligate them, cutting the blood supply and preventing further problems. However, the procedure is associated with a high recurrence rate.