Hemorrhoidectomy and fistulotomy these two types of anal surgery are common surgeries in colon and rectal surgery division in Shuang Ho hospital. For these patients underwent surgical treatment, some surgeons used gauze with Bosmin for hemostasis and analgesia after surgery, and other surgeons used Gelfoam. These choices were often determined by surgeon's personal preference according to their experiences. Shuang Ho hospital has top three quantity of hemorrhoidectomy in Taiwan. So, a randomized controlled trial is conducted to evaluate the difference between hemostatic agents use after anal surgery.
To evaluate the hemostatic and analgesic effect of using gauze with Bosmin or Gelfoam after anal surgery.