2Mohamed A Y, Ghaithi A, Langevin J M, et al. Causes and management of intestinal obstruction[J]. J R Coll Surg Edinb, 1997, 42: 21.
3Frager D, Rovno H D, Baer J W, et al. Prospective eveluation of conolic obstruction with computed tomngraphy[J]. Abdora Imaging, 1998, 23(2): 141.
4Taourel P G, Fabre Jm, Pradel J A, et al. Value of CT in the diagnosis and management of patients with suspected acute small bowel obstruction[J]. AJR, 1995, 165(5): 1187.