关键词: 应用解剖, 　髂骨螺钉, 　骨盆, 　腰骨盆固定, 　手术

Abstract:

Objective　To observe the location of the pelvic vessels and nerves on the pelvic sides, measure the vertical distance from vessels and nerves to pelvic sides to  give a light on the surgical procedures.　Methods　In accordance with the rules and regulations of the university, we used 12 embalmed cadaveric pelvises (6 male, 6 female) without any gross structural abnormalities to guarantee the conformity among anatomic measurement. All specimens underwent simulated surgery in the ventral decubitus. K-wire was drilled from the posterior superior iliac spine to the anterior inferior iliac spine and the spatial relation can be observed between the wire and the vessels and nerves. At last, the dangerous region on the pelvic wall can be located while the wire was drilled.　Results　The dangerous region was located on the lateral wall of pelvic and inguinal region. The K-wire may stick into acetabulum if the drilling angle is smaller. On the other hand, the obturator artery, obturator nerve and deep iliac circumflex artery will be injured while the drilling angle was larger or the screw is longer.　Conclusions　The screw can be implanted safely from posterior superior iliac spine to anterior inferior iliac spine with a suitable drilling angel and length. Importantly, the dangerous region is located on the lateral wall of pelvic and inguinal region.

Key words: Applied anatomy;　Ilium screw;　Pelvic morphometry;　Spinal-pelvic instrumentation; , Operation