Role of the surgical position in the development of postoperative low back pain.

The aetiology of postoperative back pain is contentious. Although the role of the surgical position has not been fully established, the lithotomy position is often implicated. In order to investigate this common surgical complication further, a prospective study has been performed on 101 hysterectomy patients. The supine (52 patients) and the lithotomy (49 patients) positions have been compared and contrasted within this series. Ten patients in the supine group (20%) and seven patients in the lithotomy group (14%) developed postoperative low back pain (p > 0.1). The mean duration of symptoms postoperatively for the whole series was 7 months. We conclude that postoperative backache is an under-estimated complication of surgery and that this problem occurs equally whether the supine or the lithotomy positions are used.