Abstract
Study Design: A retrospective single-center study.Background: Subarachnoid hemorrhage (SAH) is a rare complication secondary to cerebrospinal fluid (CSF) leakage during spinal surgery, but the specific cause of the bleeding is still unclear. Objective:In this study, we studied cases of acute SAH after spinal surgery to find the related risk factors for bleeding.Methods: A total of 441 patients with CSF leakage who underwent spinal surgery in [BLINDED FOR REVIEW] from 2011 to 2020 were retrospectively analyzed. According to whether postoperative SAH occurred, they were divided into SAH group and Control group. By comparing the two groups of demographic data, past history, imaging data, intraoperative findings, perioperative complications, treatment conditions to find the risk factors of SAH, to provide guidance for the prevention of SAH after spinal surgery.Results: In SAH group, 17 cases (73.9%) had preoperative hypertension and 3 cases (13.0%) had diabetes. The intraoperative CSF leakage was about 118.4±56.9 ml. The mean postoperative drainage was 15.4±5.8 ml/h; Compared with SAH group, Control group had 123 cases (29.4%) with hypertension before operation, 40 cases (9.6%) with diabetes, intraoperative CSF leakage was about 76.3±23.0ml, and the mean postoperative continuous drainage 9.7±2.1ml/h. Binary logistic regression analysis showed that hypertension, intraoperative CSF leakage, and postoperative CSF continuous drainage speed are related to SAH. Conclusion: The rapid leakage of CSF caused by the rupture of the dural sac during operation and the rapid drainage of CSF after surgery are closely related to the occurrence of such complications. In addition, hypertension is a related factor of SAH during spinal surgery.