Risk factors for postoperative cerebrospinal fluid leakage after intradural spine surgery.

Jesse, Christopher Marvin; Schermann, Helena; Goldberg, Johannes; Gallus, Marco; Häni, Levin; Raabe, Andreas; Schär, Ralph T (2022). Risk factors for postoperative cerebrospinal fluid leakage after intradural spine surgery. World neurosurgery, 164, e1190-e1199. Elsevier 10.1016/j.wneu.2022.05.129

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OBJECTIVE

Well-defined risk factors for cerebrospinal fluid leakage (CSFL) following intradural spine surgery are scarce in the literature. The aim of this study was to identify patient and surgery related risk factors and the incidence of CSFL.

METHODS

For this retrospective cohort study, we identified consecutive patients who underwent intradural spine surgery between 2009 and 2021 at our department. Primary endpoint was the incidence of clinically or radiologically proven CSFL. The impact of clinical and surgical factors on occurrence of CSFL was analyzed.

RESULTS

In total, 375 patients (60.3% female, mean age 54 ± 16.5 years) were included. Thirty patients (8%) had postoperative CSFL and thereby a significantly higher risk for wound healing disorders (OR 24.9, CI 9.3-66.7) and surgical site infections (SSIs; OR 8.4, CI 2.6-27.7) (p<0.01 for each). No patient-related factors were associated with CSFL. Previous surgery at the index level correlated significantly with postoperative CSFL (OR 2.76, CI 1.1-6.8, p=0.03) in multivariate analysis. Furthermore, patients with intradural tumors tended to have a higher risk for CSFL (OR 2.3, CI 0.9-5.8, p=0.07). Surgery related factors did not influence occurrence of CSFL. Surgery on the thoracic spine had a significantly lower postoperative CSFL rate than surgery on the cervical or lumbar spine (OR -2.5, CI 1.3-4.9, p=0.02).

CONCLUSIONS

Our study found no modifiable risk factors for preventing CSFL after intradural spine surgery. Patients with previous surgery at the index level were at higher risk for CSFL. CSFL resulted in significantly more wound healing disorders and SSIs necessitating further therapy.

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