The impact of urgent intervention on the neurologic recovery in patients with thoracolumbar fractures.

ABSTRACT

BACKGROUND: We carried out an observational longitudinal retrospective study between 2000 and 2009 in 28 patients who underwent surgery for unstable vertebral fractures with neurologic deficits. METHODS: For the statistical analysis, we used the Chi2-test to compare proportions in independent groups and the exact Fisher test and the Wilcoxon test for repeated measures, and we compared the mean values using the Mann-Whitney U test at a significance level of P<0.05. Timing to surgical intervention (urgent ≤8 vs. >8 h), and neurologic status using the American Spinal Injury Association (ASIA) Impairment Scale at baseline and at the end of follow-up were assessed. We tested the ASIA score improvement at the end of follow-up using multiple regression analysis, adjusted by variables such as ISS, timing of intervention, location, approach and type of fracture. RESULTS: Twenty-eight patients were included in the analysis. Of the total, 11 (39.2%) underwent surgery urgently (≤8 h) and 17 (60.8%) in >8 h. The mean difference in the neurologic improvement in all patients was 0.97 (95% CI, 0.51-1.42) and was statistically significant (P=0.001). The mean difference in the neurologic improvement in patients with incomplete lesions was 1.59 (95% CI, 1.01-2.17, P=0.001). In these patients, the mean improvement for those intervened in less than 8 h was 1.73 compared to those operated on after more than 8 h (mean improve 0.47) with a difference statistically significant (P=0.007). CONCLUSIONS: Urgent surgery was associated with neurologic improvement in patients with spinal cord injury (SCI). This improvement was mainly observed in patients with an incomplete lesion.