Abstract
Introduction: Acute subdural hematoma (aSDH) removal is one of the most commonly
performed procedure in neurosurgery. Complications of those surgeries which require reoperation
are associated with higher risk of poor treatment outcome. Th erefore we decided to analyse potential
factors which might be associated with risk of early reoperation among patients who underwent
aSDH surgery.
Material and methods: We retrospectively analysed 328 patients treated due to aSDH. From
their medical records we obtained detailed medical history. Early reoperation was defi ned as reoperation
during the same hospital stay. To determine the potential predictors of early reoperation we used univariate
and multivariate logistic regression analyses.
Results: A total of 20 (6.09%) patients required early reoperation. Th ose patients had signifi cantly
higher International Normalized Ratio (INR) upon admission (1.96 ± 2.55 vs. 1.26 ± 0.50; p <0.01) and
signifi cantly higher Prothrombin Time (PT) upon admission (21.84 ± 27.10 vs. 13.40 ± 3.45; p <0.01).
In multivariate logistic regression analysis aft er adjustment for all possible confounders higher INR
(OR: 1.762; 95% CI: 1.017–22.840; p = 0.045) remained independently associated with higher risk of early
reoperation among patients with aSDH.
Conclusions: Patients with higher INR and PT upon admission are at higher risk of early reoperation. Higher INR is independently associated with higher risk of early reoperation among patients with aSDH.
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