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Predictors of mortality in chronic subdural hematoma evacuation

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Abstract

Chronic subdural hematoma (cSDH) is one of the most common types of intracranial hemorrhages, particularly in the elderly. Despite extensive research regarding cSDH diagnosis and treatment, there is conflicting data on predictors of postoperative mortality (POM). We conducted a large retrospective review of patients who underwent a cSDH evacuation at a single urban institution between 2015 and 2022. Data were collected from the electronic medical record on prior comorbidities, anticoagulation use, mental status on presentation, preoperative labs, and preoperative/postoperative imaging parameters. Univariate and multivariate analyses were conducted to analyze predictors of mortality. Mortality during admission for this cohort was 6.1%. Univariate analysis showed the mortality rate was higher in those presenting with a history of dialysis. In addition, those who presented with altered mental status, were intubated, and lower GCS scores had higher rates of POM. Usage of Coumadin was correlated with higher rates of POM. Examination of preoperative labs showed that patients who presented with anemia or thrombocytopenia had higher POM. Imaging data showed that cSDH volume and greatest dimension were correlated with higher rates of POM. Finally, patients that were not extubated postoperatively had higher rates of POM. Multivariate analysis showed that only altered mental status and being not being extubated postoperatively were correlated with a higher risk of mortality. In summation, we demonstrated that altered mental status and failure to extubate were independent predictors or mortality in cSDH evacuation. Interestingly, patient age was not a significant predictor of mortality.

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Acknowledgements

The authors would like to thank all the staff at the Montefiore Department of Neurosurgery and Anesthesiology for their help and cooperation.

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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Rahman Sayed, Aroosa Zamarud, and Suzanne Gross. Mustufa Babar, Mudaser Basam, Rafael De La Garza Ramos, Ryan Holland, Jinu Kim, Samuel Rupp, Matthias Eikermann, Linda Nie, and Gagandeep Mudhar assisted in data collection. The project was supervised by Yaroslav Gelfand and Reza Yessari and they contributed in editing the final manuscript. The first draft of the manuscript was written by Rahman Sayed and all authors commented on previous versions of the manuscript. Linda Nie and Gagandeep Mudhar assisted in editing the manuscript. All authors read and approved the final manuscript.

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Correspondence to Rahman Sayed.

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This study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the Ethics Committee of Albert Einstein College of Medicine (IRB: 2022-13861 2/23/2022).

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Previously presented as a poster at the AANS Annual Scientific Meeting, April 21 to 24, 2023, Los Angeles, California.

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Sayed, R., Gross, S., Zamarud, A. et al. Predictors of mortality in chronic subdural hematoma evacuation. Neurosurg Rev 46, 318 (2023). https://doi.org/10.1007/s10143-023-02213-y

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