Abstract
Background
Withholding prophylactic anticoagulation from patients with aneurysmal subarachnoid hemorrhage (aSAH) before external ventricular drain (EVD) removal or replacement remains controversial. This study analyzed whether prophylactic anticoagulation was associated with hemorrhagic complications related to EVD removal.
Method
All aSAH patients treated from January 1, 2014, to July 31, 2019, with an EVD placed were retrospectively analyzed. Patients were compared based on the number of prophylactic anticoagulant doses withheld for EVD removal (> 1 vs. ≤ 1). The primary outcome analyzed was deep venous thrombosis (DVT) or pulmonary embolism (PE) after EVD removal. A propensity-adjusted logistic-regression analysis was performed for confounding variables.
Results
A total of 271 patients were analyzed. For EVD removal, > 1 dose was withheld from 116 (42.8%) patients. Six (2.2%) patients had a hemorrhage associated with EVD removal, and 17 (6.3%) patients had a DVT or PE. No significant difference in EVD-related hemorrhage after EVD removal was found between patients with > 1 versus ≤ 1 dose of anticoagulant withheld (4 of 116 [3.5%] vs. 2 of 155 [1.3%]; p = 0.41) or between those with no doses withheld compared to ≥ 1 dose withheld (1 of 100 [1.0%] vs. 5 of 171 [2.9%]; p = 0.32). After adjustment, withholding > 1 dose of anticoagulant versus ≤ 1 dose was associated with the occurrence of DVT or PE (OR 4.8; 95% CI, 1.5–15.7; p = 0.009).
Conclusions
In aSAH patients with EVDs, withholding > 1 dose of prophylactic anticoagulant for EVD removal was associated with an increased risk of DVT or PE and no reduction in catheter removal–associated hemorrhage.
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Data Availability
The data that support the findings of this study are available from the corresponding author upon reasonable request and institutional review board approval, as applicable.
Abbreviations
- aSAH:
-
Aneurysmal subarachnoid hemorrhage
- CCI:
-
Charlson Comorbidity Index
- DVT:
-
Deep venous thrombosis
- EVD:
-
External ventricular drain
- PE:
-
Pulmonary embolism
- POD:
-
Postoperative day
- SQH:
-
Subcutaneous unfractionated heparin
- VTE:
-
Venous thromboembolism
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Acknowledgements
We thank the staff of Neuroscience Publications at Barrow Neurological Institute for assistance with manuscript preparation.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Joshua S. Catapano, Stefan W. Koester, Parth P. Parikh, Kavelin Rumalla, Henry O. Stonnington, and Rohin Singh. The first draft of the manuscript was written by the aforementioned authors and all authors commented on subsequent versions of the manuscript. All authors read and approved the final manuscript.
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This retrospective cohort study was approved by the St. Joseph’s Hospital and Medical Center Institutional Review Board (Phoenix, Arizona).
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Informed consent for the study was waived due to the low risk to patients and the study’s retrospective nature.
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The authors have no personal, financial, or institutional interest in any of the drugs, materials, or devices described in this manuscript. No parts of this manuscript have been previously published or presented.
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Catapano, J.S., Koester, S.W., Parikh, P.P. et al. Association between external ventricular drain removal or replacement and prophylactic anticoagulation in patients with aneurysmal subarachnoid hemorrhage: a propensity-adjusted analysis. Acta Neurochir 165, 1841–1846 (2023). https://doi.org/10.1007/s00701-023-05651-1
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DOI: https://doi.org/10.1007/s00701-023-05651-1