Abstract
Background
Chronic subdural hematoma (CSDH) often requires surgical evacuation, but recurrence rates remain high. Middle meningeal artery (MMA) embolization (MMAE) has been proposed as an alternative or adjunct treatment. There is concern that prior surgery might limit patency, access, penetration, and efficacy of MMAE, such that some recent trials excluded patients with prior craniotomy. However, the impact of prior open surgery on MMA patency has not been studied.
Methods
A retrospective analysis was conducted on patients who underwent MMAE for cSDH (2019–2022), after prior surgical evacuation or not. MMA patency was assessed using a six-point grading scale.
Results
Of the 109 MMAEs (84 patients, median age 72 years, 20.2% females), 58.7% were upfront MMAEs, while 41.3% were after prior surgery (20 craniotomies, 25 burr holes). Median hematoma thickness was 14 mm and midline shift 3 mm. Hematoma thickness reduction, surgical rescue, and functional outcome did not differ between MMAE subgroups and were not affected by MMA patency or total area of craniotomy or burr-holes. MMA patency was reduced in the craniotomy group only, specifically in the distal portion of the anterior division (p = 0.005), and correlated with craniotomy area (p < 0.001).
Conclusion
MMA remains relatively patent after burr-hole evacuation of cSDH, while craniotomy typically only affects the frontal-distal division. However, MMA patency, evacuation method, and total area do not affect outcomes. These findings support the use of MMAE regardless of prior surgery and may influence future trial inclusion/exclusion criteria. Further studies are needed to optimize the timing and techniques for MMAE in cSDH management.
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Data availability
Deidentified data will be available from the corresponding author upon reasonable request.
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All authors made substantial contributions. Study conception/design: GSS and BTJ. Data acquisition: GSS, OS, MMD, MMS, SA, SK. Data analysis: GSS. Data interpretation: all authors. Manuscript drafting: GSS. Illustration: SK. Manuscript critical revision for important intellectual content: all authors. Approval of final version of manuscript: all authors. Guarantor of the study: BTJ.
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Sioutas, G.S., Shekhtman, O., Dagli, M.M. et al. Middle meningeal artery patency after surgical evacuation for chronic subdural hematoma. Neurosurg Rev 47, 145 (2024). https://doi.org/10.1007/s10143-024-02383-3
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DOI: https://doi.org/10.1007/s10143-024-02383-3