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Cerebral Revascularization for Aneurysms in the Flow-Diverter Era
David C Straus1, Harley Brito da Silva1, Lynn McGrath1
1Department of Neurological Surgery, University of Washington-Harborview Medical Center, Seattle, Washington.
Neurosurgery
|April 7, 2017
Summary
Flow-diverting stents (FDS) reduced cerebral bypass use for aneurysms. Bypass is now reserved for complex cases and rescue therapy, with patients presenting with worse functional status post-FDS introduction.
Area of Science:
- Neurosurgery
- Vascular Surgery
- Endovascular Therapy
Background:
- Cerebral bypass is a critical treatment for complex intracranial aneurysms.
- Flow-diverting stents (FDS) have emerged as a significant advancement in endovascular arterial reconstruction.
Purpose of the Study:
- To evaluate the impact of flow-diverting stents (FDS) on the utilization and outcomes of cerebral bypass surgery for intracranial aneurysms.
- To compare patient characteristics and surgical outcomes between the pre- and post-FDS eras.
Main Methods:
- A 10-year review of cerebral bypass surgeries for aneurysms was conducted.
- Patients were divided into pre-FDS (July 2005-June 2010) and post-FDS (July 2010-June 2015) cohorts.
- Clinical data, surgical techniques, and outcomes were compared between the two eras.
Main Results:
- The proportion of cerebral bypass procedures decreased from 8% in the pre-FDS era (85/1061) to 3% in the post-FDS era (45/1348).
- Patients undergoing bypass in the post-FDS era exhibited poorer baseline functional status (mRS 1.18 vs. 0.55).
- This indicates increased patient complexity in the flow-diverter era.
Conclusions:
- The introduction of FDS has led to a reduced but continued role for cerebral bypass in aneurysm treatment.
- Cerebral bypass remains essential for highly selected complex cases and as a salvage option following FDS failure.
- Vascular neurosurgery benefits from the combined application of bypass and endovascular techniques.