Flow Diversion at Maturity: Further, Safer, Smarter

Area of Science:

• Endovascular neurosurgery
• Medical device technology
• Vascular surgery

Background:

• Flow diversion has demonstrated efficacy in treating intracranial aneurysms over two decades.
• The field is advancing, necessitating a shift from broad application to precise, consistent arterial reconstruction.

Purpose of the Study:

• To evaluate the current state of flow diversion technology for intracranial aneurysms.
• To identify priorities for advancing clinical maturity and optimizing treatment delivery.

Main Methods:

• Review of existing evidence and clinical experience with flow diversion devices.
• Analysis of advancements in device technology, antiplatelet strategies, and classification systems.
• Discussion of future research directions and implementation strategies.

Main Results:

• Flow diversion has achieved biological maturity, with new feasibility in distal and small-vessel applications.
• Surface-modified devices and evidence-based antiplatelet regimens (e.g., COATING trial) reduce thrombogenicity.
• Standardized frameworks (e.g., F2B2 classification) aid in differentiating device adaptation from instability.

Conclusions:

• Flow diversion requires enhanced clinical maturity for predictable, accessible, and durable outcomes.
• Key priorities include standardized imaging, predictive patient selection, validated biological endpoints, reproducible techniques, and economic considerations.
• The next decade should focus on improving the quality and reliability of flow diversion treatments.