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Related Experiment Video

Updated: Apr 18, 2026

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The wire anchor loop traction (WALT) maneuver.

Khaled Effendi1, Raphael Hillel Sacho1, François Belzile2

  • 1Diagnostic and Therapeutic Neuroradiology, St Michael's Hospital, Toronto, Canada.

Journal of Neurointerventional Surgery
|January 31, 2015
PubMed
Summary

A new technique simplifies crossing complex intracranial aneurysms by straightening microcatheter loops. This method avoids the need for distal support devices during stent deployment, improving aneurysm treatment.

Keywords:
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Area of Science:

  • Neurosurgery
  • Interventional Neuroradiology
  • Vascular Surgery

Background:

  • Treating large complex intracranial aneurysms often requires stent-assisted coiling or other endovascular techniques.
  • Navigating microcatheters and microwires across the aneurysm neck into distal vessels can be challenging due to loop formation.

Observation:

  • A novel technique is presented to manage the loop formed by microcatheters and microwires within intracranial aneurysms.
  • This method involves specific maneuvers during microcatheter and microwire withdrawal to straighten the loop.

Findings:

  • The described technique effectively straightens the microcatheter-microwire loop within the aneurysm.
  • This maneuver facilitates crossing the aneurysm neck into the distal vasculature without requiring distal purchase devices.

Implications:

  • This approach may simplify endovascular treatment of complex intracranial aneurysms.
  • It potentially reduces the need for adjunct devices like stents, balloons, or coils solely for distal purchase.
  • This technique could enhance procedural safety and efficiency in neurovascular interventions.