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Quantitative evaluation of WEB shape modification: A five-year follow-up study.

Kevin Janot1, Denis Herbreteau1, Aymeric Amelot2

  • 1University Hospital of Tours, Neuroradiology Department, 2, boulevard Tonnellé, 37000 Tours, France.

Journal of Neuroradiology = Journal De Neuroradiologie
|March 12, 2019
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Summary
This summary is machine-generated.

Web shape modification (WSM) occurred in over half of WEB device aneurysm treatments but did not impact occlusion rates. This phenomenon appears early and progresses, suggesting it relates to aneurysm healing.

Keywords:
AneurysmWEB

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Area of Science:

  • Endovascular neurosurgery
  • Cerebral aneurysm treatment
  • Medical device technology

Background:

  • Web shape modification (WSM) is linked to aneurysm recurrence after WEB device implantation.
  • Understanding WSM is crucial for evaluating WEB device efficacy.

Purpose of the Study:

  • To report a five-year experience with the WEB device.
  • To quantitatively assess the phenomenon of web shape modification (WSM).

Main Methods:

  • Prospective enrollment and retrospective analysis of 50 patients with 51 unruptured aneurysms treated with the WEB device (July 2012-July 2017).
  • Independent core lab evaluation of anatomical results and WSM using digital subtraction angiography (DSA) follow-up.
  • Definition of a web shape modification ratio (WSMr) to quantify device deformation over time.

Main Results:

  • WSM was observed in 72.9% of aneurysms during follow-up.
  • Adequate occlusion rates were similar with (87.0%) and without (92.6%) WSM.
  • WSM was evident early (6-month DSA) and showed progressive changes in the WSMr over time.

Conclusions:

  • WEB shape modification is common but does not affect adequate aneurysm occlusion rates.
  • WSM is an early and progressive phenomenon, supporting a link to aneurysm healing rather than external compression.
  • Quantitative WSMr analysis provides insights into WEB device behavior post-implantation.