A flow-diverting stent is not a pressure-diverting stent

AJNR Am J Neuroradiol. 2013 Jan;34(1):E1-4. doi: 10.3174/ajnr.A2613. Epub 2011 Aug 18.

Abstract

The approach for treatment of large and fusiform intracranial aneurysms has evolved from stent-assisted coiling to treatment with flow-diverting stents. The treatment results for these stents are promising; however, early postprocedural aneurysm rupture has been described. The exact cause of rupture is unknown but might be related to intra-aneurysmal flow and pressure changes. We measured intra-aneurysmal pressure before, during, and after placement of a flow-diverting stent by using a dual-sensor guidewire. The pressure inside the aneurysm momentarily decreased during placement but was restored to baseline values within minutes. The flow-diverting stent does not seem to protect the aneurysm from the stress induced by pressure or pressure changes within the lumen.

Publication types

  • Case Reports

MeSH terms

  • Arterial Pressure*
  • Humans
  • Intracranial Aneurysm / complications
  • Intracranial Aneurysm / physiopathology*
  • Intracranial Aneurysm / surgery*
  • Intracranial Thrombosis / etiology
  • Intracranial Thrombosis / prevention & control*
  • Male
  • Mechanical Thrombolysis / methods*
  • Middle Aged
  • Treatment Outcome