title: Changes in the intraaneurysmal pressure due to HydroCoil embolization.
abstract: OBJECTIVE
  The purpose of this study was to measure the changes in the intraaneurysmal fluid pressure and parent vessel flow characteristics resulting from packing the aneurysmal sac with hydrogel-coated coils.
  
  
  METHODS
  Platinum coils coated with an expansible hydrogel were used to embolize a silicone model of the basilar tip aneurysm. The intraaneurysmal fluid pressure was measured with a NeuroCare Camino Pressure Micro-Probe at various packing ratios. A programmable pulsatile pump was used to input a physiologically relevant pulsatile flow in the parent artery.
  
  
  RESULTS
  The intraaneurysmal fluid pressure did not increase when packing the aneurysm with hydrogel-coated platinum coils, even with a coil density up to 93%.
  
  
  CONCLUSIONS
  Packing the aneurysm with hydrogel-coated coils at a density up to 93% did not increase the intraaneurysmal fluid pressure.
authors.affiliation: Department of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, CA 92093-0411, USA.
authors.forename: Gádor
authors.initials: G
authors.lastname: Cantón
authors.forename: David I
authors.initials: DI
authors.lastname: Levy
authors.forename: Juan C
authors.initials: JC
authors.lastname: Lasheras
mesh_terms: D001794:Blood Pressure; D004621:Embolization, Therapeutic / Q000009:adverse effects / Q000295:instrumentation; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D002532:Intracranial Aneurysm / Q000503:physiopathology*
chemical_list: D020136:Hydrogel, Polyethylene Glycol Dimethacrylate