title: Delayed retraction of the pipeline embolization device and corking failure: pitfalls of pipeline embolization device placement in the setting of a ruptured aneurysm.
abstract: BACKGROUND
  The safety of flow-diverting stents for the treatment of ruptured intracranial aneurysms is unknown.
  
  
  METHODS
  A 35-year-old woman with a ruptured dissecting aneurysm of the intradural right vertebral artery and incorporating the right posterior inferior cerebellar artery was treated with a Pipeline Embolization Device (PED). Five days after reconstruction of the diseased right vertebral segment, she was treated for vasospasm, and retraction of the PED was observed, leaving her dissecting aneurysm unprotected. A second PED was placed with coverage of the aneurysm, but vasospasm complicated optimal positioning of the device.
  
  
  CONCLUSIONS
  In addition to the potential risks of dual antiplatelet therapy in these patients, this case illustrates 2 pitfalls of flow-diverting devices in vessels in vasospasm: delayed retraction of the device and difficulty positioning the device for deployment in the setting of vasospasm.
authors.affiliation: Department of Radiology, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, CA 94305-5105, USA. mctaggartr@gmail.com
authors.forename: Ryan A
authors.initials: RA
authors.lastname: McTaggart
authors.forename: Justin G
authors.initials: JG
authors.lastname: Santarelli
authors.forename: Mary L
authors.initials: ML
authors.lastname: Marcellus
authors.forename: Gary K
authors.initials: GK
authors.lastname: Steinberg
authors.forename: Robert L
authors.initials: RL
authors.lastname: Dodd
authors.forename: Huy M
authors.initials: HM
authors.lastname: Do
authors.forename: Michael P
authors.initials: MP
authors.lastname: Marks
mesh_terms: D000328:Adult; D017542:Aneurysm, Ruptured / Q000000981:diagnostic imaging / Q000601:surgery*; D002533:Cerebral Angiography; D004621:Embolization, Therapeutic / Q000009:adverse effects* / Q000295:instrumentation*; D005260:Female; D006801:Humans; D012422:Rupture, Spontaneous; D020301:Vasospasm, Intracranial / Q000000981:diagnostic imaging / Q000209:etiology*; D020217:Vertebral Artery Dissection / Q000000981:diagnostic imaging / Q000601:surgery*