title: [Intraoperative microvascular Doppler ultrasonography monitoring in intracranial aneurysm surgery].
abstract: OBJECTIVE
  To evaluate the reliability of intraoperative microvascular Doppler ultrasonography (MDU) in cerebral aneurysm surgery.
  
  
  METHODS
  MDU was conducted among 46 patients with 51 cerebral aneurysms undergoing 47 operations to examine the blood flow velocity in the aneurysmal sac and in the adjacent vessels before and after aneurysm clipping.
  
  
  RESULTS
  MDU verified 6 cases of stenosis or occlusion of an adjacent vessel induced by clip positioning that had escaped detection by visual inspection (12.76%, 6/47). In addition, MDU demonstrated that one out of the 51 aneurysms failed to be occluded (1.96%). The incidence of stenosis, occlusion of adjacent vessel, and aneurysm failing to be occluded was closely correlated with the size of aneurysm, and such conditions were prone to occur in anterior communicating artery (ACoA) and internal carotid artery (ICA) aneurysms.
  
  
  CONCLUSIONS
  MDU should be used routinely in cerebral aneurysm surgery, especially in cases of giant aneurysms and aneurysms without obvious neck. In cases of ACoA and ICA aneurysms, MDU is more useful.
authors.affiliation: Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Tong
authors.forename: Shuo
authors.initials: S
authors.lastname: Wang
authors.forename: Yuan-li
authors.initials: YL
authors.lastname: Zhao
authors.forename: Ji-zong
authors.initials: JZ
authors.lastname: Zhao
mesh_terms: D000328:Adult; D000368:Aged; D001783:Blood Flow Velocity; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D016343:Monitoring, Intraoperative / Q000379:methods*; D018608:Ultrasonography, Doppler