title: [Effects of surgical microscope-based indocyanine green videoangiography during aneurysm surgery].
abstract: OBJECTIVE
  To evaluate the effects of surgical microscope-based indocyanine green videoangiography (ICGA) in aneurysm surgery and compare the values of ICGA and postoperative digital subtraction angiography (DSA).
  
  
  METHODS
  101 patients with intracranial aneurysm underwent clipping of 113 aneurysms. A microscope-integrated light source containing infrared excitation light illuminated the operating field. The dye ICG was injected intravenously, and the intravascular fluorescence was recorded by a video camera attached to the microscope with optical filtering to block ambient and laser light for collection of only ICG-induced fluorescence. All patients underwent DSA 6-13 days post-operatively. The results of patency of parent, branching, and perforating arteries and documentation of aneurysm obliteration shown by ICGA and DSA were compared.
  
  
  RESULTS
  219 times of ICGA was performed in these 101 patients with excellent image quality and resolution, allowing intra-operative real-time assessment of the cerebral circulation. The ICG angiographic results could be divided into arterial, capillary, and venous phases, comparable to those observed with DSA. In all cases, the postoperative angiographic results corresponded to the intraoperative ICG video angiographic findings. In 3 cases, the information provided by intraoperative ICGA significantly changed the surgical procedure.
  
  
  CONCLUSIONS
  Simple and repeatable, microscope-based ICGA provides real-time information about vessels and aneurysm sac. This technique may be useful during routine aneurysm surgery as an adjunct to intraoperative microvascular Doppler ultrasonography and DSA.
authors.affiliation: Department of Neurosurgery, Tiantan Hospital, Capital Medical University, Beijing 100050, China.
authors.forename: Shuo
authors.initials: S
authors.lastname: Wang
authors.forename: Ling
authors.initials: L
authors.lastname: Liu
authors.forename: Yuan-li
authors.initials: YL
authors.lastname: Zhao
authors.forename: Dong
authors.initials: D
authors.lastname: Zhang
authors.forename: Ming-qi
authors.initials: MQ
authors.lastname: Yang
authors.forename: Ji-zong
authors.initials: JZ
authors.lastname: Zhao
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D015901:Angiography, Digital Subtraction / Q000379:methods; D002533:Cerebral Angiography / Q000379:methods*; D002648:Child; D005260:Female; D006801:Humans; D007208:Indocyanine Green; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging* / Q000601:surgery; D008297:Male; D008853:Microscopy; D008875:Middle Aged; D016343:Monitoring, Intraoperative / Q000379:methods*; D055815:Young Adult
chemical_list: D007208:Indocyanine Green