title: Intraoperative Matas test using microscope-integrated intraoperative indocyanine green videoangiography with temporary unilateral occlusion of the A1 segment of the anterior cerebral artery.
abstract: OBJECTIVE
  The aim of the present study was to assess a new technique of surgical microscope-based indocyanine green (ICG) videoangiography (VAG) to confirm the patency of the anterior communicating artery (AcomA) after clipping AcomA aneurysms.
  
  
  METHODS
  Aneurysmal clipping of five cases of unruptured, broad-neck AcomA aneurysm was performed using the Carl Zeiss Surgical Microscope OPMI Pentero INFRARED 800.
  
  
  RESULTS
  In all five patients, after clipping AcomA aneurysms, the patency of AcomA was confirmed using ICGVAG findings and temporary unilateral occlusion of the A1 segment of the anterior cerebral artery using temporary clips. Images were excellent and enabled a real-time surgical assessment because the structures of interest, including vessels, perforating arteries, or residual aneurysm neck, were visible to the surgeon's eye under the microscope in all five patients.
  
  
  CONCLUSIONS
  ICGVAG and temporary unilateral occlusion with clips provides a simple, reliable, real-time, and rapid intraoperative assessment of the patency of AcomA. This technique may help to improve the quality of neurosurgical procedures.
authors.affiliation: Department of Neurosurgery, Nippon Medical School, Tokyo, Japan. ymurai@nms.ac.jp
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Murai
authors.forename: Koji
authors.initials: K
authors.lastname: Adachi
authors.forename: Ryo
authors.initials: R
authors.lastname: Takagi
authors.forename: Kenta
authors.initials: K
authors.lastname: Koketsu
authors.forename: Fumihiro
authors.initials: F
authors.lastname: Matano
authors.forename: Akira
authors.initials: A
authors.lastname: Teramoto
mesh_terms: D000368:Aged; D002533:Cerebral Angiography / Q000379:methods*; D004396:Coloring Agents; D005260:Female; D006801:Humans; D007208:Indocyanine Green; D002532:Intracranial Aneurysm / Q000601:surgery*; D018715:Microscopy, Video / Q000379:methods*; D016343:Monitoring, Intraoperative / Q000379:methods*; D014656:Vascular Surgical Procedures / Q000295:instrumentation / Q000379:methods*
chemical_list: D004396:Coloring Agents; D007208:Indocyanine Green