• Hiroshi Yokota, Taiji Yonezawa, Tomonori Yamada, Seisuke Miyamae, Taekyun Kim, Yoshiaki Takamura, Katsuya Masui, and Shuta Aketa.
• Department of Neurosurgery, Osaka Police Hospital, Osaka, Japan; Department of Neurosurgery, Nara Medical University, Kashihara, Nara, Japan. Electronic address: hyokota0001@gmail.com.
• World Neurosurg. 2017 Oct 1; 106: 446-449.

BackgroundNeurosurgical application of indocyanine green (ICG) videography before performing a dural opening, known as transdural ICG videography, has been used during surgery of meningiomas associated with venous sinuses as well as cranial and spinal arteriovenous malformations. However, its use for a superficial temporal artery (STA)-to-middle cerebral artery (MCA) bypass has not been reported.MethodsWe performed a retrospective analysis of medical records of patients who underwent transdural ICG videography during STA-MCA bypass performed between January 2012 and March 2015. The primary outcome was visualization of recipient cortical arteries; secondary outcomes were surgical modifications and complications as well as any adverse events associated with transdural ICG videography.ResultsWe analyzed 29 STA-MCA bypass procedures performed in 30 hemispheres with atherosclerotic steno-occlusive disease and found that the proper recipient was identified in 28 hemispheres. Subsequently modified procedures for those were a tailored dural incision and craniotomy correction. No complications associated with ICG administration were encountered; during the postoperative course, transient aphasia was noted in 1 case, chronic subdural hematoma was noted in 1 case, and subdural effusion was noted in 2 cases.ConclusionsTransdural ICG videography for atherosclerotic steno-occlusive disease facilitates modifications during STA-MCA bypass procedures. Recognition of the proper recipient cortical arteries before a dural incision allows the neurosurgeon to perform a tailored dural incision and extension of the bone window, although the contribution to surgical outcome has yet to be determined.Copyright © 2017 Elsevier Inc. All rights reserved.

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