Intraoperative Angiographic Assessment of Graft Patency During Extracranial-Intracranial Bypass Procedures

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  • YANAKA Kiyoyuki
    Department of Neurosurgery, Institute of Clinical Medicine, University of Tsukuba
  • FUJITA Keishi
    Department of Neurosurgery, Institute of Clinical Medicine, University of Tsukuba
  • NOGUCHI Shozo
    Department of Neurosurgery, Institute of Clinical Medicine, University of Tsukuba
  • MATSUMARU Yuji
    Department of Neurosurgery, Institute of Clinical Medicine, University of Tsukuba
  • ASAKAWA Hiroyuki
    Department of Neurosurgery, Institute of Clinical Medicine, University of Tsukuba
  • ANNO Izumi
    Department of Radiology, Institute of Clinical Medicine, University of Tsukuba
  • MEGURO Kotoo
    Department of Neurosurgery, Institute of Clinical Medicine, University of Tsukuba
  • NOSE Tadao
    Department of Neurosurgery, Institute of Clinical Medicine, University of Tsukuba

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説明

The use of intraoperative angiography to monitor graft patency was retrospectively reviewed in extracranial-intracranial bypass procedures. Forty-two patients underwent 43 extracranial-intracranial bypass procedures with the use of intraoperative angiography. Superficial temporal artery (STA)-middle cerebral artery (MCA) bypass was performed in 41 patients (42 procedures) with ischemic cerebrovascular diseases, and vertebral artery-MCA bypass using radial artery graft for intentional ligation of the common carotid artery in one patient with nasopharyngeal carcinoma. Intraoperative angiography provided high-quality subtraction images in every case. There were no complications due to angiography. Graft occlusion was observed intraoperatively in three cases, but an additional procedure reopened the occluded graft in all three cases. Graft patency rate was 100% after surgery. Outcome was excellent in 40 patients and good in one patient who underwent STA-MCA bypass. Intraoperative angiography provides useful information regarding graft patency during bypass surgery. Intraoperative assessment prior to wound closure allows for the recognition and correction of technical failure and decreases the risk of postoperative complications.<br>

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