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Cerebral glucose metabolism changes in chronic ischemia patients following subcranial-intracranial bypass

  • Zaitao Yu
  • Xiangen Shi
  • Zhongqing Zhou
  • Yang Yang
  • Pengbo Li
  • Yuqi ZhangEmail author
Original Article
  • 12 Downloads

Abstract

The use of the internal maxillary artery (IMA) in intracranial artery bypass or subcranial-intracranial (SC-IC) bypass has recently been described as an alternative to traditional bypass. This study explores cerebral glucose metabolism characteristics of SC-IC bypass. Ten crescendo transient ischemic attack (TIA) patients with chronic occlusion of the middle cerebral artery (MCA) received bypass surgery of IMA with the radial artery graft (RAG) to the branch of MCA. The graft’s flow volume (FV) was measured by operative intraoperative duplex ultrasonography. Positron emission tomography (PET)/computed tomography (CT) was used to calculate the preoperational and postoperational average of the standard uptake value (SUVavg) of the 18-fluoro-2-deoxy-d-glucose (18F-FDG) in the region of interest (ROI). The asymmetric index (AI) is recommended to reflect the SUVavg changes, and subsequently, cerebral glucose metabolism changes are supposedly clarified. Patent IMA-RAG-MCA bypass in ten chronic ischemia patients was confirmed by angiography after surgery. The intraoperative FV measurement value was 65.64 ± 10.52 (58.11–73.17) ml/min. Before the operation, the SUVavg of the ROI in the ischemic hemisphere (4.76 ± 2.35 (3.08–6.04)) clearly decreased compared to the one (5.99 ± 2.63 (4.11–7.87)) in the contralateral mirror region (P = 0.003). The result of AI of preoperation minus AI of postoperation was more than 10% (P = 0.031), which indicated suspicious significant changes in cerebral metabolism. All symptoms of study patients having crescendo ischemia were resolved in 1 month after the operation. In the cerebral hypoperfusion territory, uptake of 18F-FDG deceased. Improving the flow volume via SC-IC bypass makes available an elevated uptake of 18F-FDG.

Keywords

Ischemic cerebrovascular diseases Subcranial-intracranial bypass Cerebral glucose metabolism 18F-FDG PET/CT 

Notes

Funding

This study was funded by the China Postdoctoral Science Foundation (Grant number 2018M641390).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee-YuQuan Hospital Tsinghua University (reference number 20181664) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Neurosurgery, Yu Quan HospitalTsinghua UniversityBeijingChina
  2. 2.Department of Neurosurgery, Sanbo Brain HospitalCapital Medical UniversityBeijingChina

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