Evaluation of focal brain blood flow with acceleration plethymogram using fractinated impedance method

2007 Fiscal Year Final Research Report Summary

• Project/Area Number: 18591585
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Cerebral neurosurgery
• Research Institution: Hamamatsu University School of Medicine
• Principal Investigator: OKADA Mitsuo Hamamatsu University School of Medicine, Department of neurosurgery, Lecturer (20334972)
• Co-Investigator(Kenkyū-buntansha): TAKEMAE Tadashi Shizuoka university, Department oif technology, Chair (20115356) ; NISHIZAWA Shigeru University of Occupational and Environmental Health, Department of Neurosurgery, Chair (40135257)
• Project Period (FY): 2006 – 2007
• Keywords: magnetism / impedance / cerebral bloodflow / non-Invasive / focal

Research Abstract

Objective: A non-invasive method to evaluate cerebral blood flow is crucial in the study of brain ischemia disorders. In the present study, we developed an acceleration plethymogram using fractionated impedance method for evaluating focal cerebral blood flow. Methods: Acceleration plethymogram was used in this study. Tr-a time on an electro cardiogram was used for analyzing changes of head surface-impedance. Three conditions, rest, smoking and hyper ventilation, were analysed:
Results: Acceleration plethymogram using fractinated impedance method reflected each condition, rest, smoking and hyper ventilation clearly. Furthermore, acceleration plethymogram using fractinated impedance method could evaluate changes of blood flow at focal region non-invasively.
Conclusion: Acceleration plethymogram using fractinated impedance method is safe (less invasive), easy and can reliably make ischemic changes in cerebral blood flow.