Cerebral Hemodynamic Change and Metabolic Alteration in Severe Hemorrhagic Shock

Conference paper
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 812)

Abstract

Understanding the biological mechanism and identifying biomarkers of hemorrhagic shock is important for diagnosis and treatment. We aim to use optical imaging to study how the cerebral blood circulation and metabolism change during the progression of severe hemorrhagic shock, especially the decompensatory stage. We used a multi-parameter (blood pressure (BP), cerebral blood flow (CBF), functional vascular density (FVD), blood oxygenation and mitochondrial NADH signal) cerebral cortex optical imaging system to observe brain hemodynamic change and metabolic alteration of rats in vivo for 4 h. Cerebral circulation and mitochondrial metabolism could be well preserved in the compensatory stage but impaired during the decompensatory stage. The changes of brain hemodynamics and metabolism may provide sensitive indicators for various shock stages including the transition from compensatory stage to decompensatory stage. Our novel imaging observations of hemodynamic and metabolic signals in vivo indicated that the rat brains under hemorrhagic shock suffered irreversible damage which could not be compensated by the autoregulation mechanism, probably due to injured mitochondria.

Keywords

Brain Cerebral circulation Mitochondrial metabolism Decompensatory stage NADH 

Notes

Acknowledgments

This work was supported by the National Major Scientific Research Program of China (Grant No. 2011CB910401) and the Science Fund for Creative Research Group of China (Grant No. 61121004) and the Director Fund of Wuhan National Laboratory for Optoelectronics and the Specific International Scientific Cooperation (Grant No. 2010DFR30820).

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Copyright information

© Springer Science+Business Media, LLC 2014

Authors and Affiliations

  • Nannan Sun
    • 1
    • 2
    • 3
    • 4
  • Lin Z. Li
    • 3
    • 4
  • Weihua Luo
    • 1
    • 2
  • Qingming Luo
    • 1
    • 2
  1. 1.Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhanP. R. China
  2. 2.Key Laboratory of Biomedical Photonics of Ministry of Education, Department of Biomedical EngineeringHuazhong University of Science and TechnologyWuhanP. R. China
  3. 3.Molecular Imaging Laboratory, Department of Radiology, Perelman School of MedicineUniversity of PennsylvaniaPhiladelphiaUSA
  4. 4.Britton Chance Laboratory of Redox Imaging, Johnson Research Foundation, Department of Biochemistry and Biophysics, Perelman School of MedicineUniversity of PennsylvaniaPhiladelphiaUSA

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