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Respiratory-induced vasoconstriction measured by light transmission and by laser Doppler signal

  1. Eran Shalom1,
  2. Salman Noach1,
  3. Youval Slovik2,
  4. Meir Nitzan1,*

Article first published online: 14 SEP 2012

DOI: 10.1002/jbio.201200097

Additional Information

How to Cite

Shalom, E., Noach, S., Slovik, Y. and Nitzan, M. (2012), Respiratory-induced vasoconstriction measured by light transmission and by laser Doppler signal. J. Biophoton.. doi: 10.1002/jbio.201200097

Author Information

  1. 1

    Department of Applied Physics/Medical Engineering, Jerusalem College of Technology, 21, Havaad Haleumi Street, POB 16031, Jerusalem 91160, Israel

  2. 2

    Department of Otorhinolaringology, H&N Surgery, Soroka University Medical Center, Beer Sheva, Israel

*Phone: 972-2-675 1139, Fax: 972-2-675 1045

Publication History

  1. Article first published online: 14 SEP 2012
  2. Manuscript Accepted: 13 AUG 2012
  3. Manuscript Revised: 8 AUG 2012
  4. Manuscript Received: 24 MAY 2012

Funded by

  • E. W. Joseph Fund, UK

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Keywords:

  • inspiration;
  • expiration;
  • light absorption;
  • sympathetic nervous system;
  • microcirculation;
  • laser Doppler flowmetry

Abstract

Changes in finger tissue blood volume (TBV) measured by light transmission and in laser Doppler flow (LDF) were obtained during long breathing (of 12 s period) and associated with the respiratory phases, inspiration and expiration. For fifteen out of sixteen subjects TBV and LDF started to decrease 0–2 s after the start of expiration and increased during inspiration but the start of increase occurred before the start of inspiration, showing that the respiratory-induced changes in TBV and LDF are mainly associated with the expiration. Decrease of TBV and LDF after expiration was also found during the inspiratory gasps (© 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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