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

Eran Shalom, Salman Noach, Youval Slovik, Meir Nitzan

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


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.

Original languageEnglish
Pages (from-to)631-636
Number of pages6
JournalJournal of Biophotonics
Issue number8
StatePublished - 1 Aug 2013
Externally publishedYes


  • Expiration
  • Inspiration
  • Laser Doppler flowmetry
  • Light absorption
  • Microcirculation
  • Sympathetic nervous system

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • General Biochemistry, Genetics and Molecular Biology
  • General Engineering
  • General Physics and Astronomy


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