title: Respiratory-induced vasoconstriction measured by light transmission and by laser Doppler signal.
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
authors.affiliation: Department of Applied Physics/Medical Engineering, Jerusalem College of Technology, 21, Havaad Haleumi Street, POB 16031, Jerusalem 91160, Israel.
authors.forename: Eran
authors.initials: E
authors.lastname: Shalom
authors.forename: Salman
authors.initials: S
authors.lastname: Noach
authors.forename: Youval
authors.initials: Y
authors.lastname: Slovik
authors.forename: Meir
authors.initials: M
authors.lastname: Nitzan
mesh_terms: D000328:Adult; D000368:Aged; D001810:Blood Volume / Q000502:physiology; D045853:Exhalation / Q000502:physiology*; D006801:Humans; D001239:Inhalation / Q000502:physiology*; D017078:Laser-Doppler Flowmetry; D008027:Light; D008297:Male; D008875:Middle Aged; D014661:Vasoconstriction; D055815:Young Adult