6533b859fe1ef96bd12b7995
RESEARCH PRODUCT
Simultaneous recording of skin blood pulsations at different vascular depths by multiwavelength photoplethysmography.
Renars ErtsJānis SpigulisAlexey LihachevLasma Gailitesubject
Materials scienceHeartbeatbusiness.industryMaterials Science (miscellaneous)Spectral bandsCw laserIndustrial and Manufacturing EngineeringMicrocirculationWavelengthOpticsHeart RateTemporal resolutionPhotoplethysmogramPulsatile FlowSkin Physiological PhenomenaSkin surfaceHumanssense organsBusiness and International ManagementbusinessPhotoplethysmographyAlgorithmsBlood Flow VelocitySkindescription
A new technique for parallel recording of reflection photoplethysmography (PPG) signals in a broad spectral band (violet to near-infrared) has been developed, and its potential for assessment of blood microcirculation at various depths from the skin surface is discussed. PPG signals have been simultaneously detected at cw laser wavelength sets comprising 405, 532, 645, 807, and 1064 nm. Various signal baseline responses to breath holding and different shapes of the PPG pulses originated from the same heartbeat but recorded at different wavelengths have been observed, indicating a depth variety of the skin blood pulsation dynamics.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-03-16 | Applied optics |