Apparatus and method for measuring the variability of cardiovasc

Details Apparatus and method for measuring the variability of cardiovasc Apparatus and method for measuring the variability of cardiovasc

1996-11-06

1999-01-26

Yu, Mickey

Surgery

Miscellaneous

Methods

600479, A61B 1900

Patent

active

058628053

ABSTRACT:
Apparatus for measuring the variability of cardiovascular parameters, having a photoplethysmographic (PPG) probe, including a modulated first light source and a photodetector, a demodulator connected to the photodetector for demodulating PPG signals detected by the photodetector, an analog to digital converter for digitizing the demodulated signals, and a processor for repeatedly analysing the PPG signals for a predetermined number of times. A method for measuring the variability of cardovascular parameters.

REFERENCES:
patent: 3980075 (1976-09-01), Heule
patent: 4834107 (1989-05-01), Warner
patent: 5379774 (1995-01-01), Nishimura et al.
patent: 5423322 (1995-06-01), Clarke et al.
patent: 5632272 (1997-05-01), Diab et al.
Ratner et al. "Analysis of the Photoplethysmographic Signal" SPEI (1972):410-15, Dec. 1992.
Nitzan et al. "Faster Procedure for Deriving Regional Blood Flow by the Noninvasive Transient Thermal Clearance Method" Ann Biomed Engineering (21):259-62, May 1993.
Nitzan et al. "A Device for Reliable Recording of the Photoplethysmographic Signal" SPIE (2084): 171-177, Sep. 1993.
Nitzan et al. "Infrared Radiometry of Thermally Insulated Skin for the Assessment of Skin Blood Flow" SPEI 33(9): 2953-7, Sep. 1994.
Nitzan et al. "Spontaneous Low Frequency Fluctuations in Finger Blood Volume, Measured by Photoplethysmography" SPEI (2631): 84-91, Sep. 1995.
Ugnell et al. "The Time-Variable Photoplethysmographic Signal; Dependence of the Heart Synchronous Signal on Wavelength and Sample Volume" Med Eng Phys 17(8): 571-8, Dec. 1995.
Schnall et al. "A Rapid Noninvasive Blood Pressure Measurement Method for Discrete Value and Full Waveform Determination" J Applied Phys. 80(1):307-14, 1996.

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