Now showing items 1-3 of 3

  • Reduction of motion artifacts using a two-frequency impedance plethysmograph and adaptative filtering 

    Rosell Ferrer, Francisco Javier; Cohen, Kevin P.; Webster, John G. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1995-10-01)
    Article
    Open Access
    We measured transthoracic impedance in nine presumed healthy adult subjects with a two-frequency plethysmograph at 57 kHz and 185 kHz. The measurement protocol included periods of normal breathing without motion and periods ...
  • Signal-to-motion artifact ratio versus frequency for impedance pneumography 

    Rosell Ferrer, Francisco Javier; Webster, John G. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1995-03-01)
    Article
    Open Access
    We measured transthoracic impedance between 12.5 and 185 kHz in nine adults. We used a system with two impedance channels, both simultaneously detecting the real part of impedance at two different frequencies. We used only ...
  • Skin impedance from 1 Hz to 1 MHz 

    Rosell Ferrer, Francisco Javier; Colominas i Balagué, Josep; Riu Costa, Pere Joan; Pallàs Areny, Ramon; Webster, John G. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1988-08-01)
    Article
    Open Access
    We measured the impedance of skin coated with gel, but otherwise unprepared from 1 Hz to 1 MHz at ten sites on the thorax, leg, and forehead of ten subjects. For a 1 cm2 area, the 1 Hz impedance varied from 10 kΩ to 1 MΩ, ...