• IEEE Trans Biomed Eng · Feb 1997

    A silicon bidirectional flow sensor for measuring respiratory flow.

    • M J van Putten, M H van Putten, A F van Putten, J C Pompe, and H A Bruining.
    • Department of Neurology, Academic Hospital Leiden, The Netherlands. putten@rullf2.medfac.leidenuniv.nl
    • IEEE Trans Biomed Eng. 1997 Feb 1; 44 (2): 205-8.

    AbstractWe describe a solid-state, silicon integrated, bidirectional flow sensor for respiratory applications. The sensor is a thermal vector sensor. The electronic circuitry for obtaining bidirectional sensitivity is presented together with actual application to a healthy volunteer put on mechanical ventilation. The sensor's input flow range is from -60 to +60 L/min, and its rise-time is < or = 40 ms and fall-time is < or = 60 ms. The effect of changes in gas composition as used in mechanically ventilated patients on the sensor output signal are estimated to be less than 2%. The temperature sensitivity is about -1.5% per degree Celsius.

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