title: A silicon bidirectional flow sensor for measuring respiratory flow.
abstract: We 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.
authors.affiliation: Department of Neurology, Academic Hospital Leiden, The Netherlands. putten@rullf2.medfac.leidenuniv.nl
authors.forename: M J
authors.initials: MJ
authors.lastname: van Putten
authors.forename: M H
authors.initials: MH
authors.lastname: van Putten
authors.forename: A F
authors.initials: AF
authors.lastname: van Putten
authors.forename: J C
authors.initials: JC
authors.lastname: Pompe
authors.forename: H A
authors.initials: HA
authors.lastname: Bruining
mesh_terms: D004867:Equipment Design / Q000706:statistics & numerical data; D006801:Humans; D012123:Pulmonary Ventilation; D012121:Respiration, Artificial / Q000295:instrumentation / Q000379:methods / Q000706:statistics & numerical data; D012666:Semiconductors / Q000706:statistics & numerical data; D012680:Sensitivity and Specificity; D012825:Silicon; D013696:Temperature; D013814:Thermal Conductivity; D012122:Ventilators, Mechanical / Q000706:statistics & numerical data
chemical_list: D012825:Silicon