Title :
A silicon bidirectional flow sensor for measuring respiratory flow
Author :
van Putten, M.J.A.M. ; van Putten, M.H.P.M. ; van Putten, A.F.P. ; Pompe, J.C. ; Bruining, H.A.
Author_Institution :
Dept. of Neurology, Acad. Hospital Leiden, Netherlands
Abstract :
The authors 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 ≤40 ms and fall-time is ≤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.
Keywords :
application specific integrated circuits; biomedical electronics; biomedical measurement; electric sensing devices; flow measurement; pneumodynamics; 40 ms; 60 ms; bidirectional sensitivity; electronic circuitry; fall-time; gas composition changes effect; healthy volunteer; mechanical ventilation; mechanically ventilated patients; rise-time; sensor output signal; solid-state silicon integrated sensor; temperature sensitivity; thermal vector sensor; Fluid flow measurement; Gas detectors; Integrated circuit measurements; Mechanical sensors; Sensor phenomena and characterization; Silicon; Solid state circuits; Temperature sensors; Thermal sensors; Ventilation; Equipment Design; Humans; Pulmonary Ventilation; Respiration, Artificial; Semiconductors; Sensitivity and Specificity; Silicon; Temperature; Thermal Conductivity; Ventilators, Mechanical;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
