| 摘要 |
An expiratory flow sensor system is disclosed herein. The expiratory flow sensor includes an expiratory channel adapted to transfer an expiratory gas, a fresh gas channel adapted to transfer a fresh gas, and a sensing element disposed within the fresh gas channel so that the sensing element is never directly exposed to the expiratory gas. The sensing element is configured to measure a fresh gas flow rate. The fresh gas flow rate may be implemented to estimate an expiratory flow rate in a manner that minimizes imprecision attributable to sensing element contamination.
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