title: Comparison of respiratory rate estimation based on tracheal sounds versus a capnograph.
abstract: The objective was to compare the accuracy of estimations of respiratory rate (RR), based on tracheal sounds, with simultaneous estimations from a capnograph, using as a common reference a pneumotachometer. Five subjects without pulmonary diseases were enrolled. Tracheal sounds were acquired using a contact piezoelectric sensor placed on the subject's throat and analyzed using a combined investigation of the sound envelope and frequency content. The capnograph and pneumotachometer were coupled to a face mask worn by the subjects. There was a strong linear correlation (r2= 0.98) between the acoustic method and the pneumotachometer and also between the capnograph and the pneumotachometer (r2 = 0.98). The SEE obtained by the acoustic method was 1.11 and the SEE obtained by the capnograph was 1.23. As a conclusion, the accuracy of the respiratory rate estimated from tracheal sounds on adult subjects was comparable to the accuracy of a commercial capnograph, using as a common reference a pneumotachometer.
authors.affiliation: Andromed Inc., Montreal, Quebec, Canada.
authors.forename: G
authors.initials: G
authors.lastname: Sierra
authors.forename: V
authors.initials: V
authors.lastname: Telfort
authors.forename: B
authors.initials: B
authors.lastname: Popov
authors.forename: M
authors.initials: M
authors.lastname: Pelletier
authors.forename: P
authors.initials: P
authors.lastname: Despault
authors.forename: R
authors.initials: R
authors.lastname: Agarwal
authors.forename: V
authors.initials: V
authors.lastname: Lanzo