Assessment of respiratory effort by means of strain gauges and esophageal pressure swings: a comparative study.


We characterized apneas by a quantitative method (esophageal pressure measurements) and by a qualitative method (strain gauges) at the same time in 22 patients with sleep-related breathing disorders. Detection of respiratory effort by strain gauges significantly overestimated the total number of central apneas in each patient. Despite this overestimation… (More)


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