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The Rise and Dwell Time for Peak Expiratory Flow in Patients with and without Airflow Limitation
1998
American Journal of Respiratory and Critical Care Medicine
The response of peak expiratory flow (PEF) meters may be affected by the magnitude of PEF, the time taken to get to PEF, and the duration that the peak is sustained. We undertook a retrospective study to define the 10 to 90% rise time (RT) and dwell time for flow above 90% (DT90) and 95% (DT95) of PEF. Blows were analyzed that had been recorded using a pneumotachograph from 912 patients older than 17 yr of age (556 men) who routinely attended a lung function laboratory. For each subject, that
doi:10.1164/ajrccm.158.1.9708128
pmid:9655702
fatcat:zyxsakyjgbhonpnvfnauzky6oa