"peak expiratory flow meter"

Does peak expiratory flow measured sitting differ from that measured standing? A cross-over study in primary care in Barbados.

BACKGROUND: Several authorities recommend measuring peak expiratory flow (PEF) standing. Limited evidence suggests that PEF obtained …

O. Peter Adams, Khatija As Mangera, Ian R. Hambleton, Euclid H. Morris, Joanne L. Paul-Charles