1. Expanded version of the early part of a subject's volume–time spirogram, illustrating back-extrapolation through the steepest part of the curve, where flow is peak expiratory flow (PEF), to determine the new time zero.
Expanded version of the early part of a subject's volume–time spirogram, illustrating back-extrapolation through the steepest part of the curve, where flow is peak expiratory flow (PEF), to determine the new time zero. Forced vital capacity (FVC): L; back extrapolated volume (EV): L (2.9% FVC) : back extrapolation line through PEF. Reproduced from [1] with permission from the publisher.
V.C. Moore breathe 2012;8:
©2012 by European Respiratory Society