Summary:
a) Schematic representation of graphic integration of flow (V′), volume (V), and shift volume (ΔV) parameters, adapted from Matthys and Orth [23], showing flow-resistive work of breathing during inspiration and expiration (AI and AE, respectively) and flow–volume loop during tidal breathing (BI and BE), used in the calculation of effective specific resistance (sReff). See text for discussion. b) Same tracing of specific resistance (sRaw) loop as in figure 5, but showing the slope resulting from calculation of area ratio shown in figure 6a, equal to sReff positioned on the sRaw loop by regression technique (sReff = 2.7 kPa·s). VT: tidal volume; V′E: expiratory flow; V′I: inspiratory flow; FRCpleth: plethysmographic functional residual capacity. See text for discussion.
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Figure
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Normal
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F10
Highwire: Type:
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