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Flow-volume loop in left mainstem bronchial obstruction

Flow-volume loop in left mainstem bronchial obstruction
Maximum flow-volume curves of patient before insertion of a stent in a narrowed left main bronchus. Both an end-inspiratory tail and a biphasic spirogram are seen.
VEMAX: forced expiratory flow; VIMAX: forced inspiratory flow.
Graphic 74178 Version 3.0