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Dislodging of valves. (a) A valve dislodged shortly after insertion and situated near the main carina; (b) a coughing up valve in a 42-year-old patient; (c) two well-placed valves in the right lower lobe bronchi in a 72-year-old patient; and (d) a displaced valve with mucous impact on the valve inserted in the apical segment of the left lower lobe bronchus.
