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- W2211771557 abstract "The effect of pulmonary resection on the maximal emptying of the remaining lobes was examined in an open-chest preparation in normal canine lungs and in a unilobar papain emphysema model. The objectives were to determine whether, compared with when both lungs were deflated (BL), maximal emptying of the normal lower lobes or the emphysematous right lower lobe would be altered 1) when acute pneumonectomy of the contralateral lung was performed (OL) and 2) when the lower lobe deflated alone (LA). The alveolar capsule technique was used to measure alveolar pressures (Palv) at 75, 50, and 30% lobar vital capacity (VC). During forced deflation, the maximal rates of deflation (dPalv/dt) and flows (lobarV(max)) of the lower lobes were determined under the three different conditions. The Pitot-static tube technique was used to measure intrabronchial pressures and to estimate bronchial area and compliance in which values were obtained at the same central airway during the conditions studied. The results showed that, compared with BL and OL, dPalv/dt and lobar V(max) decreased during LA (P < 0.05). These findings were due to a reduction in bronchial area during LA that limited flow at a lower maximal value compared with BL. This decrease in area appeared to be due to a change in bronchial pressure area behavior that resulted in a smaller bronchial area during LA for similar transmural pressures between conditions. There were no differences in findings between normal and emphysematous lobes. This study suggested that removal of lobes may alter the pressure area behavior of central airways. Possible mechanisms considered were differences in axial tension between conditions, negative effort dependence, or parenchymal-bronchial interdependence that may be relevant to understanding the dynamic collapsibility of central as well as intraparenchymal airways." @default.
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- W2211771557 date "2002-01-01" @default.
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- W2211771557 title "Interdependence of flow between lobes reduces maximal emptying postresection in dogs" @default.
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- W2211771557 doi "https://doi.org/10.1152/jappl.2002.92.1.100" @default.
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