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J Appl Physiol 38: 395-401, 1975;
8750-7587/75 $5.00
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Journal of Applied Physiology, Vol 38, Issue 3 395-401, Copyright © 1975 by American Physiological Society

ARTICLES

Lung volume and interdependence in the pig

J. T. Sylvester, H. A. Menkes and F. Stitik

The effect of lung volume on the mechanical interdependence between an obstructed sublobar region of lung and its surrounding tissues was investigated in intact and isolated pig lungs. Interdependence is arbitrarily defined as the effectiveness with which the linkage between the region and surrounding tissue mediates a tendency for inflation to become even whenever it is uneven. We found that when the volume of the surrounding lung (Vl) was high relative to the volume of the obstructed region (Vr), or when they were relatively equal at higher inflation states, interdependence decreased. When Vr was high relative changes in regional shape observed during even and uneven inflation states, we suggest that regional distortion and its effects on regional elastic recoil are important determinants of pulmonary interdependence.




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