The Roentgen Appearance of Lobar and Segmental Collapse of the Lung

Robbins, Laurence L.; Hale, Clayton H.; Merrill, O. E.

doi:10.1148/44.5.470

Cited by 9 publications

(2 citation statements)

References 3 publications

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“…These lines are undoubtedly shadows of planar atelectasis. Fraser and Pare (13, pp 196-239) following Robbins and Hale (14) and Lubert and Krause (15,16) have presented detailed patterns of lobar and total pulmonary collapse. They have shown that when atelectasis is approached a collapsed lobe or segment tends to look like a curved plate whose edges tend not to retract from the chest wall and the mediastinum.…”

Section: Jiscussionmentioning

confidence: 99%

Stress, deformation, and atelectasis of the lung.

Fung¹

1975

Circulation Research

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The lung parenchyma as a tissue has a rather unusual stress-strain relationship. A theoretical derivation of this relationship is presented which connects the surface tension and the tissue elastic stress in the alveolar septa with the alveolar geometry. The mathematical expression contains a few meaningful physical constants which can be determined by in vitro and in vivo experiments. With this stress-strain relationship, the general equations of lung mechanics are formulated, and solutions to some simpler problems are presented. First, the equilibrium of a lung subjected to a uniform inflation pressure (definition: alveolar air pressure - intrapleural pressure - pleural tension X mean curvature of pleura) is analyzed, and the stability of the equilibrium states with respect to small perturbations is examined. Second, an exact solution for a lung in a chest under the influence of gravity is presented; the solution is "exact," of course, for only a particular lung, but it can serve as a standard to check numerical procedures being developed in many laboratories. Finally, three types of possible atelectasis-planar, axial, and focal-are analyzed. The planar type can exist in a normally inflated lung, provided the layers of alveoli are forced to collapse toward a plane by some external agent. But axial atelectasis (alveoli collapse into a cylinder) can occur only if the dimension (at which the elastic tension in the alveolar septa vanishes). Similarly, focal atelectasis can occur only if the entire lung is smaller than the resting volume.

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Section: Jiscussionmentioning

confidence: 99%

Stress, deformation, and atelectasis of the lung.

Fung¹

1975

Circulation Research

View full text Add to dashboard Cite

show abstract

“…Though knowledge of the silhouette sign dates back to the 1930s, the first written reference was made by Robbins and Hale (5,6) in 1945. They noted that diseased lung in the immediate proximity of the border of the heart will obscure that border.…”

Section: Resultsmentioning

confidence: 99%