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A Model of the Gas Trapping Mechanism in Excised Lungs.

Authors
Frazer-DG; Khoshnood-B
Source
Proceedings of the Seventh New England (Northeast) Bioengineering Conference, L. E. Ostrander, Ed. :482-485
Link
NIOSHTIC No.
00117992
Abstract
A model is presented for the gas trapping mechanism in excised lungs. The conditions necessary for the formation of pulmonary menisci, which include deflation of the lung, a sufficient volume of fluid in the airway, a sinusoidal disturbance amplitude close to zero, and a suitable surface tension, are described. Equations are given describing the movement of menisci from the airways to the alveoli and the pressure differential generated during transit. The diffusion of gases across pulmonary menisci and the effect of lung deflation on trapped gas are discussed. The authors conclude that this model explains trapped gas as a diffusion of gas across menisci that are blocking small airways of the excised lung during ventilation.
Keywords
Models; Pulmonary-function; Respiratory-gas-analysis; Respiratory-gas-transport; Respiratory-gases; Transport-mechanisms;
Document Type
Conference/Symposia Proceedings;
NTIS Accession No.
NTIS Price
Source Name
Proceedings of the Seventh New England (Northeast) Bioengineering Conference, L. E. Ostrander, Ed.
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