Lung Thermal Volume as an Indicator of Pulmonary Extravascular Water

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Abstract
Double-indicator dilution methods were used for measurement of lung water. The thermal conductivity method is based on heat as a diffusible, and conductivity as a nondiffusible, indicator. Lung thermal volume was correlated with gravimetrical measurement of extravascular lung water after thrombin-induced microembolization in dog lungs. The embolization was accompanied by significantly increased vascular permeability and accumulation of interstitial water. Under these conditions there was a close correlation between the 2 methods of measuring lung water (r = 0.78, P < 0.01).

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