AJP - Heart and Circulatory Physiology, Vol 256, Issue 6 1711-H1718, Copyright © 1989 by American Physiological Society

ARTICLES

Pulmonary vascular permeability and resistance measurements in control and ANTU-injured dog lungs

R. C. Allison, B. Rippe, V. R. Prasad, J. C. Parker and A. E. Taylor
Department of Medicine, University of South Alabama, College of Medicine, Mobile 36688.

Because questions have arisen regarding pulmonary vascular permeability and resistance measurements in isolated, perfused lungs, we sought to determine the 1) stability of repeated measurements of permeability and resistance in control lungs; and 2) magnitude of change in these measurements when permeability was greatly increased. Using blood-perfused dog lungs, we measured filtration coefficient (Kf) and isogravimetric capillary pressure (Pci) as indexes of vascular permeability, and we also determined total vascular resistance (Rt) as well as the segmental resistances using the double-occlusion pressure (Pdo). In a control group (n = 8), the base-line measurement of Kf (0.21 +/- 0.02 ml.min-1.cmH2O-1.100 g-1) and Pci (10.2 +/- 0.9 cmH2O) did not change over 4 h, indicating no changes in endothelial barrier function. Base-line Rt (13.9 +/- 2.6 cmH2O.l-1.min.100 g) also did not significantly increase. In a second group (n = 5), alpha-naphthylthiourea (ANTU) increased the initial Kf more than eight times (from 0.17 +/- 0.03 to 1.40 +/- 0.32 ml.min-1.cmH2O-1.100 g-1) and decreased Pci by 56% (from 9.4 +/- 0.6 to 4.1 +/- 0.4 cmH2O) at 1 h, indicating severely damaged endothelium. In addition, the Pdo determined during isogravimetric conditions correlated very well with Pci not only in control lungs (observed previously) but also in very permeable lungs (not previously reported). We conclude that this experimental model provides an excellent means of assessing changes in pulmonary microvascular permeability, with a spectrum ranging from no changes in hourly measurements for 4 h to obvious changes in permeability by 1 h.

This article has been cited by other articles:

				P. A. Rothenbach, B. Dahl, J. J. Schwartz, G. E. O'Keefe, M. Yamamoto, W. M. Lee, J. W. Horton, H. L. Yin, and R. H. Turnage Recombinant plasma gelsolin infusion attenuates burn-induced pulmonary microvascular dysfunction J Appl Physiol, January 1, 2004; 96(1): 25 - 31. [Abstract] [Full Text] [PDF]

				J. K. Wright, L. T. Kim, T. E. Rogers, and R. H. Turnage Prostaglandins potentiate U-46619-induced pulmonary microvascular dysfunction J Appl Physiol, April 1, 2000; 88(4): 1167 - 1174. [Abstract] [Full Text] [PDF]

				B. P. Guery, S. Nelson, N. Viget, P. Fialdes, W. R. Summer, E. Dobard, G. Beaucaire, and C. M. Mason Fluorescein-labeled dextran concentration is increased in BAL fluid after ANTU-induced edema in rats J Appl Physiol, September 1, 1998; 85(3): 842 - 848. [Abstract] [Full Text] [PDF]

				R. H. Turnage, J. L. Lanoue, K. M. Kadesky, Y. Meng, and S. I. Myers Thromboxane A2 mediates increased pulmonary microvascular permeability after intestinal reperfusion J Appl Physiol, February 1, 1997; 82(2): 592 - 598. [Abstract] [Full Text] [PDF]