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  • Title: Simulation of the vertical gradient of transpulmonary pressure by stable foams.
    Author: Warner DO, Rehder K, Hyatt RE.
    Journal: J Appl Physiol (1985); 1986 Sep; 61(3):1221-5. PubMed ID: 3759762.
    Abstract:
    We describe a simulation of the vertical gradient of transpulmonary pressure (VGTP) using a stable foam, which is suitable for use in studies of the effect of the VGTP on excised lungs. We generated foams that produced linear hydrostatic pressure gradients (HPGs) from 0.18 to 0.44 cmH2O/cm depth, which were stable over time and were reproducible. The HPG was similar under static and dynamic conditions. The foam did not affect lung elastic properties or cause histological changes. We conclude that these stable foams provide a practical, inexpensive simulation of the VGTP and should be useful in studying the effects of the VGTP on regional lung behavior.
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