• Critical care medicine · Dec 1984

    Correlation of changes in oxygenation, lung water and hemodynamics after oleic acid-induced acute lung injury in dogs.

    • D P Schuster and E P Trulock.
    • Crit. Care Med. 1984 Dec 1; 12 (12): 1044-8.

    AbstractChanges in oxygenation after oleic acid (OA)-induced acute lung injury were correlated to changes in extravascular lung water (EVLW) and hemodynamics in 19 mongrel dogs. Three patterns seemed apparent. In group 1 (seven dogs) EVLW increased by 88% from control values but PaO2 fell only 15%. The change in PaO2 in this group was related directly to the change in mixed venous O2 tension (PvO2) after the OA-induced fall in cardiac output. In group 2 (eight dogs), EVLW rose by 120% and PaO2 fell 53%, 90 min after OA administration. In this group, there was a subsequent spontaneous improvement of PaO2 to 75% of control values, without any measured change in EVLW. In group 3 (four dogs), the fall in PaO2 was comparable to that of group 2, but the increase in EVLW was greater (148%) and there was no spontaneous improvement in oxygenation. Cardiac index fell in all three groups. A small but significant increase in PvO2 partially explains the improvement in oxygenation in group 2. We conclude that changes in oxygenation are a poor index of injury during this model of acute lung injury and that the course of oxygenation is directly related to measured changes in EVLW and hemodynamics.

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