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The Journal of Thoracic and Cardiovascular Surgery, Vol 103, 1136-1142, Copyright © 1992 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association

ARTICLES

Reliable eighteen-hour lung preservation at 4 degrees and 10 degrees C by pulmonary artery flush after high-dose prostaglandin E1 administration

E Mayer, JD Puskas, PF Cardoso, S Shi, AS Slutsky and GA Patterson
Department of Surgery, University of Toronto, Toronto General Hospital, Ontario, Canada.

Pulmonary preservation is improved by hypothermia, but the optimal preservation temperature is not known. The effects of two different preservation temperatures, 4 degrees and 10 degrees C, on lung function were studied in a canine left lung allograft survival model allowing selective perfusion of either lung. After donor treatment with high- dose prostaglandin E1, (25 micrograms/kg), lungs were flushed with modified Euro-Collins solution (50 ml/kg) and stored in Euro-Collins solution for 18 hours at 4 degrees C in group I (n = 8) and 10 degrees C in group II (n = 6). Pulmonary gas exchange and hemodynamics were compared on the day of transplantation (day 0) and 3 days later (day 3). Rapid, high-flow, low-pressure flush was achieved uniformly in both groups (flush time: group I, 35.1 +/- 2.4 second; group II, 35.3 +/- 3.0 seconds; p = 0.96; flush pressure: group I, 9.8 +/- 0.7 mm Hg; group II, 10.1 +/- 1.1 mm Hg; p = 0.8). Transplanted lungs provided similar excellent oxygenation in both groups on day 0 (arterial oxygen tension, group I, 451 +/- 82 mm Hg; group II, 497 +/- 37 mm Hg; p = 0.61; inspired oxygen fraction = 1.0) and day 3 (arterial oxygen tension, group I, 551 +/- 57 mm Hg; group II, 587 +/- 19 mm Hg; p = 0.55), with a statistically significant improvement from day 0 to day 3 in both groups (group I, p = 0.034; group II, p = 0.038). There was no difference in arterial carbon dioxide tension, base excess, cardiac output, blood pressure or pulmonary artery pressure between the two groups. We conclude that a large bolus of prostaglandin E1 into the pulmonary artery produces a high-flow, low-pressure flush with modified Euro-Collins solution; with this technique, equivalent, reliable 18- hour lung preservation can be achieved at 4 degrees and 10 degrees C flush and storage temperatures.

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