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- W2412370219 abstract "The autoperfused working heart-lung preparation has been proposed as a method for long-term heart-lung preservation. We investigated the effects of acellular oxygen-carrying perfusates (study 1) and the effect of donor pretreatment with indomethacin (study 2) on the working ex vivo heart-lung block. In study 1 perfusion with stroma-fee hemoglobin resulted in significantly reduced survival (118 +/- 46 minutes) compared with autologous blood (561 +/- 125 minutes, p less than 0.05) or perfluorocarbon (438 +/- 114 minutes, p less than 0.05). Decrease in survival with stroma-free hemoglobin perfusate is associated with a marked decrease in left ventricular performance and a significant increase in pulmonary vascular resistance. Perfusion with autologous blood is associated with a significant increase in pulmonary vascular resistance after 240 minutes of explantation, which is significantly delayed by perfusion with perfluorocarbon. Perfusion for 6 hours with blood pretreated with indomethacin (study 2) resulted in a decrease in the concentration of prostacyclin and thromboxane A2 metabolites but an increase in the prostaglandin/thromboxane A2 metabolite ratio. This is associated with abrogation of the increase in pulmonary vascular resistance (12,787 +/- 1682 dynes/sec/cm-5, T = 0; 13,134 +/- 2654 dynes/sec/cm-5, T = 360 minutes) observed in preparations perfused with autologous blood (13,194 +/- 1942 dynes/sec/cm-5, T = 0; 24,768 +/- 3325 dynes/sec/cm-5, T = 360 minutes, p less than 0.05). We conclude that alteration of the cellular and humoral components of autologous blood may prove advantageous for increasing the utility of the autoperfused working heart-lung preparation as a preservation technique." @default.
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- W2412370219 date "1990-11-01" @default.
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- W2412370219 title "Extended ex vivo preservation of the heart and lungs. Effects of acellular oxygen-carrying perfusates and indomethacin on the autoperfused working heart-lung preparation." @default.
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