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Chest, Vol 102, 417-421, Copyright © 1992 by American College of Chest Physicians

ARTICLES

Pulmonary endothelial permeability following lung transplantation

DN Hunter, CJ Morgan, M Yacoub and TW Evans
Department of Intensive Care, Royal Brompton National Heart and Lung Hospital, London.

During lung transplantation, a number of factors may cause endothelial injury to the donor organ, including ischemia, inadequate preservation, cardiopulmonary bypass, high potassium concentrations, and reperfusion. In this study, protein accumulation index (PAI) was used to assess pulmonary endothelial permeability (PEP) in ten patients immediately after lung transplantation. Six were studied sequentially every other day for ten days postoperatively. The PAI was also measured using the same technique in a group of 11 normal volunteers. Mean PAI x 10(- 3)/min +/- (SEM) for ten patients measured within 36 h of transplantation was 1.27 (0.56) compared with 0.45 (0.08) for the normal group (p = 0.09). No correlation was found between preservation time and PAI following reperfusion. Three episodes of lung rejection were observed in two patients during the first ten postoperative days, during which PAI rose to 2.26 (0.26) compared with 0.73 (0.11) for all other studies in the group (p less than 0.01). We conclude that no increase in PEP could be demonstrated after graft reperfusion following lung transplantation as assessed by PAI in this small group of patients. However, further studies may show the technique to be useful in the detection of subsequent episodes of graft rejection.


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