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  • Title: Unilateral lung transplantation using right and left upper lobes: an experimental study.
    Author: Nishikawa H, Oto T, Otani S, Harada M, Iga N, Miyoshi K, Miyoshi S.
    Journal: J Thorac Cardiovasc Surg; 2013 Dec; 146(6):1534-7. PubMed ID: 24079876.
    Abstract:
    OBJECTIVE: The shortage of organ donors is a serious problem in Japan. The right and left upper lobes of rejected extended-criteria lungs have the potential to be used for downsized lung transplantation; however, the 2 upper lobes are too small for a size-matched recipient. The present study investigated the feasibility of unilateral transplantation using the right and left upper lobes. METHODS: After harvesting the heart-lung block from donor swine, a left lung graft was created using the right and left upper lobes and transplanted into the left thoracic space of the recipient swine (group A, n = 5). We then evaluated graft function for 6 hours and compared these results with those of a control group (group B, n = 5), in which orthotopic left lung transplantation had been performed. RESULTS: The mean partial pressure of oxygen in the arterial blood gas after reperfusion was 507 mm Hg in group A and 463 mm Hg in group B (P = .2). The mean pulmonary arterial pressure was 30.3 mm Hg in group A and 27.5 mm Hg in group B (P = .4). The mean airway pressure was 6.4 mm Hg in group A and 6.2 mm Hg in group B (P = .7). CONCLUSIONS: Our results suggest that unilateral left lung transplantation using the right and left upper lobes is technically and functionally feasible for size-matched recipients. In addition, this technique enables the use of rejected lungs if the upper lobes are still intact.
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