Native Lung Pulmonary Artery Banding After Single-Lung Transplant for Obliterative Bronchiolitis.

Single-lung transplantation (LTx) is an option for lung injury after bone marrow transplantation. We report a patient who underwent right single LTx for obliterative bronchiolitis after bone marrow transplantation and suffered post-LTx hypoxemia because of a marked ventilation-perfusion mismatch in his native lung. Pulmonary artery banding at 78 days after LTx decreased pulmonary arterial flow to the native lung and successfully resolved the hypoxemia. When we encounter hypoxemia after single LTx, ventilation-perfusion mismatch in the native lung should be considered as a possible diagnosis and surgical pulmonary artery banding is a feasible option.