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Ann Thorac Surg 2006;82:1998-2002
© 2006 The Society of Thoracic Surgeons

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Original Articles: General Thoracic

Differential Pulmonary Vein Gases Predict Primary Graft Dysfunction

Department of Cardiopulmonary Transplantation, Freeman Hospital, High Heaton, Newcastle upon Tyne, United Kingdom

Accepted for publication July 13, 2006.

^_* Address correspondence to Dr Botha, Department of Cardiopulmonary Transplantation, Freeman Hospital, Newcastle upon Tyne, NE7 7DN, United Kingdom (Email: p.botha{at}ncl.ac.uk).

Presented at the Poster Session of the Forty-second Annual Meeting of The Society of Thoracic Surgeons, Chicago, IL, Jan 30–Feb 1, 2006.

BACKGROUND: Donor arterial blood gas measurements correlate poorly with lung allograft function in the recipient. We assessed the utility of reduced pulmonary vein gas (PVG) partial pressure of oxygen (PO ₂) in predicting the incidence of primary graft dysfunction.

METHODS: While the donor was ventilated with 100% oxygen, superior and inferior pulmonary veins were directly aspirated bilaterally and pulmonary venous PO ₂ measured. A PO ₂ of less than 300 mm Hg was considered subnormal. These values were assessed for predictive value in terms of primary graft dysfunction in univariate and multivariate analysis.

RESULTS: In 112 of the 201 lung and heart-lung transplants performed during the period January 2000 to December 2004, full PVGs were available for analysis. The number of pulmonary veins with sub-normal PVG correlated significantly with the incidence of severe primary graft dysfunction posttransplant in univariate (p = 0.01) and multivariate analysis (hazard ratio 2.35, p = 0.016). When analyzed separately, this correlation remained significant for recipients of single or bilateral transplants alone. No correlation existed between arterial PO ₂ at donor referral and incidence of primary graft dysfunction. Median duration of ventilation, intensive care unit stay, and 30-day and 90-day mortality were not significantly different for those with any subnormal PVG compared with those with all values in the normal range.

CONCLUSIONS: Differential PVGs are a useful tool in the assessment of donor lung function before procurement. It is a helpful indicator of whether preischemic dysfunction is localized or diffuse, and can be used to predict the extent to which ischemia and reperfusion will exacerbate any existing abnormality.

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