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Ann Thorac Surg 2000;69:887-891
© 2000 The Society of Thoracic Surgeons

Original Articles

Significance of cyclic adenosine monophosphate and nitroglycerin in ET-Kyoto solution for lung preservation

Toru Bando, MDa,b, Johannes M. Albes, MDa, Jörg Schöne, BSa, Hiromi Wada, MDb, Shigeki Hitomi, MDb, Thorsten Wahlers, MDa, Hans-Joachim Schäfers, MDa

a Division of Thoracic and Cardiovascular Surgery, Hannover Medical School, Hannover, Germany
b Department of Thoracic Surgery, Faculty of Medicine, Kyoto University, Kyoto, Japan

Background. We previously demonstrated that the supplement of both dibutyryl cyclic adenosine monophosphate (db-cAMP) and nitroglycerin to the conventional ET-Kyoto solution improved lung preservation significantly. However, the significance of each component in lung preservation remained unclear. We examined the efficacy of the two components on lung preservation in the current study.

Methods. Rat lung grafts (eight per group) were studied in an isolated lung perfusion model. Group 1 grafts were flushed and preserved with ET-Kyoto solution containing 2 mmol/L of db-cAMP. Group 2 grafts were flushed and preserved with ET-Kyoto solution containing 100 mg/L of nitroglycerin. In group 3, the grafts were flushed and preserved with ET-Kyoto solution containing neither db-cAMP nor nitroglycerin as control group. After 4-hour cold storage, the lung grafts were reperfused for 50 minutes.

Results. The lung grafts in groups 1 and 2 showed significantly better lung function after reperfusion than those in group 3 with regard to arterial oxygen tension, shunt fraction, peak inspiratory airway pressure, mean pulmonary arterial pressure, and pulmonary vascular resistance. The supplementation of db-cAMP improved especially the pulmonary arterial pressure and pulmonary vascular resistance, while the supplementation of nitroglycerin improved especially the oxygenation and airway pressure of the grafts.

Conclusions. Both of db-cAMP and nitroglycerin had beneficial effects on lung preservation and are essential to the ET-Kyoto solution. There was a difference between the two components in the effects on preserved lungs.


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Ann. Thorac. Surg. 2000 69: 891-892. [Extract] [Full Text] [PDF]



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