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Ultrastructural damage to the preserved lung and its function after reperfusion
Shinji Kosaka1, Mitsuhiro Ueda, Toru Bando
1Department of Thoracic Surgery, Kyoto University Hospital, Kyoto, Japan.
The Japanese Journal of Thoracic and Cardiovascular Surgery : Official Publication of the Japanese Association for Thoracic Surgery = Nihon Kyobu Geka Gakkai Zasshi
|February 22, 2002
Summary
Severe lung damage during cold storage, particularly to endothelial cells and pneumocytes, impairs transplanted lung function after reperfusion. This intracellular structural damage increases the risk of early graft failure in lung transplantation.
Area of Science:
- Transplantation Biology
- Organ Preservation
- Pulmonary Medicine
Background:
- Lung transplantation is a life-saving procedure for end-stage lung disease.
- Graft dysfunction after reperfusion remains a significant challenge.
- Understanding the impact of cold storage injury is crucial for improving outcomes.
Purpose of the Study:
- To identify specific ultrastructural lung damage during cold storage that affects transplanted lung function post-reperfusion.
- To correlate lung preservation injury with early graft failure indicators.
Main Methods:
- Examined ultrastructural damage in preserved lungs before reperfusion in dogs.
- Assessed transplanted lung function by measuring pulmonary artery oxygen pressure and wet-to-dry-weight ratio.
- Compared findings between surviving and non-surviving groups post-reperfusion.
Main Results:
- Higher frequencies of endothelial cell protrusion/destruction and pneumocyte vacuolization were observed in non-survivors.
- Significant correlations were found between specific ultrastructural damages (endothelial cell and pneumocyte vacuolization) and pulmonary artery oxygen pressure post-reperfusion.
- Pneumocyte vacuolization correlated with the wet-to-dry-weight ratio, indicating edema.
Conclusions:
- Severe intracellular structural damage to the lung during hypothermic preservation compromises post-reperfusion function.
- Such damage is a strong predictor of early graft failure in lung transplantation.
- Minimizing cellular damage during cold storage is critical for successful lung allograft survival.