Significant parameters in the evaluation of donor lungs in single-lung cellular ex vivo lung perfusion

Hiromichi Niikawa, Toshihiro Okamoto, Kamal S. Ayyat, Yoshifumi Itoda, J. Steven Hata, Kenneth R. McCurry

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Objectives: Typically, single-lung ex vivo lung perfusion (SL-EVLP) is preferred when there is concern of contamination from the opposite lung. However, a comprehensive assessment of the SL-EVLP has not been completed. The purpose of this study is to compare the physiological parameters of SL-EVLP and double-lung EVLP (DL-EVLP) in the assessment of transplant suitability. Methods: Seven pairs of rejected donor lungs were perfused in cellular EVLP, with a tidal volume of 6 ml/kg ideal body weight and a perfusion flow of 70 ml/kg/min. The transplant suitability of each side was judged in the DL-EVLP. Subsequently, the tidal volume and flow were reduced by half. The right SL-EVLP was maintained for 10 min by clamping the left main pulmonary artery and the bronchus. Similarly, left SL-EVLP was performed. The physiological parameters were compared between SL-EVLP and DL-EVLP. Results: PO2/FiO2 ratio was significantly lower in SL-EVLP than in DL-EVLP [182.5 (127.5-309.5) vs 311.5 (257.5-377.0) mmHg, P < 0.001]. There was a significant correlation with a higher shunt fraction and PCO2 in the pulmonary vein in SL-EVLP when compared to DL-EVLP. There was no difference in peak inspiratory and plateau pressures between SL-EVLP and DL-EVLP. Suitable lungs (n = 6) were associated with better PO2/FiO2 ratios and lower airway pressures than non-suitable lungs (n = 8). Conclusions: In SL-EVLP, peak inspiratory and plateau pressures have clinical utility in the assessment of the transplant suitability. It is important that PO2/FiO2 ratio in SL-EVLP is appreciably lower than that in DL-EVLP. This discrepancy should be considered in the evaluation of the transplant suitability in SL-EVLP.

Original languageEnglish
Pages (from-to)767-774
Number of pages8
JournalInteractive cardiovascular and thoracic surgery
Volume28
Issue number5
DOIs
Publication statusPublished - 2019 May 1
Externally publishedYes

Keywords

  • Evaluation of donor lungs
  • Ex vivo lung perfusion
  • Single-lung ex vivo lung perfusion
  • Single-lung transplantation

ASJC Scopus subject areas

  • Surgery
  • Pulmonary and Respiratory Medicine
  • Cardiology and Cardiovascular Medicine

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