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Aboelnazar NS, Himmat S, Hatami S, White CW, Burhani MS, Dromparis P, Matsumura N, Tian G, Dyck JR, Mengel M, Freed DH, Nagendran J. Negative pressure ventilation decreases inflammation and lung edema during normothermic ex-vivo lung perfusion. J Heart Lung Transplant 2018; 37:520-530. [DOI: 10.1016/j.healun.2017.09.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 09/04/2017] [Accepted: 09/11/2017] [Indexed: 11/29/2022] Open
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Himmat S, Alzamil A, Aboelnazar N, Hatami S, White C, Dromparis P, Mengel M, Freed D, Nagendran J. A Decrease in Hypoxic Pulmonary Vasoconstriction Correlates With Increased Inflammation During Extended Normothermic Ex Vivo Lung Perfusion. Artif Organs 2017; 42:271-279. [PMID: 29266272 DOI: 10.1111/aor.13017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 07/12/2017] [Accepted: 08/04/2017] [Indexed: 02/06/2023]
Abstract
Normothermic ex vivo lung perfusion (EVLP) is an evolving technology to evaluate function of donor lungs to determine suitability for transplantation. We hypothesize that hypoxic pulmonary vasoconstriction (HPV) during EVLP will provide a more sensitive parameter of lung function to determine donor lung quality for lung transplantation. Eight porcine lungs were procured, and subsequently underwent EVLP with autologous blood and STEEN solution for 10 h. Standard physiologic parameters including dynamic compliance, peak airway pressure, and pulmonary vascular resistance (PVR) remained stable (P = 0.055), mean oxygenation (PO2 /FiO2 ) was 400 ± 18 mm Hg on average throughout perfusion. Response to hypoxia resulted in a robust increase in PVR (ΔPVR) up to 4 h of perfusion, however the HPV response then blunted beyond T6 (P < 0.01). The decrease in HPV response inversely correlated to cytokine concentrations of Interleukin-6 and tumor necrosis factor-α (P < 0.01). Despite acceptable lung oxygenation and standard physiologic parameters during 10 h of EVLP, there is a subclinical deterioration of lung function. HPV challenges can be performed during EVLP as a simple and more sensitive index of pulmonary vascular reactivity.
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Affiliation(s)
- Sayed Himmat
- Division of Cardiac Surgery, Department of Surgery, University of Alberta, Edmonton, Alberta, Canada.,Mazankowski Alberta Heart Institute, Edmonton, Alberta, Canada
| | - Almothana Alzamil
- Division of Cardiac Surgery, Department of Surgery, University of Alberta, Edmonton, Alberta, Canada.,Mazankowski Alberta Heart Institute, Edmonton, Alberta, Canada
| | - Nader Aboelnazar
- Division of Cardiac Surgery, Department of Surgery, University of Alberta, Edmonton, Alberta, Canada.,Mazankowski Alberta Heart Institute, Edmonton, Alberta, Canada
| | - Sanaz Hatami
- Division of Cardiac Surgery, Department of Surgery, University of Alberta, Edmonton, Alberta, Canada.,Mazankowski Alberta Heart Institute, Edmonton, Alberta, Canada
| | - Christopher White
- Division of Cardiac Surgery, Department of Surgery, University of Alberta, Edmonton, Alberta, Canada.,Mazankowski Alberta Heart Institute, Edmonton, Alberta, Canada
| | - Peter Dromparis
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - Michael Mengel
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - Darren Freed
- Division of Cardiac Surgery, Department of Surgery, University of Alberta, Edmonton, Alberta, Canada.,Mazankowski Alberta Heart Institute, Edmonton, Alberta, Canada.,Division of Cardiac Surgery, Department of Surgery, Alberta Transplant Institute, Edmonton, Alberta, Canada.,Canadian National Transplant Research Program, Canadian Institute for Health Research, Edmonton, Alberta, Canada
| | - Jayan Nagendran
- Division of Cardiac Surgery, Department of Surgery, University of Alberta, Edmonton, Alberta, Canada.,Mazankowski Alberta Heart Institute, Edmonton, Alberta, Canada.,Division of Cardiac Surgery, Department of Surgery, Alberta Transplant Institute, Edmonton, Alberta, Canada.,Canadian National Transplant Research Program, Canadian Institute for Health Research, Edmonton, Alberta, Canada
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