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Ukita R, Stokes JW, Wu WK, Patel YJ, Talackine JR, Cardwell N, Benson C, Lefevre RJ, Eagle S, Demarest C, Simonds E, Tipograf Y, Cortelli M, Skoog DJ, Cook K, Rosenzweig EB, Bacchetta M. Large animal preclinical investigation into the optimal extracorporeal life support configuration for pulmonary hypertension and right ventricular failure. J Heart Lung Transplant 2022:S1053-2498(22)02205-7. [PMID: 36435685 PMCID: PMC10163172 DOI: 10.1016/j.healun.2022.10.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 10/04/2022] [Accepted: 10/31/2022] [Indexed: 11/08/2022] Open
Abstract
INTRODUCTION Right ventricular failure (RVF) is a major cause of mortality in pulmonary hypertension (PH). Mechanical circulatory support holds promise for patients with medically refractory PH, but there are no clinical devices for long-term right ventricular (RV) support. Investigations into optimal device parameters and circuit configurations for PH-induced RVF (PH-RVF) are needed. METHODS Eleven sheep underwent previously published chronic PH model. We then evaluated a low-profile, ventricular assist device (VAD)-quality pump combined with a novel low-resistance membrane oxygenator (Pulmonary Assist Device, PAD) under one of four central cannulation strategies: right atrium-to-left atrium (RA-LA, N = 3), RA-to-pulmonary artery (RA-PA, N=3), pumpless pulmonary artery-to-left atrium (PA-LA, N = 2), and RA-to-ascending aorta (RA-Ao, N = 3). Acute-on-chronic RVF (AoC RVF) was induced, and mechanical support was provided for up to 6 hours at blood flow rates of 1 to 3 liter/min. Circuit parameters, physiologic, hemodynamic, and echocardiography data were collected. RESULTS The RA-LA configuration achieved blood flow of 3 liter/min. Meanwhile, RA-PA and RA-Ao faced challenges maintaining 3 liter/min of flow due to higher circuit afterload. Pumpless PA-LA was flow-limited due to anatomical limitations inherent to this animal model. RA-LA and RA-Ao demonstrated serial RV unloading with increasing circuit flow, while RA-PA did not. RA-LA also improved left ventricular (LV) and septal geometry by echocardiographic assessment and had the lowest inotropic dependence. CONCLUSION RA-LA and RA-Ao configurations unload the RV, while RA-LA also lowers pump speed and inotropic requirements, and improves LV mechanics. RA-PA provide inferior support for PH-RVF, while an alternate animal model is needed to evaluate PA-LA.
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Balik M, Rulisek J, Flaksa M, Porizka M, Mosna F, Lindner J, Heller S, Belohlavek J, Adla T, Schmid C, Philipp A, Havlin J, Burkert J, Lischke R. A patient with pulmonary hypertension waiting for donor lungs during the pandemic: 194 days on extracorporeal life support including 143 days on pulmonary artery to left atrium shunt. Am J Transplant 2022; 22:2094-2098. [PMID: 35000286 DOI: 10.1111/ajt.16949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 12/16/2021] [Accepted: 01/03/2022] [Indexed: 01/25/2023]
Abstract
Patients with pulmonary hypertension and end-stage lung disease are fraught with high mortality while on a waiting list for lung transplant. With sometimes rapid deterioration they may require veno-arterial extracorporeal membrane oxygenation (VA-ECMO) as an immediate life-saving technique, which is a time-limited solution. The technique of pulmonary artery to left atrium (PA-LA) shunt fitted with an oxygenator enables bridging the patient to transplant for a longer time period. This low-resistance paracorporeal pumpless lung assist device allows for de-adaptation of the right ventricle back to lower afterload before the lung transplantation is carried out. The PA-LA shunt with an oxygenator also conveys a risk of multiple complications with reported median of 10-26 days until transplant. We report a case of pulmonary capillary hemangiomatosis in a 35-year-old female who had to wait for donor lungs during the pandemic of SARS-CoV-2 for 143 days on PA-LA shunt with oxygenator following 51 days on VA-ECMO. The extremely long course associated with multiple complications including three cerebral embolisms, episodes of sepsis and ingrowth of the return cannula into the left ventricular wall gives insight into the limits of this bridging technique.
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Affiliation(s)
- Martin Balik
- Department of Anaesthesiology and Intensive Care, 1st Faculty of Medicine, Charles University and General University Hospital, Prague, Czechia
| | - Jan Rulisek
- Department of Anaesthesiology and Intensive Care, 1st Faculty of Medicine, Charles University and General University Hospital, Prague, Czechia
| | - Marek Flaksa
- Department of Anaesthesiology and Intensive Care, 1st Faculty of Medicine, Charles University and General University Hospital, Prague, Czechia
| | - Michal Porizka
- Department of Anaesthesiology and Intensive Care, 1st Faculty of Medicine, Charles University and General University Hospital, Prague, Czechia
| | - Frantisek Mosna
- Department of Anaesthesiology and Intensive Care, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, Prague, Czechia
| | - Jaroslav Lindner
- Department of Cardiovascular Surgery, 1st Faculty of Medicine, Charles University and General University Hospital, Prague, Czechia
| | - Samuel Heller
- 2nd Department of Internal Medicine-Department of Cardiovascular Medicine, 1st Faculty of Medicine, Charles University and General University Hospital, Prague, Czechia
| | - Jan Belohlavek
- 2nd Department of Internal Medicine-Department of Cardiovascular Medicine, 1st Faculty of Medicine, Charles University and General University Hospital, Prague, Czechia
| | - Theodor Adla
- Department of Diagnostic and Interventional Radiology, Institute for Clinical and Experimental Medicine, Prague, Czechia
| | - Christof Schmid
- Department of Cardiothoracic Surgery, University Medical Center Regensburg, Regensburg, Germany
| | - Alois Philipp
- Department of Cardiothoracic Surgery, University Medical Center Regensburg, Regensburg, Germany
| | - Jan Havlin
- Prague Lung Transplant Program, 3rd Department of Surgery, 1st Faculty of Medicine, Charles University in Prague and Motol University Hospital, Prague, Czechia
| | - Jan Burkert
- Prague Lung Transplant Program, 3rd Department of Surgery, 1st Faculty of Medicine, Charles University in Prague and Motol University Hospital, Prague, Czechia
| | - Robert Lischke
- Prague Lung Transplant Program, 3rd Department of Surgery, 1st Faculty of Medicine, Charles University in Prague and Motol University Hospital, Prague, Czechia
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Sommer W, Warnecke G. Lung transplantation for pediatric pulmonary arterial hypertension-quo vadis? Cardiovasc Diagn Ther 2021; 11:1178-1189. [PMID: 34527542 DOI: 10.21037/cdt-21-65] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 06/23/2021] [Indexed: 11/06/2022]
Abstract
In children with pulmonary arterial hypertension, lung transplantation illustrates a feasible treatment option once pharmacological therapy is exhausted. Timing of listing for lung transplantation in children remains difficult since hemodynamic deterioration often occurs abruptly and the time on the waiting list is usually hard to predict. Clear contraindications for lung transplantation are recent history of malignancies as well as irreversible end-organ failure. Generally, patients with pulmonary arterial hypertension in the absence of structural cardiac defects can safely undergo bilateral lung transplantation, combined heart-lung transplantation remains a procedure with a higher perioperative risk and should only be performed in selected cases with irreversible structural defects. Donor selection in recent years shows donors with extended criteria as well as lobar transplantation with good outcome, having the positive effect of broadening of the donor pool. Bridging to lung transplantation with veno-arterial ECMO treatment is feasible and has a good outcome in experienced transplant centers. Surgical considerations should include the risk of hemodynamic decompensation upon anesthesia induction and the need for extracorporeal support pre-, intra- and postoperative. Lung transplantation should be performed on veno-arterial ECMO support with either peripheral (>20 kg) or central cannulation (<20 kg). The surgical transplantation procedure includes the bronchial anastomosis as well as anastomoses of the pulmonary artery and the left atrium. Postoperative prolonged veno-arterial ECMO treatment for the immediate postoperative period allows for left ventricular remodeling given the new hemodynamic circumstances with lower pulmonary vascular resistance. Standard triple immunosuppression in most lung transplant programs currently includes steroids, mycophenolate mofetil and tacrolimus. Survival after pediatric lung transplantation for IPAH is comparable to pediatric lung transplants for other underlying diseases with a 1-year survival of approx. 80% and a 5-year survival of 64-65%. Therefore, evolving techniques in the field of lung transplantation led to overall improved survival prospects in children with end-stage pulmonary vascular disease.
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Affiliation(s)
- Wiebke Sommer
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | - Gregor Warnecke
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
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Blauvelt DG, Abada EN, Oishi P, Roy S. Advances in extracorporeal membrane oxygenator design for artificial placenta technology. Artif Organs 2021; 45:205-221. [PMID: 32979857 PMCID: PMC8513573 DOI: 10.1111/aor.13827] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/28/2020] [Accepted: 09/10/2020] [Indexed: 12/15/2022]
Abstract
Extreme prematurity, defined as a gestational age of fewer than 28 weeks, is a significant health problem worldwide. It carries a high burden of mortality and morbidity, in large part due to the immaturity of the lungs at this stage of development. The standard of care for these patients includes support with mechanical ventilation, which exacerbates lung pathology. Extracorporeal life support (ECLS), also called artificial placenta technology when applied to extremely preterm (EPT) infants, offers an intriguing solution. ECLS involves providing gas exchange via an extracorporeal device, thereby doing the work of the lungs and allowing them to develop without being subjected to injurious mechanical ventilation. While ECLS has been successfully used in respiratory failure in full-term neonates, children, and adults, it has not been applied effectively to the EPT patient population. In this review, we discuss the unique aspects of EPT infants and the challenges of applying ECLS to these patients. In addition, we review recent progress in artificial placenta technology development. We then offer analysis on design considerations for successful engineering of a membrane oxygenator for an artificial placenta circuit. Finally, we examine next-generation oxygenators that might advance the development of artificial placenta devices.
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Affiliation(s)
- David G. Blauvelt
- Department of Pediatrics, University of California, San Francisco, California
| | - Emily N. Abada
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, California
| | - Peter Oishi
- Department of Pediatrics, University of California, San Francisco, California
| | - Shuvo Roy
- Department of Pediatrics, University of California, San Francisco, California
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Abstract
Lung transplantation is an accepted therapeutic option for end-stage lung diseases. Its history starts in the 1940s, initially hampered by early deaths due to perioperative problems and acute rejection. Improvement of surgical techniques and the introduction of immunosuppressive drugs resulted in longer survival. Chronic lung allograft dysfunction (CLAD), a new complication appeared and remains the most serious complication today. CLAD, the main reason why survival after lung transplantation is impaired compared to other solid-organ transplantations is characterized by a gradually increasing shortness of breath, reflected in a deterioration of pulmonary function status, respiratory insufficiency and possibly death.
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Hoetzenecker K, Donahoe L, Yeung JC, Azad S, Fan E, Ferguson ND, Del Sorbo L, de Perrot M, Pierre A, Yasufuku K, Singer L, Waddell TK, Keshavjee S, Cypel M. Extracorporeal life support as a bridge to lung transplantation-experience of a high-volume transplant center. J Thorac Cardiovasc Surg 2017; 155:1316-1328.e1. [PMID: 29248282 DOI: 10.1016/j.jtcvs.2017.09.161] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Revised: 09/10/2017] [Accepted: 09/30/2017] [Indexed: 12/12/2022]
Abstract
OBJECTIVES Extracorporeal life support (ECLS) is increasingly used to bridge deteriorating patients awaiting lung transplantation (LTx), however, few systematic descriptions of this practice exist. We therefore aimed to review our institutional experience over the past 10 years. METHODS In this case series, we included all adults who received ECLS with the intent to bridge to LTx. Data were retrieved from patient charts and our institutional ECLS and transplant databases. RESULTS Between January 2006 and September 2016, 1111 LTx were performed in our institution. ECLS was used in 71 adults with the intention to bridge to LTx; of these, 11 (16%) were bridged to retransplantation. The median duration of ECLS before LTx was 10 days (range, 0-95). We used a single dual-lumen venous cannula in 23 patients (32%). Nine of 13 patients (69%) with pulmonary hypertension were bridged by central pulmonary artery to left atrium Novalung. Twenty-five patients (35%) were extubated while on ECLS and 26 patients (37%) were mobilized. Sixty-three patients (89%) survived to LTx. Survival by intention to treat was 66% (1 year), 58% (3 years) and 48% (5 years). Survival was significantly shorter in patients undergoing ECLS bridge to retransplantation compared with first LTx (median survival, 15 months (95% CI, 0-31) versus 60 months (95% CI, 37-83); P = .041). CONCLUSIONS In our center experience, ECLS bridge to first lung transplant leads to good short-term and long-term outcomes in carefully selected patients. In contrast, our data suggest that ECLS as a bridge to retransplantation should be used with caution.
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Affiliation(s)
- Konrad Hoetzenecker
- Toronto Lung Transplant Program, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada; Department of Thoracic Surgery, Medical University of Vienna, Vienna, Austria
| | - Laura Donahoe
- Toronto Lung Transplant Program, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Jonathan C Yeung
- Toronto Lung Transplant Program, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Sassan Azad
- Toronto Lung Transplant Program, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Eddy Fan
- Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Niall D Ferguson
- Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Lorenzo Del Sorbo
- Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Marc de Perrot
- Toronto Lung Transplant Program, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Andrew Pierre
- Toronto Lung Transplant Program, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Kazuhiro Yasufuku
- Toronto Lung Transplant Program, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Lianne Singer
- Toronto Lung Transplant Program, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Thomas K Waddell
- Toronto Lung Transplant Program, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Shaf Keshavjee
- Toronto Lung Transplant Program, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Marcelo Cypel
- Toronto Lung Transplant Program, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada.
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Pavlushkov E, Berman M, Valchanov K. Cannulation techniques for extracorporeal life support. ANNALS OF TRANSLATIONAL MEDICINE 2017; 5:70. [PMID: 28275615 DOI: 10.21037/atm.2016.11.47] [Citation(s) in RCA: 106] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The article reviews cannulation strategy for different modes of extracorporeal life support. Technical aspects, pitfalls and complications are discussed for central and peripheral extracorporeal membrane oxygenation (VA, VV, VAV, VVA), biventricular assist device support and extracorporeal CO2 removal.
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Affiliation(s)
| | - Marius Berman
- Papworth Hospital, Papworth Everard, Cambridge, CB23 3RE, UK
| | - Kamen Valchanov
- Papworth Hospital, Papworth Everard, Cambridge, CB23 3RE, UK
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de Asua I, Rosenberg A. On the right side of the heart: Medical and mechanical support of the failing right ventricle. J Intensive Care Soc 2017; 18:113-120. [PMID: 28979557 DOI: 10.1177/1751143716684357] [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] [Indexed: 12/25/2022] Open
Abstract
Acute right ventricular failure remains an immensely challenging clinical condition associated with a high mortality rate. In this narrative review, we highlight the pathophysiological mechanisms underlying right ventricular failure and suggest an initial diagnostic approach to this critically ill group of patients. Based on the best available evidence and our cumulative clinical experience as a national cardiothoracic centre, we summarize the basic principles of medical management and mechanical salvage therapy, finalizing with a series of recommendations for the management of right ventricular failure in specific clinical scenarios.
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Affiliation(s)
- Ignacio de Asua
- Department of Intensive Care, Harefield Hospital, London, UK
| | - Alex Rosenberg
- Department of Intensive Care, Harefield Hospital, London, UK
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Adversity in Neonates and Children with Pulmonary Artery Hypertension: The Role of ECMO. ASAIO J 2016; 62:637-638. [DOI: 10.1097/mat.0000000000000459] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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