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Chilvers NJ, Jeyakanthan M, Butt T, Crossland D, Dark JH, Ferraresi F, Hasan A, Hebala M, Jungschleger J, Khawaja M, MacGowan G, Nassar M, Robson J, Warburton J, Kenny L. The long-awaited solution for pediatric DCD heart transplantation? Comment on Brouckaert et al. J Heart Lung Transplant 2024:S1053-2498(24)01863-1. [PMID: 39293552 DOI: 10.1016/j.healun.2024.09.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2024] [Accepted: 09/11/2024] [Indexed: 09/20/2024] Open
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Chilvers N, Dark JH. Commentary: Total ventricular mass: Too much of a good thing? J Thorac Cardiovasc Surg 2023; 166:1155-1156. [PMID: 35610072 DOI: 10.1016/j.jtcvs.2022.04.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 04/15/2022] [Accepted: 04/16/2022] [Indexed: 11/16/2022]
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Greenhall GHB, Rous BA, Robb ML, Brown C, Hardman G, Hilton RM, Neuberger JM, Dark JH, Johnson RJ, Forsythe JLR, Tomlinson LA, Callaghan CJ, Watson CJE. Organ Transplants From Deceased Donors With Primary Brain Tumors and Risk of Cancer Transmission. JAMA Surg 2023; 158:504-513. [PMID: 36947028 PMCID: PMC10034666 DOI: 10.1001/jamasurg.2022.8419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
Importance Cancer transmission is a known risk for recipients of organ transplants. Many people wait a long time for a suitable transplant; some never receive one. Although patients with brain tumors may donate their organs, opinions vary on the risks involved. Objective To determine the risk of cancer transmission associated with organ transplants from deceased donors with primary brain tumors. Key secondary objectives were to investigate the association that donor brain tumors have with organ usage and posttransplant survival. Design, Setting, and Participants This was a cohort study in England and Scotland, conducted from January 1, 2000, to December 31, 2016, with follow-up to December 31, 2020. This study used linked data on deceased donors and solid organ transplant recipients with valid national patient identifier numbers from the UK Transplant Registry, the National Cancer Registration and Analysis Service (England), and the Scottish Cancer Registry. For secondary analyses, comparators were matched on factors that may influence the likelihood of organ usage or transplant failure. Statistical analysis of study data took place from October 1, 2021, to May 31, 2022. Exposures A history of primary brain tumor in the organ donor, identified from all 3 data sources using disease codes. Main Outcomes and Measures Transmission of brain tumor from the organ donor into the transplant recipient. Secondary outcomes were organ utilization (ie, transplant of an offered organ) and survival of kidney, liver, heart, and lung transplants and their recipients. Key covariates in donors with brain tumors were tumor grade and treatment history. Results This study included a total of 282 donors (median [IQR] age, 42 [33-54] years; 154 females [55%]) with primary brain tumors and 887 transplants from them, 778 (88%) of which were analyzed for the primary outcome. There were 262 transplants from donors with high-grade tumors and 494 from donors with prior neurosurgical intervention or radiotherapy. Median (IQR) recipient age was 48 (35-58) years, and 476 (61%) were male. Among 83 posttransplant malignancies (excluding NMSC) that occurred over a median (IQR) of 6 (3-9) years in 79 recipients of transplants from donors with brain tumors, none were of a histological type matching the donor brain tumor. Transplant survival was equivalent to that of matched controls. Kidney, liver, and lung utilization were lower in donors with high-grade brain tumors compared with matched controls. Conclusions and Relevance Results of this cohort study suggest that the risk of cancer transmission in transplants from deceased donors with primary brain tumors was lower than previously thought, even in the context of donors that are considered as higher risk. Long-term transplant outcomes are favorable. These results suggest that it may be possible to safely expand organ usage from this donor group.
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Wang L, Dark JH. Commentary: One more obstacle knocked out. J Thorac Cardiovasc Surg 2023; 165:e82-e83. [PMID: 34454734 DOI: 10.1016/j.jtcvs.2021.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 08/01/2021] [Accepted: 08/03/2021] [Indexed: 01/18/2023]
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Andreasson ASI, Dark JH. Revascularisation of the bronchial arteries in pulmonary transplant; does it ever have a role? J Thorac Dis 2022; 14:4578-4581. [PMID: 36647493 PMCID: PMC9840030 DOI: 10.21037/jtd-22-1368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 11/04/2022] [Indexed: 12/03/2022]
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Funston W, Ruchaud-Sparagano MH, Scott J, Powell J, Cooles FAH, Shelmerdine L, McDowell C, O’Leary D, Booth KL, Clark SC, Ledingham SJ, Rostron AJ, Dark JH, Simpson AJ. A human model of bilateral pulmonary vein sampling to assess the effects of one-lung ventilation on neutrophil function. PLoS One 2022; 17:e0271958. [PMID: 35881612 PMCID: PMC9321419 DOI: 10.1371/journal.pone.0271958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Accepted: 07/11/2022] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Neutrophil activation drives lung complications after cardiopulmonary bypass (CPB). Evidence suggests the healthy, ventilated lung may beneficially re-condition pro-inflammatory neutrophils. However, evidence in humans is lacking, due to a paucity of good models. CPB with simultaneous central venous and bilateral pulmonary vein sampling provides an opportunity to model effects of one-lung ventilation. The study's primary objectives were to establish a model of intra-operative, bilateral pulmonary vein sampling and to determine whether neutrophil function differed after passing through inflated or deflated lungs. METHODS Seventeen patients having "on pump" coronary artery bypass grafting (CABG) with one-lung ventilation (in two cohorts with tidal volume 2ml kg-1 and FiO2 0.21, or tidal volume 4 ml kg-1 and FiO2 0.5 respectively) were recruited. Cohort 1 consisted of 9 patients (7 male, median age 62.0 years) and Cohort 2 consisted of 8 male patients (median age 65.5 years). Recruitment was via prospective screening of scheduled elective and non-elective CABG procedures with cardiopulmonary bypass. Each patient had five blood samples taken-central venous blood pre-operatively; central venous blood pre-CPB; central venous blood post-CPB; pulmonary venous blood draining the ventilated lung post-CPB; and pulmonary venous blood draining the deflated lung post-CPB. Neutrophil phagocytosis and priming status were quantified. Plasma cytokines were measured. RESULTS Phagocytosis and priming were not significantly different in neutrophils returning from the ventilated lung as compared to the non-ventilated lung. Plasma IL-6, IL-8 and IL-10 were significantly elevated by CPB. CONCLUSIONS The intra-operative, bilateral pulmonary vein sampling model provides unique opportunities to assess biological effects of interventions to one lung, with the other lung acting as an internal control. Single-lung ventilation during CPB had no significant effects on neutrophil function.
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De Beule J, Vandendriessche K, Pengel LHM, Bellini MI, Dark JH, Hessheimer AJ, Kimenai HJAN, Knight SR, Neyrinck AP, Paredes D, Watson CJE, Rega F, Jochmans I. A systematic review and meta-analyses of regional perfusion in donation after circulatory death solid organ transplantation. Transpl Int 2021; 34:2046-2060. [PMID: 34570380 DOI: 10.1111/tri.14121] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 09/16/2021] [Accepted: 09/20/2021] [Indexed: 12/29/2022]
Abstract
In donation after circulatory death (DCD), (thoraco)abdominal regional perfusion (RP) restores circulation to a region of the body following death declaration. We systematically reviewed outcomes of solid organ transplantation after RP by searching PubMed, Embase, and Cochrane libraries. Eighty-eight articles reporting on outcomes of liver, kidney, pancreas, heart, and lung transplants or donor/organ utilization were identified. Meta-analyses were conducted when possible. Methodological quality was assessed using National Institutes of Health (NIH)-scoring tools. Case reports (13/88), case series (44/88), retrospective cohort studies (35/88), retrospective matched cohort studies (5/88), and case-control studies (2/88) were identified, with overall fair quality. As blood viscosity and rheology change below 20 °C, studies were grouped as hypothermic (HRP, ≤20 °C) or normothermic (NRP, >20 °C) regional perfusion. Data demonstrate that RP is a safe alternative to in situ cold preservation (ISP) in uncontrolled and controlled DCDs. The scarce HRP data are from before 2005. NRP appears to reduce post-transplant complications, especially biliary complications in controlled DCD livers, compared with ISP. Comparisons for kidney and pancreas with ISP are needed but there is no evidence that NRP is detrimental. Additional data on NRP in thoracic organs are needed. Whether RP increases donor or organ utilization needs further research.
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Jochmans I, Hessheimer AJ, Neyrinck AP, Paredes D, Bellini MI, Dark JH, Kimenai HJAN, Pengel LHM, Watson CJE. Consensus statement on normothermic regional perfusion in donation after circulatory death: report from the European Society for Organ Transplantation's Transplant Learning Journey. Transpl Int 2021; 34:2019-2030. [PMID: 34145644 DOI: 10.1111/tri.13951] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 06/08/2021] [Accepted: 06/09/2021] [Indexed: 11/27/2022]
Abstract
Normothermic regional perfusion (NRP) in donation after circulatory death (DCD) is a safe alternative to in situ cooling and rapid procurement. An increasing number of countries and centres are performing NRP, a technically and logistically challenging procedure. This consensus document provides evidence-based recommendations on the use of NRP in uncontrolled and controlled DCDs. It also offers minimal ethical, logistical and technical requirements that form the foundation of a safe and effective NRP programme. The present article is based on evidence and opinions formulated by a panel of European experts of Workstream 04 of the Transplantation Learning Journey project, which is part of the European Society for Organ Transplantation.
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Hardman G, Sutcliffe R, Hogg R, Mumford L, Grocott L, Jerrett L, Mead-Regan SJ, Nuttall J, Dunn S, Seeley P, Quigley R, Dalzell JR, Al-Attar N, Parameshwar J, Fisher AJ, Booth K, Dark JH. Heart transplantation in the UK during the first wave of the SARS-CoV-2 pandemic. Clin Transplant 2021; 35:e14261. [PMID: 33608916 PMCID: PMC7995148 DOI: 10.1111/ctr.14261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 02/03/2021] [Accepted: 02/15/2021] [Indexed: 01/11/2023]
Abstract
BACKGROUND We aim to evaluate practice and understand the impact of the first wave of the SARS-CoV-2 pandemic on heart transplantation in the UK. METHODS A retrospective review of the UK Transplant Registry (UKTR) and a national survey of UK heart transplant centers have been performed. The early pandemic period is defined here as 1 March to 31 May 2020. RESULTS There was geographic variation in the prevalence of COVID-19 across the UK. All centers reported adaptations to maintain the safety of their staff, candidate, and recipient populations. The number of donors fell by 31% during the early pandemic period. Heart utilization increased to 35%, compared to 26% during the same period of 2019. The number of heart transplants was well maintained, across all centers, with 38 performed, compared to 41 during the same period of 2019, with no change in 30-day survival. Twenty-seven heart transplant recipients with confirmed COVID-19 infection were reported during the study period. CONCLUSION All UK heart transplant centers have successfully adapted their programs to overcome the challenges of staff redeployment and ICU and hospital resource limitation, associated with the pandemic, whilst continuing heart transplant activity. On-going evaluation of practice changes, with sharing of lessons learned, is required as the pandemic continues.
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Hardman G, Sutcliffe R, Hogg R, Mumford L, Grocott L, Mead-Regan SJ, Nuttall J, Dunn S, Seeley P, Clark S, Quigley R, Al-Attar N, Booth K, Dark JH, Fisher AJ. The impact of the SARS-CoV-2 pandemic and COVID-19 on lung transplantation in the UK: Lessons learned from the first wave. Clin Transplant 2021; 35:e14210. [PMID: 33368697 PMCID: PMC7883175 DOI: 10.1111/ctr.14210] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 12/18/2020] [Accepted: 12/21/2020] [Indexed: 12/13/2022]
Abstract
Background Lung transplantation is particularly susceptible to the impact of the severe acute respiratory syndrome coronavirus‐2 (SARS‐CoV‐2) pandemic, and evaluation of changes to practice is required to inform future decision‐making. Methods A retrospective review of the UK Transplant Registry (UKTR) and national survey of UK lung transplant centers has been performed. Results There was geographic variation in the prevalence of COVID‐19 infection across the UK. The number of donors fell by 48% during the early pandemic period. Lung utilization fell to 10% (compared with 24% for the same period of 2019). The number of lung transplants performed fell by 77% from 53, March to May 2019, to 12. Seven (58%) of these were performed in a single‐center, designated “COVID‐light.” The number of patients who died on the lung transplant waiting list increased, compared to the same period of 2019 (p = .0118). Twenty‐six lung transplant recipients with confirmed COVID‐19 infection were reported during the study period. Conclusion As the pandemic continues, reviewing practice and implementing the lessons learned during this period, including the use of robust donor testing strategies and the provision of “COVID‐light” hospitals, are vital in ensuring the safe continuation of our lung transplant program.
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Dark JH, Mehew J, Venkateswaran R. Prolongation of time from brain death to retrieval is beneficial to the donor heart. J Thorac Cardiovasc Surg 2020; 161:e311-e312. [PMID: 33218762 DOI: 10.1016/j.jtcvs.2020.06.127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 06/21/2020] [Accepted: 06/23/2020] [Indexed: 01/19/2023]
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Wang L, MacGowan GA, Ali S, Dark JH. Ex situ heart perfusion: The past, the present, and the future. J Heart Lung Transplant 2020; 40:69-86. [PMID: 33162304 DOI: 10.1016/j.healun.2020.10.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 09/30/2020] [Accepted: 10/08/2020] [Indexed: 01/06/2023] Open
Abstract
Despite the advancements in medical treatment, mechanical support, and stem cell therapy, heart transplantation remains the most effective treatment for selected patients with advanced heart failure. However, with an increase in heart failure prevalence worldwide, the gap between donor hearts and patients on the transplant waiting list keeps widening. Ex situ machine perfusion has played a key role in augmenting heart transplant activities in recent years by enabling the usage of donation after circulatory death hearts, allowing longer interval between procurement and implantation, and permitting the safe use of some extended-criteria donation after brainstem death hearts. This exciting field is at a hinge point, with 1 commercially available heart perfusion machine, which has been used in hundreds of heart transplantations, and a number of devices being tested in the pre-clinical and Phase 1 clinical trial stage. However, no consensus has been reached over the optimal preservation temperature, perfusate composition, and perfusion parameters. In addition, there is a lack of objective measurement for allograft quality and viability. This review aims to comprehensively summarize the lessons about ex situ heart perfusion as a platform to preserve, assess, and repair donor hearts, which we have learned from the pre-clinical studies and clinical applications, and explore its exciting potential of revolutionizing heart transplantation.
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Wang L, Thompson E, Bates L, Pither TL, Hosgood SA, Nicholson ML, Watson CJ, Wilson C, Fisher AJ, Ali S, Dark JH. Flavin Mononucleotide as a Biomarker of Organ Quality-A Pilot Study. Transplant Direct 2020; 6:e600. [PMID: 32904032 PMCID: PMC7447496 DOI: 10.1097/txd.0000000000001046] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 07/09/2020] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Flavin mononucleotide (FMN), released from damaged mitochondrial complex I during hypothermic liver perfusion, has been shown to be predictive of 90-day graft loss. Normothermic machine perfusion (NMP) and normothermic regional perfusion (NRP) are used for organ reconditioning and quality assessment before transplantation. This pilot study aimed to investigate the changes of FMN levels during normothermic reperfusion of kidneys, livers, and lungs and examine whether FMN could serve as a biomarker to predict posttransplant allograft quality. METHODS FMN concentrations, in perfusates collected during NMP of kidneys, abdominal NRP, and ex vivo lung perfusion, were measured using fluorescence spectrometry and correlated to the available perfusion parameters and clinical outcomes. RESULTS Among 7 transplanted kidneys out of the 11 kidneys that underwent NMP, FMN levels at 60 minutes of NMP were significantly higher in the allografts that developed delayed graft function and primary nonfunction (P = 0.02). Fifteen livers from 23 circulatory death donors that underwent NRP were deemed suitable for transplantation. Their FMN levels at 30 minutes of NRP were significantly lower than those not procured for transplantation (P = 0.004). In contrast, little FMN was released during the 8 lung perfusions. CONCLUSIONS This proof of concept study suggested that FMN in the perfusates of kidney NMP has the potential to predict posttransplant renal function, whereas FMN at 30 minutes of NRP predicts whether a liver would be accepted for transplantation. More work is required to validate the role of FMN as a putative biomarker to facilitate safe and reliable decision-making before embarking on transplantation.
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Wang L, Wang T, Rushton SN, Parry G, Dark JH, Sheerin NS. The impact of severe acute kidney injury requiring renal replacement therapy on survival and renal function of heart transplant recipients - a UK cohort study. Transpl Int 2020; 33:1650-1666. [PMID: 32542834 DOI: 10.1111/tri.13675] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 01/30/2020] [Accepted: 06/09/2020] [Indexed: 01/06/2023]
Abstract
Severe acute kidney injury (AKI), defined as requiring renal replacement therapy (RRT), is associated with higher mortality postheart transplantation, but its long-term renal consequences are not known. Anonymized data of 3365 patients, who underwent heart transplantation between 1995 and 2017, were retrieved from the UK Transplant Registry. Multivariable binary logistic regression was performed to identify risk factors for severe AKI requiring RRT, Kaplan-Meier analysis to compare survival and renal function deterioration of the RRT and non-RRT groups, and multivariable Cox regression model to identify predicting factors of mortality and end-stage renal disease (ESRD). 26.0% of heart recipients received RRT post-transplant. The RRT group has lower survival rates at all time points, especially in the immediate post-transplant period. However, conditional on 3 months survival, older age, diabetes and coronary heart disease, but not post-transplant RRT, were the risk factors for long-term survival. The predicting factors for ESRD were insulin-dependent diabetes, renal function at transplantation, eGFR decline in the first 3 months post-transplant, post-transplant severe AKI and transplantation era. Severe AKI requiring RRT post-transplant is associated with worse short-term survival, but has no impact on long-term mortality. It also accelerates recipients' renal function deterioration in the long term.
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Hardman G, Dark JH. Commentary: The end of the beginning? J Thorac Cardiovasc Surg 2020; 162:1489-1490. [PMID: 32164948 DOI: 10.1016/j.jtcvs.2020.02.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 02/10/2020] [Accepted: 02/11/2020] [Indexed: 11/20/2022]
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Booth K, Dark JH. Reply: Commentary on do not forget late aneurysm after heart transplantation: More evidence for computed tomography screening. J Thorac Cardiovasc Surg 2019; 159:e128. [PMID: 31562009 DOI: 10.1016/j.jtcvs.2019.07.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 07/25/2019] [Indexed: 11/24/2022]
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Khushnood A, Butt TA, Jungschleger J, Henderson P, Smith JH, De Rita F, Nassar M, Page A, Messer S, Large S, Dark JH, Parry G, Reinhardt Z, Hasan A. Paediatric donation after circulatory determined death heart transplantation using donor normothermic regional perfusion and ex situ heart perfusion: A case report. Pediatr Transplant 2019; 23:e13536. [PMID: 31273913 DOI: 10.1111/petr.13536] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 06/02/2019] [Accepted: 06/06/2019] [Indexed: 12/15/2022]
Abstract
This is a report of a unique DCD paediatric heart transplant whereby normothermic regional perfusion was used to assess DCD heart function after death followed by ex situ heart perfusion of the graft during transportation from donor to recipient hospitals. The DCD donor was a 9-year-old boy weighing 84 kg. The recipient was 7-year-old boy with failing Fontan circulation and weighed 23 kg. It was an ABO-compatible heart transplantation. The DCD heart was reperfused and assessed using normothermic regional perfusion followed by portable ex situ heart perfusion during transportation. The orthotopic heart transplantation was successful with good graft function and no evidence of rejection on endomyocardial biopsy at 30 days post-transplant. At 1-year follow-up, excellent graft function is maintained, and he is attending school with a good quality of life. DCD heart transplantation in children is a promising solution to reducing paediatric waiting times. The case demonstrates the feasibility of using normothermic regional perfusion in the donor and ex situ heart perfusion during graft transportation. This combination allowed a functional assessment whilst minimizing warm ischaemia resulting in a successful outcome. More research and long-term follow-up are needed in order to benefit from the huge potential that paediatric DCD heart transplantation has to offer.
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MacGowan GA, Dark JH, Corris PA, Nair AR. Effects of drug abuse, smoking and alcohol on donor hearts and lungs. Transpl Int 2019; 32:1019-1027. [PMID: 31172575 DOI: 10.1111/tri.13468] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/04/2019] [Accepted: 05/31/2019] [Indexed: 12/16/2022]
Abstract
Potential heart and lung donors with a history of illicit drugs and/or smoking and alcohol are frequently offered, though there is no clear guidance on when it is safe to use these organs. A review of the literature on effects of drugs, alcohol and smoking on donor outcomes, and the effects of these on the intact heart and lung was undertaken. There has been a marked increase in deaths from opioid abuse in many developed countries, though recent evidence suggests that outcomes after cardiothoracic transplantation are equivalent to nonopioid donor causes of death. For donor smoking, there is an increased risk with lung transplantation; however, that risk is less when compared to further waiting on the transplant list for a nonsmoking alternative. Heavy alcohol consumption does not adversely affect heart transplantation, and there is no clear evidence of adverse outcomes after lung transplantation. There are no overall effects of cannabis or cocaine on survival after heart or lung transplantation. In all these cases, careful donor assessment can establish if a particular organ can be used. In most cases, use of drugs requires careful assessment, but is not in of itself a contraindication to cardiothoracic transplantation.
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Booth K, Dark JH. Commentary: Pseudoaneurysm aortopathy after heart transplantation-A link too far? J Thorac Cardiovasc Surg 2019; 158:e187-e188. [PMID: 31029450 DOI: 10.1016/j.jtcvs.2019.03.041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Accepted: 03/11/2019] [Indexed: 11/15/2022]
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Dark JH. Pathophysiology and Predictors of Bronchial Complications After Lung Transplantation. Thorac Surg Clin 2018; 28:357-363. [PMID: 30054073 DOI: 10.1016/j.thorsurg.2018.04.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Bronchial anastomotic breakdown was a major complication in the early days of lung transplantation. Their solution, achieved through an understanding of airway ischemia from the laboratory, was key to the initial clinical success. Subsequently, risk factors, such as prolonged ventilation in both donor and recipient, primary graft dysfunction, and recipient age, have emerged. Innovations, such as local tissue wrapping, telescoping the anastomosis, and bronchial artery revascularization, have not stood the test of time. The short donor bronchus, with a suture line at the level of the lobar bronchus carina, is a proven technique that should be adopted by surgeons.
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Dark JH. Interleukin-10 transfection and the donor lung—A still-evolving story. J Thorac Cardiovasc Surg 2018; 156:1303-1304. [DOI: 10.1016/j.jtcvs.2018.06.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 06/05/2018] [Accepted: 06/05/2018] [Indexed: 10/28/2022]
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Birch J, Sunny SS, Hester KLM, Parry G, Kate Gould F, Dark JH, Clark SC, Meachery G, Lordan J, Fisher AJ, Corris PA, De Soyza A. Outcomes of lung transplantation in adults with bronchiectasis. BMC Pulm Med 2018; 18:82. [PMID: 29789006 PMCID: PMC5964693 DOI: 10.1186/s12890-018-0634-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 04/25/2018] [Indexed: 11/17/2022] Open
Abstract
Background Lung transplantation is a well-established treatment for end-stage non-cystic fibrosis bronchiectasis (BR), though information regarding outcomes of transplantation remains limited. Our results of lung transplantation for Br are reported here. Methods A retrospective review of case notes and transplantation databases was conducted for patients that had underwent lung transplantation for bronchiectasis at the Freeman Hospital between 1990 and 2013. Results Fourty two BR patients underwent lung transplantation, the majority (39) having bilateral sequential lung transplantation. Mean age at transplantation was 47.1 years. Pre-transplantation osteoporosis was a significant non-pulmonary morbidity (48%). Polymicrobial infection was common, with Pseudomonas aeruginosa infection frequently but not universally observed (67%). Forced expiratory volume in 1 second (% predicted) improved from a pre-transplantation mean of 0.71 L (22% predicted) to 2.56 L (79 % predicted) at 1-year post-transplantation. Our survival results were 74% at 1 year, 64% at 3 years, 61% at 5 years and 48% at 10 years. Sepsis was a common cause of early post-transplantation deaths. Conclusions Lung transplantation for end-stage BR is a useful therapeutic option, with good survival and lung function outcomes. Survival values were similar to other bilateral lung transplants at our centre. Pre-transplantation Pseudomonas infection is common.
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Dark JH, Hasan A. Back to the future. Ann Cardiothorac Surg 2018; 7:2. [PMID: 29492378 DOI: 10.21037/acs.2018.01.02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Jungschleger JGM, Boldyrev SY, Kaleda VI, Dark JH. Standard orthotopic heart transplantation. Ann Cardiothorac Surg 2018; 7:169-171. [PMID: 29492395 DOI: 10.21037/acs.2018.01.18] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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25
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Dark JH. "Ex" becomes "in": A new direction for ex vivo lung perfusion? J Thorac Cardiovasc Surg 2017; 155:438-439. [PMID: 29089091 DOI: 10.1016/j.jtcvs.2017.09.101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 09/22/2017] [Indexed: 10/18/2022]
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