Background: Use of lungs donated after circulatory death (DCD) has expanded, but changes in donor/recipient characteristics and comparison to brain dead donors (DBD) has not been studied. We examined the evolution of the use of DCD lungs for transplantation and compare outcomes to DBD lungs.Methods: The SRTR database was used to construct three 5-year intervals. Perioperative variables and survival were compared by era and for DCD vs. DBD. Geographic variation was estimated using recipient permanent address.Results: 728 DCD and 27,205 DBD lung transplants were identified. DCD volume increased from Era 1 (n = 73) to Era 3 (n = 528), representing 1.1% and 4.2% of lung transplants. Proportionally more DCD recipients were in ICU or on ECMO pre-transplant, and had shorter waitlist times. DCD donors were older, had lower PaO2/FiO2 ratios compared to DBD, more likely to be bilateral, had longer ischemic time, length of stay, post-op dialysis, and increased use of lung perfusion. There was no difference in overall survival. Geographically, use was heterogeneous.Conclusion: DCD utilization is low but increasing. Despite increasing ischemic time and transplantation into sicker patients, survival is similar, which supports further DCD use in lung transplantation. DCD lung transplantation presents an opportunity to continue to expand the donor pool.
The emergence of the novel coronavirus, SARS-CoV-2, and its associated clinical syndrome, COVID-19, resulted in the largest global pandemic since the 1918 influenza. While widespread in the general population, to date, there are few reports of COVID-19 in solid organ transplant (SOT) recipients. 1-5 Herein, we report a case of COVID-19 infection in the early postoperative period following lung transplantation (LT). A 68 year-old white female with idiopathic pulmonary fibrosis, gastroesophageal reflux disease, hyperlipidemia, and psoriasis was listed for bilateral LT with a lung allocation score of 31.8784. At admission for transplant, the patient reported feeling well without symptoms of acute respiratory infection. Vital signs included temperature, 37.1°C; heart rate, 78 beats per minute; blood pressure, 124/83 mm Hg; and oxygen saturation, 94% on 3 L/min oxygen. The donor, a 30 year-old female with a history of hypertension and inflammatory bowel disease treated with a tumor necrosis factor inhibitor presented to the hospital with severe headache, confusion, and vomiting. There was no history of fever or respiratory symptoms. She was intubated, and head CT revealed a large intracerebral hemorrhage. Due to poor neurologic prognosis, her family elected to pursue organ donation following cardiac death. Chest CT demonstrated "focal areas of consolidation in the bilateral dependent lower lobes with adjacent tree-in-bud opacities most consistent with pneumonia, possibly secondary to aspiration" (Figure 1A). Bronchoscopic examination identified erythematous mucosa of the trachea and main carina with purulent secretions in all lobes. Bronchoalveolar lavage (BAL) culture resulted in normal upper respiratory flora. No viral testing was performed, and no confirmed COVID-19 cases had been reported in the county of the donor hospital. p a O 2 on the last challenge arterial blood gas prior to procurement was 482 mm Hg.
Purpose of review: Primary graft dysfunction is an acute lung injury syndrome occurring immediately following lung transplantation. This review aims to provide an overview of the current understanding of PGD, including epidemiology, immunology, clinical outcomes and management. Recent findings: Identification of donor and recipient factors allowing accurate prediction of PGD has been actively pursued. Improved understanding of the immunology underlying PGD has spurred interest in identifying relevant biomarkers. Work in PGD prediction, severity stratification and targeted therapies continue to make progress. Donor expansion strategies continue to be pursued with ex vivo lung perfusion playing a prominent role. While care of PGD remains supportive, ECMO has established a prominent role in the early aggressive management of severe PGD. Summary: A consensus definition of PGD has allowed marked advances in research and clinical care of affected patients. Future research will lead to reliable predictive tools, and targeted therapeutics of this important syndrome.
Background. Lung transplant patients are vulnerable to various forms of allograft injury, whether from acute rejection (AR) (encompassing acute cellular rejection [ACR] and antibody-mediated rejection [AMR]), chronic lung allograft dysfunction (CLAD), or infection (INFXN). Previous research indicates that donor-derived cell-free DNA (dd-cfDNA) is a promising noninvasive biomarker for the detection of AR and allograft injury. Our aim was to validate a clinical plasma dd-cfDNA assay for detection of AR and other allograft injury and to confirm and expand on dd-cfDNA and allograft injury associations observed in previous studies. Methods. We measured dd-cfDNA fraction using a novel single-nucleotide polymorphism-based assay in prospectively collected plasma samples paired with clinical-pathologic diagnoses. dd-cfDNA fraction was compared across clinical-pathologic cohorts: stable, ACR, AMR, isolated lymphocytic bronchiolitis, CLAD/neutrophilic-responsive allograft dysfunction (NRAD), and INFXN. Performance characteristics were calculated for AR and combined allograft injury (AR + CLAD/NRAD + INFXN) versus the stable cohort. Results. The study included 195 samples from 103 patients. Median dd-cfDNA fraction was significantly higher for ACR (1.43%, interquartile range [IQR]: 0.67%–2.32%, P = 5 × 10 −6 ), AMR (2.50%, IQR: 2.06%–3.79%, P = 2 × 10 −5 ), INFXN (0.74%, IQR: 0.46%–1.38%, P = 0.02), and CLAD/NRAD (1.60%, IQR: 0.57%–2.60%, P = 1.4 × 10 −4 ) versus the stable cohort. Area under the receiver operator characteristic curve for AR versus stable was 0.91 (95% confidence interval [CI]: 0.83-0.98). Using a ≥1% dd-cfDNA fraction threshold, sensitivity for AR was 89.1% (95% CI: 76.2%-100.0%), specificity 82.9% (95% CI: 73.3%-92.4%), positive predictive value, 51.9% (95% CI: 37.5%-66.3%), and negative predictive value, 97.3% (95% CI: 94.3%-100%). For combined allograft injury area under the receiver operator characteristic curve was 0.76 (95% CI: 0.66-0.85), sensitivity 59.9% (95% CI: 46.0%-73.9%), specificity 83.9% (95% CI: 74.1%-93.7%), positive predictive value, 43.6% (95% CI: 27.6%-59.6%), and negative predictive value, 91.0% (95% CI: 87.9%-94.0%). Conclusions. These results indicate that our dd-cfDNA assay detects AR and other allograft injury. dd-cfDNA monitoring, accompanied by standard clinical assessments, represents a valuable precision tool to support lung transplant health and is appropriate for further assessment in a prospective randomized-controlled study.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.