Publications by authors named "Lucas Matos Fernandes"

Introduction: Alpha-1-antitrypsin deficiency (A1AD) is a genetically determined antiproteinase deficiency that predisposes to early-onset emphysema and liver disease. Lung transplantation (LTx) is the final therapeutic option. Behçet's disease (BD) is a rare autoimmune disease characterized by oral and genital ulcers and deep venous thrombosis associated with large-vessel and small-vessel vasculitis and aneurysms.

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Background: Tracheal diverticulum (TD) is a rare entity in clinical practice, accidentally found by imaging methods. It is a potential factor for the development of chronic respiratory infections, contributing to the progression of preexisting lung diseases and putting the success of lung transplantation at risk.

Objectives: This paper reports 2 cases of TD with atypical clinical presentation in post-lung transplant patients with recurrent infections and aims to present the importance of this differential diagnosis.

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Lobectomy for consolidation of failed endoscopic lung volume reduction for emphysema has been reported in selected patients with favorable results but with considerable morbidity. The challenging issues in such patients are frailty caused by severe emphysema itself, poor tolerance to single-lung ventilation, target lobe hyperinflation, and inability to use gas inflation for the minimally invasive resection. Careful planning, including use of a robotic platform and extracorporeal membrane oxygenation support, can circumvent such difficulties and ensure a safe, minimally invasive resection in the high-risk emphysematous patient.

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Background: Lung transplantation (LTx) has been discussed as an option for treating irreversible lung fibrosis post-coronavirus disease 2019 (COVID-19), in selected cases.

Objectives: To report on the initial experience and management of end-stage lung disease due to COVID-19 at a national center reference in Brazil.

Design And Setting: Cohort study conducted at a national reference center for lung transplantation.

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Objective: To report initial experience from the use of extracorporeal membrane oxygenation (ECMO) in patients who received lung transplantation.

Methods: Retrospective study of a single tertiary center in the Brazilian state of São Paulo, a national reference in lung transplantation, based on the prospective collection of data from electronic medical records. The period analyzed extended from January 2009 (beginning of the program) until December 2018.

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Kartagener syndrome (KS) is a rare congenital disorder related to bronchiectasis, chronic sinusitis, and situs inversus, predisposing patients to recurrent respiratory infections that can evolve to end-stage lung disease; lung transplantation (LTx) is one of the therapeutic options. This study highlights some concerns in this group of patients, mainly related to the difficulty of performing the transplantation in recipients with suppurative disease and situs inversus. We conducted a retrospective analysis of all KS patients who underwent LTx at 2 national reference centers by the same LTx team.

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Objective: To assess the feasibility and impact of ex vivo lung perfusion with hyperoncotic solution (Steen Solution™) in the utilization of these organs in Brazil.

Methods: In this prospective study, we subjected five lungs considered to be high risk for transplantation to 4 hours of ex vivo lung perfusion, with evaluation of oxygenation capacity. High-risk donor lungs were defined by specific criteria, including inflammatory infiltrates, pulmonary edema and partial pressure of arterial oxygen less than 300mmHg (inspired oxygen fraction of 100%).

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Objective: To evaluate the use of ex vivo lung perfusion (EVLP) clinically to prepare donor lungs for transplantation.

Methods: A prospective study involving EVLP for the reconditioning of extended-criteria donor lungs, the criteria for which include aspects such as a PaO2/FiO2 ratio < 300 mmHg. Between February of 2013 and February of 2014, the lungs of five donors were submitted to EVLP for up to 4 h each.

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Lung transplantation is a well-established treatment for patients with advanced lung disease. The evaluation of a candidate for transplantation is a complex task and involves a multidisciplinary team that follows the patient beyond the postoperative period. Currently, the mean time on the waiting list for lung transplantation in the state of São Paulo, Brazil, is approximately 18 months.

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Lung transplantation is a globally accepted treatment for some advanced lung diseases, giving the recipients longer survival and better quality of life. Since the first transplant successfully performed in 1983, more than 40 thousand transplants have been performed worldwide. Of these, about seven hundred were in Brazil.

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Purpose: To evaluate a new perfusate solution to be used for ex vivo lung perfusion.

Methods: Randomized experimental study using lungs from rejected brain-dead donors harvested and submitted to 1 hour of ex vivo lung perfusion (EVLP) using mainstream solution or the alternative.

Results: From 16 lungs blocs tested, we found no difference on weight after EVLP: Steen group (SG) = 1,097±526g; Alternative Perfusion Solution (APS) = 743±248g, p=0.

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Context And Objective: Lung preservation remains a challenging issue for lung transplantation groups. Along with the development of ex vivo lung perfusion, a new preservation method known as topical-ECMO (extracorporal membrane oxygenation) has been proposed. The present study compared topical-ECMO with cold ischemia (CI) for lung preservation in an ex vivo experimental model.

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Since they were first established, ex vivo models of lung reconditioning have been evaluated extensively. When rejected donor lungs are used, the great variability among the cases can hinder the progress of such studies. In order to avoid this problem, we developed a technique that consists of separating the lung block into right and left blocks and subsequently reconnecting those two blocks.

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