Active clinical trials for "Respiratory Distress Syndrome"

Acute respiratory distress syndrome accounts for 23% of mechanically ventilated patients and is associated with high mortality rate. Although life-saving, mechanical ventilation may worsen lung injury through two main mechanisms: lung overdistension and atelectrauma. Indeed, the cyclic opening and closure of airways during tidal ventilation may cause lung and bronchial injuries as suggested by animal models and autopsy findings. Complete airways closure has recently been described in 40% of patients with acute respiratory distress syndrome, and setting positive end-expiratory pressure above the airway opening pressure may limit atelectrauma. However, animal and mathematical models suggest that above the airway opening pressure, more distal airways open unevenly according to their own opening pressure, resulting in an "avalanche"-like phenomenon during lung inflation. This phenomenon has never been described in humans. A better understanding of the opening of airways in acute respiratory distress syndrome may help to limit ventilation-induced lung injury and to improve outcomes.

Acute Respiratory Distress Syndrome (ARDS) reflects the hallmark of the critical course of coronavirus (COVID19). The investigators have recently shown that Exhaled Breath Particles (EBP) measured as particle flow rate (PFR) from the airways could be used as a noninvasive real-time early detection method for primary graft dysfunction (which bears a pathophysiological resemblance to ARDS) in lung transplant patients. The investigators have also previously demonstrated the utility of PFR in early detection and monitoring of ARDS in a large animal model. PFR has been shown to be elevated prior to the cytokine storm which classically occurs in ARDS. Early detection of ALI and ARDS is intimately linked to a patient's chance of survival as early treatment consisting of the preparation for intensive care, prone positioning and protective mechanical ventilation can be implemented early in the process. In the present study the investigators aim to use real-time PFR as an early detector for COVID19-induced ARDS. The investigators will also collect EBPs onto a membrane for subsequent molecular analysis. Previous studies have shown that most of those proteins found in bronchoalveolar lavage (BAL) can also be detected in EBPs deposited on membranes. The investigators therefore also aim to be able to diagnose COVID19 by analyzing EBPs using Polymerase Chain Reaction (PCR) with the same specificity as PCR from BAL, with the added benefit of being able to identify protein biomarkers for early detection of ARDS.

The primary endpoint of this research is to establish that the alveolar dead space is significantly higher in patients with COVID-19 ARDS, compared to patients with non-COVID-19 ARDS. Secondarily, the investigators want to establish the prognostic value of the alveolar-dead space (measured iteratively) in patients with COVID-19 and non-COVID-19 ARDS, to establish the respective influences of the biological parameters of endothelial damage, of the biological parameters of coagulopathy, of the parameters set on the artificial ventilator on the value of the alveolar dead space; in ARDS patients with COVID-19 and non-COVID-19 ARDS, to establish the prognostic value of the laboratory parameters of endothelial damage and coagulopathy in patients with COVID-19 and non-COVID-19 ARDS.

T-Cell Mitochondrial Respiration Response to Ketone monoester (Ketoneaid) in Healthy Volunteers and COVID-19

Mortality rates in children with pediatric acute respiratory distress syndrome (PARDS) are higher in Asia compared to other regions. In adults with acute respiratory distress syndrome, the only therapy that improves mortality rates is a lung protective ventilation strategy. The pediatric ventilation recommendations are extrapolated from evidence in adults, including ventilation with low tidal volume, low peak/plateau pressures and high-end expiratory pressure. A recent retrospective study of ventilation practices in Asia showed varying practices with regards to pulmonary and non-pulmonary therapies, including ventilation. This study aims to determine the prevalence and outcomes of PARDS in the Pediatric Acute and Critical Care Medicine Asian Network (PACCMAN). This study will also determine the use of pulmonary (mechanical ventilation, steroids, neuromuscular blockade, surfactant, pulmonary vasodilators, prone positioning) and non-pulmonary (nutrition, sedation, fluid management, transfusion) PARDS therapies. To achieve this aim, a prospective observational study which involves systematic screening of all pediatric intensive care unit (PICU) admissions and collection of pertinent clinical data will be conducted. Recruitment will be consecutive and follow up will continue to intensive care discharge.

Introduction: Sepsis-induced acute respiratory distress syndrome(SI-ARDS) is a common complication of severe sepsis and is an independent contributor to poor prognosis of patients. It remains a clinical challenge to identify the SI-ARDS early and accurately, which could optimize the treatment strategy and reduce the mortality risk. Radiomics high-dimensional features extracted from CT images offer an insight into microvascular damage of SI-ARDS that are imperceptible to human eyes and aspects of intra-alveolar heterogeneity with potential prognostic relevance. Methods: Study design Investigators screened all patients with sepsis and septic shock who are treated in Sun Yat-sen Memorial Hospital, Sun Yat-sen University during the period from 1 May 2015 and 30 May 2022. Patients were recruited retrospectively from May 2015 to April 2021 as discovering group, and prospectively during the period from May 2021 to May 2022 as validation group. Follow-up will conducted until April 2023. Cohort descriptions and definitions Investigators plan to recruit 160 patients in discovering group, 40 patients in internal validation group, and 100 patients in external validation group. Patients between 18 and 80 years of age with sepsis and septic shock will be screened for eligibility. SI-ARDS is defined by sequential occurrence of the sepsis-3 consensus criteria for sepsis and the Berlin Definition for ARDS. The exclusion criteria are： admission stay <24hours, the presence of end-stage lung disease or long-term oxygen therapy, critically ill patients who have started mechanical ventilation caused by SI-ARDS before admission, a history of lung transplantation and chronic obstructive pulmonary disease, cancer patients not/have received chemotherapy. Outcome measures In this study, the primary outcome measure was the occurrence rates of acute respiratory distress syndrome(ARDS). It refers to the occurrence of sepsis patients progressed into ARDS. Secondary outcome measures were as follows: 1.28-day mortality 2.ventilator-free days 3.respiratory failure-free days Data collection All clinical data were collected by investigators and trained personnel. Each participant's data will be filled in electronic case report forms (CRF) and store online using REDCap (Research Electronic Data Capture). Discussion: SI-ARDS is one common severe complication with critically ill sepsis patients, which causes high mortality and poor prognosis. Early ARDS patient(arterial oxygen tension/inspired oxygen fraction [PaO2/FIO2] ≤ 300 mmHg but > 200 mmHg) may not require invasive mechanical ventilation, and is more readily reversible than acute respiratory distress syndrome(ARDS). In this ambispecive cohort study, investigators developed and validated novel nomograms incorporating the radiomics signature and clinical signature to provide an easy-to-use and individualized prediction of SI-ARDS occurrence and severe degree in patients with early stage.

Children supported by Extra-Corporeal Membrane Oxygenation (ECMO) present a high risk of neurological complications and cerebral autoregulation (CA) impairment may be a risk factor. The first objective is to investigate the association between CA impairments and neurological outcome assessed by the onset of an ANE. The secondary objective is to study the underlying mechanisms influencing CA.

Non-invasive respiratory support methods have been widely used in premature babies with respiratory distress syndrome (RDS) which has changed the basic management of premature babies in the early period. According to the 2019 European Guidelines on RDS management, early nasal CPAP is recommended as first-line therapy in infants <30 weeks of age who are at risk of RDS who do not require mechanical ventilation (MV). However, some of the premature babies have faced non-invasive ventilation failure. Remarkably, infants who experience non-invasive ventilation failure are at increased risk of death, pneumothorax, intraventricular hemorrhage, and bronchopulmonary dysplasia (BPD), among other morbidities. In non-invasive ventilation failure, although demographic factors such as small gestational age, low birth weight, and male gender play a role, it has been suggested that surfactant deficiency may also play an important role. The most frequently reported risk factor in predicting non-invasive failure in studies is the fraction of inspiring oxygen during the first hours of life. In addition, positive end-expiratory airway pressure (PEEP) required for patient stabilization was found to be a potential predictor. However, there are still limited data to predict non-invasive ventilation failure. "Which newborns are at high risk for non-invasive ventilation failure?" and "When should the surfactant be applied?". The study is a single-center, prospective study to evaluate prognostic factors, and most importantly to define the FiO2 threshold, which is an indicator of possible non-invasive ventilation failure in infants supported with nasal intermittent positive pressure ventilation.

The purpose of this study is to monitor short-term changes in tissue oxygen saturation and local blood flow as results of changing from supine to prone position in ARDS COVID-19 patients

Blood which recirculates through the circuit of a veno-venous Extracorporeal Membrane Oxygenation (V-V ECMO) does not contribute to the systemic oxygenation of a patient on V-V ECMO and is called the recirculation fraction (Rf). Theoretically, the optimization of ECMO blood flow is possible using Rf measurements. A prospective, observational study will be performed measuring the Rf of total ECMO blood flow in patients with acute respiratory distress syndrome (ARDS) on V-V ECMO with an ultrasound dilution technique. ECMO blood flow will be optimized by reducing ECMO blood flow in accordance with the measured Rf as long as systemic oxygenation is not compromised.