Active clinical trials for "Acute Lung Injury"

The aim of the investigators 'study is to investigate the relationship between the biomarkers (e.g. protein markers, genetic polymorphisms and epigenetic markers) and the onset of ARDS. In this study, the participants were divided into case group (with ARDS) and control group (without ARDS), based on a nested case-control study method. During the diagnosis and treatment, the clinical data of subjects are collected at the given time point. And the clinical data are extracted from plasma, blood and bronchoalveolar lavage fluid of participants. These data will be analyzed based on statistical methods. In the end ,the investigators can build a multi index early warning model based on the biomarkers,which is meaningful for the early diagnosis of the patient with high-risk for ARDS and provide evidence for the early treatment.

The study enrolls ARDS patients in medical ICUs in 11 Hospitals in Taiwan. The epidemiology and long-term outcomes of the patients will be recorded.

The investigators decided to conduct a longitudinal study that compares the pulmonary tomographic patterns found in patients with viral pneumonia (i.e. influenza H1N1 and SARS-CoV-2) at a regional hospital. The primary aim of this study is to evaluate the association between the radiological CT pattern and the need for invasive mechanical ventilation. A secondary aim is to assess the mortality within the first 28 days of intensive care unit admission.

This study is meant to assess the lung mechanics in SARS-CoV-2 induced acute respiratory failure. A precise characterisation of lung mechanics and heart-lung-interactions might allow a better understanding of SARS-CoV-2 induced acute respiratory failure and thus lead to better mechanical ventilation strategies. This monocentric, observational study of critically ill COVID-19 patients in the ICU, will employ impedance tomography, right-heart catheterization, oesophageal pressure measurements, indirect calorimetry as well as classic mechanical ventilation parameters to characterise the mechanical characteristics of the lung as well as the heart-lung interactions in SARS-CoV-2 induced acute respiratory failure.

Patients older than 18 years of age, with COVID-19 related ARDS (C-ARDS) hospitalized in the ICU and invasively mechanically ventilated will be included in the study. This is an observational cohort study. After informed consent by the next of kin, and within the first 72 hours of invasive mechanical ventilation a blood and a Broncho Alveolar Lavage Fluid (BALF) sample will be collected. If the patients remain invasively mechanically ventilated a second and third blood and BALF sample will be collected every 7-10 days.

Sepsis is a dysregulated host response to severe life-threatening infections, leading to organ failure and death in up to 40% of patients with septic shock. Pulmonary infections are the main cause of community-acquired sepsis and frequently lead to the development of acute respiratory distress syndrome(ARDS). Features of immunosuppression, including diminished cell surface monocyte human leukocyte antigen DR (mHLA-DR) expression, are strongly associated with hospital mortality. Such decrease in HLA-DR expression on antigen-presenting cells has been associated with impairment of microbial antigens to Tcells. Septic patients also show elevated expression of inhibitory receptors associated with cell exhaustion.. Yet, biochemical, flow cytometric and immunohistochemical findings consistent with immunosuppression have been observed in lungs and spleen of patients died of sepsis and multiple organ failure, demonstrating the relevance of studying these defects directly in organ tissues. A novel approach aimed to characterize the role and prognostic value of alveolar biomarkers measured directly in the injured lungs is warranted and supported by: -disappointing results of previous clinical trials attempting to restore the level of biomarkers measured on circulating cells; -evidences of regional immunosuppression in lungs of ARDS patients; -lung is the main site of hospital-acquired infections with a prevalence of ventilator-associated pneumonia in 30% over the course of Intensive Care Unit(ICU) stay in ARDS patients. Investigators speculate that biomarkers measured on alveolar leukocytes (AL) surface, are important predictors of outcome and potential therapeutic targets in ICU patients with pneumonia-associated ARDS. Investigators aim to explore whether biomarkers measured directly on AL from patients with pneumonia-associated ARDS are associated to regional pulmonary immunosuppression using leukocyte functional tests; and predictors of outcomes. Bronchoalveolar lavage fluid(BALF) and blood samples will be collected in ARDS patients. Leukocyte populations and cell membrane biomarkers will be quantified using flow cytometry. Leukocyte functional tests will be performed ex vivo on leukocytes collected from BALF and blood samples. Pharmacological interventions will be performed ex vivo. This project aims to identify biomarkers associated with outcomes and potential therapeutic targets.

With the perception that lung protective ventilation with regard to low tidal volume ventilation and limiting airway pressures improves outcome in ARDS (acute respiratory distress syndrome) and that the development of new technical devices of extracorporeal lung assist systems with lower complication rates support establishment of lung protective ventilation strategies these systems are more and more frequently used. All critically ill patients with and without ECLA (extracorporeal lung assist)/ECMO (extracorporeal membrane oxygenation) treatment are on high risk for muscle wasting, leading to more comorbidity and higher mortality risk. Besides inflammation malnutrition is known as one of the main risk factors. Over and underfeeding should be prevented. However nutritional aspects of patients on extracorporeal lung assist are hardly investigated. Up to now changes in metabolic rates induced by ECLA/ECMO are poorly described. Factors like work of breathing, changes in cardiac output and septic state are influencing energy metabolism but until now there is no tool for measuring energy expenditure in clinical routine for patients on ECLA/ECMO. Indirect calorimetry is a simple device only for patients without ECLA/ECMO system. Oxygenation and CO2 (carbon dioxide) elimination by the lung assist system can be calculated but is not implemented to clinical routine. The combination of indirect calorimetry and calculation of lung assist function at the same time would give us the chance to adapt nutrition rates to energy expenditure. This may prevent muscle wasting and weakness. This pilot study will include 40 participating patients during 8 month investigating nutritional therapy adapted to energy expenditure calculated by O2 and CO2 turnover rates in patients on ECLA or ECMO systems. The investigators aim is to describe a calculation to set nutrition targets in ECMO patients. Second the investigators will describe level of nutritional needs under consideration of different mechanical ventilation states. Third O2 consumption and CO2 elimination will be used to estimate cardiac output.

In this study the investigators aim to compare two common methods to estimate the lung recruitment in ALI/ARDS patients.

The goal of this project is to find a series novel biomarkers by differential proteomic techniques that can improve the early diagnosis and develop a more efficient therapy to enhance ARDS patient survival rate.

This registry was proposed to investigate the epidemiology of respiratory mechanics in patients with ARDS through collecting data from a QI project which was constituted with systematic assessments of respiratory mechanics and gas exchange.