Active clinical trials for "Respiratory Tract (Lung and Bronchial) Diseases"

Analysing ths spread of COVID-19 epidemics in a timely manner is key to implementing public health control strategies. The investigators propose to analyse a large set of laboratory SARS-CoV-2 RT-PCR data to explore potential links between Ct values and epidemic parameters.

Recently published studies could demonstrate that detection of specific biomarkers in breath could be applied for the diagnosis of SARS-CoV-2.

In this prospective longitudinal cohort the investigators reported the clinical, and biological characteristics of all critically ill patients admitted in the pediatric intensive care unit (PICU) of Bicêtre Hospital during the 2019 coronavirus disease (COVID-19) pandemics. Patients were older than 37 weeks of gestational age. No upper limit was set as the unit was transiently converted into a pediatric "adult COVID-19" intensive care unit.

The aim of this study is to evaluate the prevalence of COVID-19 among the workers of our hospital and the factors that are likely to influence this prevalence. It must be underlined that our hospital is settled in two towns and both hospital sites had different missions regarding the admissions of COVID-19-infected patients.

Infection with covid-19 is associated with respiratory failure, which when related to other etiologies can lead to reduced quality of life, physical, cognitive and mental dysfunction. There is no knowledge of the possible consequences of severe covid-19 infection. Our objective is to describe these repercussions, identifying risk factors and assessing the impact of physical training. At least 100 patients over 18 years of age who survive severe Covid-19 infection will be evaluated. Assessments after 1, 4, 6 and 12 months after hospital discharge. Quality of life, dyspnea, activity of daily living, muscle strength, mental and cognitive dysfunction will be evaluated, as well as pulmonary function test, cardiopulmonary stress test and chest tomography. Return to work, thromboembolic events and mortality up to 12 months will also be monitored. Hospitalization data will be used to identify factors related to quality of life, fatigue and respiratory dysfunction. Predefined risk factors will be evaluated: age, sex, smoking, previous comorbidities index, previous clinical frailty, serum C-reactive protein and leukocyte / lymphocyte ratio in the first 24 hours of hospitalization, time between onset of symptoms and hospitalization, ICU and mechanical ventilation, time on mechanical ventilation, compliance corrected by the ideal weight at the start of mechanical ventilation, driving pressure, tidal volume corrected by the ideal weight and PEEP (positive end expiratory pressure) after 24 hours of intubation in controlled ventilation, tidal volume corrected by the ideal weight after 24 hours of spontaneous ventilation, inspiratory muscle training and pulmonary rehabilitation after hospital discharge.

A new strain of coronavirus that caused severe respiratory disease in infected individuals was initially identified in China's Wuhan City in December 2019. Severe acute respiratory distress syndrome coronavirus-2 (SARS-CoV-2), which was responsible for the corona virus infectious disease-2019 (COVID-19).The World Health Organization declared that COVID-19 was a Public Health Emergency of International Concern on January 30,2020. The impact of COVID-19 in liver recipients remains largely unknown but accumulating experience is going on. Liver transplant recipients should have been classified as a risk group and should have received regular surveillance for COVID-19 throughout the pandemic. Some reports suggest decreasing immunosuppression for infected recipients, if no recent rejection episodes. Paradoxically, others suggest that a reactive immune response might be the cause for severe tissue damage, and that immunosuppression might be protective from the postulated cytokine storm. Some studies stated that the LT patients who are permanently on immunosuppressants could be particularly susceptible to SARS-CoV-2, and their prognosis could be worse in comparison to the normal population. They recommended that LT recipients should be closely monitored for SARS-CoV-2. The LT society of India (LTSI) highlighted the potential of LT recipients as asymptomatic carriers and source of viral spread, and that SARS-CoV-2 can be transmitted to LT recipients. There are insufficient data on the relationship between immunosuppressive therapy and COVID-19 in LT recipients during this pandemic. However, the Beijing working party for liver transplantation suggested that LT recipients who were infected with SARS-CoV-2 should be treated with steroids for a short period to reduce the severity of pneumonia. They also suggested that immunosuppressive therapies should be continued for both patients with mild COVID-19 and those who were not infected by the virus, and calcineurin inhibitor treatment dosage should be reduced in moderate to severe cases. Neutralizing antibodies (NAbs) play an important role in virus clearance and have been considered as a key immune product for protection or treatment against viral diseases. Virus-specific NAbs, induced through either infection or vaccination, have the ability to block viral infection. SARS-CoV -2 specific NAbs reached their peak in patients from day 10-15 after the onset of the disease and remained stable thereafter in the patients. Antibodies targeting on different domains of S protein, including S1, RBD, and S2, may all contribute to the neutralization. Al-Rajhi Liver Center is the only liver transplantation center in Upper Egypt that performed only 51 living donor liver transplantation (LDLT) cases since 2014, but it was used as isolation Hospital for COVID-19 cases from March to July, 2020. Communication with liver transplant cases during that period was via Telemedicine. Resuming usual Hospital activity as Tertiary Liver Center occurred in 15 August 2020. Similarly, other Hospitals in Egypt were designated as COVID-19 isolation Hospitals.

The aim of this effort is to study host-pathogen interaction in Egyptian patients infected with COVID-19. The investigators will perform genome-wide miRNA and transcriptome screens in the infected patients along with healthy ones for comparison. All types of cytokines play pivotal roles in immunity, including the responses to different viral infections. Therefore, The investigators will study the cytokines profile in response to that infection. By comparing miRNA and transcriptome screens along with cytokines profiles, an important molecule might be identified that could play role in the inhibition of the COVID-19 outbreak. In addition, this information will help us gaining awareness of the immune process and knowing about the genes involved in the immune response against COVID-19 with an emphasis on the expression of cytokines.

This study examines the presence, severity and natural history of dysphagia and dysphonia in the post-extubation and severely unwell COVID-19 patient.

The charts of patients who developed pulmonary embolism in the course of COVID-19 will be evaluated, retrospectively. Clinical features and laboratory data will be analyzed.

Longitudinal prospective study in pregnant women withpositive serology or PCR for SARS-CoV-2 and indicationinvasive technique (amniocentesis or chorionic biopsy) that has the objective to evaluate the possible vertical transmission of SARS-CoV-2in the amniotic fluid or chorionic villi of pregnant women affected by coronavirus in the different periods of gestation.