View clinical trials related to Bronchiolitis.
Filter by:The purpose of this study is to determine whether vitamin D supplements given to children aged 1 month to 5 years, hospitalized with acute lower respiratory tract infection will improve symptoms and reduce the duration of hospitalization.
The investigators hypothesize that Respiratory Syncytial Virus (RSV) infection may influence the population of lung immature myeloid cells and dendritic cells in a way that will impair their ability to invoke an effective immune response and lead to prolonged inflammation, angiogenesis and scarring. This may lead in turn to disturbed lung function. Our aim is to determine the presence and phenotype of immature myeloid cells present in respiratory secretions of children with RSV bronchiolitis as compared to non-RSV bronchiolitis and healthy controls.
Background: acute bronchiolitis (AB) is a common reason for hospitalization of infants in all population groups, and is usually due to respiratory syncytial virus (RSV) infection. The main cause for hospitalization is often a need for oxygen, but can also include high fever (with a suspected secondary bacterial infection) or increasing respiratory distress. In a minority of cases (some of which can be identified in advance by defining risk groups) a serious illness may develop, including risk of respiratory failure and death. Most cases will just require supplemental oxygen and suction of secretions from the nose (as listed in the recommendations of the American Academy of Pediatrics - AAP). However, this apparently "simple" treatment still requires continued hospitalization. This results in a sharp increase in bed occupancy in Israeli hospital pediatric departments in the winter months. In recent years two studies from developed countries have been published where safety has been demonstrated for home oxygen treatment for babies with AB. However, feasibility studies have not been published yet, for example for populations living in poor conditions. The General Health Services (Klalit) in Israel provides integrated hospital and community health service to the majority of the population living o in our region, thus presenting an opportunity for optimal interventions related to this disease.
Serum KL-6 protein has been described as a biomarker of epithelial lung injury in Respiratory Syncytial Virus bronchiolitis. The investigators can imagine that epithelial injury intensity has consequences on immediate and later respiratory prognosis. Furthermore, this prognosis seems to be different according to the respiratory causative virus. The investigators propose to study, during an epidemic season, the correlation between KL-6 levels and clinical severity, and the type of viral infection.
Phenotype characterization of shortness of breath of pediatric emergency room patients by objective wheeze and cough monitoring improves diagnostic and severity assessment accuracy and correlates with overall patient outcomes.
Bronchiolitis obliterable syndrome (BOS) is the most common cause of death in long-term survivors after lung transplantation and refractory to most interventions. Many risk factor for BOS were identified in previous studies such as acute cellular rejection, lymphocytic bronchiolitis, cytomegalovirus (CMV) and non-CMV respiratory infections, injury to the allograft or airways, Primary graft dysfunction, HLA mismatching, and organizing pneumonia. (Belperio JA. et al.). Neutrophils and their released products may be involved in the development of BOS. Neutrophilia was repeatedly observed in the bronchoalveolar lavage fluid of patients after lung transplantation. In addition, infiltration of neutrophils into the bronchial epithelium has been detected in patients with higher degrees of active airway damage. Neutrophils are capable of causing severe damage to the lung tissue by releasing toxic proteases and reactive oxygen species if not counterbalanced by the antiprotease/ antioxidant screen of the lung. Based on this background, a causal relationship between neutrophilia and the development of BOS has been proposed. (Hirsch J. et al.) Detection of unopposed Neutrophile elastase (NE) activity in BAL appears to correlate with poor outcome due to refractory BOS. Unopposed NE in these subjects may not only serve as a marker of evolving graft dysfunction but also participate in damaging the airways of the allograft and inhibit adequate bacterial clearance. Prevention of neutrophil sequestration or inhibition of NE may prevent or attenuate airway damage and improve bacterial clearance mechanisms. (Nutley D et al.) These data demonstrate the importance of neutrophils and unopposed NE in the pathogenesis of BOS and call for new approach to prevent or modulate BOS targeting this mechanism. AAT is the main inhibitor of neutrophil elastase in the lower airways and patients with AAT deficiency have low concentrations of the protein in this region of the lung. This explains the proteinase/antiproteinase theory of the development of emphysema in deficient patients in which the amount of elastase released in the lung exceeds the amount of AAT. The net result is persistence of elastase activity leading to lung destruction and the pathological changes of emphysema. (Abusriwil H. et al.) The administration of the AAT is to address proteinase/antiproteinase imbalance. Administration of AAT will help to prevent further destruction of the lung architecture and reduce the inflammatory dysregulation that causes pulmonary dysfunction. It is expected that by attacking a specific and previously untreated key component part of the pathophysiological cycle of BOS, AAT therapy would decrease the prevalence of BOS in lung transplant recipients and prolong life expectancy of these patients.
The aim of the study was to investigate the utility and safety of home management of home oxygen therapy in acute bronchiolitis. A matched case-control study, of one hundred and thirty five infants aged less than 12 months diagnosed bronchiolitis with hypoxia attending a pediatric community clinic will be randomly assigned to receive oxygen with or without standard nebulized therapy. Nebulized treatment with either 0.1% epinephrine diluted in bromhexine, or 3% hypertonic saline. Intermittent oxygen treatment will be administered 6 times daily for 7 days. Primary outcome measures will be emergency department visits/hospitalization secondary outcome measures will be changes in Bronchiolitis Caregiver Diary Score.