|drug188||Chest computed tomography (CT) Wiki||1.00|
|drug697||Reverse-transcription polymerase chain reaction (RT-PCR) Wiki||1.00|
|D014777||Virus Diseases NIH||0.11|
There is one clinical trial.
Bronchiectasis is clinically characterized by irreversible dilation of the bronchi and bronchioles leading to persistent cough, purulent sputum, and airway ﬂow limitation, which may be accompanied by recurrent exacerbations.It has been increasingly recognized that respiratory viruses are mainly responsible for acute exacerbation of chronic pulmonary diseases, i.e. asthma, chronic obstructive pulmonary disease and cystic fibrosis. However,little is known about the roles of viral infection in driving exacerbations of bronchiectasis.This study aims to identify the frequency of common viral infections and determine the roles that viruses play in acute exacerbations of bronchiectasis.
Description: Respiratory viruses in the nasal swab and sputum will be identified using the polymerase chain reaction(PCR)technique when clinically stable and during exacerbation.The following viruses will be tested for:influenza A,B(including influenza A H1N1),respiratory syncytial virus(RSV),Enterovirus,Parainfluenza 1-4,Rhinovirus,human Coronaviruses(subtypes OC43、229E、HKU1),human metapneumovirus,adenovirus, human bocavirus,chlamydia,mycoplasma.Measure: The prevalence of respiratory virus infection in adults with bronchiectasis during a pulmonary exacerbation and when clinically stable. Time: 1 year
Description: Systemic and airway inflammatory cytokines including IL-1β、IL-6、IL-8、TNF-a were measured using a commercial multiplex bead-based assay.Measure: The effect of respiratory virus infection on systemic and pulmonary inflammatory markers. Time: 1 year
Description: Spirometric indices in the present study is referred to as forced expiratory vilume in 1s(FEV1),forced vital capacity(FVC).Spirometry tests are carried out using a spirometer (COSMED, QUARK PFT, Italy). All operation procedures meet the joint recommendation by ATS and ERS. A total of at least 3 (not more than 8) spirometric maneuvers are performed, with the variation between the best two maneuvers of <5% or 200ml in FVC and FEV1. The maximal values of FVC and FEV1 are reported.Measure: The effect of respiratory virus on lung function Time: 1 year
Description: Type of bacterial infection, also referred to as potentially pathogenic organisms, and bacterial load, as expressed in cfu per mililiterMeasure: The effect of respiratory virus infection on the bacterial load in bronchiectasis. Time: 1 year
Description: The time from exacerbation onset by which a 3-d moving average was equal to or exceeded the baseline valueMeasure: Time to recovery of respective symptom Time: 1 year
Description: Quality of life in patients with bronchiectasis were measured by St.George Respiratory Questionnaire、Leicester Cough Questionnaire and COPD assessment test during exacerbations,and then compared between virus-postive and virus-negative patientsMeasure: The effect of respiratory virus on quality of life in patients with bronchiectasis Time: 1 year