Biomaterial Database

The acute effect of ipratropium bromide bronchodilator therapy on cough clearance in COPD. 1993

W D Bennett, and W F Chapman, and J M Mascarella

Department of Medicine, University of North Carolina, Chapel Hill 27599.

Using radiolabeled, monodispersed aerosols (99mTc-iron oxide) and gamma camera analysis, we measured the efficacy of cough for clearing mucus from the airways of the lung following inhalation of the bronchodilator ipratropium bromide (IB) (Atrovent, Boehringer Ingelheim, Inc), a drug that has been shown to have no effect on mucociliary clearance in COPD. Clearance of radiolabeled aerosol was studied over a 2.5-h period on three separate days, a control day with no coughing, and two study days during which the patient performed controlled cough maneuvers over the course of clearance measurements following IB or placebo therapy (double blind, crossover). Fifteen patients, age > 45 years, with stable moderate-to-severe airway obstruction (mean FEV1/FVC = 0.45) were studied. IB diminished the effectiveness of cough for clearing the radiolabeled particles from the airways. This effect of IB on cough clearance may be due to (1) changes in the airflow dynamics induced by bronchodilation or (2) altered rheology or depth of airway secretions.

UI	MeSH Term	Description	Entries
D008173	Lung Diseases, Obstructive	Any disorder marked by obstruction of conducting airways of the lung. AIRWAY OBSTRUCTION may be acute, chronic, intermittent, or persistent.	Obstructive Lung Diseases,Obstructive Pulmonary Diseases,Lung Disease, Obstructive,Obstructive Lung Disease,Obstructive Pulmonary Disease,Pulmonary Disease, Obstructive,Pulmonary Diseases, Obstructive
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D009079	Mucociliary Clearance	A non-specific host defense mechanism that removes MUCUS and other material from the LUNGS by ciliary and secretory activity of the tracheobronchial submucosal glands. It is measured in vivo as mucus transfer, ciliary beat frequency, and clearance of radioactive tracers.	Mucociliary Transport,Clearance, Mucociliary,Clearances, Mucociliary,Mucociliary Clearances,Mucociliary Transports,Transport, Mucociliary,Transports, Mucociliary
D009241	Ipratropium	A muscarinic antagonist structurally related to ATROPINE but often considered safer and more effective for inhalation use. It is used for various bronchial disorders, in rhinitis, and as an antiarrhythmic.	N-Isopropylatropine,(endo,syn)-(+-)-3-(3-Hydroxy-1-oxo-2-phenylpropoxy)-8-methyl-8-(1-methylethyl)-8-azoniabicyclo(3.2.1)octane,Atrovent,Ipratropium Bromide,Ipratropium Bromide Anhydrous,Ipratropium Bromide Monohydrate,Ipratropium Bromide, (endo,anti)-Isomer,Ipratropium Bromide, (exo,syn)-Isomer,Ipratropium Bromide, endo-Isomer,Itrop,Sch-1000,Sch-1178,N Isopropylatropine,Sch 1000,Sch 1178,Sch1000,Sch1178
D011877	Radionuclide Imaging	The production of an image obtained by cameras that detect the radioactive emissions of an injected radionuclide as it has distributed differentially throughout tissues in the body. The image obtained from a moving detector is called a scan, while the image obtained from a stationary camera device is called a scintiphotograph.	Gamma Camera Imaging,Radioisotope Scanning,Scanning, Radioisotope,Scintigraphy,Scintiphotography,Imaging, Gamma Camera,Imaging, Radionuclide
D003371	Cough	A sudden, audible expulsion of air from the lungs through a partially closed glottis, preceded by inhalation. It is a protective response that serves to clear the trachea, bronchi, and/or lungs of irritants and secretions, or to prevent aspiration of foreign materials into the lungs.	Coughs
D004311	Double-Blind Method	A method of studying a drug or procedure in which both the subjects and investigators are kept unaware of who is actually getting which specific treatment.	Double-Masked Study,Double-Blind Study,Double-Masked Method,Double Blind Method,Double Blind Study,Double Masked Method,Double Masked Study,Double-Blind Methods,Double-Blind Studies,Double-Masked Methods,Double-Masked Studies,Method, Double-Blind,Method, Double-Masked,Methods, Double-Blind,Methods, Double-Masked,Studies, Double-Blind,Studies, Double-Masked,Study, Double-Blind,Study, Double-Masked
D005260	Female		Females
D005541	Forced Expiratory Volume	Measure of the maximum amount of air that can be expelled in a given number of seconds during a FORCED VITAL CAPACITY determination . It is usually given as FEV followed by a subscript indicating the number of seconds over which the measurement is made, although it is sometimes given as a percentage of forced vital capacity.	Forced Vital Capacity, Timed,Timed Vital Capacity,Vital Capacity, Timed,FEVt,Capacities, Timed Vital,Capacity, Timed Vital,Expiratory Volume, Forced,Expiratory Volumes, Forced,Forced Expiratory Volumes,Timed Vital Capacities,Vital Capacities, Timed,Volume, Forced Expiratory,Volumes, Forced Expiratory