Bronchial challenge test

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There are some respiratory diseases such as exercise-induced asthma that are not apparent unless the patient is exposed to some sort of trigger, such as a chemical irritant, an allergen, cold or dry air, or rigorous exercise. To diagnose these conditions, a bronchial challenge test is performed. This is to discover which environmental conditions may triggering the bronchospasm, or sudden contraction of the bronchioles, and subsequent breathing problems. This test also helps determine the extent of the reaction.

As part of this test, the patient's medical history is taken and possible triggers are discussed. Spirometry tests are taken. The patient is exposed to whatever triggers the breathing problem, under controlled conditions. Spirometry tests are again taken, and compared with the earlier results.

In such tests, pharmaceutical agents such as methacholine or histamine may be used.

Sometimes, to assess the reversibility of a particular condition, a bronchodilator is administered before performing another round of tests for comparison. This is commonly referred to as a reversibility test, or a post bronchodilator test (Post BD), and is an important part in diagnosing asthma versus COPD.

v • d • e Respiratory system, physiology: respiratory physiology
Volumes	lung volumes - vital capacity - functional residual capacity - respiratory minute volume - closing capacity - dead space - spirometry - body plethysmography - peak flow meter - thoracic independent volume - bronchial challenge test
Airways	ventilation (V) (positive pressure) - breath (inhalation, exhalation) -respiratory rate - respirometer - pulmonary surfactant - compliance - hysteresivity - airway resistance
Blood	pulmonary circulation - perfusion (Q) - hypoxic pulmonary vasoconstriction - pulmonary shunt
Interactions	ventilation/perfusion ratio (V/Q) and scan - zones of the lung - gas exchange - pulmonary gas pressures - alveolar gas equation - hemoglobin - oxygen-haemoglobin dissociation curve (2,3-DPG, Bohr effect, Haldane effect) - carbonic anhydrase (chloride shift) - oxyhemoglobin - respiratory quotient - arterial blood gas - diffusion capacity - Dlco
Control of respiration	pons (pneumotaxic center, apneustic center) - medulla (dorsal respiratory group, ventral respiratory group) - chemoreceptors (central, peripheral) - pulmonary stretch receptors (Hering-Breuer reflex)
Insufficiency	high altitude - oxygen toxicity - hypoxia

v • d • e WikiDoc Research Resources for Bronchial challenge test
Articles on Bronchial challenge test	Most recent articles on Bronchial challenge test • Most cited articles on Bronchial challenge test • Review articles on Bronchial challenge test • Articles on Bronchial challenge test in N Eng J Med, Lancet, BMJ
Media (Slides, Video, Images, MP3) on Bronchial challenge test	Powerpoint slides on Bronchial challenge test • Images of Bronchial challenge test • Photos of Bronchial challenge test • Podcasts & MP3s on Bronchial challenge test • Videos on Bronchial challenge test
Evidence Based Medicine Regarding Bronchial challenge test	Cochrane Collaboration on Bronchial challenge test • Bandolier on Bronchial challenge test • TRIP on Bronchial challenge test
Cost Effectiveness of Bronchial challenge test	Cost Effectiveness of Bronchial challenge test
Clinical Trials Involving Bronchial challenge test	Ongoing Trials on Bronchial challenge test at Clinical Trials.gov • Trial results on Bronchial challenge test • Clinical Trials on Bronchial challenge test at Google
Guidelines / Policies / Government Resources (FDA/CDC) Regarding Bronchial challenge test	US National Guidelines Clearinghouse on Bronchial challenge test • NICE Guidance on Bronchial challenge test • NHS PRODIGY Guidance • FDA on Bronchial challenge test • CDC on Bronchial challenge test
Textbook Information on Bronchial challenge test	Books and Textbook Information on Bronchial challenge test
Pharmacology Resources on Bronchial challenge test	Dosing of Bronchial challenge test • Drug interactions with Bronchial challenge test • Side effects of Bronchial challenge test • Allergic reactions to Bronchial challenge test • Overdose information on Bronchial challenge test • Carcinogenicity information on Bronchial challenge test • Bronchial challenge test in pregnancy • Pharmacokinetics of Bronchial challenge test •
Genetics, Pharmacogenomics, and Proteinomics of Bronchial challenge test	Genetics of Bronchial challenge test • Pharmacogenomics of Bronchial challenge test • Proteomics of Bronchial challenge test
Newstories on Bronchial challenge test	Bronchial challenge test in the news • Be alerted to news on Bronchial challenge test • News trends on Bronchial challenge test
Commentary on Bronchial challenge test	Blogs on Bronchial challenge test
Patient Resources on Bronchial challenge test	Patient resources on Bronchial challenge test • Discussion groups on Bronchial challenge test • Patient Handouts on Bronchial challenge test • Directions to Hospitals Treating Bronchial challenge test • Risk calculators and risk factors for Bronchial challenge test
Healthcare Provider Resources on Bronchial challenge test	Symptoms of Bronchial challenge test • Causes & Risk Factors for Bronchial challenge test • Diagnostic studies for Bronchial challenge test • Treatment of Bronchial challenge test
Continuing Medical Education (CME) Programs on Bronchial challenge test	CME Programs on Bronchial challenge test
International Resources on Bronchial challenge test	Bronchial challenge test en Espanol • Bronchial challenge test en Francais
Business Resources on Bronchial challenge test	Bronchial challenge test in the Marketplace • Patents on Bronchial challenge test
Informatics Resources on Bronchial challenge test	List of terms related to Bronchial challenge test

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Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .