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MKSAP 17 Pulmonary and Critical Care Medicine Study guide 2024

What FEV1/FVC ratio on spirometry is consistent with airflow obstruction? - 70%
What is used to characterize the degree of obstruction? - the degree of reduction in FEV1
What is considered moderately reduced FEV1? - 50-80%
What is considered severely reduced FEV1? - 34-49%
What is considered very severely reduced FEV1? - less than 34%
In patients with obstruction, what additional test on spirometry should be performed? - bronchodilator
challenge (2-4 puffs of a short acting B2 agonist) which helps differentiate between asthma and COPD
What is considered a positive bronchodilator response? - an increase in FEV1 of 12% or 200ml
What does a normal FEV1/FVC ratio reflex? - normal lung function or may indicate a restrictive lung
defect
however, if the FEV1 and FVC are reduced proportionately with each other and are below the predicted
normal values, the spirometry results are consistent with a restrictive defect, which may be confirmed by
further testing demonstrating low lung volumes
In patients with clinical symptoms suggestive of bronchospastic disease (such as cough or unexplained
dyspnea) but with normal spirometry, what test may be diagnostically helpful? - bronchial challenge
testing (methacholine)
uses a controlled inhaled stimulus to induce bronchospasm in association with spirometry; a positive test
is indicated by a drop in the measured FEV1

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Specificaties

Niveau: University
School: Chamberlain College Of Nursing
Opleiding: NURSING
Vaknaam: MKSAP
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Vakcode: MKSAP
Document
Rubriek: Tentamens
Gemaakt op: 06-06-2024
Type: .pdf
Pagina's: 109
Taal: English

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