RESPIRATORY
CHRONIC OBSTRUCTIVE PULMONARY DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Patients with chronic obstructive pulmonary disease often have decreased forced expiratory volume in one second (FEV1)
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Asthmatic patients often have decreased forced expiratory volume (FVC)
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FEV1/FVC in patients with chronic obstructive pulmonary disease is mostly normal
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Diffusion capacity for carbon monoxide (DLco) decreases in asthmatic patients
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Detailed explanation-1: -This quick test measures the amount of nitric oxide gas that is exhaled, by having you breathe into a mouthpiece attached to a tube that leads to an electronic measurement device. High levels of exhaled nitric oxide in your breath can mean that your airways are inflamed, which can help the doctor diagnose asthma.
Detailed explanation-2: -Spirometry is the essential test to confirm the diagnosis and establish the staging of COPD. If values are abnormal, a post-bronchodilator test may be indicated. Airflow limitation that is irreversible or only partially reversible with bronchodilator is suggestive of COPD rather than asthma.
Detailed explanation-3: -FEV1 values and COPD A pulmonary function test, also known as a spirometry test, involves breathing forcefully into a mouthpiece. FEV1 values that are lower than average suggest the presence of COPD or another condition that is causing breathing difficulties.
Detailed explanation-4: -Spirometry. This is the recommended test to confirm asthma. During this test, you breathe into a mouthpiece that’s connected to a device, called a spirometer, or to a laptop. It measures the amount of air you’re able to breathe in and out and its rate of flow.