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5 Cards in this Set
- Front
- Back
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What is the difference b/w obstructive and restrictive lung disease? |
Obstructive = narrowing of pulmonary airways Due to: - COPD - Asthma - Bronchiectasis - Cystic fibrosis Restrictive = lungs prevented from fully expanding. Due to: - muscle weakened or damaged nerves - stiffened tissue in the chest wall - asbestosis - silicosis - pulmonary fibrosis |
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What is spirometry and what is it used for? |
A spirometer measures how effectively and how quickly the lungs can be emptied and filled by generating a flow volume curve. To distinguish between obstructive and restrictive pulmonary disease. checking for reversibility post bronchodilator. |
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What is FEV1/ FVC ratio. |
FEV1 (forced Expiratory Volume) = the amount of gas expelled in one second FVC (Forced Vital Capacity) = Total amount of gas expelled when a subject takes a deep breath and then forcefully exhales maximally.
the ratio of FEV1/FVC in healthy lungs should be 80% - 80% vol of lung exhaled in 1 second. obstructive lung disease will have decreased ratio. |
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explain the following respiratory volumes.
Inspiratory reserve volume expiratory reserve volume residual reserve volume |
TV IRV ERV RV |
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Explain the following respiratory capacities total lung capacity vital capacity Vital capacity Inspiratory capacity functional residual capacity |
TLC VC IC FRC |
