Term
| Muscles involved in Inspiration |
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Definition
Diaphragm
External Intercostals
Accessory Muscles -
-sternocleidomastoid
-scalene muscles
-serratus anterior
-pectoralis minor |
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Term
| Muscles involved in expiration |
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Definition
internal intercostals
abdominal muscles |
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Term
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Definition
| rebound of lungs after being stretched by inhalation |
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Term
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Definition
Bronchial sounds - produced by air moving through large airways (trachea and bronchi)
Vesicular breathing sounds - produced by air filling alveolar sacs (rustle or muffled breeze) |
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Term
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Definition
| (500 ml) volume of air moved in or out of the lungs during quiet breathing |
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Term
| Inspiratory reserve volume (IRV) |
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Definition
| (3100 ml) volume of air that can be forcefully inhaled after a normal tidal volume inhalation |
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Term
| Expiratory reserve volume (ERV) |
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Definition
| (1200 ml) volume of air that can be forcefully exhaled after a normal tidal volume exhalation |
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Term
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Definition
maximum volume that can be exhaled after taking the deepest breath possible (maximal inspiration).
VC = TV + IRV + ERV |
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Term
| Minute Respiratory Volume (MRV) |
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Definition
volume inhaled or exhaled from a persons lungs in one minute.
MRV = TV * Respirations/minute |
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Term
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Definition
amount of air left in the lungs after a maximum expiratory effort. Cannot be directly measured, only approximated.
RV = VC * Factor |
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Term
| Forced Vital Capacity (FVC) |
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Definition
| Total volume of air that can be breathed out of the lungs with maximum effort in 1 breath. Low FVC in those with restrictive pulmonary disease (i.e. polio, TB) |
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Term
| Forced Expiratory Volume (FEV1) |
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Definition
| measure of how much air is breathed out in 1st second during FVC. Low FEV in those with obstructive pulmonary disease (chronic bronchitis, asthma) |
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