LUNG VOLUMES & CAPACITY
LUNG VOLUMES & CAPACITY
| Sl. No | LUNG VOLUME | METRICS |
| 1. |
Tidal volume (TV) –
|
500 ml |
| 2. |
Inspiratory reserve volume (IRV) –
|
3000 ml |
| 3. |
Expiratory reserve volume (ERV) –
|
1200 ml |
| 4. |
Residual volume (RV) –
|
1200 ml |
| Sl.no | LUNG CAPACITIES | METRICS |
| 1. |
Expiratory capacity (EC) –
|
1700 ml |
| 2. |
Inspiratory Capacity (IC) –
|
3500 ml |
| 3. |
Functional residual capacrty (FRC) –
|
2400 ml |
| 4. |
Total lung capacity (TLC) –
|
5900 ml |
| 5. |
Vital capacity (VC) –
Also,
|
4700 ml |
Exam Important
LUNG VOLUMES & CAPACITY
- Tidal Volume (TV) – Volume of air that moves in or out of the lung with each normal breath.
- Residual volume (RV) – Volume of air remaining in lungs after maximal expiration.
- Expiratory reserve volume (ERV) – 1200 ml
- Inspiratory capacity (IC) calculated by sum of tidal volume & inspiratory reserve volume IC = TV + IRV.
- Functional residual capacity (FRC) – Volume of air in lungs after expiration.
- Calculated by FRC – ERV + RV.
- About 2400 ml
- Total Lung Capacity is about 5900 ml. Depends on lung compliance.
-
Vital capacity (VC) is about 4700 ml.
-
Fraction of FVC breathed out in 1st second – Forced Expiratory Volume 1 (FEV1).
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