SPIROMETRY
| A |
Tidal volume |
|
| B |
Vital capacity |
|
| C |
FEV |
|
| D |
None of the above |
Spirometry measures all of the following, except:
| A |
Tidal volume |
|
| B |
Vital capacity |
|
| C |
FEV |
|
| D |
None of the above |
None of the above.
- Spirometry can measure (spirometric measurement are):-
- Tidal volume (TV), inspiratory reserve volume (IRV), expiratory reserve volume (ERV) & vital capacity (VC) / FEV1.
| A |
Is a part of the expiratory reserve volume |
|
| B |
Is a part of vital capacity |
|
| C |
Cannot be measured directly with a spirometer |
|
| D |
Represents the resting volume of the lungs |
The volume of air remaining in the lungs after a maximal effort to exhale all the air possible (ie, after your best effort to “empty” your lungs) is the residual volume. This volume cannot be measured directly by a spirometer, which measures only change in volume. Since you cannot voluntarily change your lung volume below the residual volume, the spirometer cannot measure it. Other methods (eg, body plethysmography, inert gas dilution) must be used to measure residual volume.
Which of the following is measured by the device, Bellow’s spirometer?
| A |
TLC |
|
| B |
RV |
|
| C |
Closing volume |
|
| D |
ERV |
The spirometer is a simple device for measuring gas volumes. The frequently used water spirometer, rolling seal spirometer and bellows spirometer. The last two are not water-filled and are more portable.
| A |
Tidal volume |
|
| B |
Vital capacity |
|
| C |
Forced expiratory volume |
|
| D |
None of the above |
Residual volume (RV) is the one volume that cannot be measured with a spirometer. The RV cannot be measured with the spirometer because this air cannot be expressed from the lungs. It is measured by indirect methods, such as the helium dilution methods, the nitrogen washout methods, or body plethysmography. Since spirometry cannot measure RV, it is not possible to determine functional residual capacity (FRC) and total lung capacity (TLC) from this test.
- Functional Residual Capacity(FRC) = Residual Volume + Expiratory Reserve Volume.and
- Total Lung Capacity = Insp Reserve Volume + Tidal Volume + Exp Reserve Volume + Residual Volume
| A |
TLC |
|
| B |
ERV |
|
| C |
IRV |
|
| D |
FVC |
Ans:A.)TLC
Spirometry can measure :- Tidal volume (TV), inspiratory reserve volume (IRV), expiratory reserve volume (ERV), vital capacity (VC), forced vital capacity (FVC), FEVI.
Spirometry cannot measure :- Residual volume (RV), functional residual capacity (FRC), total lung capacity (TLC).
| A |
Tidal volume |
|
| B |
Residual volume |
|
| C |
Vital capacity |
|
| D |
Inspiratory reserve capacity |
B i.e. Residual Volume
Routine spirometry can’t estimate :
| A |
FRC |
|
| B |
VC |
|
| C |
FEV |
|
| D |
ERV |
A i.e. FRC
True about Wright’s Spirometer is/are
| A |
Flow rates can be calculated |
|
| B |
Gives false high values at low flow rates |
|
| C |
Gives false low values at high flow rates |
|
| D |
All |
A i.e. Flow rates can be calculated
Spirometry cannot measure ‑
| A |
RV |
|
| B |
TV |
|
| C |
IRV |
|
| D |
ERV |
Ans. is ‘a’ i.e., RV
Spirometry can measure :- Tidal volume (TV), inspiratory reserve volume (IRV), expiratory reserve volume (ERV), vital capacity (VC), forced vital capacity (FVC), FEVI.
Spirometry cannot measure :- Residual volume (RV), functional residual capacity (FRC), total lung capacity (TLC).
