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Old 10-02-2011
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Default Physİyology questİon

A pulmonologist is testing a patient's lung volumes and capacitie susing simple spirometry. Which of the following lung volumes orcapacitie scannot be measured directly using this technique?
A. Expiratory reserve volume
B. Functiona lresidua lcapacity
C. Inspiratory reserve volume
D. Tida lvolume
E. Vital capacity
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Old 10-02-2011
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its B ;FUNCTIONAL RESIDUAL CAPACITY
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Old 10-03-2011
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Default answe

functional residual capacity cannot be measure with spirometer so as total lung capacity also ..
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•B. Functional residual capacity
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functional residual capacity
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Old 10-03-2011
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The correct answer is B. The functional residual capacity is the amount of air left in the lungs after a normal expiration. Because this volume cannot be expired in its entirety, it cannot be measured by spirometry. Essentially, lung volume that contains the residual volume, which is the amount of air remaining after maximal expiration (e.g., functional residual capacity and total lung capacity), cannot be measured by spirometry. These volumes can be determined using helium dilution techniques coupled with spirometry or body plethysmography.
The expiratory reserve volume (choice A) is the volume of air that can be expired after expiration of a tidal volume.
The inspiratory reserve volume (choice C) is the volume of air that can be inspired after inspiration of a tidal volume.
Tidal volume (choice D) is the amount of air inspired or expired with each normal breath.
Vital capacity (choice E) is the volume of air expired after a maximal inspiration
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