A SIMPLE SPIROMETER B SPIROGRAPHIC RECORD Expiration makes the bell of the spiro

Question

A SIMPLE SPIROMETER B SPIROGRAPHIC RECORD Expiration makes the bell of the spirometer move upward After maximal inspiration, the subject exhales as much air as fast as possible Floating drum Lungs Counter balance IRV FEV, /weight 4 TV Lung volume 3 Air ERV Pen FRC RV Water Recorder Time Volume and Capacities (liters) IRV Inspiratory reserve volume 1.9-2.5 TV Tidal volume RV = Residual volume IC Inspiratory capacity VC Vital capacity 0.4-0.5 ERV Expiratory reserve volume 1.1-1.5 1.5-1.9 4.9-6.4 2.3-3.0 Workings of a simple spirometer TLC Total lung capacity FRC Functional residual capacity 2.6-3.4 3.4-4.5

Explanation / Answer

For studying of air moving in and out of the lungs monitored by spirometer. Graphical representation of the measures is called spirograph.

Components of Spirographic record:

IRV:inspiratory reserve volume is the air inspired with Maximal inspiratory efforts, in excess of tidal volume.

TV: Tidal volume is the amount of air move into the lungs with each inspiration or amount of air moves out of the lungs with each expiration.

ERV: Expiratory reserve volume is the amount of air moves out of the lung with Maximal expiratory efforts.

RV: Residual Volume is the amount of air remain in the lungs after a Maximal expiratory effort.

TLC:Total lung capacity is the sum of vital capacity and residual volume.

IC:inspiratory capacity is the amount of air a person can breathe, beginning at resting expiratory level and distending the lungs to maximum amount.

FRC:Functional residual capacity is the amount of air remaining in the lungs at the end of normal expiration.

VC: Vital capacity is the greatest amount of air that can be expired after a Maximal inspiratory effort.

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