Respiratory system express
Spirometer
A device that measures the respiratory volumes.
Inspiratory reserve volume
It is the amount of air that can be inspired forcefully beyond the resting tidal volume. 3000 mL
Expiratory reserve volume
It is the amout of air that can be expired forcefully beyond the resting tidal volume. 1100 mL
Functional residual capacity
It is the expiratory reserve volume plus the residual volume. The amount of air remaining in the lungs at the end of a normal expiration 2300mL.
Spirometry
It is the process of measuring volumes of air that move into and out of the respiratory system
Forced expiratory vital capacity
It is the rate at which lung volume changes during direct measurement of the vital capacity. Individual inhales maximally and exhales maximally in spirometer.
Vital capacity
It is the sum of the inspiratory reserve volume, tidal bolume, expiratory reserve volume. Maximum volume of air that a person can expel from the respiratory tract after a maximum inspiration. 4600mL
Total lung capacity
It is the sum of the inspiritaory and expiratory reserves and the tidal and residual volumes. or Vital capacity plus residual volume. All volumes. 5800 mL
Inspiratory capacity
It is the tidal volume plus the inspiratory reserve volume. The amount of air can inspire maximally after a normal experiation. 3500 mL
Tidal volume
It is the volume of air inspired or expired with heach breath. 500mL
Residual volume
It is the volume of air still remaining in the respiratory passages and lungs after maximum expiration. 1200 mL
500
Normal Tidal volume (ml)
1100
Normal expiratory reserve volume
3500
Normal inspiratory capacity (Tidal volume+Inspiratory reserve volume)
3000
Normal inspiratory reserve volume
5800
Normal total lung capacity. (all four)
4600
Normal vital capacity (inspiratory reserve+tidal volume+expiratory reserve volume)
Respiratory volumes
They are measures of the amount of air movement during different portions of ventilation
Respiratory capacities
They are the sums of two or more respiratory volumes.
Anatomical dead space
Volume of passageways where gas exchange does not occur at all.
2300
normal residual capacity (expiratory reserve+residual)
1200
normal residual volume
