Pulmonary Terms/Values

Question 1

Tidal Volume

Answer 1

Volume of gas inhaled (or exhaled) during a normal resting breath.

500 mL

Question 2

Inspiratory Reserve Volume (IRV)

Answer 2

Volume of gas that can be inhaled beyond a normal resting tidal inhalation.

Question 3

Expiratory Reserve Volume (ERV)

Answer 3

Volume of gas that can be exhaled beyond a normal resting tidal exhalation.

Question 4

Residual Volume (RV)

Answer 4

Volume of gas that remains in the lungs after ERV has been exhaled.

Question 5

Inspiratory Capacity

Answer 5

(IRV + TV)

The amount of air that can be inhaled from Resting End Expiratory Pressure (REEP).

Question 6

Vital Capacity

Answer 6

(IRV + ERV + TV)

The amount of air that is under volitional control; Conventionally measured as Forced Expiratory Vital Capacity (FVC).

Question 7

Functional Residual Capacity

Answer 7

(ERV + RV)

Amount of air that resides in the lungs after a normal resting tidal exhalation.

Question 8

Total Lung Capacity

Answer 8

(IRV + ERV + TV + RV)

Total amount of air that is contained within the thorax during max inspiratory effort.

Question 9

Bicarbonate (HCO3)

for metabolic acid/alkalosis

Answer 9

Normal value:

22 - 26 mEq/L

Question 9

Forced Expiratory Volume in 1 second (FEV1)

Answer 9

FEV1/FVC1 X 100 > 70%

The amount of air exhaled during the first second of FVC. In the healthy person, at least 70% of the FVC is exhaled within the first second.