Excahnge Surfaces Spirometer Calculations

Question 1

Breathing rate

Answer 1

The number of breathes taken in or out in one minute (number of peaks per minute)

Question 2

pulmonary ventilation rate

Answer 2

The total volume of air moved into the lungs in one minute
PVR= TV x breathing rate

Question 3

forced vital capacity

Answer 3

Maximum volume of air that can be inhaled or exhaled in one breath approximately 5dm3
It can vary due to gender, size, age and exercise
FVC=TV+ERV+IRV

Question 4

residual volume

Answer 4

The volume of air which remains in the lungs after you approved out as the place possible (1.5dm3)
•keeps of alveoli open at all times
•allows continuous gas exchange to occur between breaths

Question 5

Forced expiratory volume

Answer 5

maximum volume of air that can be breathed forcefully out of the lung in 1 second
FEV1 decreases with age, due to loss of elasticity of the internal intercostal muscles

Question 6

tidal volume

Answer 6

Volume of a taken in a normal breath (0.5dm3)

Question 7

inspiratory reserve volume

Answer 7

Extra volume of air that can be inspired

Question 8

inspiratory capacity

Answer 8

Volume of air that can be inspired (TV+ IRV)

Question 9

expiratory reserve volume

Answer 9

Extra volume that can be expired

Question 10

Functional residual capacity

Answer 10

Volume of air remaining in the lungs after normal exhalation

Question 11

Rate of oxygen consumption

Answer 11

=volume of oxygen consumed / time