Lung Volumes & Capacity

Question 1

What is minute respiratory volume?

Answer 1

The amount of new air moved into the respiratory passages each minute.

MRV= Tidal Volume x Respiratory rate
=. 500ml x 12
=6 L/min

Question 2

What’s the difference between lung volumes & lung capacities?

Answer 2

Volumes- don’t overlap, add up to the Total Lung Capacity
Capacity- overlap,sum of 2 or more volumes

Question 3

Definitions of all the 4 types of lung volumes;

Answer 3

Tidal volume-the volume inhaled/exhald during breathing;500ml at rest

Residual volume-the volume left after Maximal exhalation(protests from collapsing)

Expiratory reserve volume-The additional volume that can be exhaled after normal expiration

Inspiratory reserve volume- The additional volume that can be inhaled after normal inspiration.

Question 4

Definitions or calculations of the 4 types of lung capacities;

Answer 4

1.Total Lung Capacity-VT+ERV+IRV+RV

2.Vital lung capacity-IRV+ERV+VT

3.Functional Residual Capacity- RV+ERV

4.Inspiratory Capacity- IRV+VT

Question 5

What is total lung capacity

Answer 5

Maximum volume of air that the lungs can hold
Volume of air in the lungs after maximum inhalation

Question 6

What is functional residual capacity?

Answer 6

The volume of air in the lungs after NORMAL expiration