Week 4

Question 1

Define:

• TLC
• IC
• IRV
• TV
• ERV
• RV
• FRC
• VC

Answer 1

• TLC=Total Lung Capacity
• IC=Inspiratory Capacity
• IRV=Inspiratory Reserve Volume
• TV=Tidal Volume
• ERV=Expiratory Reserve volume
• RV=Residual volume
• FRC=Functional Residual Capacity
• VC=Vital Capacity

Question 2

Explain

• Residual volume
• Expiatory reserve volume
• Inspiratory reserve volume
• Vital capacity
• Tidal volume

Answer 2

• Residual volume: what is left over in the lungs after expiration
• Expiratory reserve volume: the max that you can force out
• Inspiratory reserve volume: the max that you can inhale in
• Vital capacity: max inhalation and exhalation that you can do in a breath
• Tidal volume: normal minute-to minute breath
  Total lung capacity-all of it

Question 3

Explain difference in FRC and IC during supine vs standing

Answer 3

• supine: FRC decreases and IC increases because you have the abdominal cavity and contents pushing up which makes it harder to breathe
• standing: FRC increases and IC decreases

Question 4

What happens to residual volume, functional residual capacity in obstructive lung disease?
- FEV1/FVC

Answer 4

• will increase
• will decrease because you have a harder time with the forced expiration for one second, but you have a lot of volume, so the breath can go for a longer time.

Question 5

What happens to functional residual capacity and total lung capacity in restrictive lung disease?
- FEV1/FVC ? why?

Answer 5

• FRC decreases, total lung capacity decrease

- would be normal or elevated ; normal bc ratio is staying the same but the volumes are changing in proportion

Question 6

Why is spirometry useful?

Answer 6

• can measure FEV1/FVC ratio by putting the results on a volume time curve
• FVC will the the highest the curve goes and FEV is the volume after one second