Lab1 Lung volumes and capacities

Question 1

How we can measure residual volume ?

Answer 1

1. Helium dilution method

2. Whole body plethysmography

Question 2

What are the volumes that can’t be measured by spirometry ?

Answer 2

1. RV
2. FRC
3. TLC

Question 3

In flow- volume loop, what is are the phases of expiration ?

Answer 3

1. Ascending —

Question 4

What are the parameters that can decrease in obstructive diseases?

Answer 4

1. PEFR
2. FEF50%
3. FEF75%
4. FVC ( as the RV increases in expense VC )