Measuring Capacity Of The Lungs

Question 1

What are the 3 methods of measurement?

Answer 1

1. Peak flow meter
2. Vitalograph
3. Spirometer

Question 2

What is a peak flow meter?

Answer 2

Measures rate at which air can be expelled from lungs. Often used by people with asthma to monitor their lung health

Question 3

What is a vitalograph?

Answer 3

More sophisticated version of a peak flow meter. Patient breathes out as quickly as possible through a mouthpiece.

It makes a graph of the forced expiratory volume and how quickly it is breathed out

Question 4

What is a spirometer?

Answer 4

Used to measure different aspects of lung volume/investigate breathing patterns.

Made of a submurged chamber that tises and fslls with exhales and inales

Question 5

Tidal volume?

Answer 5

Volume of air that moves in and out of lungs with each resting breath. Aprox 500cm3 (15% of vital capacity)

Question 6

Vital capacity

Answer 6

The largest possible exhale after the largest possible inhalation

Question 7

Inspiratory reserve volume

Answer 7

Max volume of air you can breath in, over and above normal inhalation

Question 8

Expiratory reserve volume

Answer 8

Extra amount of air you can force out of your lungs over and above normal tidal volume you breathe out

Question 9

Residual volume

Answer 9

Volume of air that is left in your lungs after you have exhaled as hard as possible. Cant be directly measured

Question 10

What precautions are taken when using a spirometer?

Answer 10

Canister of soda lime to dissolve co2 produced

Nose clip so all air breathed in is from the spirometer and all co2 breathed out goes into spirometer