Chapter 7.3

Question 1

What can a peak flow meter be used for?

Answer 1

It can be used to monitor how well their lungs are working with people with asthma

Question 2

What is a peak flow meter?

Answer 2

A simple device that measures the rate at which air is expelled from the lungs

Question 3

How do vitalographs work?

Answer 3

• They work by patients breathing out as quickly as possible as they can through a mouth piece
• Instrument then produces a graph of the amount of air they breathe out and how quickly they breathe out. (known as the forced expiatory volume in secs)

Question 4

What ca spirometer be used for?

Answer 4

It can be used to measure the different aspects of the volume of the lungs or to investigate breathing patterns

Question 5

What are the different aspects of lung volume that can be measured?

Answer 5

Tidal volume
Vital Capacity 
Inspitaory Reserve volume 
Expiratory reserve volume
Residual volume
Total lung capacity

Question 6

What is tidal volume?

Answer 6

The volume of air that moves into and out of the lungs with each resting breath (around 500 cm3 in most lungs)

Question 7

What is vital capacity?

Answer 7

The volume of air that can be breathed in when the strongest possible exhalation is followed by the deepest possible intake of breath

Question 8

What is inspiratory reserve volume?

Answer 8

Is the volume of air you can breathe in over and above the normal inhalation

Question 9

What is expiratory reserve volume?

Answer 9

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

Question 10

What is residual volume?

Answer 10

Is the volume of air that is left in your lungs when you have exhaled lungs as hard as possible. Cannot measured directly

Question 11

What is total lung capacity?

Answer 11

Is the sum of the vital capacity and residual voluume

Question 12

What is the breathing rate?

Answer 12

Is the number is the number of breaths taken per min

Question 13

What is the ventilation rate?

Answer 13

Is the total volume of air inhaled in one min

Question 14

How do you work out ventilation rate?

Answer 14

Ventilation rate
Ventilation rate = —————————————————-
Tidal volume x Breathing rate (per min)

Question 15

NEED TO KNOW

Answer 15

• The diagram that s produced when using spirometer

- Need to know how spirometer works

Question 16

What factors effect the level of gaseous exchange in the lungs?

Answer 16

Size and level of capacity