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1

What instruments do we use to assess lung function?

-Stethoscopes
-Spirometer
-Peak flow meter

2

What are we listening for when using a stethoscope?

to listen for
-breath sounds
presence of mucus/fluid
-absence of breath sounds: collapsing lung?

3

What is a peak flow meter used to measure? And in who?

-measure the speed at which you can exhale
-used by chronic asthmatics on a regular basis, keep diaries of results
-need to have a certain amount of skill to use this
-very specific tool

4

How does a Spirometer work?

-nose clip worn
-breathe in and out of the mouth piece
-water in a container with a floating drum which moves up and down and feeds info into the computer

5

tidal volume

normal amount of air moved in or out in one quiet breath

6

vital capacity

amount of air that can be expelled from the lungs after forceful inhalation

7

inspiratory reserve volume

amount of air that can be inhaled after tidal inhalation

8

total lung capacity

the amount of air that can be held in the lungs after mac

9

residual volume

the amount of air that remains in the lungs during deep exhalation

10

total lung capacity women

4.2L

11

total lung capacity men

6L

12

residual volume men

1.2L

13

residual volume women

1.1L

14

expiratory reserve volume men

1.0L

15

expiratory reserve volume women

0.7L

16

inspiratory reserve volume men

3.3l

17

inspiratory reserve volume women

1.9L

18

Tidal volume for men

500ml

19

Tidal volume for women

500ml

20

what will happen if you breathe out all the air in your lungs

they will collapse

21

expiratory reserve volume

the amount of air that can be forcibly exhaled after normal tidal exhalation

22

total capacity=

IRV + tidal volume + ERV + residual volume

23

Functional residual capacity

-volume of air left in the lungs after normal exhalation
ERV+RV
-cannot be measured by spirometer (because RV can't)
-helps to stabilise the composition of alveolar air

24

inspiratory reserve volume

the amount of air that can be forcibly inhaled after normal tidal inhaliation

25

Vital capacity

amount of air that can be expired after maximum inspiratory effort
VC=IRV+TV+ERV

26

Vital capacity men

4.8L

27

Functional residual capacity

volume of air remaining in the lungs after tidal expiration
FRV= ERV+RV

28

vital capacity women

3.4L

29

Inspiratory capacity

amount of air that can be inspired after TIAL exhalation
IC = IRV +TV

30

Bigger volumes for males because

higher muscle mass and bigger thoracic cavity due to general size