Pulmonary Function Testing Flashcards

(35 cards)

1
Q

Name an effort dependant test.

A

Spirometry

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2
Q

Asthma

A
FEV1 = lower
FVC = normal
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3
Q

COPD

A
FEV1 = lower 
FVC = lower
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4
Q

Describe the graph made for expiratory flow rates.

A

Flow rate plotted against forced expiratory volume

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5
Q

Volume dependant expiratory airway closure could be a sign of?

A

Asthma

Chronic bronchitis

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6
Q

Pressure dependant expiratory airway closure could be a sign of?

A

Emphysema

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7
Q

What is peak expiratory flow rate expressed in?

A

Litres per minute

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8
Q

What could peak expiratory flow be measured with?

A

Simple linear peak flow meter

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9
Q

In obstructive disease is?

A

NORMAL or REDUCED

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10
Q

In asthma, FVC is?

A

NORMAL

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11
Q

In COPD, FVC is?

A

REDUCED

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12
Q

In obstructive disease, the FEV1/FVC ratio is?

A

<75%

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13
Q

Describe the FEV1 response after a beta agonist in asthma

A

> 15%

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14
Q

Describe the FEV1 response after a beta agonist in COPD?

A

<15%

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15
Q

Describe PEFR in obstructive diseases.

A

REDUCED

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16
Q

Describe PEFR in restrictive diseases.

17
Q

FEV1 in restrictive diseases?

18
Q

FVC in restrictive diseases?

19
Q

In restrictive disease, the FEV1/FVC ratio is?

20
Q

There is no change in FEV1 after giving a beta agonist in restrictive diseases?

21
Q

Name 3 things that bronchial challenge can be done with.

A

Exercise
Histamine/Mannitol/Methacholine
Allergens/Chemicals

22
Q

What should be done to diagnose between cardiac and respiratory dyspnoea?

A

Full cardiopulmonary exercise test (CPET)

23
Q

How is CPET done?

A

HR x O2 uptake x ventilatory rate

24
Q

Describe exercise testing results post exercise in asthma.

A

Decreased FEV1 or Decreased PEF

25
What should be done in interstitial lung disease in exercise testing and why?
Decrease SaO2 | To monitor treatment response
26
Describe TLC in restrictive lung disease.
DECREASED
27
Describe TLC in emphysema. Why?
INCREASED | Hyperinflation
28
TLC =
VC + RV
29
RV =
FRC - ERV
30
How is airway resistance measured?
Whole body plethysmographsmography OR Impulse oscillometry
31
What does impulse oscillometry measure?
Airway resistance during quiet tidal breathing different frequencies to give total resistance
32
Exhaled breath nitric oxide measured at a flow of 50mls/s is a marker of?
Eosinophilic airway inflammation in asthma
33
Why is nitric oxide not useful in COPD?
It is suppressed by smoking
34
What do high levels of exhaled NO mean?
Uncontrolled asthmatic inflammation
35
When can NO be used in asthma?
When spirometry is normal