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Pulmonary Function Test Flashcards

(11 cards)

1
Q

What are the reasons why spirometric tests may be undertaken?

A
  • Evaluate if there’s any lung diseaseand discern whether it is obstructive or restrictive
  • Monitor progression of disease
  • Check if treatment is working
  • used for screening
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2
Q

What non diseasefactors have the greatest influence on healthy lung volumes

A

Age

Height

Gender

Activity

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3
Q

What are the disease related factors that can affect gas exchange in lungs?

A
  • COPD
  • Emphysema
  • Fibrosis of the lungs/oedema
  • Asthma

they all affect the variables in Fick’s LAW

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4
Q

What are the major advantages of Spirometry pulmonary function tests

A
  • Cheap and easy to use
  • Non invasive
  • Takes a short amount of time to perform
  • Can extract a lot of information from results
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5
Q

What are the major disadvantages of Spirometric pulmonary function tests

A
  • Cause light headness/syncope
  • Quite hard for people to use
  • May not have motivation to blow out to get maximum response
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6
Q

What is the difference between static lung tests and dynamic lung tests

give examples of each

A

Static is just measuring a volume

Dynamic is measuring a flow rate and volume over a short period of time

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7
Q

Calculate FEV1, (FEV1/FVC) and PEF

what disease if any does the patient have

explain the airflow pattern at the end after t=2secs

How can I confirm that this is Truly reflective of this patient’s PEF, FEV1, etc

A

Irregular airflow pattern- the patient is a poor blower and can’t perform tests properly

Do tests 3 times to get consistent results; if not consistent/concordant look for other tests

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8
Q

LOOK at the graph- red line

calculate every possible thing you could from it

Say what type of disease it is

What is the effect of the blue line

A

Obstrucitve disease pattern

blue line represents bronchodilators added - it increases FEV1, and PEF. However, FVC is the same

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9
Q

What are the possible reasons for having a restrictive disease pattern

A
  • Fibrosis
  • obesity
  • weak respiratory muscles
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10
Q

In this case why was predicted VC much higher than actual VC

A

Test performed why sitting down. RIBS CANT expand as much and content of the gut are pushing against diaphragm hence diaphragm cant move downwards as much as possible.

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11
Q

Look at this graph; comment on the differences between normal tidal breathing and hyper inflated lungs

also try to locate PEF

A

Flow rate gets larger

higher rate of breathing (BPM)

the Thresholds for T Volume increased- as you didnt empty all lungs out; i.e. you’re breathing using inspiratory reserve volume. However amount of air you breathe put is the same.

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