B4-037 Pulmonary Function Tests Flashcards

1
Q

measures how fast and how much you can breathe out

A

spirometry

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2
Q

flow volume loop: below x axis is

A

inspiratory effort

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3
Q

flow volume loop: above x axis is

A

expiratory effort

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4
Q
  • 3 acceptable manuevers
  • 2 largest FEV1 within 150 ml of each other
A

session complete

if not met, continue testing

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5
Q

provides a measurement of FRC

A

plethysmography

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6
Q

normal FEV1/FVC

A

.7-.8

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7
Q

FEV1/VC is increased

A

restriction

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8
Q

FEV1/VC <70%

A

obstructive

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9
Q

common causes of obstructive pulmonary defect

2

A
  • asthma
  • COPD
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10
Q

reduction in TLC below 5th percentile

A

restrictive

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11
Q

TLC < 80%

A

restriction

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12
Q

both FEV1/FVC
and TLC are decreased

A

mixed pulmonary defect

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13
Q
A

excellent effort

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14
Q
A

hesitating start

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15
Q
A

submaximal effort

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16
Q
A

early termination

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17
Q
A

coughing

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18
Q
A

subject briefly stopped exhaling

19
Q
A

obstructive pulmonary defect

20
Q

FEV1/VC <70%

A

obstruction

21
Q

2 main causes of obstructive defect

A

asthma
COPD

22
Q

TLC below 5th percentile

A

restrictive

23
Q

FVC reduced
FEV1/FVC normal

A

can infer restrictive, but only 58% of patient will be restricted

24
Q
A

restrictive

25
Q

TLC <80%

A

restriction

26
Q

TLC > 120%

A

hyperinflation

27
Q

is bronchodilator response capable of separating asthma and COPD?

A

no

28
Q
A

variable extrathoracic

29
Q
A

variable intrathoracic

30
Q
A

fixed

31
Q

what pulmonary function test can differentiate between asthma and empysema?

A

DLCO

32
Q

normal/elevated DLCO

A

asthma

33
Q

reduced DLCO

A

emphysema

34
Q

normal FEV1/FVC ratio

A

restrictive

35
Q

decreased FEV1/FVC

A

obstructive

36
Q

proportional reduction in both FEV1 and FVC

A

restrictive

37
Q

reduced FEV1/FVC
increased DLCO

A

asthma

obstructive disease

38
Q

atopic asthma is a

A

type 1 hypersensitivity reaction

39
Q

PFT is complete when

afther 3 attempts, the two largest FVC and two largest FEV1 are within

A

150 ml of each other

40
Q

PFT is complete when

[…] sessions have been completed

A

8

41
Q

PFT is complete when

patient […] more sessions

A

cannot complete

42
Q

can PFT give a specific diagnosis?

A

no

43
Q

plethysmography is used to calculate

A

FRC