Lecture 10 - Clinical Assessment of Lung Function Flashcards Preview

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Flashcards in Lecture 10 - Clinical Assessment of Lung Function Deck (19):
1

Spirometry?

Concurrent measurement of flow and volume duirng maximum effort expiration followed by maximum effort inspiration

2

Spirometry uses?

diagnose obstructive ventilatory defect, assess fitness, intervention or effect of workplace exposure

3

Static Lung Volumes and TLC?

Measure all static volumes and capacities of the lung

4

Static Lung Volumes/TLC Uses?

diagnosis of restrictive ventilatory defect

5

Measurement techniques for residual volume?

Plethysmography, nitrogen washout, helium dilution

6

Plethysmography function?

boyles law (P1V1 = P2V2), measuring pressures and change in volume to determine original volume

7

Helium dilution function?

conservation of mass principle (C1V1=C2V2), when concentration in helium bucket doesnt change (C2), is equal to concentration in lung, therefore calculate volume

8

Nitrogen wash-out function?

using V nitrogen / 0.79 (conc. of nitrogen) = Vfrc

9

Single breath carbon monoxide diffusing capacity (DLco)?

Evaluates transfer of gas from airspaces in pulmonary capillaries

10

DLco uses?

evaluation of parenchymal lung disease, differentiating chronic bronchitis, emphysema and asthma, evaluating pulmonary involvement in systemic disease, arterial desaturation during exercise in lung disease

11

Bronchodilator response - reversibility?

indicated by FEV1 increase of 12-15% (200mL or greater)

12

Bronchodilator response uses?

indicate reversibility of airway obstructions, evaluate drug regimes for hyper-reactive airways, reversal of bronchospasm

13

Bronchoprovation tests?

evaluation of airway hyper-responsiveness, indicated in diagnosis of asthma

14

Challenge test types?

direct (pharmacological) and indirect (hypertonic challenges)

15

Sensitivity?

percentage of asthmatics who test positive in specific screening

16

Specificity?

percentage of patients without disease who test negative

17

Progressive exercise test components?

ECG, BP, power output, exhaled gas analysis, arterial haemoglobin saturation

18

Progressive exercise test interpretation?

assessing peak oxygen consumption and determining limitations to increases, measurement of stressors on cardio-pulmonary system

19

CPET uses?

exercise capacity and impairment, treatment evaluation, cardiac transplant evaluation, dyspnoea evaluation