Spirometry

Created by: Fredcatley
Created on: 21-12-20 10:46

Give a definition of spirometry and recommendations from NICE guidelines

-Method of assessing lung function
-Shows how quickly and effectively that lungs can be emptied and filled
-COPD NICE guidelines 2018 states that spirometry should be performed in all COPD patients

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Describe how spirometry is used for diagnosis

-Differentiates between obstructive airways disorders and restrictive
diseases

2 of 13

Define Forced Expiratory Volume (FEV1)

-Volume of air that patient is able to exhale in first second of forced expiration
-Measures FLOW

3 of 13

Define Forced Vital Capacity (FVC)

-Total volume of air that patient can forcibly exhale after full inspiration
-Measures VOLUME

4 of 13

Define FEV1/FVC ratio

Percentage of FVC expelled in the first second of forced expiration

5 of 13

Name factors that restrict lung volume

-Kyphosis
-Scoliosis
-Fibrosis
-Pleural effusion
-Pleural effusion
-Pain

6 of 13

Which factors influence predicted normal values?

-Gender
-Age
-Height
-Ethnic background

7 of 13

Describe spirometry interpretations that are normal

-FEV1 > 80% predicted
-FVC > 80% predicted
-FEV1: FVC ratio > 70%

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Describe spirometry interpretations that are abnormal

-FEV1 < 80% predicted
-FVC <80% predicted
-FEV1: FVC ratio < 70%

9 of 13

How do you work out FEV1 and FVC Percentage?

-Achieved/ Predicted *100

10 of 13

Explain how to diagnose obstructive disorders from spirometry interpretations

-FEV1 < 80% predicted normal
-FEV1/FVC ratio is reduced < 0.70

11 of 13

Explain how to diagnose a restrictive disorder from spirometry interpretations

-FEV1 < 80% predicted normal
-FVC < 80% predicted normal
-FEV1/FVC ratio normal > 0.70

12 of 13

Describe the severity of airflow obstruction in relation to FV1 table

FEV1% predicted:
-Mild _>80%
-Moderate 50-79%
-Severe 30-49%
-Very Severe <30%

13 of 13

Other cards in this set

Card 2

Front

Describe how spirometry is used for diagnosis

Back

-Differentiates between obstructive airways disorders and restrictive
diseases

Card 3

Front

Define Forced Expiratory Volume (FEV1)

Back

Card 4

Front

Define Forced Vital Capacity (FVC)

Back

Card 5

Front

Define FEV1/FVC ratio

Back

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Spirometry