SPIROMETRY - BELLRINGER

Question 1

FVC/FEV1 for flow impairment

Answer 1

If under 70, look at FEV1 for severity
○ Normal = over 80%
○ Mild = 70-80%
○ Moderate = 60-69 %
○ Moderate severe = 50-59%
○ Severe = 35-49%
○ Very severe = 34 % and under

Question 2

FVC % predicted for volume impairment

Answer 2

Mild: 65-79%
Moderate: 50-64%
Severe: 49% and under

Question 3

150mls and 12% for bronchodilator significant change

Answer 3

12% AND 200mls in FEV1 OR FVC

Question 4

SVC & FVC Within 150mls to check for dynamic airway collapse

Answer 4

SVC-FVC = within 150mls for reproducibility

Question 5

TLC % predicted for hyperinflation

Answer 5

Mild: 121-130%
Moderate: 131-150%
Severe: 151% and over

Question 6

RV % predicted for gas trapping

Answer 6

Mild: 120-150%
Moderate: 151-250%
Severe: 251% and over

Question 7

TLC % predicted to confirm restriction

Answer 7

Mild: 79-65%
Moderate: 64-50%
Severe: 49% and under

Question 8

DLCO for diffusion defect

Answer 8

Mild: 74-60%
Moderate: 59-40%
Severe: 39% and under

Question 9

DLCO/VA to assess diffusion to lung volume ratio

Answer 9

Normal: over 81%
Low: 80% and under

Question 10

TLC - VA to assess total lung volume with communicating lung volume (hyperinflation)

Answer 10

Hyperinflation: 0.5L or more
No hyperinflation: difference b/w is under 0.5L

Question 11

Raw for airway resistance

Answer 11

Reduced: <65%
Increased: >177%