Deck 13: Reference Values and Interpretation Strategies

Question 1

All of the following should be considered when selecting a reference set for your laboratory except:

A) Population
B) Testing protocol
C) Instrumentation
D) Percent predicted

Answer 1

D

Question 2

After completing a single-breath diffusing capacity,which of the following comments would assist with the interpretation process?

A) Four trials were completed after several false starts.
B) The VC was performed an hour before the DLCO.
C) The exhalation time was 2 seconds.
D) Was unable to achieve an IVC at 85% of the SVC.

Answer 2

D

Question 3

The following results are obtained on a 35-year-old Caucasian female: FVC 3.40 L
FEV₁ 2.04 L
What should the technologist do next?

A) Report the results.
B) Perform an exercise evaluation.
C) Administer a bronchodilator.
D) Recommend pulmonary rehabilitation.

Answer 3

C

Question 4

Which of the following predicted sets is recommended for use in North America for spirometry?

A) ECCS
B) ATS
C) NHANES III
D) ERS 1993

Question 5

The following pulmonary function results were reported for a 25-year-old female. Measured Predicted
FVC (L) 3.00 4.00
FEV₁ 1.60 3.20
TLC 4.00 5.00
These results are consistent with a(n):

A) Obstructive process
B) Restrictive pattern
C) Extrathoracic lesion
D) Mixed pattern

Question 6

The following pulmonary function results were obtained on a patient with asthma: Measured Predicted
FEV₁ 1.0 L 2.0 L
FVC 2.5 L 2.6 L
The results are consistent with _____ obstruction.

A) Moderate
B) Moderately severe
C) Severe
D) Very severe

Question 7

Spirometry has been ordered for a 30-year-old male.The technologist should select the spirometry predicted reference set by asking the:

A) Patient's race
B) Weight
C) Height
D) Body surface area

Question 8

The following pulmonary function results were obtained: TLC 5.0 L 130% predicted
DLCO 14.0 55% predicted
FEV₁ 2.0 L
FVC 3.5 L
The results are consistent with:

A) Interstitial lung disease
B) Emphysema
C) Asthma
D) Neuromuscular disease

Question 9

The following pulmonary function results were obtained on a patient with COPD: Measured Predicted
FEV₁ 1.0 L 4.0 L
FVC 3.5 L 5.0 L
The results are consistent with _____ obstruction.

A) Moderate
B) Moderately severe
C) Severe
D) Very severe

Question 10

Which of the following tests are indicated when the DLCO is less than 60% of predicted?

A) Lung volumes
B) Exercise assessment
C) MIP/MEP
D) Spirometry

Question 11

The following pulmonary function results were reported for a 25-year-old female. Measured Predicted
FVC (L) 3.00 4.00
FEV₁ 1.60 3.20
TLC 5.50 5.00
These results are consistent with a(n):

A) Obstructive process
B) Restrictive pattern
C) Extrathoracic lesion
D) Mixed pattern

Question 12

Which of the following variables is used to determine the presence of obstruction in spirometry measurements?

A) FEF_25%-75%
B) FEV₁/FVC%
C) PEF
D) FEV₁

Question 13

An individual with asthma has the following FEV₁ results: Pre-bronchodilator FEV₁ 3.25 L
Post-bronchodilator FEV₁ 3.50 L
These results are consistent with a _____ response.

A) Positive
B) False-negative
C) False-positive
D) Negative

Question 14

When interpreting lung function measurements,which test should the technologist recommend if the FEV₁/FVC% and VC are reduced?

A) Lung volumes
B) MIP/MEP
C) Six-minute walk
D) Airway resistance

Question 15

For Asian subjects,one should multiply the predicted FEV₁ and FVC by which of the following correction factors?

A) 0.25
B) 0.75
C) 0.88
D) 1.15

Question 16

The following pulmonary function results were obtained: TLC 3.0 L 70% predicted
DLCO 12.0 55% predicted
FEV₁ 2.0 L
FVC 2.3 L
The results are consistent with:

A) Interstitial lung disease
B) Emphysema
C) Asthma
D) Neuromuscular disease

Question 17

The technologist records the demographic information for a 40-year-old performing lung volume measurements.An error in which of the following variables will have the greatest influence on the predicted value?

A) Sex
B) Race
C) Height
D) Weight

Question 18

A 5-year-old Caucasian child performs spirometry in the pulmonary function laboratory.The technologist should select which reference set?

A) NHANES III
B) Polgar
C) ERS 1993
D) Weng

Question 19

A 25-year-old male who is 72 inches tall has the following spirometry results: These findings show the presence of which of the following?

A) Normal lung function
B) Severe obstructive disease
C) Reversible airway obstruction
D) Incorrectly selected predicted values

Question 20

A 20-year-old female completes a spirometry test with the following data: Measured Predicted LLN
FVC (L)3.00 3.50 3.10
FEV₁ (L)2.50 2.80 2.70
Based on the age of the patient and spirometry results,which of the following is possible if a fixed percent is used for the interpretation of the spirometry results?

A) False-negative result
B) False-positive result
C) True-negative result
D) True-positive result