Spirometry Testing B

Question 1

What is the definition of a PEF or PEFR?

Answer 1

The maximum flowrate achieved during a forced expiratory maneuver

Question 2

What is a typical PEFR?

L/sec and L/min

Answer 2

10 L/sec or 600 L/min

Question 3

What is the significance of a PEFR?

Answer 3

Measures asthma severity

Measures gross changes in airway function before/after bronchodilator administration.

Question 4

If PEFR readings are consistently decreasing, this may indicate ___.

Answer 4

Fatigue

Question 5

What piece of equipment can be used to measure PEFR?

Answer 5

Wright Respirometer

Question 6

What is the definition of an FEF 200-1200?

Answer 6

The average flowrate that occurs during a forced expiratory maneuver after the first 200ml has been expired.

Question 7

What is the typical value of a FEF 200-1200?

Answer 7

6 L/sec

Question 8

What is the significance of a FEF 200-1200?

Answer 8

Measures airflow within large airways.

Question 9

What can you suspect if the patient has

a low FEF 200-1200?

Answer 9

Mechanical problems in the airways, such as tumors

Obstructive disease

Question 10

What the definition of a forced expiratory flow 25%-75%

Answer 10

Average flowrate during the middle half of a forced expiratory maneuver.

Question 11

What is the typical value of a FEF 25%-75%

Answer 11

4-5 L/sec

Question 12

What is the significance of

a FEF 25%-75%?

Answer 12

Measures flow within the small airways. Decreased with obstructive disease.

Question 13

What measurement is the most sensitive test to detect the presence of early small airway disease?

Answer 13

FEF 25%-75%

Question 14

When might the FEF 25%-75% may appear erroneously decreased?

Answer 14

If the FVC and FEV1 are greatly increased in post-bronchodilator study.

Question 15

What is an FEVT?

Answer 15

Forced Expiratory Volume/Time

Question 16

What is the definition of an FEV1?

Answer 16

Volume of gas expired over 1 second.
(None: FEVT is the same as FEV1. The “T” in FEVT indicates the amount of time in seconds. So FEV 0.5 is FEV in 0.5 seconds.)

Question 17

What is the significance of an FEV1? (x2)

Answer 17

Shows decreased flow that could indicate obstructive disease.
Measures degree of improvement after bronchodilator administration

Question 18

How long should you wait before administering a bronchodilator before re-testing the FEV1?

Answer 18

10-15 min

Question 19

How do you calculate the FEVT from a graph?

Answer 19

Expiratory value at 1 sec - inspiratory value at 2 sec.

Question 20

What is the definition of FEVT/FVC%?

Answer 20

The forced expiratory volume for a given time interval expressed as a percentage of (or compared to) the vital capacity.

Question 21

What is the minimum acceptable value for an FEV1/FEC%?

Answer 21

70%

Question 22

What is the minimum acceptable value for an FEV3/FEC%?

Answer 22

97%

Question 23

What is the significance of an FEVT/FVC%?

Answer 23

It’s decreased with obstructive disease and normal with restrictive disease (even in the presence of a decreased VC and/or decreased FEV1)

Question 24

How do you calculate an FEV1/FEC%?

Answer 24

Divide the FEV1 by the FEC, then multiply by 100 to get a percentage.

Question 25

What is MVV an abbreviation for?

Answer 25

Maximum Voluntary Ventilation

Question 26

What is the definition of an MMV?

Answer 26

Largest volume of air inhaled and exhaled over a 12 second (minimum) period.

Question 27

How is an MMV reported?

Answer 27

The MMV data is extrapolated to 1 minute and reported in liters per minute, corrected to BTPS.

Question 28

What is a typical MMV value?

Answer 28

170 L/min

Question 29

What is the significance of an MMV? (x3)

Answer 29

Gives information about: 1. Compliance of lungs and thorax 2. Airway resistance 3. Respiratory muscle status

Question 30

How do you do an MMV?

Answer 30

Ask patient to breathe into a spirometer as deeply and rapidly as possible for a minimum of 12 seconds.

Question 31

What is the formula for determining MMV?

Answer 31

#breaths x volume x 5 x temperature correction factor

Question 32

While performing the MVV with the Collins (water seal) spirometer, the bell should be in the ___ position so the patient can ___ .

Answer 32

Mid-position | Inhale and exhale

Question 33

When is the only time that MVV is diagnostically significant?

Answer 33

When there are large reductions in values (indicates severe obstructive disease)

Question 34

How do you estimate effort with the MVV?

Answer 34

Multiply FEV1 by 35. If MVV is less than that value, suspect poor effort.

Question 35

If MVV is 55% of predicted with a normal FEV1, what shoudl you suspect?

Answer 35

That the patient gave a poor effort.

Question 36

If a patient has a low tidal volume and a fast respiratory rate during the MVV procedure, what should you suspect?

Answer 36

Restrictive lung disease.

Question 37

The FEV6 is sometimes used as a | surrogate for the ___. Why?

Answer 37

FVC. | More reproducible than the FVC and less physically demanding.