Post-test Review A

Question 1

In nitrogen washout, you need to replace the O2 tank if the tank is at ___ psi or less.

Answer 1

50

Question 2

If a body box is measuring inaccurate airway resistance and thoracic gas volume, suspect a problem with the ___.

Answer 2

Box pressure transducer

Question 3

How do you calibrate a box pressure?

Answer 3

Use a sine-wave rotary pump

Question 4

Exercise testing: If the treadmill belt stops moving when the patient takes a step, what should you do?
It’s best to use a (manual or automatic) BP cuff on an exercising patient.

Answer 4

Tighten the belt. (This was on the test!)

Automatic (This was on the test too!)

Question 5

What do you use to disinfect non-disposable EKG electrodes?

Answer 5

Alcohol

Question 6

On the electrocardiograph, 1 millivolt (mv) produces a ___ mm vertical deflection.
The speed of the recording should be ___ mm per second.

Answer 6

10 mm

25 mm

Question 7

What types of material are used to use glutaraldehyde on?

Use it on this piece of medical equipment:

Answer 7

Disposable plastics

Use for flexible fiberoptic bronchoscopes.

Question 8

What chemical is used to clean up spilled blood?

Answer 8

Bleach

Question 9

If MDI’s are used and the mouthpieces have to be cleaned, what should you use to clean them?

Answer 9

Activated glutaraldehyde

Question 10

No smoking for ___ hours before your PFT test!

Answer 10

1 hour

Question 11

All spirometry values are recorded in (ATPS or BTPS), then corrected to (ATPS or BTPS).

Answer 11

Recorded in ATPS

Corrected to BTPS

Question 12

When you’re reading an FVC from a graph, you have to change from ATPS to BTPS. How do you do that?

Answer 12

Multiply by 1.075

Question 13

To consider a bronchodilator treatment significant, the FEV1 must improve by __% and __ Liters.

Answer 13

12% and 0.2 Liters

Question 14

Large increases in FVC following bronchodilator administration may cause the ___ and the ___ to decrease.

Answer 14

FEV1/FVC% and the FEF 25%-75%

Question 15

What is the youngest age that a spirometry test can be performed?

Answer 15

5 years old

Question 16

What is a normal Gaw?

Answer 16

0.42-1.67 L/sec/cm H2O

Question 17

Modified Allen’s Test: After releasing the ___ artery, the hand should turn pink within ___ seconds.

Answer 17

Releasing the ulnar artery

Pink within 2 seconds.

Question 18

If you get an ABG on a patient who has hypothermia, the PaCO2 will be erroneously (high or low)
The PaO2 will be erroneously (high or low)
The pH will be erroneously (high or low)

Answer 18

PaCO2 will be high
PaO2 will be high
pH will be low.

Question 19

Do capillary blood sticks don’t correlate with arterial blood?

Answer 19

No

Question 20

If there is an air bubble in an ABG sample, what happens to the sample?

Answer 20

PaCO2 decreases toward zero
PaO2 moves toward 150
pH increases
(This is the only abnormality where the pH increases)

Question 21

If the ABG sample is improperly cooled (not iced), what happens to the sample?

Answer 21

PaCO2 increases
PaO2 decreases
pH decreases
(This is the only abnormality where the PaCO2 increases)

Question 22

If the ABG sample has too much heparin, what happens to the sample?

Answer 22

PaCO2 decreases toward zero
PaO2 moves toward 150
pH decreases toward 7.0

Question 23

If the ABG sample contains flush solution dilution, what will happen to the sample?

Answer 23

PaCO2 decreases
PaO2 increases
pH decreases

Question 24

Why are ABG results in CO poisoned patients misleading?

What equipment should you use for an ABG?

Answer 24

ABG results will be misleading because SaO2 is calculated.

Use a co-oximeter (hemoximeter)

Question 25

Patients get methemoglobinemia from ___ poisoning. | Don't use a ___ to measure an ABG.

Answer 25

Nitrate poisoning | Don't use a co-oximeter.

Question 26

Normal levels of COHb: | If the patient smokes, normal levels are:

Answer 26

0-2% | 5-10%

Question 27

How do you evaluate oxygenation in a patient with CO poisoning, methemoglobin, or other forms of non-functional hemoglobin?

Answer 27

Co-oximetry | Remember, co-oximetry is invasive and non-continuous!

Question 28

When using a co-oximeter, you can add up all Hb saturations. If they don't add up to ___%, then the co-oximeter isn't working right.

Answer 28

100%

Question 29

If ETCO2 is displayed as a percent, what is a normal reading? (it's not 35-45%)

Answer 29

3-5%

Question 30

What is a correction factor?

Answer 30

It's a number used to compensate for errors of measurements.

Question 31

How do you calculate a correction factor?

Answer 31

Average all the readings, then divide by the correct number. (ex: For a 3 liter (3000 ml) syringe, if your readings are 3070, 3080, and 3090, then divide them by three to get the average, which is 3080. Then divide that by 3000 to get the correction factor.)

Question 32

When calibrating with a 3 liter syringe, accuracy must be plus or minus ___ percent. The range must be between ___ and ___ liters.

Answer 32

Plus or minus 3.5% | 2.895 - 3.105 liters

Question 33

When calibrating the body box, the volume measured should be plus or minus ___% of the actual volume.

Answer 33

+ or - 5%

Question 34

What is the maximum amount of acceptable extrapolated volume? (in liters and percent)

Answer 34

0.15 liters (150 ml) or 5%

Question 35

Repeatability criteria: Two largest FVC's and two largest FEV1's must be within ___ liters of each other. If that criteria is not met, continue until a maximum of ___ efforts have been performed.

Answer 35

0.15 liters | 8

Question 36

The two best FVC tests should be within ___ per cent or ___ mL of each other. Report the highest FVC measured, regardless of which test generated it.

Answer 36

5% | 150 ml

Question 37

End-expiratory level of three breaths before the SVC maneuver must not vary by more than ___ ml. At least two acceptable maneuvers should be within ___% or ___ liters.

Answer 37

100 | 5% or 0.150 liters

Question 38

MVV attempts last at least ___ seconds. | You should get at least ___ acceptable efforts on the MVV and they must be within ___ of each other.

Answer 38

12 seconds 2 10%