Post-test Review A Flashcards
In nitrogen washout, you need to replace the O2 tank if the tank is at ___ psi or less.
50
If a body box is measuring inaccurate airway resistance and thoracic gas volume, suspect a problem with the ___.
Box pressure transducer
How do you calibrate a box pressure?
Use a sine-wave rotary pump
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.
Tighten the belt. (This was on the test!)
Automatic (This was on the test too!)
What do you use to disinfect non-disposable EKG electrodes?
Alcohol
On the electrocardiograph, 1 millivolt (mv) produces a ___ mm vertical deflection.
The speed of the recording should be ___ mm per second.
10 mm
25 mm
What types of material are used to use glutaraldehyde on?
Use it on this piece of medical equipment:
Disposable plastics
Use for flexible fiberoptic bronchoscopes.
What chemical is used to clean up spilled blood?
Bleach
If MDI’s are used and the mouthpieces have to be cleaned, what should you use to clean them?
Activated glutaraldehyde
No smoking for ___ hours before your PFT test!
1 hour
All spirometry values are recorded in (ATPS or BTPS), then corrected to (ATPS or BTPS).
Recorded in ATPS
Corrected to BTPS
When you’re reading an FVC from a graph, you have to change from ATPS to BTPS. How do you do that?
Multiply by 1.075
To consider a bronchodilator treatment significant, the FEV1 must improve by __% and __ Liters.
12% and 0.2 Liters
Large increases in FVC following bronchodilator administration may cause the ___ and the ___ to decrease.
FEV1/FVC% and the FEF 25%-75%
What is the youngest age that a spirometry test can be performed?
5 years old
What is a normal Gaw?
0.42-1.67 L/sec/cm H2O
Modified Allen’s Test: After releasing the ___ artery, the hand should turn pink within ___ seconds.
Releasing the ulnar artery
Pink within 2 seconds.
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)
PaCO2 will be high
PaO2 will be high
pH will be low.
Do capillary blood sticks don’t correlate with arterial blood?
No
If there is an air bubble in an ABG sample, what happens to the sample?
PaCO2 decreases toward zero
PaO2 moves toward 150
pH increases
(This is the only abnormality where the pH increases)
If the ABG sample is improperly cooled (not iced), what happens to the sample?
PaCO2 increases
PaO2 decreases
pH decreases
(This is the only abnormality where the PaCO2 increases)
If the ABG sample has too much heparin, what happens to the sample?
PaCO2 decreases toward zero
PaO2 moves toward 150
pH decreases toward 7.0
If the ABG sample contains flush solution dilution, what will happen to the sample?
PaCO2 decreases
PaO2 increases
pH decreases
Why are ABG results in CO poisoned patients misleading?
What equipment should you use for an ABG?
ABG results will be misleading because SaO2 is calculated.
Use a co-oximeter (hemoximeter)
Patients get methemoglobinemia from ___ poisoning.
Don’t use a ___ to measure an ABG.
Nitrate poisoning
Don’t use a co-oximeter.
Normal levels of COHb:
If the patient smokes, normal levels are:
0-2%
5-10%
How do you evaluate oxygenation in a patient with CO poisoning, methemoglobin, or other forms of non-functional hemoglobin?
Co-oximetry
Remember, co-oximetry is invasive and non-continuous!
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.
100%
If ETCO2 is displayed as a percent, what is a normal reading? (it’s not 35-45%)
3-5%
What is a correction factor?
It’s a number used to compensate for errors of measurements.
How do you calculate a correction factor?
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.)
When calibrating with a 3 liter syringe, accuracy must be plus or minus ___ percent.
The range must be between ___ and ___ liters.
Plus or minus 3.5%
2.895 - 3.105 liters
When calibrating the body box, the volume measured should be plus or minus ___% of the actual volume.
+ or - 5%
What is the maximum amount of acceptable extrapolated volume? (in liters and percent)
0.15 liters (150 ml) or 5%
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.
0.15 liters
8
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.
5%
150 ml
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.
100
5% or 0.150 liters
MVV attempts last at least ___ seconds.
You should get at least ___ acceptable efforts on the MVV and they must be within ___ of each other.
12 seconds
2
10%
