EXAM QUESTIONS AND WELL ELABORATED ANSWERS
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Which of these factors does not tend to increase impedances?
a. Increased site preparation
b. Broken/faulty wires
c. Dirty electrodes
d. Poor application - Answer-increased site preparation
Which of these does not tend to increase leakage current?
a. Shorter power cords
b. Power strips
c. Battery backups
d. Parallel placement of wires - Answer-shorter power cords
The most important reason for performing a MWT is to:
a. Calculate the total sleep time over 5 nap opportunities
b. Differentiate narcolepsy form idiopathic hypersomnia
c. Measure the patient's ability to resist the urge to fall asleep
,d. Predict the need for administering stimulant medicaiton - Answer-
Measure the patient's ability to resist the urge to fall asleep
The technologist performs physiological calibrations in order to:
a. assess the function of the computer keyboard.
b. assess the function of the electrical bed.
c. verify electrode response to commands.
d. verify the polarity of the electrocardiogram (ECG). - Answer-c. verify
electrode response to commands.
A pattern of cardiac variability often seen in patients with OSA is:
A.
Persistent Tachycardia
B.
Persistent bradycardia
C.
Tachycardia alternating with bradycardia
D.
Prolonged QT interval - Answer-Tachycardia alternating with
bradycardia
The recording of eye movements is based on:
,a. Muscle activity produced by the right and left outer canthus
b. Voltages from the frontal EEG's
c. The electrical potential difference between the cornea and the retina
d. The electrical potential difference between the right eye and the left
eye - Answer-The electrical potential difference between the cornea
and the retina
The failure to remove electrode paste residue will MOST likely result in:
a. discarded electrodes.
b. enhanced artifact.
c. improved detergent selection.
d. improvement in adherence. - Answer-enhanced artifact
The most appropriate action a technologist would take when there is
confirmed ventricular tachycardia lasting greater that 30 seconds is:
a. Initiate emergency response system
b. Assess, document and continue to monitor
c. No immediate response is needed
d. Discontinue recording and transport to emergency room - Answer-
Initiate emergency response system
The polysomnograph has a leakage current of 200uA. What should the
technician do about this?
a. Plug the equipment into an ungrounded plug to avoid a ground loop.
, b. Do not use the equipment until the leakage current is lowered.
c. Continue to record since this leakage current is within acceptable
limits.
d. Use an extra grounding electrode on the patients - Answer-Do not
use the equipment until the leakage current is lowered.
Which of the following conditions are most likely to cause slow wave
artifact in the EEG and EOG channels?
a .Muscle tension
b. Sweat
c. Incorrect placement of the reference electrodes
d. A and C are correct - Answer-sweat
The electrode located 30% above the left pre-auricular crease is:
C3
P3
01
F3 - Answer-c3
CO2 monitoring, using either end-tidal or transcutaneous sensors, is
mandatory in children for the scoring of:
A.
Apnea