CPSGT TEST QUESTIONS|LATEST VERSION |NEW
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A - ANSWER The E2 electrode is placed out and up the outer canthus of the right eye, and E1 is
placed out and down from the outer canthus of the left eye. If the E2 channel on the
polysomnograph is channel 4 and E1 is channel 5, what will the waves on these channels do
when the patient looks up?
A. Move toward each other
B. Both move up
C. Both move down
D. Move away from each other
B - ANSWER What is the purpose of the low-frequency filter?
A. Eliminating undesired fast frequencies
B. Eliminating undesired slow frequencies
C. Adjusting signal amplitude
D. Calibrating DC amplifiers
B - ANSWER What should a technician do first to make sure the proper test is being performed?
A. Contact the physician
B. Review the chart for the physician's order
C. Ask the patient for a CC
D. Perform physiological calibrations.
A - ANSWER The symbol "G1" represents
A. The exploring electrode
B. The reference electrode
,C. The patient ground
D. The output of a differential amplifier to the PSG
A - ANSWER If G1 receives a signal of -100 uV at the same time G2 receives a signal of -50 uV,
what is the output signal?
A. -50
B. +50
C. -150
D. +150
A - ANSWER Which of the following is a process performed by a differential amplifier?
A. Recording the differences in the voltages of two outputs
B. Recording the differences in the voltages of the active input and ground
C. Recording the differences in the voltages of an exploring electrode and the patient ground
connection
D. Recording only identical voltages received by its two inputs
A - ANSWER If G1 and G2 simultaneously receive an input od 50uV, what is the output signal?
A. 0
B. +100
C. +100
D. -50
A - ANSWER The frequency of an EEG signal
A. Can be determined by counting the number of waveforms recorded during 1 second
B. Can be deterem8ined by counting the number of waveforms recorded during one epoch
C. Cannot be determined without using a water column manometer
D. Depends on the paper speed
,D - ANSWER How is the amplitude of wave determined?
A. By reading the sensitivity setting on the PSG
B. By comparing the relative height of the sleep waveforms against the patients awake EEG
C. By comparing the height of the patient's EEG slow waves to the patient's alpha waves
D. By comparing the height of the waveform against a calibration signal of known value
A - ANSWER The purpose of a high frequency filter is
A. To attenuate undesirable fast frequencies
B. To attenuate undesirable slow frequencies
C. To elimate undesirable DC voltages from the signal output
D. B and C are both correct
C - ANSWER In PSG, what is the sensitivity setting?
A. The offset between the electrical and the mechanical baselines
B. The ratio of pen response to the settings of the low- and high-frequency filter settings
C. The ratio of input signal voltage to the amplitude of the pen deflection
D. The ratio of input signal voltage to the voltage of the calibration signal
A - ANSWER An appropriate sensitivity setting for an EEG channel is:
A. 5-7 uV/mm
B. 10-12 uV/mm
C. 20 uV/mm
D. 10-100uV/mm
B - ANSWER Amplitude is a measure of
A. Impedance
, B. Voltage
C. Current
D. Resistance
C - ANSWER Adjusting the sensitivity from 5 uV/mm to 10 uV/mm will
A. Double the pen deflection
B. Increase the pen deflection by five times
C. Reduce the pen deflection by one-half
D. Reduce the pen deflection by five times
B - ANSWER The standard paper speed used for a sleep study is
A. 30 mm/sec
B. 10 mm/sec
C. 5 mm/sec
D. 1 mm sec
C - ANSWER Which of the following filter settings would be most appropriate for EEG channels
on a sleep study?
A. LFF = 10Hz, HFF = 100 Hz
B. LFF = 1 Hz, HFF = 30 Hz
C. LFF = 0.3 Hz, HFF = 30 Hz
D. LFF = 0.1 Hz, HFF = 0.5 Hz
A - ANSWER Which of the following filter settings are the most appropriate for recording EMG
channels?
A. LFF = 10Hz, HFF = 100 Hz
B. LFF = 1 Hz, HFF = 30 Hz
C. LFF = 0.3 Hz, HFF = 30 Hz
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