Test 1 PSG Flashcards
Which of the following Usa function of a differential amplifier?
A . To record the differences in the voltages of two inputs.
B. To record the differences in the voltages of the active input and ground.
C. To record the differences in the voltages if an exploring electrode and the patient ground connection.
D. To record only identical voltage reviewed by its two inputs.
A. To record the differences in the voltages of two inputs.
If G1 receives an input of ~50uv and G2 simultaneously receives an input of + 50 uv, the signal output will equal
A. 0
B. -100uv
C. +100 uv
D. -50 uv
B. -100uv
G1-G2
- 50 - +50uv
- 50 - 50 = -100uv
If G1 receives an input of - 100 uv and G2 simultaneously receives an input of -50 uv, the output voltage will equal
A. -50 uv
B. + 50 uv
C. -150 uv
D. +150 uv
A. -50uv
G 1-G2
- 100uv - - 50uv
- 100 + 50 = -50 uv
An appropriate EEG sin setting is
A. 5uv/mm
B. 5uv/ cm
C. 50 V/ cm
D. A and C are both correct
D. A and. c are both correct
The frequency of a waveform can be altered by changing the
A. Sensitivity setting
B. Filters
C. Color
D. Paper speed
B. Filters
Changing the sensitivity setting from 20 uV / mm to 40 uV/mm will do what to the appearance of the wave?
A. Double the width of the wave
B. Cut The width of the wave in half
C. Double the height of the wave
D. Cut the height of the wave in half
D. Cut the height of the wave in half
Which of these is the best HFF setting for a respiratory channel?
A. 0.5 HZ
B. 1.0HZ
C. 5.0 HZ
D. Off
C. 5.0 HZ
Which of the following is best solution for disinfecting electrodes? A bleach B antibacterial soap C acetone D alcohol
A bleach
3) in addition to EEG, EOG, EMG, (submental) monitoring, what is crucial for the interpretation of a Polysomnographic recording in infants?
A. Body temperature
B. Behavior and observation
C. Physiological calibrations
D. Limb movement (EMG) channel
B. Behaviors and observation
2) the initial recording equipment calibration for Polysomnography should show
A) 50uv signal introduce to all channels regardless of filters settings
9) an alternating EEG pattern seen in full term sleeping (NREM) infants consisting of both high and low voltage activity is termed
C. Trace alternant
The minimum study duration for an accurate assessment of neonatal sleep is
B ) 2hrs and or 1 feeding
The EEG is recorded during sleep for the following reasons except:
B) to record bradycardia, extrasystoles, and or prences of a systole
19) if abnormal EEG waveforms appear during the PSG, the paper speed should be changed to?
30 mm/sec
20) why should backup recording electrodes be placed on the patient?
C. To prevent waking the patient to reapplying electrodes
21) the standard chart or paper speed for PSG is:
10 mm/sec
24). Short time constants should be used when recording which of the following physiologic variables?
C. EMG
Out of phase signals in LOC. A 2. ROC A 1 derivations indicate
C. Eye movement
35 During instrumentation calibration, one pen deflection lagging behind the others requires correction of the
Time axis
36) REM periods become shorter and less intense throughout the sleep period
B false
What is the best method to eliminate 60hz artifact ?
Common mode rejection
BIPAP actually assist a pt breathing , similar to
Mechanical ventilAtion
If using a transcutaneous monitor CO 2 , be attentive to any –_ In CO2 be attentive to
Any increase in CO 2
MSLT
Naps
Duration
__ hrs
4 naps appropriate if
4-5 naps
Duration 20min
Hrs. 2 apart
4 naps REM occurs 2 of the 4 naps
MSLT
Rm should be
First nap begins
1.5-2 hrs after the overnight study has concluded
MSLT 4 hr nap unreliable for narcolepsy unless
Pt has 2 REM. In the 4 hr nap
Cancel MSLT if split night study,
If total sleep time less. Than
If total sleep that Is less than 6 hrs
End MSLT
No sleep after 20 min
After 15 min of continuos monitoring following sleep onset
MSLT
Sleep
Sleep questionnaire is filled out before and after. N
