# Sleep Exam

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1. If the distance from pre-auricular point to pre-auricular point is 34.0 centimeters, the T3 electrode is placed _____ centimeters up from the pre-auricular point.

a.  34.0 centimeters
b.  3.4 centimeters
c.  6.8 centimeters
d.  17.0 centimeters
B
2. A differential amplifier is used to record all of the following except:

a.  electro-oculogram
b.  electrocardiogram
c.  galvanic skin response
d.  muscle activity
C
3. The time constant is defined as the time in seconds it takes for a square wave to decay to _____ of its initial amplitude.

a.  40%
b.  63%
c.  50%
d.  37%
D
4. Slow rolling eye movements occurring during stage 1 sleep will best be seen at a low filter setting of:

a.  1.0 Hz
b.  0.3 Hz
c.  0.1 Hz
d.  5.0 Hz
C
5. EMG activity from the leg muscle is best recorded at a high frequency filter setting of:

a.  15 Hz
b.  30 Hz
c.  50 Hz
d.  90 Hz
D
6. A slow wave is measured at 15 mm peak to peak.  The sensitivity is 5 V/mm.  The amplitude of this slow wave is:

a.  50 V
b.  75 V
c.  100 V
d.  125 V
B
7. Impedances of electrodes should be _____ and the impedances of the amplifiers should be _____.

a.  low, low
b.  low, high
c.  equal, low
d.  high, high
B
8. A device for storing an electric charge is:

a.  a resistor
b.  a transistor
c.  a dipole
d.  a capacitor
D
9. The time constant (T) is best expressed by which of the following equations (R=resistance, C=capacitance, I=current, W=power)?

a.  T = R/I
b.  T= IR
c.  T = WC
d.  T = RC
D
10. The purpose of calibration is to:

a.  assure proper vertical pen alignment
b.  assure proper amplification in each channel
c.  assure proper pen damping
d.  all of the above
D
11. A capnograph measures:

a.  tidal volume of O2
b.  end tidal CO2
c.  arterial CO2
d.  arterial pO2
B
12. Thermistors are devices that record airflow by:

a.  relative changes in air temperature
b.  temperature of inspired air only
c.  temperature of expired air only
d.  none of the above
A
13. Strain gauges for monitoring nocturnal penile tumescence (NPT) are made of silastic tubing filled with:

a.  insulated wire
b.  salt solution
c.  toluene
d.  mercury
D
14. A paper speed of 6 mm/second would be useful in demonstrating all of the following except:

a.  periodic breathing
b.  myoclonus
c.  EKG abnormality
d.  REMs
C
15. Electrodes to monitor nocturnal myoclonus are placed on which leg muscle?

a.  gastrocnemius
b.  anterior tibialis
c.  peroneus longus
d.  iliotibial tract
B
16. Which of the following monitoring parameters would be least helpful in evaluating a patient for nocturnal seizures?

a.  leg EMG
b.  EOG
c.  EKG
d.  ERG
D
17. In patients suspected of having sleep apnea, it is essential to monitor all of the following variables except:

a.  SaO2
b.  EKG
c.  respiratory effort
d.  leg EMG
D
18. In order to maximize the voltages recorded during all night polysomnography, which type of montage should be used?

a.  referential using average reference
b.  A-P bipolar
c.  referential using contralateral ear reference
d.  transverse bipolar
C
19. All of the following are causes of 60 Hz interference except:

a.  high impedance
b.  electrically noisy environment
c.  poor electrode contact
d.  dissimilar electrode metals
D
20. Which of the following high filter settings is best for recording the mental/submental EMG in the polysomnogram?

a.  15 Hz
b.  30 Hz
c.  60 Hz
d.  90 Hz
D
21. Endoesophageal pressure measurements would be most helpful in evaluating which sleep disorder?

a.  sleep apnea syndrome
b.  narcolepsy
c.  sleep-related asthma
d.  gastroesophageal reflux
A
 Author: madali03 ID: 281210 Card Set: Sleep Exam Updated: 2014-08-24 08:59:01 Tags: Sleep Folders: Description: Sleep Exam Show Answers: