Sleep Exam

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madali03
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281210
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Sleep Exam
Updated:
2014-08-24 04:59:01
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Sleep
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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

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