Sleep Exam

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Sleep Exam
2014-08-24 04:59:01

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
  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
  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%
  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
  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
  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
  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
  8. A device for storing an electric charge is:

    a.  a resistor
    b.  a transistor
    c.  a dipole
    d.  a capacitor
  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
  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
  11. A capnograph measures:

    a.  tidal volume of O2
    b.  end tidal CO2
    c.  arterial CO2
    d.  arterial pO2
  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
  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
  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
  15. Electrodes to monitor nocturnal myoclonus are placed on which leg muscle?

    a.  gastrocnemius
    b.  anterior tibialis
    c.  peroneus longus
    d.  iliotibial tract
  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
  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
  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
  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
  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
  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