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Polysomnographic Recording Procedures
KAREN I. SMITH
NOTE: This chapter corresponds to Chapter 30 in Fundamentals of Sleep Technology, 2nd edition.
1. The basic requirements for obtaining high-quality polysomnogram recordings include accurate signal processing, conscientious maintenance of the recording, and:
A. Proper electrode and sensor application
B. Use of collodion to secure the electrode to the scalp
C. Minimum analog-to-digital conversion rate of 1 GHz
D. Use of a 60 Hz notch filter with sharp drop-off
2. Electrode application is the first step toward obtaining an artifact-free polysomnogram. This requires precise head measurement, site preparation, high-quality electrodes, secure adhesion, and:
A. Sufficient skin abrasion to produce a small amount of blood
B. Use of alcohol wipes on the earlobes
C. Electrode impedances less than 5 kΩ
D. Velcro straps to bundle wires together
3. The arrangement of the recording channel selection and their settings is called a:
A. Derivation
B. Diagnostic set
C. Montage
D. Reference electrode position
4. To ascertain the correct montage for a recording:
A. Allow the PSG system to use its default
B. Review the physician’s order
C. Select each channel you prefer
D. Delete the unnecessary channels
5. Bio-calibration assesses:
A. The ability for the patient to hear through the audio system
B. Impedance levels
C. The proper physiologic response in each channel
D. The patient’s awake status prior to “lights out”
6. The most common reason patients undergo overnight polysomnography is to diagnose:
A. Insomnia
B. Sleep-related breathing disorders (SRBD)
C. Narcolepsy
D. Parasomnias
7. If a patient requests early termination of the study, the first response of the technologist should be:
A. To ignore the patient’s request the first and second time it is made
B. To terminate the study immediately and discharge the patient
C. To make a reasonable attempt to get the patient to stay
D. To offer to remove only the respiratory sensors
8. The sleep technologist performing a polysomnogram is responsible for monitoring the data as they are recorded, making appropriate adjustments and corrections to the signals, and:
A. Providing a preliminary evaluation of the study to the patient in the morning
B. Degaussing the amplifiers after the study
C. Replacing electrodes and sensors that have been dislodged
D. Making sure each patient has at least two electrical ground wires attached
9. Most modern recording systems record and store:
A. Each electrode referenced to linked mastoid electrodes
B. Recordings only as they appear to the technologist
C. Recordings only as specified by the interpreting physician
D. Each electrode recorded against a system reference
10. The filter that attenuates low frequencies but allows high frequencies to pass is:
A. A notch filter
B. A high-frequency filter (HFF)
C. A low-frequency filter (LFF)
D. A band-pass filter
11. Artifacts detected during the biologic calibration:
A. Should be corrected prior to starting the study
B. Usually do not affect the integrity of the study
C. Should be corrected when the patient awakens
D. Typically resolve on their own and no action is needed
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