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Sleep Boards > Polysomnography > Flashcards

Polysomnography Flashcards

1
Q

Minimum amplitude to records a leg movement above resting

A

8uV

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2
Q

Low and High Frequency Filter settings for EEG

A

0.03 and 35 Hertz

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3
Q

Notch Filter setting

A

60 Hertz

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4
Q

Recommended impedance setting

A

5 Ohms

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5
Q

Alpha activity is best seen in what leads

A

Occipital leads

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6
Q

Low and High Frequency Filter settings for EMG and snoring

A

10 and 100 Hertz

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7
Q

Low and High Frequency Filter settings for EKG

A

0.3 to 70 Hertz

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8
Q

E2 and E1 placement

A

E2 goes above right eye
E1 goes below left eye

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9
Q

Bruxism guidelines in PSG

A

Brief elevations of masseter EMG activity of 0.25-2 seconds duration in a sequence of 3 or more.

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10
Q

Minimum length of chin tone increase to score an arousal during REM

A

1 second

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11
Q

Wakefulness wavelength

A

Beta waves 15-60Hz

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12
Q

Sleepiness wavelength

A

Alpha Waves 8-12 Hz

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13
Q

N1 wavelength

A

Theta waves 3-7Hz

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14
Q

N3 wavelength

A

Delta waves 0.5-2Hz

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15
Q

N1 % in normal adult

A

1-5%

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16
Q

N2% in normal adult

A

45-55%

17
Q

N3% in normal adult

A

3-15%

18
Q

REM% in normal adult

A

20-25%

19
Q

What stage is “low amplitude mixed frequency” and what are the frequencies

A

Beta and Theta, stage 1

20
Q

Oronasal thermistor is best suited to identify ______

A

apneas

21
Q

Nasal pressure transducer is best suited to identify _____

A

hypopneas

22
Q

Gold standard method to monitor respiratory effort

A

esophageal manometry

23
Q

What is REM sleep density

A

Qualitative number of phasic eye movements

24
Q

Cheyne Stokes criteria
- how many times in a row minimum
- minimum cycle length
- CAI number

A

Crescendo decrescedo breathing pattern 3 straight times
Cycle length > 40 seconds
> 5 central apneas

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