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MSLT - MWT

MSLT - MWT. MSLT Protocol. Consider drug testing Should follow an overnight PSG 4 or 5 naps, 2 hours apart naps last 20 minutes, or 15 minutes after onset of sleep (longest can be 35 mins) unit of measure: minutes to sleep onset (stage 1) minutes to REM sleep onset (beginning with stage 1).

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MSLT - MWT

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  1. MSLT - MWT

  2. MSLT Protocol • Consider drug testing • Should follow an overnight PSG • 4 or 5 naps, 2 hours apart • naps last 20 minutes, or 15 minutes after onset of sleep (longest can be 35 mins) • unit of measure: • minutes to sleep onset (stage 1) • minutes to REM sleep onset (beginning with stage 1)

  3. MSLT Procedure

  4. MSLT Results Table

  5. Sleep Latency Data Plot

  6. Calculation of Mean Sleep Latency

  7. Sleepiness Index • Take total number of minutes of sleep latencies and subtract from 100 (if no sleep, the index is 0) • If only 4 naps are conducted, subtract total number of minutes of sleep latencies and subtract from 80. Divide the resulting number by 80 and multiply by 100.

  8. MSLT findings • Mean sleep latency • normal is > 10 minutes • 5-10 minutes is “gray zone” • <5 minutes is pathological sleepiness • REM-onset sleep periods • normal is < 2 • if there is only one, it is most likely to be in first nap • one SOREM obligates you to 5th nap or second SOREM

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