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Multiple Sleep Latency Testing

The multiple sleep latency testing (MSLT) is done immediately following your overnight sleep study and is used to evaluate your degree of daytime sleepiness. 

After you wake up, we'll remove some of the sensors and give you time to relax. The test consists of five naps scheduled throughout the day separated by 2-hour breaks.

If your overnight study shows evidence of a sleep disorder, your MSLT may be canceled or shortened. Your primary care provider should have the results of your sleep studies in two to three weeks.

Your MSLT Checklist

Please bring the following items:

  • Sleep diary filled out for 2 weeks
  • Comfortable, loose fitting clothes
  • Entertainment items (books, magazines, DVDs, laptop/tablets, crafts, etc.)
  • Snacks (breakfast and lunch will be provided)
  • Medications (including Tylenol or ibuprofen, if needed)
  • Toiletries (toothbrush, toothpaste, lotion, etc.)

Important Notes

  • Certain medications can affect the MSLT. If your physician or the sleep lab has asked you to stop taking certain medications, be sure to stop them in time for the test. 
  • No caffeine is allowed during the day of the MSLT.