Evaluation of pathological sleepiness by Multiple Sleep Latency Test and 24‐hour polysomnography in patients suspected of idiopathic hypersomnia

Source : https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8048966/

Sleepiness is considered not to be unidimensional. The International Classification of Sleep Disorders, 3rd edition (ICSD‐3) employs two criteria for 'pathological sleepiness' for idiopathic hypersomnia: (i) sleep prolongation with a 24‐h total sleep time (TST) ≥ 660 min, measured either by 24‐h polysomnography (24‐h PSG) or by wrist‐actigraphy‐based sleep time averaged for at least 7 days; and high sleep propensity with a mean sleep latency (mSL) of ≤8 min on the Multiple Sleep Latency Test (MSLT).