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The International Classification of Sleep Disorders (ICSD) is "a primary diagnostic, epidemiological and coding resource for clinicians and researchers in the field of sleep and sleep medicine". [1] The ICSD was produced by the American Academy of Sleep Medicine (AASM) in association with the European Sleep Research Society, the Japanese ...
ICD-9 [10] Organic sleep disorder, nonorganic sleep disorder and as symptom of other diseases 1979 Nosology Clinical classification into four major groups: Disorder of initiating and maintaining sleep (DIMS) - Insomnias, Disorder of Excessive sleep (DOES) - Hypersomnias, Disorder of sleep-wake schedule (Circadian rhythm disorders) and Parasomnias
There are criteria of SWSD in the International Classification of Diseases (ICD-10), in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), and in the International Classification of Sleep Disorders (ICSD) – Second and Third Editions. The diagnosis requires the following assumptions : [41] [42] [6]
Occasional noncircadian days may occur (i.e., sleep is "skipped" for an entire day and night plus some portion of the following day), followed by a sleep period lasting 12 to 18 hours. The symptoms do not meet the criteria for any other sleep disorder causing inability to initiate sleep or excessive sleepiness.
A circadian rhythm is an entrainable, endogenous, biological activity that has a period of roughly twenty-four hours. This internal time-keeping mechanism is centralized in the suprachiasmatic nucleus (SCN) of humans, and allows for the internal physiological mechanisms underlying sleep and alertness to become synchronized to external environmental cues, like the light-dark cycle. [4]
Dyssomnias are primary disorders of initiating or maintaining sleep or of excessive sleepiness and are characterized by a disturbance in the amount, quality, or timing of sleep. Patients may complain of difficulty getting to sleep or staying asleep, intermittent wakefulness during the night, early morning awakening, or combinations of any of these.
Prior to the introduction of this code, the nonspecific code 307.45, Circadian rhythm sleep disorder of non-organic origin, was available, and as of 2014 remains the code recommended by the DSM-5. ICD-10-CM: Circadian rhythm sleep disorder, free running type; code G47.24 was due to take effect October 1, 2014.
Sleep state misperception (SSM) is a term in the International Classification of Sleep Disorders (ICSD) most commonly used for people who mistakenly perceive their sleep as wakefulness, [1] [2] though it has been proposed that it can be applied to those who severely overestimate their sleep time as well [3] ("positive" sleep state misperception). [4]