Sleep-Wake Disorders - Block 3 Flashcards
Describe the classifications of sleep disorders according to ICSD-3?
What are the types of sleep disorders according to the DSM5?
- Insomnia dx
- Hypersomnolence dx
- Narcolepsy
- Breathing related sleep dx
- Circadium rhythm sleep dx
- Non-REM sleep arousal dx
- Nightmare dx
- ReM sleep behaviour
- RLS
- Substance- or medication-induced sleep dx
What are the stages of the sleep cycle?
Describe the sleep patterns of an infant?
Up to 20 hrs, REM and NREM occurs at 3-6 months
* Cycles between active and quiet sleep
As you age how does sleep change from infancy?
Amount of nightly delta sleep declinses and amount of REM sleep increases
How is sleep affected in elderly?
Fragmented sleep with no delta sleep
What are the neurotransmitters for NREM?
GABA and adenosine
What are the neurotransmitters for REM?
Cholinergic (start)
Noradrenergic (stop)
What are the neurotransmitters for arousal and wakefulness?
D, NE, Ach, H, Neuropeptides, orexin (hypocretin), serotonin
What neurotransfitter is used of diagnostics for NT1?
orexin
What is insomnia?
The inability to initiate or maintain sleep -> daytime sleepiness
What constitutes chronic insomnia?
≥ 3/week and for ≥3 months
What are the characteristics of primary insomnia?
Hyperarousal state
What are the RF of insomnia?
Fixed: female, advanced age, family hx
Depression/anxiety
Unemployed
Separated/widowed
Low socioeconomic status
What are the causes of insomnia?
- Situational
- Medical
- Psychiatric
- Pharm-induced
What are situational causes of insomnia?
- Work or financial stress
- Jet lag/shift work
What are medical causes of insomnia?
- CV
- Respiratory
- Chronic pain
- Endocrine dx
- GI
- Neurologic
- Pregnancy
What are the psychiatric causes of insomnia?
- Mood dx
- Anxiety
- Substance use disorders
What are drugs that induce insomnia?
- Antiseizure
- Central adrenergic blockers
- Diuretics
- SSRI
- Steroids
- Stimulants
What is an examples of insomnia diagnostic tools?
Pittsburgh sleep quality index
What are the diagnostic criteria for insomnia
- Sleep disturbances/complaint
- Associated consequences
- Frequnecy
- Duration
- Adequate opportunity
- Relationship to another condition
What are the goals for treating insomnia?
- Correct the underlying complaint
- Consolidate sleep
- Improve daytime functioning and sleepiness
- Avoid ADR
What are the nonpharms for insomnia?
- CBT-I
- Stimulus control procedures
- Sleep hygiene recs
What are the components of CBT-I?
Cognitive + stimulus control + sleep restriction +/- relaxation therapies
What are ways to achieve stimulus control?
- Establish regular time to wake/sleep
- Sleep only to feel rested
- Go to bed only when sleepy
- Avoid trying to force sleep
- Avoid blue spectrum light
- Avoid daytime naps
- Schedule worry time during day
What are recs for good sleep hygiene?
- Exercise routinely but not close to HS
- Create comfortable leeping environment
- Reduce alcohol, caffeine, nicotine
- Avoid drinking large quantities of liquid
- Do something relaxing before HS
Pharm tx for insomnia?
- Antihistamines
- Sedating antidepressants
- Melatonin receptor agonists
- Dual orexin receptor antagonists
- Benzos
- Non-benzo GABAa agonists
Types of antihistamines for insomnia?
Diphenhydramine (Benadryl)
Doxylamine (Unisom)
Indications for using antihistamines for insomnia?
Mild insomnia for onset only due to tolerance and non-linear pk (increasing dose does nothing)
ADRs of antihist?
Anticholinergics: constipation, dry mouth and eyes
Types of sedating AD? INdication?
TCAs: amitriptyline (Elavil), Doxepin (Silenor), Nortriptyline (Pamelor)
Mirtazipine
Trazodone
How do you administer Doxepin?
30 mins prior to bed and separate from food by 3 hrs
ADRs of TCAs?
- Daytime sedation
- Anticholinergic effects
- Adrenergic block
- Cardiac conduction prolongation
Mirtazapine
ADR
Remeron
ADR: Weight gain, DLD, orthostatic hypotension, anticholinergic effects, daytime sedation
Trazodone
Indication, Admin, ADR
Indication: good in patients w/ a hx of substance abuse or SSRI and buproprion-induced insomnia
Admin: Shortly after a meal or snack increases absorption
ADR: Carryover sedation, a-adrenergic blockade, orthostasis, priapism, cardiac arrhythmias
BBW of sedating antidepressants?
- Suicidality
- Seratonin syndrome
- Withdrawal