Sleep Disorders: Classification, Assessment and Comprehensive Management

Focus: sleep disorders classification and management | Audience: emergency medicine, clinical medicine, nursing and health-science students.

Learning objectives

• Classify sleep disorders using a modern clinical framework while recognising the older dyssomnia/parasomnia terminology.
• Assess a sleep complaint logically from safety and medical causes to sleep diary, examination and targeted testing.
• Manage insomnia, sleep-related breathing disorders, hypersomnolence, circadian disorders, parasomnias and movement disorders in adults and children.
• Provide detailed nursing, family, prevention, discharge and follow-up interventions.

1. What is a sleep disorder?

A sleep disorder is a persistent disturbance in sleep initiation, maintenance, timing, duration, quality, breathing, movement or behaviour that causes daytime impairment, distress, injury or medical risk. A short sleeper who feels well and functions normally is not automatically disordered. Conversely, a person with adequate hours but fragmented, poorly timed or apnoeic sleep may be severely impaired.

The supplied classification slide deck uses dyssomnias for disturbances in the amount, quality or timing of sleep (insomnia, hypersomnia and sleep–wake schedule disorders) and parasomnias for abnormal behaviours or experiences during sleep or transitions. It also lists sleep disturbance secondary to mental, medical or substance causes. Modern ICSD-3 groups disorders into six/seven clinical families; the older terms remain useful for teaching but should not replace a current diagnosis.

2. Practical classification

3. First contact: safety and goals

3.1 Aims of management

1. Protect airway, breathing, circulation, consciousness and the patient/household from immediate harm.
2. Relieve distress and daytime impairment without causing sedation, dependence or respiratory depression.
3. Identify and treat the underlying medical, psychiatric, developmental, environmental or medication cause.
4. Restore adequate, regular, age-appropriate sleep and safe daytime functioning.
5. Teach the patient/family skills that prevent relapse and arrange specialist follow-up when needed.

3.2 Emergency screen

4. Assessment and diagnosis

4.1 Sleep history

• Usual bedtime and wake time on school/work days and free days; sleep latency; number/duration of awakenings; final awakening; naps; total sleep opportunity.
• Snoring, mouth breathing, gasps, pauses, choking, unusual position, sweating, nocturia, morning headache and dry mouth.
• Nightmares, sleepwalking, screaming, movements, teeth grinding, dream enactment, sleep paralysis, hallucinations and enuresis.
• Daytime sleepiness, irresistible naps, cataplexy (emotion-triggered weakness), concentration, mood, accidents and school/work effect.
• Light exposure, screens, caffeine/energy drinks, nicotine, alcohol, exercise, meals, shift work, travel and bedroom environment.
• Medical, psychiatric, neurological, pain, respiratory, allergic, reflux, dermatological and developmental history; pregnancy where relevant.
• All prescribed/OTC/traditional medicines, stimulants, steroids, antidepressants, beta-blockers, theophylline, decongestants, sedating antihistamines and recent withdrawal.

4.2 Sleep diary and examination

Use a 1–2 week sleep diary (including weekends), and actigraphy when timing is uncertain. Examine growth/BMI, blood pressure, airway/tonsils, nasal obstruction, craniofacial structure, neuromuscular status, cardiopulmonary system, skin and mental state. Assess development and school reports in children.

4.3 Targeted investigations

5. Universal management foundations

5.1 Healthy sleep and environment

• Set a stable wake time and age-appropriate sleep opportunity; regularise naps and meals.
• Use morning daylight/activity and dim light in the evening; remove phones/TV/computers from the bedroom or use a strict device curfew.
• Keep the room cool, dark, quiet and safe; address mosquitoes, heat, noise, overcrowding and unsafe sleeping arrangements.
• Avoid caffeine, energy drinks, nicotine and alcohol near bedtime; avoid large meals, reflux triggers and vigorous exercise immediately before sleep.
• Use a wind-down routine (wash, reading, prayer/relaxation, breathing) and a bed only for sleep.
• During admission, cluster observations, control pain/noise/light, mobilise by day and avoid unnecessary overnight disturbances.

5.2 Psychological and behavioural treatment

• CBT-I: stimulus control, sleep restriction/compression, cognitive restructuring, relaxation and relapse prevention; first-line for chronic insomnia in adults and adapted for adolescents.
• Children: put the child down drowsy but awake; use consistent response, brief reassurance, graduated checking or bedtime fading, positive rewards and predictable limits. Do not punish, lock in a room or ignore danger/illness.
• Treat anxiety, depression, PTSD, ADHD, autism-related distress, substance use and family conflict. Trauma-informed care acknowledges fears instead of denying or shaming them.

6. Insomnia

Insomnia is difficulty initiating sleep, maintaining sleep, early awakening or non-restorative sleep despite adequate opportunity, with daytime impairment. The supplied adult deck uses the teaching threshold of at least three nights/week for at least one month; modern chronic insomnia definitions generally use at least three nights/week for at least three months. Acute insomnia commonly follows illness, stress, shift change or bereavement.

Causes and assessment

• Medical: pain, asthma, reflux, eczema/itch, heart disease, respiratory disease, menopause, urinary symptoms and periodic movements.
• Psychiatric: anxiety/racing thoughts, depression/early morning waking, mania (decreased need for sleep), psychosis and PTSD.
• Substances/medicines: caffeine, stimulants, alcohol withdrawal, amphetamines, steroids, fluoxetine, theophylline, propranolol and decongestants may disturb sleep.
• Behavioural/social: naps, irregular hours, poor exercise, heat/noise, financial loss, separation, bereavement and family disruption.

Management

1. Treat the cause and correct the schedule; explain that time in bed awake can perpetuate insomnia.
2. Start CBT-I/parent behavioural therapy, relaxation, stimulus control and a sleep diary.
3. If medication is considered, use the lowest effective dose for the shortest time with review. Avoid routine benzodiazepines, Z-drugs and sedating antihistamines in children, older adults, pregnancy, OSA, respiratory disease, delirium or substance-use risk.

7. Sleep-related breathing disorders

7.1 Obstructive sleep apnoea (OSA)

OSA is recurrent upper-airway narrowing/collapse during sleep with increased effort, arousals, oxygen fluctuation and sometimes hypercapnia. In children, enlarged tonsils/adenoids, obesity, allergic rhinitis, craniofacial or neuromuscular disease are important causes. Clues include habitual snoring, mouth breathing, gasps, pauses, unusual positions, sweating, morning headache, enuresis, poor growth, inattention, irritability or school decline. Daytime hyperactivity can replace sleepiness in children.

• Assessment: airway/tonsil examination, growth/BMI, blood pressure, sleep history and PSG when diagnosis/severity is uncertain or surgery risk is high.
• Management: weight support, nasal saline/medical rhinitis treatment, avoid smoke exposure, treat hypothyroidism/neuromuscular disease, adenotonsillectomy when indicated, and CPAP/BiPAP when surgery is not suitable or OSA persists. Reassess after surgery in high-risk children.
• Emergency: severe obstruction, cyanosis, pulmonary hypertension, cor pulmonale or marked desaturation needs admission/airway support.

7.2 Central apnoea and hypoventilation

Central events reflect reduced respiratory drive (neurological disease, opioids, high altitude or congenital hypoventilation). Assess brainstem/neuromuscular disease, medications and blood gases; involve respiratory/sleep specialists. Non-invasive ventilation, oxygen or treatment of the underlying disease must be individually titrated—oxygen alone can worsen hypercapnia in some patients.

8. Central disorders of hypersomnolence

Narcolepsy

Features include excessive daytime sleepiness, irresistible sleep attacks, cataplexy, sleep paralysis, hypnagogic/hypnopompic hallucinations and disrupted nocturnal sleep. Type 1 is associated with cataplexy/low orexin; type 2 lacks cataplexy. Confirm with specialist PSG followed by MSLT after adequate sleep and exclusion of OSA, insufficient sleep, drugs and mood disorder.

• Regular scheduled naps, stable sleep, safety counselling and school/work adjustments are foundational.
• Specialists may use modafinil, methylphenidate/other stimulants or sodium oxybate; these require interaction, cardiovascular, psychiatric and misuse monitoring. Do not initiate in primary care or emergency settings without specialist plan.

Idiopathic hypersomnia/insufficient sleep

First confirm adequate sleep opportunity, OSA, circadian delay, depression, sedatives, epilepsy, anaemia and endocrine disease. Treat the cause and reinforce safe driving/work restrictions.

9. Circadian rhythm sleep–wake disorders

Melatonin timing matters: for circadian phase shifting it is taken several hours before the desired sleep time; for sleep-onset insomnia it is closer to bedtime. Confirm product strength and local regulation because supplements vary.

10. Parasomnias

10.1 NREM arousal disorders

Sleepwalking, sleep talking, confusional arousals and night terrors arise from incomplete arousal, often in the first third of the night during N3. The child may sit up, scream, appear confused and have little or no morning memory. Triggers include sleep deprivation, fever, stress, irregular schedules, OSA and medications.

• Reassure; protect doors, windows, stairs, balconies, water, fire and weapons; use alarms where appropriate.
• Do not forcibly awaken or shame the child during an event; guide gently back to bed.
• Regularise sleep, treat OSA/fever and consider scheduled awakening for predictable episodes.
• Refer for frequent injury, atypical timing, adult onset, daytime seizures or diagnostic uncertainty. Clonazepam is rarely specialist-prescribed and is not routine paediatric treatment.

10.2 Nightmares, sleep paralysis and REM sleep behaviour disorder

• Nightmares: occur in REM, usually later in the night, with recall. Reassure, review trauma/anxiety/medicines, use imagery rehearsal and avoid frightening media.
• Sleep paralysis: brief inability to move at sleep onset/waking; explain REM atonia, improve sleep regularity and assess narcolepsy if recurrent with sleepiness/cataplexy.
• REM sleep behaviour disorder: dream enactment with loss of atonia, more common in older adults or neurological disease. Make the bedroom safe, review serotonergic medicines and refer for PSG/neurology. Melatonin or clonazepam may be used by specialists after respiratory/fall-risk assessment.

10.3 Enuresis and bruxism

• Assess constipation, UTI/diabetes, OSA, stress and development. Use positive rewards, regular toileting and alarm therapy; desmopressin may be prescribed for selected cases with strict fluid counselling.
• For bruxism, check dental wear, pain, stress, medicines and OSA; dental protection and behavioural stress treatment may help.

11. Sleep-related movement disorders

Restless legs syndrome (RLS)

RLS is an urge to move the legs with uncomfortable sensations, worse at rest/evening and relieved by movement. Children may describe “bugs,” aches or kicking rather than classic words. It can cause insomnia, fatigue, inattention and hyperactivity. Ask about family history, iron intake, renal disease and medicines.

• Check CBC and ferritin; many paediatric sleep services consider iron replacement when ferritin is below 50 µg/L after clinical assessment.
• A common specialist example is oral elemental iron about 3 mg/kg/day (range 2–6 mg/kg/day depending on protocol), with vitamin C/empty-stomach advice when tolerated and repeat ferritin/side-effect review after roughly 8–12 weeks. Confirm formulation and avoid iron toxicity.
• Reduce caffeine, treat OSA and review antihistamines/antidepressants. Dopaminergic agents, gabapentin or pregabalin are specialist options, not routine emergency prescriptions.

Periodic limb movement and rhythmic movement

PSG confirms periodic movements when clinically significant. Correct iron deficiency, treat OSA and protect from injury; consider referral for persistent daytime impairment.

12. Pharmacological principles

13. Nursing and multidisciplinary management

1. Establish a sleep baseline and daily sleep diary; document stage-related events, snoring, oxygenation, falls, pain, medication and daytime function.
2. Maintain a safe sleep environment: appropriate cot/bed, airway position, falls precautions, secured windows/doors and removal of weapons/hazards.
3. Cluster care, dim lights/noise at night, encourage daylight/mobility by day and coordinate with family/school.
4. Teach parents how to respond to night waking without reinforcement, how to use alarms and how to protect a sleepwalker.
5. Monitor CPAP/BiPAP fit, skin, leaks, adherence, oxygenation and CO2 where available; escalate intolerance or deterioration.
6. Check medication calculations, sedation, respiratory rate, blood pressure, paradoxical agitation, falls, appetite and adherence; record response.
7. Coordinate paediatrics, respiratory/sleep medicine, ENT, neurology, psychiatry, psychology, dentistry, dietetics, school and social work.
8. Provide a written crisis and follow-up plan with return precautions and local referral pathway.

14. Prevention and health promotion

• Teach age-appropriate sleep needs and routines from infancy; model non-violent, consistent bedtime limits.
• Prevent OSA complications through smoke-free homes, healthy nutrition/activity, allergy treatment and timely ENT/craniofacial review.
• Prevent accidents by securing doors/windows, stairs, water, fire and medicines; never let a sleepy person drive or operate machinery.
• Address adolescent screen exposure, caffeine, school start times, shift work and mental-health stress.
• Review sleep after hospital discharge, new medicines, trauma, developmental change and chronic disease.

15. Worked cases

16. Discharge and follow-up checklist

• Diagnosis or working differential and tests explained in plain language.
• Sleep schedule, environmental plan and medication instructions written down.
• Safety measures and return precautions discussed (apnoea, cyanosis, seizure, injury, severe sedation, confusion, suicidal thoughts).
• Follow-up date, referral destination, sleep diary and school/work accommodations arranged.
• Medication review and objective goals agreed: sleep latency, awakenings, daytime alertness, oxygenation, school attendance and injury reduction.

17. Quick self-test

1. How do dyssomnias and parasomnias differ?
2. List four OSA red flags in a child and three management options.
3. Why should CBT-I and behavioural treatment precede hypnotics for most insomnia?
4. What is the characteristic pattern of delayed sleep–wake phase disorder?
5. How do NREM night terrors differ from REM nightmares?
6. What ferritin threshold is commonly considered when evaluating paediatric RLS, and what must be checked before iron treatment?
7. Name three situations in which a sleep complaint is an emergency.

Key references and source note

Starting sources: Sleep disorders: classification and insomnia overview and Sleep disorders in children; approach and management. Expanded using ICSD/AASM concepts, paediatric sleep medicine literature and current clinical safety principles. Verify all medicines, weight-based doses, PEP/respiratory support and referral requirements against the current Ugandan formulary and facility protocols.