Comprehensive GCC nursing guide covering sleep physiology, OSA management, insomnia, parasomnias, hospital sleep promotion, and exam preparation.
One complete cycle (N1 → N2 → N3 → REM) lasts approximately 90 minutes. Adults typically complete 4–6 cycles per night. Early cycles are SWS-dominant; later cycles are REM-dominant.
The master circadian pacemaker located in the anterior hypothalamus. Receives photic input from retinal ganglion cells (melanopsin) via the retinohypothalamic tract.
| Age Group | Recommended Sleep |
|---|---|
| Newborn (0–3 mo) | 14–17 hours |
| School-age (6–12 y) | 9–12 hours |
| Teenager (13–18 y) | 8–10 hours |
| Adult (18–64 y) | 7–9 hours |
| Older adult (≥65 y) | 7–8 hours |
Chronic insomnia disorder, short-term insomnia, other insomnia. Characterised by difficulty initiating/maintaining sleep with daytime consequences.
Obstructive Sleep Apnoea (OSA), Central Sleep Apnoea (CSA), Sleep-Related Hypoventilation, Sleep-Related Hypoxaemia. Most common: OSA.
Narcolepsy type 1 and 2, idiopathic hypersomnia, Kleine-Levin syndrome, hypersomnia due to medical/psychiatric conditions.
Delayed Sleep Phase Disorder (DSPD), Advanced Sleep Phase Disorder (ASPD), Shift Work Disorder, Jet Lag, Irregular Sleep-Wake Rhythm.
NREM-related (sleepwalking, sleep terrors, confusional arousals) and REM-related (REM Sleep Behaviour Disorder, nightmare disorder, sleep paralysis).
Restless Legs Syndrome (RLS), Periodic Limb Movement Disorder (PLMD), sleep-related leg cramps, bruxism, rhythmic movement disorder.
Two-week prospective diary recording bed/wake times, awakenings, naps, caffeine, medication. Gold standard for insomnia assessment alongside clinical interview.
Overnight in-lab study measuring: EEG (brain waves/sleep staging), EOG (eye movements — REM detection), EMG (chin/limb muscle tone), SpO2 (oxygen saturation), Airflow (thermistor + pressure transducer), Respiratory Effort (thoracic/abdominal bands), ECG (arrhythmias during events), body position, and video recording.
| Severity | AHI (events/hour) |
|---|---|
| Mild | 5–14 |
| Moderate | 15–29 |
| Severe | ≥30 |
Continuous Positive Airway Pressure (CPAP) delivers a fixed pneumatic splint preventing upper airway collapse. Pressure titrated via in-lab PSG titration or APAP auto-titration (most common initial approach).
Adequate adherence: ≥4 hours/night on ≥70% of nights over 30 days (CMS/AASM definition). Insurance and funding often requires objective data download.
For positional OSA (AHI ≥2× higher supine vs non-supine). Devices: tennis ball technique, positional pillows, wearable vibrotactile devices (e.g. Night Shift). Useful for mild-moderate positional OSA.
Custom dental device advancing mandible 50–70% of maximum protrusion. Effective for mild-moderate OSA or CPAP-intolerant patients. Side effects: TMJ discomfort, tooth soreness (usually transient).
Chronic Insomnia Disorder (ICSD-3): Difficulty initiating sleep (sleep onset latency >30 min), difficulty maintaining sleep (WASO >30 min), or early morning awakening; occurring ≥3 nights/week for ≥3 months, causing daytime impairment, despite adequate sleep opportunity.
Duration <3 months; often precipitated by identifiable stress (bereavement, illness, travel). Resolves when stressor resolves in many, but may become chronic if perpetuating factors develop.
Explained by Spielman's 3P model: Predisposing (genetics, anxiety trait), Precipitating (life events), Perpetuating (compensatory behaviours — napping, extending time in bed, worry about sleep).
Cognitive Behavioural Therapy for Insomnia (CBT-I) is the evidence-based first-line treatment for chronic insomnia (superior to pharmacotherapy long-term). Typically 4–8 sessions.
Restricts time in bed to actual sleep time (minimum 5.5 hours), building homeostatic sleep pressure and consolidating sleep. Time in bed extended by 15 min per week once sleep efficiency >85%.
Identify and challenge unhelpful sleep-related beliefs: "I must get 8 hours or I'll fall apart," "I can't function on less than 7 hours." Replace with evidence-based perspectives.
Progressive muscle relaxation, mindfulness-based approaches, diaphragmatic breathing. Reduces physiological hyperarousal.
Unable to fall asleep until 02:00–06:00; awakens late morning/afternoon. Common in teenagers (biological phase delay in puberty). Normal sleep quality within chosen timing. Treatment: morning bright light therapy (10,000 lux, 30 min after wake), low-dose evening melatonin (0.5 mg, 6 hours before desired sleep onset), chronotherapy.
Sleep onset at 18:00–21:00; early morning waking (03:00–05:00). More common in older adults. Treatment: evening bright light therapy.
Insomnia and/or excessive sleepiness aligned with work schedule conflicts with circadian system. Highly prevalent in GCC healthcare workers (nursing, emergency services). Increased risk of CV disease, metabolic syndrome, depression, breast cancer (prolonged shift work).
Transient misalignment after rapid transmeridian travel. Eastward travel harder than westward (phase advance harder). Recovery: 1 day per time zone. Managed with timed melatonin and light exposure.
During Ramadan, sleep patterns in GCC shift dramatically: main sleep period moves from night to early morning (post-Suhoor); nocturnal social activity peaks. Patients experience sleep deprivation and phase delay. Healthcare workers on Ramadan night shifts face compounded challenges. Clinicians should ask about Ramadan timing when assessing sleep complaints.
EDS without cataplexy; prolonged sleep (10–14 hours), severe sleep inertia (sleep drunkenness). Normal or prolonged MSLT latency; <2 SOREMPs. Normal CSF hypocretin. Management: modafinil, clarithromycin (augments GABA-A antagonism), flumazenil.
Rare recurrent hypersomnia: episodes of hypersomnia (16–20 hours/day) lasting days–weeks, with hyperphagia, hypersexuality, cognitive impairment, and altered perception. Between episodes: completely normal. Predominantly affects adolescent males. No effective treatment; lithium may reduce episode frequency. Episodes become less frequent over years.
Occur in first third of night (N3 SWS). Patient partially aroused — not fully awake. Amnesia for episodes is typical.
Loss of normal REM muscle atonia; patient physically acts out vivid, often violent dreams (punching, kicking, shouting). Usually injures self or bed partner. Occurs in second half of night.
Confirmed by PSG showing REM without atonia. Treatment: clonazepam 0.5–2 mg nocte (most effective); melatonin 3–12 mg (safer in elderly; preferred in PD).
Benign; occurs in general population (up to 40% lifetime prevalence). Reassure patient it is temporary and harmless. Part of narcolepsy tetrad if recurrent with EDS.
Uncomfortable urge to move the legs (less commonly arms), usually worse at rest and in the evening, relieved by movement. Interferes with sleep onset.
Repetitive stereotyped limb movements during sleep (ankle dorsiflexion/knee flexion), occurring every 20–90 seconds. Diagnosed on PSG (PLMS index >15/hour). Only clinically significant if causing sleep disturbance (frequent arousals, EDS). Treatment: similar to RLS — dopamine agonists, pregabalin.
Repetitive jaw muscle activity (grinding/clenching) during sleep. Leads to tooth wear, jaw pain, headache, TMJ disorder. Diagnosis: clinical (dental examination) or PSG. Management: occlusal splint (custom dental guard), stress management, avoid caffeine/alcohol. Botulinum toxin injection to masseter for severe cases.
Richards-Campbell Sleep Questionnaire (RCSQ): 5-item visual analogue scale assessing depth, latency, awakenings, return to sleep, and overall quality. Validated for ICU patients; completed by patient each morning.
Physical, cognitive, and psychological morbidity persisting after ICU discharge. Sleep disorders are a prominent component: up to 60% of ICU survivors report insomnia and sleep quality impairment for months–years after discharge.
Sleep fragmentation during ICU admission (due to noise, light, sedation protocols, mechanical ventilation) disrupts circadian rhythm and normal sleep architecture, with long-lasting effects.
Rapid rotation (changing shift direction quickly) is most disruptive. Slow forward rotation (morning → evening → night) is physiologically preferable. Fixed night shifts allow partial circadian adaptation.
Answer 8 yes/no questions to calculate OSA risk score. For clinical decision support — not a diagnostic tool.