Sleep: The Golden Chain That Ties Health and Our Bodies Together (A Review of Sleep Disorders)
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Sleep:The Golden Chain That Ties
Health and Our Bodies Together(A Review of Sleep Disorders)
Academy Of Medicine Clinical Day, February 24, 2012Elliott K. Lee MD, FRCP(C), D. ABPN, D. ABPN Addiction Psychiatry, D. ABSM
Assistant Professor, University of Ottawa Faculty of MedicineSleep Specialist, Royal Ottawa Mental Health Center Sleep
Disorders Clinic
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ObjectivesDescribe the importance of sleep and
impact of sleep disorders in the community.
Understand common sleep disorders and how they can be assessed and treated.
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OutlineReview sleep architecture, and how sleep
is controlled.Review insomnia and excessive daytime
sleepiness, and their causes
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SLEEP
NREM Sleep
Stage N1, N2 (“Light sleep”)
procedural memory (skills, motor learning)
Stage N3 Deep or “Slow Wave
Sleep” (SWS)
CNS restorationDeclarative memory
REM Sleep
DreamingMood Regulatory Role?
Memory?
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Sleep Hypnogram
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Insomnia Excessive Daytime Sleepiness
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InsomniaAffects 3.3 million Canadians (1/7)
according to Statistics Canada (2002)Especially:
- Middle aged (45-64)- Widowed- Minimal education- Obese- Women > men
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Treating Insomnia:Personal Sleep Hygiene
Maintain a regular wake/sleep schedule, possibly add mild sleep restriction.
Refrain from taking naps. Exercise - but not within 3 hours of bedtime. Establish a relaxing routine before bedtime. Use the bedroom only for sleep activities. Avoid clock watching Set environment (light, noise, temperature)
at comfortable levels. Avoid caffeine after mid-afternoon.
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Medication optionsZopiclone (Imovane)Trazodone (Desyrel)Other options:
- Melatonin- Tricyclic Antidepressants- Benzodiazepines- Mirtazapine (Remeron)- Atypical Antipsychotics
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EszopicloneSleep latency from ave = 70 minPlacebo = 45 minEszopiclone = 27.3 min
Total Sleep TimePlacebo = 330 minEszopiclone = 390 min
Eszopiclone users had improved quality of life, and no reported incidence of tolerance or withdrawal
Sleep Latency
Total Sleep Time
Walsh et al, Sleep, 2007
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Obstructive Sleep Apnea (OSA) Pauses in breathing > 10 seconds in length Respiratory Disturbance Index (RDI): >5 hr =
significant Prevalence – up to 25% of men, and 9% of women Key diagnostic questions:
- Do you feel satisfied with the quality of your sleep?- Does your partner complain that you snore?
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Obstructive Sleep Apnea Syndrome Symptoms
Snoring >80%*up to ½ of pts may sleep separately from partners
Apneic episodes (partner) 75%AM Dry Mouth 74%Restless Sleep/ AM H/A 50%Sensation of choking 18-
31%Nighttime bathroom visits 28%Kryger, Roth and Dement, Principles and
Practice of Sleep Medicine, 2005 p. 1043
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OBSTRUCTIVE SLEEP APNEA (OSA)
Causes ▪ Narrow Upper Airway ▪ Elevated BMI ▪ Family Hx
Exacerbated by: ▪ Medications – muscle relaxants,
sedatives ▪ Alcohol Consumption
▪ Supine sleep ▪ REM sleep ▪ **Supine + REM sleep
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Consequences of OSA
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Odds Ratio – AHI to Hypertension
Peppard PE et al. N Eng J Med, 2000; 342(19): 1378-84
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Odds Ratio – AHI to Hypertension
Peppard PE et al. N Eng J Med, 2000; 342(19): 1378-84
Change in BP with use of CPAP (9 weeks)
Becker HF et al. Circulation, 2003; 107(1):68-73
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Traditional View
Obesity
Insulin Resistance
Low Grade Inflammation
↑ Oxidative Stress
Endothelial Dysfunction
Hypertension
Ischemic heart diseases
Arrhythmias
CV stroke/TIA
CardiovascularDisease
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Atherosclerosis and Hypoxemia?Savransky and colleagues studied mice
– divided into 4 groups:
Intermittent Air (Control)
10
10
Chronic Intermittent Hypoxemia
10
10
Regular diet
High Cholesterol
diet
*Savransky V et al Am J Respir Crit Care Med, 2007
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Atherosclerosis and Hypoxemia?Which ones developed atherosclerosis?
Intermittent Air (Control)
Chronic Intermittent Hypoxemia
Regular diet
High Cholesterol
diet
0
0
0
9
*Savransky V et al Am J Respir Crit Care Med, 2007
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Atherosclerosis and Hypoxemia?Sections of aorta from the mice:
Intermittent Air (Control)
Chronic Intermittent Hypoxemia
Regular diet
High Cholesterol
diet
*Savransky V et al Am J Respir Crit Care Med, 2007
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Modern View (?)
ObesityInsulin Resistance
Low Grade Inflammation
↑ Oxidative Stress
Endothelial Dysfunction
Hypertension
Ischemic heart diseases
Arrhythmias
CV stroke/TIA
CardiovascularDisease
Mechanical upper airway obstruction
↑ Oxidative Stress↑ Sympathetic ActivityInsulin ResistanceIntermittent HypoxemiaLow grade Inflammation
Independent additive risk factor
OSA
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MonthsMarin JM et al. Lancet, 2005
Fatal CV events and OSA
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Nonfatal CV events and OSAMarin JM et al. Lancet, 2005
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Sleep and Mental IllnessOSA can exacerbate mental illness:
- Aggression /cognition in schizophrenia- Depression- Nightmares in PTSD- Cognitive dysfunction in dementias- Relapse to substance abuse
Sleep Psychiatricillness
Lee EK and Douglass AB. Can J Psychiatry, 2010; 55(7): 403-12
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TREATMENTS FOR OSA **CPAP – Continuous Positive Airway Pressure **Weight Loss - ↓ BMI = ↓ RDI Avoid Alcohol Consumption Avoid Sedative Medications “Snoreball” Technique / Positional Therapy Oral Appliance Upper Airway Surgery
Tonsillectomy (pediatrics) Uvulopalatopharyngoplasty (UPPP) Maxillomandibular advancement Tracheostomy
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CPAP for OSA
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Stage 4Stage 3Stage 2Stage 1
REMWake
Movement
23:00 00:00 01:00 02:00 03:00 04:00 05:00 06:00
STAG
ING
60
80
100
23:00 00:00 01:00 02:00 03:00 04:00 05:00 06:00
OXI
MET
RY
0
10
20
23:00 00:00 01:00 02:00 03:00 04:00 05:00 06:00
CPA
P
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Alcohol on Breathing
Issa and Sullivan, J Neurol Neurosurg Psychiatr, 1982; 45:353-9
Snoring (baseline)
Snoring, 2nd night, drank EtOH 6-9 PM, about 8-10 drinks
53 yr old male, “social drinker”
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Oral Appliances
Silencer-Johns Dental Labs
Klearway- Great Lakes Orthodontics
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Surgery (UPPP)
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Restless Legs Syndrome
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Restless Legs SyndromeNB- symptoms WHILE AWAKE“URGE”U – rge to move legsR – est – symptoms worsened at restG – ets better with movementE – vening – symptoms worse in evening
Often associated with periodic limb movements (PLMs), WHILE ASLEEP
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Epidemiology – RLSAffects 5-15% of the population Mean age – 27- 41 years old
- prevalence increases with age- age of onset varies widely
(children – elderly)Up to 2.5X more common in women
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Restless Leg Syndrome + PLMD
Thought to be related to same problem – dopamine deficiency in the brain
May be exacerbated by caffeine, nicotine, alcohol, or iron deficiency
Mainstay of treatment- Dopamine replacement therapy
- levodopa, pramipexole, ropinirole- Other meds may also help
- neurontin, benzodiazepines, opioids
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NarcolepsyA pathologic disorder of sleepiness during
the day – key symptom – sleepinessMay have insomnia at nighttimeAffects about 1/2000 peopleVery underdiagnosed; difficult to recognize80% may have cataplexy, a REM sleep
intrusion phenomenon on wakefulnessRelated to cerebrospinal fluid deficiency of
hypocretin (orexin)
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Narcolepsy TreatmentSLEEPINESS: – Stimulants
d-amphetamine (Dexedrine), methylphenidate (Ritalin)
Novel - modafinil (Alertec / Provigil).- armodafinil
CATAPLEXY:– Antidepressants – e.g. venlafaxine– Sodium oxybate (Xyrem)
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Summary Sleep has a distinct architecture and is normally
regulated by a complex set of environmental, biological and social influences
Insomnia and excessive daytime sleepiness are common issues among patients
If sleep is problematic, assessment for an underlying sleep disorder such as obstructive sleep apnea, restless legs syndrome, narcolepsy or others is important, as effective treatments are available for these conditions
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Screening Questions For Symptoms Of Poor Sleep
Do you feel satisfied with the quality of your sleep?
Does you partner complain about your sleep?
Do you have difficulties falling or staying asleep?
Do you have problems with sleepiness during the day?