Sleep disorders Seyed Kazem Malakouti, MD,Iran University of Medical Sciences.
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Transcript of Sleep disorders Seyed Kazem Malakouti, MD,Iran University of Medical Sciences.
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
Sleep disorders
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• Approximately 50% of community-dwelling elderly persons complain of some form of sleep difficulty
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
The most common sleep disorders in the elderly
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• One central question raised by researchers in the field is whether
• these age-related changes represent a decrease in the need for sleep
• or a decrease in the ability to sleep. Although this question is still
• being debated and there is no clear consensus on whether there is
• a reduced need for sleep, there is clearly a reduced ability
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
Contributing factors with SDs
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• Sleep-disordered breathing (SDB) is characterized by respiratory• events, including hypopneas (partial respiration) and/or apneas• (complete cessation of respiration), during sleep. These respiratory• events occur repeatedly over the course of the night with each respiratory• event lasting a minimum of 10 seconds. The number of apneas• per hour of sleep is called the apnea index (AI) and the number of apneas• and hypopneas per hour of sleep is called the apnea–hypopnea• index (AHI; also sometimes called the respiratory disturbance index• [RDI]). Clinical diagnosis of SDB is traditionally given when a• patient has an AHI of 10 to 15.• The cessations in breathing in SDB lead to repeated arousals from• sleep, as well as to reductions in blood oxygen levels over the course• of the night, which result in nighttime hypoxemia.
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• Approximately 2% to 4% of middle-aged men and women (age 30
• to 60 years) have an AHI ≥ 5, compared to 32% to 81% of older• adults (age 60+ years). With increasing AHI, these percentages
are• slightly lower, with 19% to 62% of older adults having an AHI≥15• and up to 24% having an AHI ≥ 20. In addition, within the older• population, SDB is more common in men than in women and in• patients with hypertension, and may b
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• Pathophysiology• There are three types of apneic events:
central, obstructive, and• mixed.
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
Presentation
• The cardinal symptoms of SDB are snoring and excessive daytime• sleepiness. It is often one or both of these two symptoms that• motivate the patient to seek evaluation and treatment of this sleep• disorder. Additional symptoms may include insomnia, nocturnal• confusion, and cognitive deficits, such as difficulty with
concentration• and memory.• Approximately 50% of regular snorers suffer from some degree• of SDB and snoring may be an early precursor to SDB
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• snoring alone is associated with increased risk of ischemic heart disease
• and stroke.
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• excessive daytime sleepiness• sleep fragmentation or repeated nighttime
awakenings• apneic events, and with the nocturnal hypoxia• unable to stay awake• cognitive deficits
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
SDB treatment
• Positive Airway Pressure• continuous positive airway pressure (CPAP• positive airway pressure (BiPAP), and auto-
CPAP
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• Surgical Interventions• There are several different surgical approaches
for the treatment• of SDB, including (1) nasal reconstruction,
which corrects nasal• valve collapse, septal deviations, and turbinate
hypertrophy; (2) uvulopharynpalatoplasty
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• (2) uvulopharynpalatoplasty• (UPPP), which corrects pharyngeal obstruction• by removal of pharyngeal tissue, including soft palate, uvula,• tonsillar pillars, and tonsillar tissue; (3) laser-assisted
uvulopharynpalatoplasty• (LAUP), which has the same standard procedure as• UPPP, but uses a laser to remove the pharyngeal tissue; (4) genioglossus• advancement, which corrects by the forward advancement of• the insertion of the tongue (usually in conjunction with UPPP or• LAUP); and (5) hyoid myotomy, which corrects hypopharyngeal• obstruction by suspending the hyoid bone to the superior edge of• the larynx (usually in conjunction with UPPP or LAUP).
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• Oral Appliances• Oral devices are appropriate for the
management of milder forms• of obstructive sleep apnea and snoring. The
two most common oral• devices are the tongue-retaining device (TRD)
and the mandibular• advancement device (MAD
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
Diet and Lifestyle
• Obesity is a• common problem• Alcohol and certain medications, such as
sedative-hypnotics, narcotics,• and barbiturates, have a depressant effect on the
upper airway• musculature and may exacerbate SDB• Smoking• body position during
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
PERIODIC LIMB MOVEMENTS IN SLEEP/RESTLESS
LEGS SYNDROME
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• Periodic limbmovements in sleep (PLMS) is characterized by clusters• of repeated leg (or sometimes arm) jerks that occur approximately• every 20 to 40 seconds over the course of the night. These clusters• of movements last on an average 0.5 to 5 seconds and cause
repeated• brief awakenings. The number of limb movements followed• by arousals per hour of sleep is called the periodic limb movement• index (PLMI). Clinical diagnosis of PLMS is typically given when a• patient has a PLMI >5.
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• RLS is characterized• by dysesthesia in the legs, usually described by patients as “a
creeping• crawling sensation” or as “pins and needles,” which can only
be• relieved with vigorous movement. These sensations often
occur in• the evening or whenever the patient is in a restful, relaxed
state.• About 90% of patients with RLS also have PLMS, but only about• 20% of PLMS patients suffer from RLS.
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• The prevalence of PLMS increases significantly with age and is estimated
• at 45%, compared to 5% to 6% in younger adults. Despite• this increase in prevalence, the severity of the condition
does not• worsen with age. The prevalence of RLS increases with
age as well.• There is no known gender difference in PLMS, however
RLS is twice• as common in older women than men.
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• dysfunction• of the dopamine system.• iron homeostatic dysregulation• ferritin levels in• the cerebrospinal fluid are lower
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• Patients with symptoms of RLS should be assessed for anemia, iron
• deficiency, uremia, and peripheral neuropathy prior to treatment.
• Polysomnography for PLMS
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
CIRCADIAN RHYTHMS SLEEP DISORDERS
• suprachiasmatic nucleus (SCN) in the anterior
• Hypothalamus
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• core body temperature drops, melatonin
• secretions increase and individuals start feeling sleepy;
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
circadian rhythm lessentrained
• slow degeneration of• the SCN with age, (2) progressive reduction in
endogenous melatonin• secretion during the night, and (3) decreased
sensitivity to• external cues, or alternatively external cues
such as bright light may• be lacking or weak in older adults
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• Healthy older adults receive on average• only 60 minutes of bright light a day (>2000 lux),
whereas elderly• demented patients living in the community receive on
average 30• minutes of bright light a day (>2000 lux• demented nursing• home patients receive on average no light >2000 lux
and only 10• minutes of bright light >1000 lux a day
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• Another common circadian rhythm change in older age is the
• shifting, or advancing, of the sleep–wake cycle. This circadian
• rhythm disorder is called advanced sleep phase syndrome (ASPS),
• a condition in which the sleep–wake rhythm and the core body
• temperature rhythm are advanced, as compared to those of younger
• adults.
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
ADVANCE SLEEP
• Changes in the sleep–wake cycle are likely caused by changes in the
• core body temperature cycle, decreased light exposure, and environmental
• factors
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
ACTIGRAPH
• wear a wrist actigraph for 3–7 days
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
MANAGEMENT
• ASPS is not a medical disorder and does not necessarily need to be treated
• particularly bright-light therapy• exposure to bright light in the early morning
will strengthen and advance the rhythm• exposure to bright light in the late afternoon or
early evening will delay the rhythm• bright light for approximately 2 hours a day
during the late afternoon to early evening
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• will also shift related rhythms such as core body temperature and endogenous melatonin.
• best source of bright light is sunlight, therefore patients should attempt to spend time outdoors in the late afternoon
• sunglasses should not be worn during this time
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• “light box,” which provides a minimum of 2500 lux light exposure
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
RAPID EYE MOVEMENT SLEEP BEHAVIOR DISORDER
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• an intermittent lack of skeletal muscle atonia that is typically present during REM sleep.
• RBD usually occurs during the second half of the night, when REM is more prevalent.
• Nighttime behaviors in RBD include vigorous and complex body movements and actions, such as walking, talking, and eating.
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• RBD is associated with the intake of tricyclic antidepressants, fluoxetine, and monoamine oxidase inhibitors
• withdrawal from alcohol or sedatives• unable to recollect• may be violent and may harm the patient
and/or the patient’s bed partner.
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• Clonazepam• tricyclic antidepressants, • Dopaminergic agents• melatonin
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
insomnia
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• sleep onset insomnia • sleep maintenance insomnia (• early morning insomnia • the most common complaints in the elderly
are of – sleep maintenance insomnia – early morning insomnia.
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
Epidemiology
• The prevalence of insomnia is greater in older than younger adults, with a prevalence of 40% to 50%
• more insomnia complaints than men.
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
Etiology
• arthritis, cardiovascular disease, pulmonary• disease, chronic pain disorders• life changes, such as retirement and death of
loved ones• Depression and anxiety disorders• Polypharmacy
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• stop all in-bed activities• go• to bed when feeling tired enough• stimulating or arousing activities prior to bedtime, such as• watching television, reading exciting books, or watching the alarm• Clock• cannot fall asleep within 20 minutes, they should• get out of bed• should wake• up and get out of bed at the same time everyday (• no longer than 30 minutes in the early• part of the day
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
• The 2005 NIH State-of-the-Science • (1) all antidepressants have potentially
significant adverse effects• (2) barbiturates and antipsychotic
medications• have significant risks• (3) there is no systematic evidence for efficacy
of antihistamines
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Seyed Kazem Malakouti, MD,Iran University of Medical Sciences
BZD side effects
• changes in sleep architecture (i.e., reduction in• delta or deep sleep), morning hangover
effects, leading to excessive• daytime sleepiness, poor motor coordination,
and visuospatial• problems, which may be particularly
pronounced in the elderly.