Nonrespiratory Pediatric Sleep Disorders

Nonrespiratory Pediatric Sleep Disorders
Kristine Bresnehan Servidio
Approximately 25% of all children experience some type of sleep problem during childhood (1). Although some pediatric sleep disorders are treatable, many become chronic if left untreated (1). Chronic insufficient sleep is increasing because of competing priorities such as homework, television, social activities, and poor sleep hygiene (1). Sleep disorders are preventable through education regarding normal sleep behavior, routines, self-soothing techniques, and sleep hygiene. Sleep problems in children have a direct effect on parents’ sleep, stress levels, and family interactions. Most importantly, sleep is necessary for children to function optimally (1).
Although insufficient quantity and quality of sleep in children usually result in excessive daytime sleepiness, children may not exhibit the same symptoms as adults. Sleepiness in children often manifests as mood disturbances, hyperactivity, poor impulse control, and neurocognitive dysfunction. Mood disturbances such as irritability, temper tantrums, and poor emotional regulation are some of the many signs of insufficient sleep. Cognitive dysfunction may appear as inattention, poor concentration, decreased reaction time, impaired vigilance, poor decision making and problem solving, learning problems, and poor academic performance. Behaviorally, the child may be overactive, noncompliant, have poor impulse control, and demonstrate oppositional behavior and increased risk taking (2).
Sleep disturbances in children are most often reported by the parents or caregivers because of the negative impact that they have on the family. It makes sense that pediatricians are often the first to hear a complaint regarding pediatric sleep disorder. Pediatricians, in collaboration with the Sleep Disorders Center, should take an aggressive role in the early detection and treatment of sleep disorders.
AGE-RELATED FEATURES OF NONRESPIRATORY PEDIATRIC SLEEP DISORDERS
Depending on the child’s age and maturity, nonrespiratory sleep disorders can manifest themselves in different ways. Some sleep disorders are more frequent at certain ages, and it is helpful to the sleep technologist to be aware of the signs and symptoms of common nonrespiratory sleep disorders seen in each age range. The technologist must also have an understanding of normal sleep patterns for each of the age groups to understand the impact that a sleep disorder can have on the individual’s sleep requirements.
Normal Sleep Patterns for Newborns and Infants
Newborns (0 to 2 Months)
Hours of sleep: 16 to 20 hours per 24 hours. No nocturnal/diurnal pattern in the first few weeks; sleep is distributed throughout the day and night (1).
Infants (2 to 12 Months)
Hours of sleep: nighttime 9 to 12 hours and daytime naps 2 to 4.5 hours. Regular rhythm of periods of sleepiness and alertness will emerge by 2 to 4 months.
Common sleep disorders in this age group include the following:
Colic
Body rocking and headbanging
Sleep-onset association disorder
Colic is one of the most common causes of sleep disturbance in the 3- to 6-month-old infant. Colic appears to be related to digestion and is an often misunderstood condition. The most common form of colic is circadian in nature and begins at approximately 2 to 3 months, resolving spontaneously at approximately 5 to 6 months.
The pediatrician must differentiate colic from milk intolerance or gastroesophageal reflux disease. An important feature of the differential diagnosis is that in colic, the crying has a clear circadian rhythm. The baby does not cry after daytime feedings, but becomes irritable in the evening and fusses inconsolably until around the same time in the late evening or night (2). Parents will often misperceive the “vomiting” that occurs as a result of swallowing air while crying, to be a symptom of a stomach upset. Infants with central or obstructive sleep apnea syndrome may also have frequent arousals with crying, but this occurs during all sleep periods, day or night (1).
Normal Sleep Patterns for Toddlers and Preschool Children
Toddlers (12 Months to 3 Years)
Hours of sleep: 12 to 13 hours per 24 hours. Daytime naps: from two to one nap by age 18 months lasting 30 minutes to 2 hours.
Preschool-Age Children (3 to 5 Years)
Hours of sleep: 11 to 12 hours per 24 hours. Daytime naps: from 1 to none.
Sleep problems occur in 25% to 30% of children in the preschool-age group. This is a time when many developmental changes occur. Naps decrease from two to one by 3 years of age and then to none by age
5. Timing and duration of naps can affect nighttime sleep. The child gives up the bottle and moves to a big bed. At around 3 years, the child develops imagination and fantasy, which can lead to increased night fears. Bedtime routines need to be consistent with a progression toward relaxation. Transitional objects such as blankets, dolls, and stuffed animals help the child learn to self-soothe for sleep onset and after arousals. Parental reassurance that the child is safe is more effective than actions, which reinforce the idea that a “monster” exists (1).
Common sleep disorders in the preschool-age group include the following:
Sleep-onset association disorder/nighttime waking
Limit-setting sleep disorder/bedtime resistance
Rhythmic movement disorders like headbanging, body rocking, and body rolling
Nighttime fears and nightmares
Normal Sleep Pattern for School-Aged Children (5 to 11 Years)
Hours of sleep: 10 to 11 hours per 24 hours.
School-age children may not obtain sufficient sleep, which can lead to behavioral and learning problems. The child may be misdiagnosed with attention-deficit disorder or learning disabilities, particularly in classroom subjects that require complex problem solving or sustained attention (2).
Some of the more common nonrespiratory sleep disorders in the school-age child are as follows:
Sleepwalking and sleep terrors
Bruxism
Insufficient sleep
Inadequate sleep hygiene
Periodic limb movement disorder (PLMD)
Disorders of arousal parasomnias are more frequent in childhood than in adolescence. Estimates of sleep terrors range from 1% to 6%, sleepwalking up to 17% with a peak at 8 to 12 years, and confusional arousals up to 17.3% (1). School-age children with chronic sleep deprivation rarely articulate the need to nap or rest because they don’t know what it feels to be adequately rested.
Bruxism is a movement-type sleep disorder characterized by repetitive grinding or clenching of the teeth during sleep. It is accompanied by scraping and clicking sounds. Bruxism has two distinct patterns, diurnal and nocturnal. Although bruxism is closely related to stress, the two etiologies appear to be different (1). Allergies, cerebral palsy, intellectual disability, alcohol, stimulant medications, and seizure can contribute to bruxism. Adult-type bruxism usually begins in childhood or adolescence; however, most cases of bruxism are self-limiting and may even disappear with the eruption of secondary teeth. Diagnosis rarely involves a sleep study. Bruxism can lead to excessive wear of the teeth, periodontal tissue damage, jaw pain, and headache. Dental appliances, sleeping position, pharmacotherapy, or psychological treatment may be used to alleviate the symptoms (2).
Inadequate sleep hygiene is caused by activities that increase arousal, like caffeinated soda, stimulating television, and play. Napping during the day, nighttime awakenings from periodic limb movements (PLMs), loud noises, and bright lights lead to disorganized and often insufficient sleep for the youngster.
Normal Sleep Pattern for Adolescents (Ages 12 to 18)
Hours of sleep: 9 to 9.5 hours needed but 7 to 7.25 hours obtained.
Sleep disorders seen in this age group include the following:
Insufficient sleep
Inadequate sleep
Insomnia
Delayed sleep phase syndrome
Restless legs syndrome (RLS)/PLMD
Narcolepsy
Kleine-Levin syndrome
Around puberty, hormonal changes cause a daily delay in melatonin secretion. This delay results in a delayed sleep onset of approximately 2 hours. Despite the circadian rhythm delay, the adolescent still needs 9 to 9.25 hours of sleep. With early school start times, extracurricular activities, more independence, part-time jobs, and increasing socialization, adolescents manage an average of 7 to 7.5 hours of sleep, causing them to be chronically sleep deprived. Insomnia may be caused by new social pressures, academic pressures, increased responsibilities, or a bedtime too early for the adolescent’s circadian rhythm (3). Parents and adolescents may attribute the symptoms of RLS or PLMD to growing pains or sports injuries. A polysomnogram is useful in identifying the movements and the extent of related arousals.
Chronic sleep restriction can cause mood disturbances, depression, poor academic performance, attention or memory deficits, risk-taking behavior, and increased involvement in traffic accidents (3). All the previously listed sleep disorders lead to excessive daytime sleepiness. However, narcolepsy has more complex symptomatology.
Narcolepsy is caused by impaired sleep-wake regulation of the central nervous system (CNS). The patient complains of excessive daytime sleepiness, cataplexy (the abrupt loss of muscle tone provoked by strong emotion), hypnagogic hallucinations (vivid auditory or visual “dreams” often frightening), and sleep paralysis (inability to move or speak for a few seconds at sleep onset or offset). Although narcolepsy is reported for all age groups, it is most often reported by teenagers and young adults (4).
Kleine-Levin syndrome (5), or recurrent hypersomnia, is characterized by acute episodes of excessive sleepiness, hyperphagia, and hypersexuality lasting up to several weeks at a time. Kleine-Levin syndrome usually occurs during adolescence and is more common in males. Sleep and behavior are normal between episodes (5).
TECHNICAL CONSIDERATIONS
Technical considerations related to polysomnographic (PSG) testing in the child begin with a consideration of the environment in the sleep center. The sleeping environment should provide separate beds for parent, baby, child, or adolescent. Keep in mind that the parent is usually suffering from sleep deprivation as a result of the child’s problem.
  • A foldaway bed, not a recliner, must be provided to ensure that the parent is rested well enough to take the child home after the polysomnogram.
  • Room temperature should be comfortable for an average adult.
  • The crib slats should be no greater than 23/8 in (6.03 cm) apart.
  • The crib mattress should be firm, tight fitting in the crib, and no comforters or pillows should be used.
  • The American Academy of Pediatrics recommends that the baby be placed on the back, during sleep, to reduce the risk of sudden infant death syndrome (4).
  • Infants can be swaddled or wear mittens, during setup, to prevent them from inadvertently pulling off leads.
  • Place belts under pajama top, bring wires and leads to the side of the infant, and bind them together. Point head leads toward the top of the head and bind together. This placement will allow the infant or child to sleep supine or on one side without lying on wires.
  • Toddlers and children enjoy participating in the setup with the support of a parent. Props, such as flashlights, music, dolls, and stickers, can be used to make the “sleepover event” into a game. Have the toddler sit on the parent(s) lap during setup to help reduce anxiety.
  • Adolescents need to feel informed regarding the purpose of each lead.
  • The pediatric sleep technologist should observe parent-child interactions and document them in the log. An audiovisual recording should be made during setup, polysomnogram recording, and takedown to document all interactions for the sleep specialist.
CLINICAL OBSERVATIONS
The clinical observations made by the technologist during the PSG recording are extremely valuable in the diagnosis of pediatric sleep disorders. The technologist serves as the eyes and ears of the sleep physician and therefore thorough documentation is essential.
The initial assessment of a pediatric sleep disturbance will include the following:
Detailed sleep history from the parents, a home video, if possible, and a sleep diary
Medical history, with a developmental assessment of school functioning
Family history, a psychosocial history, and a behavioral assessment
Physical examination
This information will direct the sleep technologist to focus on the observations most valuable to the sleep physician. The use of video recordings during PSG is important in documenting both parent and child behavior. However, the sleep technologist’s written observations can provide the sleep physician with information regarding how the child feels, what he or she believes is happening, what he or she needs, and whether the family can support his or her needs.
The technologist should document anything out of the ordinary such as the following:
Unusual behavior of the child
Headbanging or rocking
Sleepwalking
Prolonged crying
Hypersomnolence
Hypersexuality
Hallucinations
Sleep paralysis or cataplexy
Unusual behavior of a family member (swearing, yelling, and rough handling)
Unusual eating habits (eating during sleep time and overeating)
Unusual sleeping positions (arched back and sitting up)
Unusual verbalization (screaming, prolonged crying, and words inappropriate for age)
Signs of abuse; bruises (black eyes)
Bed-wetting (sleep stage and parents’ and child’s reactions)
Numerous visits to the bathroom or resistance to bedtime
Clinical Observations in the Infant to Preschool Population (Ages 0 to 5)
Bedtime in the sleep center should be identical to the bedtime in the child’s home, and the nighttime routine should approximate the routine at home as closely as possible. Obviously, the environment is different, but the parent should nevertheless be encouraged to attempt to simulate the environment and bedtime routine. Have the child bring his or her favorite blanket, pillow, pajamas, bedtime snack, and snuggle toy. Document the bedtime routine, use of a night light, bedtime stalling, and the interaction between the parent(s) and the child at or around sleep onset. Some of the most common sleep disorders in this age group are sleep-onset association disorders in which the child’s innate self-quieting skills are replaced by a need for the physical presence of the parent and/or some parental bedtime behavior in order to initiate sleep. The best course in documentation is to describe an observed activity quoting the dialogue between parent and child. The technologist should not write an opinion or make any judgment regarding the activity or event.

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Dec 12, 2019 | Posted by in NEUROLOGY | Comments Off on Nonrespiratory Pediatric Sleep Disorders

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