Signs of Sleep-Disordered Breathing (SDB) in Children

THIS IS THE MOST COMMON TYPE OF SLEEP DISORDER IN CHILDREN, AFFECTING ABOUT 5% OF THEM. BUT WHAT DOES IT MEAN AND WHAT DOES A PARENT NEED TO KNOW?

SDB includes two conditions, namely, Obstructive Sleep Apnoea (OSA) and snoring.

OSA is a condition that occurs when the upper airway is too narrow or is otherwise obstructed, leading to excess effort in breathing, snoring, lapses in breathing, and an inability to maintain adequate oxygen saturation during sleep.

The most common causes of upper airway narrowing or obstruction are large adenoids and tonsils, blocked nose from an allergy or infection, a deviated nasal septum, and large nasal turbinates. Another possible cause is a congenital abnormality of the facial or jaw bones.

PARENTS’ ALERT: SDB SIGNS

Noisy, irregular or laboured breathing, sometimes with pauses

Mouth-breathing. Children are obligate nose breathers, and mouth-breathing increases air resistance

Restless sleep. Tossing and turning, sitting up and perspiring during sleep

Chest retraction

Bruxism (habitual teeth-grinding)

Bed-wetting

Difficulty in waking up

Daytime sleepiness

Morning headache

Irritability, moodiness and inattention, with poor school performance

ADHD (attention deficit hyperactivity disorder)

Failure to thrive. Healthy growth is dependent on a growth hormone produced in the child’s brain during good sleep. Excessive expense of energy in respiratory and cardiovascular efforts in SDB affects a child’s growth

‘Adenoid facies’ or ‘long face’ syndrome. The way that a child holds his mouth in his first five years will contribute significantly to shaping the musculoskeletal developmentof the face, jaw and teeth. A mouth-breather and snorer will develop ‘long face’ syndrome, which will remain into adult life. These features may lead toOSA in adulthood

HOW TO MINIMISE SDB RISK

Ensure sleeping environments are free from allergens such as dust, mould, animal dander and smoke
Prevent obesity in your child. Fat ‘strangulates’ the airway
Ensure your child is not consuming too much food and drink before bedtime, and is not excited before sleep
Encourage sleeping on the side and not on the back, which narrows the upper airway as the soft palate and tongue fall backwards and obstruct the airway Establish a fixed time for bed

Parents should be aware and look out for all the abovementioned tell-tale signs of this condition.

DIAGNOSIS

In most cases, a detailed history from the parents, and a video recording of the child’s sleep, together with a thorough clinical examination and videorhinolaryngoscopy (VRL) would be sufficient to decide the best treatment option. VRL is an extremely important tool for identifying the site(s) of airway obstruction. This procedure is available in most ENT clinics.

Polysomnogram or night time monitoring of respiratory, cardiac and brain activity may also be recommended.

CURE OPTIONS

Unlike adult cases, the majority of childhood SDB cases can be easily cured. In milder cases, certain lifestyle modifications may be all that are needed, such as sleeping on the side, a dustand smoke-free environment, regular sleep time, avoidance of a full stomach before bedtime, weight reduction, and treatment of nasal obstruction so as to avoid mouth breathing.

Allergic rhinitis and sinus infection causing nasal obstruction can often be treated and controlled medically.

When lifestyle modifications fail, the airway obstruction must be eradicated medically or surgically, and that would cure most cases.

The common surgical treatments for airway obstruction are tonsillectomy, adenoidectomy and turbinate reduction surgery.

In cases that are hard to treat, CPAP (Continuous Positive Air Pressure) therapy would be necessary: the child wears a mask over the nose and sometimes the mouth, which is linked to a special air pump to assist respiration during sleep.

In extremely rare and severe cases like those involving facial and jaw deformity, tracheostomy may be needed when all other treatments fail.

Sleep Disorders and Kids

Statistics over the last 25–35 years have shown the incidence of SDB to be about 5% in children. There were hardly any statistics before this, as the condition was not well recognised or understood, and was often left undiagnosed and untreated.Most doctors at that time deemed snoring and SDB normal and harmless.

Rather than the incidence of SDB increasing, it is more likely that Paediatric ENT doctors are now more aware and have a deeper understanding of the condition, and are better equipped to recognise and diagnose it.

Dr Lau Chee Chong Senior Consultant,
Ear Nose Throat, Head & Neck Surgery

Dr Lau Chee Chong at Mount Elizabeth Centre treats both adults and children. His practice covers all areas diagnostic, surgical and medical of ENT, head and neck practice. The clinic is well-equipped for almost all ENT procedures to be done in-clinic, including NBI (Narrow Band Imaging) video rhinolaryngoscopy, which gives very clear images and is particularly effective in identifying early-stage nose, head and neck cancers.