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Seasonal Variations Can Increase Viral Respiratory Infections in Children
  • USA - English


News provided by

Chemist Direct

Sep 20, 2013, 10:00 ET

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Asthma, Allergies, and Respiratory Infections may affect children's breathing during sleep
Asthma, Allergies, and Respiratory Infections may affect children's breathing during sleep

London (PRWEB UK) 20 September 2013 -- A good night's sleep is a necessary part of a child's development, but with the start of the school year many children develop sleep breathing disorders that can impair their academic performance and cause their mental and physical development to suffer.

Previous studies have confirmed an increase of sleep-disordered breathing during the winter and spring, which caused researchers to believe that asthma, allergies, and respiratory infections contributed to disorders that affect children's breathing during sleep.

A child suffering from a sleep disorder may experience symptoms such as snoring, a feeling of tiredness on waking, excessive sleepiness during the day, poor work performance, and difficulty with concentration.

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Now, in a new study conducted at the Paediatric Sleep Centre at the Tel Aviv Sourasky Medical Centre and published in the journal Sleep Medicine, Dr. Riva Tauman and her fellow researchers of the Sackler Faculty of Medicine at Tel Aviv University have shown that asthma and allergies do not contribute to paediatric sleep-disordered breathing.

"We knew from research and clinical practice that sleep-disordered breathing in children gets worse during the colder months," Dr. Tauman says. "What we didn't expect is that the trend has nothing to do with asthma or allergies." Based on their findings, the researchers speculate that viral respiratory infections -- which are more prevalent in younger children and during colder months -- are the major contributor to the seasonal variability seen in pediatric sleep-disordered breathing. 1

"Sleep-disordered breathing" is a blanket term for a group of disorders. One of the common disorders is obstructive sleep apnea, in which the upper airway becomes blocked, usually by enlarged tonsils or adenoids, causing snoring and, in more severe cases, breathing pauses that lead to poor-quality and fragmented sleep and decreased oxygen and elevated carbon dioxide levels in the bloodstream. In the long term, sleep-disordered breathing in children can cause stunted growth, heart disease, and neurocognitive problems associated with diminished school performance, impaired language development, and behavioral issues.

In their study, Dr. Tauman and her Sackler Faculty of Medicine colleagues Michal Greenfeld and Yakov Sivan statistically analyzed the cases of more than 2,000 children and adolescents who were referred to the sleep center to be tested for suspected sleep-disordered breathing between 2008 and 2010.

Confirming earlier results of a 2011 study of five- to nine-year-olds, the researchers found that pediatric sleep-disordered breathing is worse in the winter -- which in Israel they defined as from November to March -- than in the summer. The seasonal variability is most apparent in children less than five years old, they found. The researchers also found that wheezing and asthma do not contribute to the trend. 2

If the sleep clinic tests had all been conducted in the winter, the researchers estimate that seven percent more children would have been diagnosed with sleep-disordered breathing. Seven percent fewer would have been diagnosed if all the tests had been done in the summer, they estimate.

"Our study suggests that if a child comes into the sleep laboratory in the winter with a mild case, I may consider not treating him. I can assume he will be better in the summer," said Tauman. "But if he has only mild symptoms in the summer, I can assume they are more severe in the winter."

The researchers say the study has broad implications for the treatment of sleep-breathing disorders in children, bolstering the idea that the time of year is relevant when treating children for sleep-disordered breathing in borderline cases. 3 Omar El-Gohary, ChemistDirect Superintendent Pharmacist states: “A typical treatment for this condition is positive airway pressure therapy which involves pressurised air being forced into the lungs”.

El-Gohary adds: “A child suffering from a sleep disorder may experience symptoms such as snoring, a feeling of tiredness on waking, excessive sleepiness during the day, poor work performance, and difficulty with concentration. If these symptoms are more prevalent in winter months the underlying cause may be viral. If your child is experiencing any of these symptoms you should contact your GP”.

References

1) http://www.aftau.org/site/News2?page=NewsArticle&id=19129
2) http://www.sleep-journal.com/article/S1389-9457(13)00221-9/abstract
3) http://www.sciencedaily.com/releases/2013/09/130917125032.htm

Samantha Smith, Chemist Direct, +44 1215414952 205, [email protected]

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