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Chapter-65 Sleep Apnoea Syndrome and Snoring

BOOK TITLE: Textbook of Ear, Nose & Throat

Author
ISBN
9788180614460
DOI
10.5005/jp/books/10907_65
Edition
1/e
Publishing Year
2005
Pages
2
Author Affiliations
Chapter keywords

Abstract

This chapter discusses sleep apnoea syndrome and snoring, where snoring is a noisy breathing of a person during sleep which disturbs the other persons around him. Snoring occurs due to airway obstruction during sleep in inspiration causing vibration of soft tissues of oropharynx. Sleep apnoea syndrome (SAS) is characterised by 30 apnoeic episodes each lasting for 10 sec or more in a sleep of about 6-7 hours. Important causes of SAS may be upper airway obstruction, obesity, alcoholism, hypertension, and drugs. Nocturnal polysomnography investigation includes ENG, EEG, ECG and pulse oximetry to see oxygen saturation levels. Muller’s sign is a reverse Valsalva’s sign where the patient pinches his nose and performs swallowing movements, where movements of the uvula are noted with endoscope. Respiratory disturbance index (RDI) in obstructive sleep apnoea (OSA) is the sum of number of apnoeas and hypoapnoeas number per hour.

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