THE ROLE OF POLYSOMNOGRAPHY (HOME SLEEP STUDY LEVEL III DEVICE) IN EVALUATION OF LEVELS OF UPPER AIRWAY OBSTRUCTION IN CASES OF OBSTRUCTIVE SLEEP APNOEA HYPOPNOEA SYNDROME: A STUDY

Abstract

OBJECTIVEPolysomnography is a gold standard in diagnostic workup of obstructive sleep apnoea. Anatomical sites of obstruction in an OSA patient are known by anterior rhinoscopy, FLP scopy with Muller's manoeuvre and end expiratory tongue position to know the levels of obstructions at nose and nasopharynx (Level 1), velopharyngeal sphincter and oropharynx (Level 2), tongue base and superior hypopharynx (Level 3), larynx and inferior hypopharynx (level 4) and guides the making of a tailor made surgical plan in individual cases. This prospective study aimed at the comparison of levels of block with polysomnography parameters.STUDY DESIGNThis is a prospective single center observational study, enrolled 50 consecutive patients between 2012 and 2014.METHODSAll 50 patients diagnosed as snoring with a possibility of OSA underwent level 3 PSG study. Levels of obstructions noted by clinical examination and FLP scopy with Muller's manoeuvre and end expiratory tongue position. Variability in PSG parameters with single level and multilevel blocks were analysed.