Q4 2018 Investor Presentation

What is Sleep-Disordered Breathing? • • Abnormal respiration during sleep - the cessation of breathing or "sleep suffocation" Most prevalent is obstructive sleep apnea - collapse of the upper airway despite ongoing effort Other types include central sleep apnea -- lack of breathing and lack of effort -- and mixed apnea Normal airway Partially obstructed airway Obstructed airway Arousal © 2018 ResMed I Q4 2018 Investor Presentation | 8 ResMed

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