1. COUNTERPOINT: Is the Apnea-Hypopnea Index the Best Way to Quantify the Severity of Sleep-Disordered Breathing? No 
Naresh M. Punjabi, MD, PhD, FCCP 
CHEST 
Volume 149, Issue 1, Pages (January 2016)
DOI: /chest
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2. Figure 1
Illustrative tracing from a patient with prolonged hypopneas. SpO2 = oxygen saturation as measured by pulse oximetry.
CHEST  , 16-19DOI: ( /chest )
Copyright © 2016 American College of Chest Physicians Terms and Conditions