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Sleep Disorders
Volume 2016, Article ID 7380874, 8 pages
Research Article

Five-Minute Awake Snoring Test for Determining CPAP Pressures (Five-Minute CPAP Test): A Pilot Study

1Department of Psychiatry and Behavioral Sciences, Division of Sleep Medicine, Stanford Hospital and Clinics, Redwood City, CA 94063, USA
2Department of Otolaryngology, Division of Sleep Surgery and Medicine, 1 Jarrett White Road, Tripler Army Medical Center, Honolulu, HI 96859, USA
3Department of Psychiatry and Behavioral Sciences, Stanford University, School of Medicine, Stanford, CA 94304, USA
4Department of Otolaryngology-Head and Neck Surgery, Bharati Vidyapeeth Deemed University Medical College, Pune 411030, India
5Department of Otolaryngology-Head and Neck Surgery, Division of Sleep Surgery, Stanford Hospital and Clinics, Stanford, CA 94304, USA
6Department of Otorhinolaryngology, Sleep Medicine Centre, Hospital CUF, 4100-180 Porto, Portugal
7Centre for Research in Health Technologies and Information Systems (CINTESIS), University of Porto, 4200-450 Porto, Portugal

Received 9 September 2015; Revised 10 December 2015; Accepted 17 December 2015

Academic Editor: Liborio Parrino

Copyright © 2016 Macario Camacho et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objective. To develop a quick, simple, bedside test for determining continuous positive airway pressures (CPAP) for obstructive sleep apnea (OSA) patients. Study Design. Prospective case series at a tertiary medical center. Methods. The Five-Minute Awake Snoring Test for Determining CPAP (Five-Minute CPAP Test) was developed and tested. Patients wear a soft-gel nasal triangle mask while holding a tongue depressor with the wide section (1.75 cm) between the teeth. Fixed pressure nasal CPAP is applied while the patient simulates snoring at 4 centimeters of water pressure. The pressure is incrementally titrated up and then down to determine the lowest pressure at which the patient cannot snore (Quiet Pressure). Results. Overall, thirty-eight patients participated. All could simulate snoring. Correlation coefficients were statistically significant between Quiet Pressures and body mass index ( [strong positive relationship], ), apnea-hypopnea index ( [moderate positive relationship], ), lowest oxygen saturation ( [moderate negative relationship], ), and oxygen desaturation index ( [strong positive relationship], ). Conclusion. This pilot study introduces a new concept, which is the final product of over one year of exploration, development, and testing. Five-Minute CPAP Test is a quick, inexpensive, and safe bedside test based on supine awake simulated snoring with nasal CPAP.