Studies Using Snap

A comparison of polysomnography and a portable home sleep study in the diagnosis of obstructive sleep apnea (OSA) syndrome

Su S, Baroody FM, Kohrman M, Suskind D. Otolaryngol Head Neck Surg. 2004 Dec; 131 (6): 844-850

In a study conducted by the University of Chicago Sleep Disorder Clinic, 60 patients underwent a Snap test and traditional polysomnography (PSG) on the same night. The authors concluded that the Snap home sleep study has good sensitivity, specificity, positive and negative predictive values, and "is an excellent tool for the diagnosis of OSA."

Validations of a portable home sleep study with twelve-lead polysomnography: Comparisons and insights into a variable gold standard

Michaelson PG, Allan P, Chaney, J, Mair EA. Ann Otol Rhinol Laryngol. 2006 Nov; 115 (11): 802-809

In a study conducted by the Sleep Center at Wilford Hall United States Air Force Medical Center, 59 patients concurrently underwent a Snap test and twelve-lead polysomnography (PSG). The authors concluded that the correlation between the Snap home sleep study and PSG demonstrates that the Snap Test is "a suitable alternative to traditional PSG." The authors further noted that the home test reduces test cost, decreases patient wait times, increases convenience, and is statistically proven to be accurate.

Night-to-night fluctuations in sleep apnea severity: diagnostic and treatment implications

Dzierzewski JM, Dautovich ND, Rybarczyk B, Taylor SA. J Clin Sleep Med. 2020 Apr; 16 (4): 539-544

In a retrospective cohort study from Virginia Commonwealth University, 47,423 adults completed two nights of testing using a Snap home sleep test. Over one-third of patients exhibited clinically meaningful fluctuations in sleep apnea severity across the two nights. The authors recommended "a second night of sleep testing" to enhance diagnostic accuracy and minimize the risk of missed diagnoses.

Acoustical analysis of snoring: Can the probability of success be predicted?

Brietzke SE, Mair EA. Otolaryngol Head Neck Surg. 2006 Sep; 135 (3): 417-420

A Walter Reed Army Medical Center study evaluated 53 snoring patients with a Snap test prior to palatal stiffening procedures. The authors concluded that "identifying patients with predominant palatal flutter snoring significantly increases the probability of subjective treatment success."

Acoustical analysis of pediatric snoring: What can we learn?

Brietzke SE, Mair EA. Otolaryngol Head Neck Surg. 2007 Apr; 136 (4): 644-648

A database analysis of 456 pediatric patients using Snap acoustical assessment demonstrated that "pediatric snoring is objectively related to OSAHS severity," with increased snoring index and loudness correlating to disease severity.

An anatomically based analysis of objectively measured pediatric snoring: A pilot study

Brietzke SE, Pusz MD. Otolaryngol Head Neck Surg. 2015 Mar; 152 (3): 561-566

A Walter Reed National Military Medical Center prospective study of 22 pediatric snoring patients with pre- and post-surgical Snap testing found that "pediatric snoring has different acoustical characteristics than adult snoring" and is associated with BMI, turbinate size, and palatal obstruction.

An epidemiologic study of snoring and all-cause mortality

Rich J, Raviv A, Raviv N, Brietzke SE. Otolaryngol Head Neck Surg. 2011 Aug; 145 (2): 341-346

A Walter Reed analysis of more than 77,000 Snap test patients examined snoring without OSA and its associations with mortality, concluding that increased snoring in non-obese patients without OSA is associated with elevated all-cause mortality.

All-cause mortality and obstructive sleep apnea revisited

Rich J, Raviv A, Raviv N, Brietzke SE. Otolaryngol Head Neck Surg. 2012 Sep; 147 (3): 583-587

A Walter Reed 77,000+ patient database study determined that "increasing apnea severity is independently associated with modestly increased all-cause mortality in patients younger than 50 years."

Evaluation of criteria for uvulopalatoplasty (UPP) patient selection using acoustic analysis of oronasal respiration (SNAP testing)

Weingarten CZ, Raviv G. J Otolaryngol. 1995 Dec; 24 (6): 352-357

A study evaluating Snap acoustic parameters for UPP candidate selection identified predictive thresholds: velum-like snoring loudness >12 dB and low-frequency dominance >85% correlated with snoring relief.

Injection snoreplasty: Extended follow-up and new objective data

Brietzke SE, Mair EA. Otolaryngol Head Neck Surg. 2003 May; 128 (5): 605-15

A Walter Reed extended follow-up of palatal stiffening procedures with Snap perioperative analysis found that "success and snoring relapse rates of injection snoreplasty are similar to those for other current treatments" while remaining "effective, safe and inexpensive." The authors concluded that preprocedure Snap analysis predicts treatment response.

Injection snoreplasty: How to treat snoring without all the pain and expense

Brietzke SE, Mair EA. Otolaryngol Head Neck Surg. 2001 May; 124 (5): 503-10

Injection snoreplasty: Investigation of alternative sclerotherapy agents

Brietzke SE, Mair EA. Otolaryngol Head Neck Surg. 2004 Jan; 130 (1): 47-57

Does an oral appliance reduce palatal flutter and tongue base snoring?

Stouder S, Jones L, Brietzke S, Mair EA. Otolaryngol Head Neck Surg. 2007; 136 (5): 827‐831

A Wilford Hall Medical Center study of mandibular advancement oral appliances with baseline and post-treatment Snap analysis demonstrated statistically significant snoring parameter improvements, concluding oral appliances "exert an effect on palatal snoring."