The BreatheBite mouthpiece securely places the tongue below the lip for spirometry maneuvers.
The BreatheBite combines the flange-style mouthseal with a built-in tongue depressor and a bilateral bite block to achieve superior air flow during expiration and inspiration. The built-in bite block on both sides sit near the lateral incisor and the canine to prevent the teeth obstruction the air flow.
An obstruction of the mouthpiece by the tongue may lead to misshapen curves and reduced FEV1 and FEV1/FVC that could be misinterpreted as "obstructive impairment."1 Such an obstruction can also underestimate or overestimate FEV1 and FEV1/FVC and render them "neither acceptable or usable."2
1. 2012 NIOSH Spirometry Quality Assurance: Common Errors and Their Impact on Test Results
2. Standardization of Spirometry 2019 Update, Am J Respir Crit Care Med Vol 200, Iss 8, pp e70–e88, Oct 15, 2019