Rhinomanometry, unlike rhinometry, is a form of manometry that uses pressure and flow sources from a transducer box to objectively measurement nasal function by the intranasal pressure and the rate of airflow during active breathing. Four-phase anterior and posterior rhinomanometry (GM Instruments, Ltd.), FDA approved in 1990, (K902120) is the only non-invasive, parameter-based technology for measuring nasal function in the sitting and supine positions.
In 2010, the Standardization Committee on the Objective Measurement of the Upper Airway published 4-Phase-Rhinomanometry Basics and Practices in the Supplement of Rhinology. In 2015, the Committee updated the standards of practice to declare classic, non 4 phase, rhinomanometry obsolete and confirmed subjective symptoms comparable and compatible to 4-phase rhinomanometry.
The first measurements of nasal flow limitations were taken in 1894 with the use of a refrigerator plate to measure the amount of vapor in exhaled air, the first rhinomanometer did not become computerized until 1970. Over time, transnasal pressures and the correlation to OSA and disease progression have been studied as many in the medical field find AHI losing relevance as the primary diagnostic metric of OSA.
Dr. Karen Davidson, DHA, MSA, M.Ed., MSN, RN
Founder of FACT Healthcare Consulting Group, and creator of the DAFNE Scoring System©