GM Instruments was formed in 1992 by Eric Greig to concentrate on the design and supply of specialist ENT (ORL) electronic instruments and accessories. The initial instrument range focussed on applications which required flow and pressure measurements but rapidly expanded into 3 product categories: Audiometry, Nasal Congestion measurements and Respiratory Flow measurements.
Innovation, prompted by PC development and interaction with medical people working in the field, led to the first versions of the ASRA (automatic self recording audiometer).
NR6 Rhinomanometer
Rhinomanometry records nasal function and has been available to clinicians for many years. Recent developments have included visual guidance to suggest whether airway resistance results achieved lie between normal and severely obstructed bands, therefore assisting in diagnosing nasal conditions and allergic responses. The recent addition of so called four-phase measurements, which include Vertex and Effective resistance values, correlate well with the subject’s impression of blockage.
A1 Acoustic Rhinometer
Acoustic Rhinometers allow a very rapid non invasive examination of the nasal cavity using a sound pulse technique. Acoustic Rhinometry was developed originally during a joint collaborative project between the Universities of Aarhus (Denmark) and Boston (USA).
GM Instruments was invited to commercialise the system, and has been actively working with interested parties to update and improve the measurement since then. A Rhinometer quantifies nasal structure and measures this in terms of absolute levels and the effect of interventions, thus allowing % change to be recorded.
NV2 Rhinospirometer
The NV2 Rhinospirometer is an advanced, stand-alone medical device designed for detailed analysis of nasal airflow. It precisely measures the distribution of airflow between the two nasal passages, offering critical data for diagnosing and treating various nasal and respiratory conditions. By providing a Nasal Partitioning Ratio (NPR), the device enables healthcare professionals to assess the balance of airflow through each nostril. This information is crucial for identifying obstructions, deviations, or other anomalies within the nasal passages, thus facilitating more accurate and effective treatment plans. The NV2 Rhinospirometer’s user-friendly interface and reliable performance make it an essential tool in both clinical settings and research environments.
Peak Nasal Inspiratory Flow Meter
Our Peak Nasal Inspiratory Flow (PNIF) Meter is lightweight, compact and a simple way to inspect the patency of a patients nose.
Measurements can be generated from a single inspiratory manoeuvre using both nostrils simultaneously, or by using each nostril in turn, to provide a simple indication of obstruction, although care must be taken due to variability in subject efforts, and the possible effect of nasal valve collapse.
