GM Instruments, Ltd. is one of the world’s leading manufacturers of Nasal Congestion Measurement and Respiratory Flow Measurement products. Based in the United Kingdom, with a US office and a global distribution network, the company was founded in 1992 by Eric Greig and has been at the forefront of the development of new and innovative products for the nasal measurement, audiometry and respiratory flow markets. Training videos for the A1 Rhinometer (measuring nasal structure) and the NR6 (measuring nasal function and resistance) are available on our website.
Dr. Karen Davidson has held many positions in the medical device industry over the past 25 years, specifically in the ENT and Sleep markets, in addition to 29 years of clinical experience to include service as a Flight Nurse in the United States Air Force Reserves and committee member for various Otolaryngology meetings. Dr. Davidson serves as the Vice President at GM Instruments, Ltd. with a special interest in and published on the technology of objective nasal measurements, nasal physiology, clinical application, reimbursement, health economics, and health policy. She is an adjunct professor at Central Michigan University, Health Administration Division, School of Health Professions, and Liberty University, School of Health Sciences and research partner with the Harrison COVID-19 Research Group. She is a graduate of UNC Chapel Hill School of Nursing, University of Phoenix, and Central Michigan University, and the recipient of Central Michigan University’s Outstanding Dissertation Award for academic research on her topic “Factors Associated with Determining CPT 92512 as Experimental and Investigational Among Third Party Payors”. Dr. Davidson is currently a co-author and contributing author of four books about nasal function and resistance and is a speaker for “The Nose Knows” series.