Related Experiment Video
Updated: Sep 21, 2026

Standardized Measurement of Nasal Membrane Transepithelial Potential Difference (NPD)
Published on: September 13, 2018
Clinical and rhinometric assessment of the nasal airway--do they measure the same entity?
P F Hardcastle1, A White, R J Prescott
1Department of Otolaryngology, Royal Infirmary, Edinburgh.
Abstract:
Multiple regression analysis was used to investigate the relationship between clinical examination of the nasal airway, precisely defined using 16 simple and 9 derived parameters, and active anterior rhinometry. Clinical examination and rhinometry were found to correlate poorly and must be regarded as measuring 2 distinct though related entities.
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