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Updated: Aug 9, 2026

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Standardized Measurement of Nasal Membrane Transepithelial Potential Difference (NPD)
Published on: September 13, 2018
Measurement of nasal displacement by photography
1ENT Department, Royal Free Hospital, London.
The Journal of Laryngology and Otology
|March 1, 1992
Abstract:
A simple photographic method of assessing a commonly encountered nasal deformity has been devised. The method described is of use in quantifying a subjective appearance and in assessing the result of surgery.

