A NEW instrument for the measurement of the aerodynamic resistance of the human nasal passages which will be helpful in the diagnosis of nasal respiratory insufficiency (NRI), has been developed in a joint effort by the Oto-Rhino-Laryngology Clinic of the University of Belgrade and the Laboratory for Heat Transfer of the Institute for Nuclear Science "Boris Kidric," Belgrade. This instrument, the rhinoresistometer, was conceived by Dr. M. M. Novaković who has also suffered from NRI.
The method of measurement of nasal resistance by the resistometer is a new method based on the comparison between the known and the unknown resistance. The principle is evident from Fig 1-3. The measurement is based on the fact that the same air flow expired (or inspired) through the nose is conducted through a known variable resistance (Rm). The value of unknown nasal resistance (R
Miodrag Novaković, Srecko Podvinec, Miodrag Simonović. Rhinoresistometer. Arch Otolaryngol. 1968;87(6):665–666. doi:10.1001/archotol.1968.00760060667022