An improved device for posterior rhinomanometry to measure nasal resistance.

Rhinomanometry is a method for measuring nasal resistance for the purpose of providing an objective evaluation of nasal patency. Posterior rhinomanometry is accomplished without the use of a mask, thus allowing the patient to breathe naturally. Here, we report on the improvements we have made to the existing posterior rhinomanometry system. In this system, nasal airflow is measured indirectly by measuring the pressure differential across a small mesh window in the body plethysmograph. We have calibrated this measurement and developed software that automatically provides the correct values for all airflow rates. Also, we have developed software that automatically corrects for the phase shift caused by the plethysmograph structure. These refinements should provide more accurate values for nasal resistance.

[1]  T. Mccaffrey,et al.  Normal Nasal Resistance , 1985, Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery.

[2]  L. Kaufman,et al.  Nasal resistance--a reliable assessment of nasal patency? , 1995, Clinical otolaryngology and allied sciences.

[3]  Clément Pa.  Committee report on standardization of rhinomanometry. , 1984 .

[4]  Yan Guo,et al.  STABLE AND UNSTABLE IDEAL PLANE FLOWS , 2002 .

[5]  P. Cole,et al.  Measurement of airway patency. A manual for users of the Toronto systems and others interested in nasal patency measurement. , 1997, The Annals of otology, rhinology & laryngology. Supplement.

[6]  Norman M. Wereley,et al.  Seismic Control of Civil Structures Utilizing Semi–Active MR Braces , 2003 .

[7]  P. Cole.  Stability of nasal airflow resistance. , 1989, Clinical otolaryngology and allied sciences.

[8]  H. Lenz,et al.  Comparison of different coefficients and units in rhinomanometry. , 1985, Rhinology.

[9]  L. Malm,et al.  Use of pharmacologic decongestion in the generation of rhinomanometric norms for the nasal airway. , 1988, American Journal of Otolaryngology.

[10]  B. Solow,et al.  Rhinomanometric recording in children. , 1980, Rhinology.

[11]  Yasuo Nakajima,et al.  Measurement of methanol crossover in direct methanol fuel cell , 2001 .

[12]  J. Hull,et al.  Magnetic heat pumps for near-room-temperature applications , 1989 .

[13]  B. Jonson,et al.  Rhinomanometry. II. A system for numerical description of nasal airway resistance. , 1982, Acta oto-laryngologica.