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Measurement of the Nasal Airway
Published in John C Watkinson, Raymond W Clarke, Louise Jayne Clark, Adam J Donne, R James A England, Hisham M Mehanna, Gerald William McGarry, Sean Carrie, Basic Sciences Endocrine Surgery Rhinology, 2018
Rhinomanometry normally provides a measure of nasal resistance to airflow and measures of nasal patency in units of nasal airflow may be further calculated from this parameter. Nasal resistance to air flow is calculated from two measurements: nasal airflow and trans-nasal pressure.4 Both these parameters are measured by means of differential pressure transducers (manometers) and this is why the study of nasal pressure and flow is termed ‘rhinomanometry’, since manometry involves the measurement of pressure. Nasal airflow can be measured by means of a flow head that usually consists of a mesh resistance inside a tube. The pressure difference across the mesh generated by airflow through the tube is used to measure airflow. Trans-nasal pressure can be measured by relating the pressure at the posterior nares to that at the entrance of the nostril, which will normally be atmospheric pressure or nasal mask pressure.
In vivo testing
Published in Richard F. Lockey, Dennis K. Ledford, Allergens and Allergen Immunotherapy, 2020
Nasal provocative challenge can also be used to assess the impact of nasal allergen exposure on adjacent structures. Rhinomanometry can be used to measure the degree of nasal obstruction. Evaluation of concomitant eustachian tube obstruction also can be done by sonotubometry, which measures the transmission of sound from the nares, posterior pharynx, through the eustachian tube into the ear [65]. Tympanic membrane motility can likewise be measured following challenge.
In Vivo Testing for Allergic Diseases
Published in Richard F. Lockey, Dennis K. Ledford, Allergens and Allergen Immunotherapy, 2014
Nasal provocative challenge can also be used to assess the impact of nasal allergen exposure on adjacent structures. Rhinomanometry can be used to measure the degree of nasal obstruction. Evaluation of concomitant Eustachian tube obstruction also can be done by sonotubometry, which measures the transmission of sound from the nares, posterior pharynx, through the Eustachian tube into the ear [51]. Tympanic membrane motility can likewise be measured following challenge.
Asthma and rhinitis in Greek furniture workers
Published in Journal of Asthma, 2021
Katerina Paraskevaidou, Konstantinos Porpodis, Theodoros Kontakiotis, Ioannis Kioumis, Dionisios Spyratos, Despina Papakosta
Anterior active rhinomanometry was used to measure nasal flow (29) with rhinomanometer Rhinotest 2000 plus (EVG Electronic Vertriebs GmbH, Bohl-Iggelheim, Germany). Each subject was breathing quietly in the sitting position via an air-tied face mask with one nostril open and an intranasal sponge with a catheter—probe into the other nostril for transferring the pressure variations to the device. This probe, positioned to the nasal chamber, captures the airflow using a pneumotachograph. In the computer screen, real time, linear graph of pressure, and flow is done and nasal flow chart displayed (vertical axis, cm3/s) versus the pressure difference between the inlet of the free nostril and the pressure recorder located in the nasal funnel of the closed nostril (horizontal axis, Pa). The resistance of each nasal chamber was calculated from the pressure difference quotient to flow, under the assumption that the air flow was linear. Flow was measured at a transnasal pressure of 150 Pa and reported as nasal flow sum (adding flow for both nostrils) in cm3/s increased resistance indicated rhinitis (29).4. Methacholine challenge test
Nasal floor augmentation for empty nose syndrome
Published in Acta Oto-Laryngologica Case Reports, 2022
Munetaka Ushio, Junko Ishimaru, Sayaka Omura, Yasushi Ohta, Mitsuya Suzuki
Rhinomanometry (Rhinorheograph MPR-3100; Nihon Kohden, Tokyo, Japan) by the mask anterior method during normal inspiration and expiration was performed before and after surgery to assess changes in nasal resistance. Bilateral nasal resistance at a nasal pressure of 100 Pa was recorded three times, and the mean value was used for the analysis. Rhinomanometry can measure the airflow velocity through the nasal cavity and the difference in pressure between the nostril and nasal choana during normal inspiration and expiration through the nose. Based on the hydrodynamic equation (resistance = pressure difference/velocity of flow), the nasal resistance was calculated.