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Nasal Airway Resistance Computer
The Laryngoscope, 1977An analogue computing system for the measurement of nasal airway resistance (Rn) has been developed. The instrument operates on the principle of measuring the transnasal pressure required to generate a measured nasal airflow rate. The system computes and displays inspiratory or expiratory nasal airway resistance measured at a preselected flow rate. The
L H, Hamilton, N T, Christman
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Nasal resistance during infancy
Respiration Physiology, 1978Nasal Resistance (Rn) was measured in 30 Caucasian and 13 Negro infants during the 1st year of life, using an adaptation of the posterior rhinomanometric method. Concurrent measurements of Thoracic Gas Volume (TGV) and Airway Resistance during nose breathing (Raw (n) were made using the plethysmographic technique.
J, Stocks, S, Godfrey
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Nasal Resistance and Nasal Valve Area
American Journal of Rhinology, 1995The nasal valve is considered to be the primary flow-limiting segment of the normal upper airway. We examined subjects with and without nasal pathology to determine whether nasal airway resistance, as determined by rhinomanometry, could be related to clinically measurable geometrical characteristics of the nasal valve.
Saul Frenkiel +2 more
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Tailored Nasal Surgery for Normalization of Nasal Resistance
Facial Plastic Surgery, 1996The nose acts as a physiologic airway resistor, accounting for around 50% of total airway resistance. Adequate nasal resistance is essential not only for correct functioning of the nose but to ensure normal pulmonary physiology. Pathological nasal resistance is determined by alterations in the shape and volume of the nasal cavities that singly or in ...
G, Sulsenti, P, Palma
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Nasal resistance?a reliable assessment of nasal patency?
Clinical Otolaryngology, 1995This study was undertaken to determine the distribution of nasal resistance in a healthy white population. One hundred subjects without nasal complaints were selected for the investigation. The test subjects were divided into two groups on the basis of anterior rhinoscopy. Group 1 included 60 subjects with rhinoscopically normal noses. Group 2 included
Szucs, Eva +2 more
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Effects of Nasal Prongs on Nasal Airflow Resistance
Chest, 2000The aim of this study was to investigate whether nasal prongs, which have been proposed to assess nasal flow during sleep, affect nasal airflow resistance (NR).NR was estimated by posterior rhinomanometry at a 0.5 L/s flow, under eight conditions: in the basal state, and with seven different nasal prongs.The study was performed in 17 healthy supine ...
A M, Lorino +6 more
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Measurement of nasal airway resistance
Journal of Allergy, 1965Abstract A measure of nasal airway resistance can be obtained by simultaneously relating transnasal pressure drop and the rate of nasal air flow. Resistance varies continuously throughout the range of attainable flows, and it has meaning only in relationship to specified rates of flow at which it is measured. The procedure described appears to provide
W R, SOLOMON +4 more
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Cyclical Changes in Nasal Resistance
Archives of Otolaryngology - Head and Neck Surgery, 1970AT ANY given instant, most individuals have a unilateral nasal obstruction. This obstruction is a normal physiological phenomenon due to turbinate engorgement. The obstruction changes in a cyclical manner from side to side throughout the day and night and yet the individual is usually unaware of this occurrence. So complete is the unilateral occlusion,
J J, Principato, J M, Ozenberger
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Dynamic Changes of Nasal Resistance
Annals of Otology, Rhinology & Laryngology, 1979Fifty human subjects were studied and evaluated utilizing posterior rhinomanometry techniques. The main purpose of the investigation was to study the physiologic dynamic range of nasal resistance so that the data might serve as a baseline, not only for evaluation and diagnosis of pathologic states but also for the assessment of nasal responses to ...
M, Hasegawa, E B, Kern, P C, O'Brien
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Nasal surgery and airway resistance
The Laryngoscope, 1979AbstractThis study investigates the effects of surgery and bronchodilatation on nasal and pulmonary resistance. The plethysmograph is evaluated as a clinical tool for nasal flow studies. The method of adapting the plethysmograph to measure nasal resistance is presented.Discriminant Function Analysis considers the effects of surgery and ...
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