Active posterior rhinomanometry by means of a fine nasal catheter for obtaining postnasal pressure.

Nasal airflow resistance measurement: forced oscillation technique versus posterior rhinomanometry.

This study was designed to determine whether nasal airflow resistance (Rn) which is nonlinear during tidal breathing, can be assessed by the forced oscillation (FO) technique. Rn values obtained by the FO technique and extrapolated to 0 Hz (Rn,FO) were compared to those assessed by posterior rhinomanometry at maximal tidal inspiratory flow (Rn,m), at a 0.5 L x s(-1) flow (Rn,F), and at a 1 hPa ...

Computerized rhinomanometry: a study of total nasal resistance normal values.

Computerized rhinomanometry with the practical software programmes is used widely as a research tool to evaluate objectively nasal air flow and resistance parameters, while the increase of its clinical application may be facilitated by further standardization of the method. The aim of the study was to determine the total nasal resistance normal values in healthy adult population using a method ...

Chapter 4 : Rhinomanometry and nasal challenge

The change in airway resistance along the nasal passage can be determined by passing a pressure sensing cannula carefully along the passage and determining the pressure-flow relationships during quiet breathing (Bridger and Proctor, 1970). Using this technique, Haight and Cole (1983b) clearly demonstrated that the major site of nasal resistance lies at the anterior end of the inferior turbinate...

Active anterior rhinomanometry in paediatrics. Normality criteria.

BACKGROUND Active anterior rhinomanometry with a face mask was used to establish the lower age limit for application of the technique, define normality reference standards, and determine the most appropriate pressure for referencing the nasal resistance values. MATERIAL AND METHODS A total of 409 children of both sexes and aged 5-14 years were studied. The subjects were selected from among he...

Obtaining a catheter specimen of urine.