Forced Oscillation Technique measurement apparatus using fan-speaker hybrid

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 ...

Measurement of bronchial responsiveness by forced oscillation technique in occupational epidemiology.

The performance of the forced oscillation technique (FOT) in the assessment of bronchial responsiveness on the methacholine challenge test was compared with that of forced expiratory volume in one second (FEV1) in 119 active workers with normal baseline pulmonary function. Changes in resistance (delta R0%), frequency dependence of resistance (delta P) and resonant frequency (delta F%) determine...

Automated system for direct measurement and feedback of total respiratory resistance by the forced oscillation technique.

Measurement of total respiratory resistance using oscillation technique.

Clicks, honks, and whoops. D. Pickering (Rad-cliffe Infirmary, Oxford). Three cases are described which were originally diagnosed as having ventricular septal defect, pulmonary stenosis, and innocent prae-cordial honk. These have been reinvestigated using pixie accelerometer, phonocardiographic techniques (Bew et al., 1971). All three have been shown to have clicks which move with posture, Vals...

Use of the forced-oscillation technique to estimate spirometry values

PURPOSE Spirometry is sometimes difficult to perform in elderly patients and in those with severe respiratory distress. The forced-oscillation technique (FOT) is a simple and noninvasive method of measuring respiratory impedance. The aim of this study was to determine if FOT data reflect spirometric indices. PATIENTS AND METHODS Patients underwent both FOT and spirometry procedures prior to i...