developing a new type of pneumotachograph
, assessing its quality, automatization of total lung capacity measurement by the helium-dilution method, etc.) [4-6].
Yanowitz, "Effect of [O.sub.2], [N.sub.2], and C[O.sub.2] composition on nonlinearity of Fleisch pneumotachograph
characteristics," Journal of Applied Physiology, vol.
Comparison of peak cough flows measured by pneumotachograph
and a portable peak flow meter.
Between the ventilator and the proximal end of the ETT, we interposed in succession, a classic breathing circuit (Y-piece), a respiratory filter (heat-and-moisture exchanger), the same as the ones used in clinical settings, and a heated pneumotachograph
(Hans-Rudolph Inc., model 3700, 0 to 160 l/minute, Kansas City, Kansas, USA).
Reduction in airflow can be measured accurately by having the patient breathe through a tight-fitting mask with an attached pneumotachograph
, but is much more commonly assessed non quantitatively by measuring pressure just inside a nostril or carbon dioxide or temperature near the mouth and nose by means of thermistors.
Participants were connected to a metabolic cart (VMax 229, Sensormedics, Yorba Linda, Calif) which consisted of a pneumotachograph
, [O.sub.2] and C[O.sub.2] analysers, and a mixing chamber.
A drop in minute ventilation of 16% and 32% during non-REM and REM sleep respectively was observed by Becker and coworkers , predominantly due to a decrease in tidal volume as measured by a pneumotachograph
. Though, Ballard and coworkers  also showed a decrease in minute ventilation in COPD patients, it was due to an increase in upper airway resistance and a decrease in neuromuscular output to the respiratory muscles, and not due to a decrease in lung volumes.
Effect of a mask and pneumotachograph
on tracheal and nasopharyngeal pressures, respiratory frequency, and ventilation in horses.
Volume calibration was made with a pneumotachograph
CPX, Medical Graphics Corp., St.
Lung function indices, including the forced expiratory volume in 1 s (FEV1) and forced vital capacity (FVC), were measured with a pneumotachograph
. The diffusing capacity for carbon monoxide (DLCO) was measured by the single-breath method.
For others peak flow readings give additional help and the quality of this help will be improved by the introduction of the new EU standard.' The meters tested were mini Wright, Vitalograph, TruZone, MultiSpiro and Pneumotachograph
Measuring masks for leakage during tidal breathing by measuring ventilated volume with a pneumotachograph
, they found more effective seals with the AeroChamber and Hans Rudolph masks (ventilation of 4,24 L/min and 4.22 L/min, respectively).