The frequency and damping properties of the mouth pressure oscillations were described already 50 years ago; however, these oscillations did not occur in patients with elevated airway resistance
nor in normal subjects with added external resistances .
Nasal airway resistance
was measured via the anterior-nozzle method with a rhinomanometer (model MPR-2100; Nihon Kohden; Tokyo) using [DELTA]P 100 Pascal resistance values.
At IAR and LAR, tidal volume, tidal airflow, respiratory rate and specific airway resistance
(sRaw) were measured by volumetric differential pressure transducer (PT5, Grass Co.
A cause of daytime sleepiness: the upper airway resistance
The flow-interruption method for measuring airway resistance
has been extensively tested for its reliability and was a non-invasive test for providing valuable data about respiratory functions.
Since upper airway resistance
syndrome may require state-of-the-art technology for its detection, sleep-disordered breathing often remains undetected and hence ignored.
Other sleep disorders to consider in the differential diagnosis are obstructive sleep apnea (OSA), upper airway resistance
syndrome, idiopathic central nervous system (CNS) hypersomnolence, and periodic limb movements during sleep (Fig.
Results: The investigators found that the vitamin supplements protected the study group from the decreases in forced expiratory flow, the amount of air dispelled from the lungs during a certain time period and peak expiratory volume, a measure of airway resistance
, that were seen among those who received placebo pills.
With funding in place from the Levy Board, Roberts and his team will investigate the role of airway resistance
in the development of EIPH.
The pulmonary function tests consisted of specific airway resistance
(SRaw) measurements with a constant body plethysmograph (model Master Lab; Jaeger), using the method of Dubois et al.
After sleep experts gave an intensive course in sleep disorders to the clinic's doctors, diagnosis of sleep disorders increased markedly -- about 80 percent of which were either sleep apnea or upper airway resistance
This technique generates measures of airway resistance
Previous studies have shown that ASM-024 reduces airway resistance
in mice and has smooth muscle relaxant properties in vitro by acting directly on airway smooth muscle cells by a mechanism independent of cGMP or cAMP pathways; however, ASM-024's action on potassium channels and Na+/K+ ATPase is unknown.
We compare the effect of tracheostomy versus endotracheal tube on dead space, airway resistance
and other lung parameters in critically ill ventilated patients.
The researchers then measured their airway resistance
using a number of tests, including a spirometry test.