Results 201 to 210 of about 3,323,022 (256)

Frequency dependence of total respiratory resistance in early airway disease.

American Review of Respiratory Disease, 2015
Patients who develop frequency dependence of lung compliance will theoretically have frequency dependence of pulmonary resistance. We investigated the ability of the simpler, noninvasive measurement of frequency dependence of total respiratory resistance
Kjeldgaard Jm, Richard W. Hyde, Speers Dm, Reichert Ww   +3 more
semanticscholar   +1 more source

Modelling resistance and reactance with heterogeneous airway narrowing in mild to severe asthma.

Canadian Journal of Physiology and Pharmacology, 2015
Ventilation heterogeneity is an important marker of small airway dysfunction in asthma. The frequency dependence of respiratory system resistance (Rrs) from oscillometry is used as a measure of this heterogeneity.
S. Bhatawadekar, D. Leary, G. Maksym
semanticscholar   +1 more source

Nasal surgery and airway resistance

The Laryngoscope, 1979
AbstractThis 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 ...
openaire   +3 more sources

The Upper Airway Resistance Syndrome

Chest, 1999
The upper airway resistance syndrome (UARS) is a recently described form of sleep-disordered breathing in which repetitive increases in resistance to airflow within the upper airway lead to brief arousals and daytime somnolence. This review will first describe the chronological progression of our understanding of UARS within the broader context of ...
Nancy A. Collop, Elliott N. Exar
openaire   +3 more sources

Nose-only water-pipe smoking effects on airway resistance, inflammation, and oxidative stress in mice.

Journal of applied physiology, 2013
Water-pipe smoking (WPS) is a common practice in the Middle East and is now gaining popularity in Europe and the United States. However, there is a limited number of studies on the respiratory effects of WPS.
A. Nemmar, H. Raza, P. Yuvaraju, S. Beegam, A. John, J. Yasin, R. Hameed, E. Adeghate, B. Ali   +8 more
semanticscholar   +1 more source

Upper Airway Resistance Syndrome

Respiration, 1997
Obstruction of the upper airway may cause arousals resulting in daytime sleepiness and cardiovascular disturbances. The upper airway resistance syndrome may easily be overlooked because conventional measurements of oronasal airflow and thoracic and abdominal efforts are not sensitive enough.
Karl-Heinz Rühle, WJ Randerath, E. Schlenker   +2 more
openaire   +3 more sources

Extrathoracic airway resistance in man

Journal of Applied Physiology, 1961
Simultaneous extrathoracic and intrathoracic flow resistance was measured in 19 unanesthetized subjects during mouth breathing. Lateral intratracheal pressure was recorded from a needle introduced 2 cm below the larynx. The intratracheal-oral pressure gradient was recorded during various respiratory maneuvers.
Robert E. Hyatt, Roger E. Wilcox
openaire   +3 more sources

Upper airway resistance syndrome

Sleep Medicine Reviews, 1999
This article reviews the clinical picture, diagnosis and management of the upper airway resistance syndrome (UARS). Presently, there is not enough data on key points like the frequency of UARS and the morbidity associated with this condition. Furthermore, the existence of LIARS as an independent sleep disorder and its relation with snoring and ...
J.M. Montserrat, Joan Ramon Badia
openaire   +2 more sources

Comparative Measurements of Airway Resistance

Respiration, 1975
Three different ways to calculate airway resistance with the whole body plethysmograph during spontaneous breathing and the MBC maneuver were tested on normal subjects and patients with obstructive airway disease. The 'effective resistance values' calculated by applying periodic electric current theory correlate well with a linear interpolation of the ...
Matthys H, Orth U
openaire   +3 more sources

Upper Airway Resistance Syndrome [PDF]

Oto-Rhino-Laryngologia Nova, 2000
The term ‘upper airway resistance syndrome’ denotes an entity characterized by the presence of daytime fatigue or sleepiness in the presence of a normal respiratory disturbance index and oxygen saturation. Despite some similarities, certain specific clinical and diagnostic features distinguish it from the obstructive sleep apnea syndrome.
Susmita Chowdhuri, Christian Guilleminault   +1 more
openaire   +1 more source