Upper airway cooling reduces upper airway resistance in anaesthetized young guinea-pigs

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Upper airway cooling reduces upper airway resistance in anaesthetized young guinea-pigs.

In adults, the upper airway (UA) contains a variety of receptors including cold receptors, which evoke reflex effects on ventilation and UA dilator muscle activity, which may be important in the regulation of UA patency. However, very little is known about UA receptors in young animals, and the effects of UA cooling on UA dilator muscle activity and resistance have not been studied. A constant ...

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Effects of upper airway carbon dioxide on upper airway resistance and muscle activity in young guinea-pigs.

The upper airway (UA) of adult animals is known to contain carbon dioxide-sensitive receptors and UA CO2 reflexly affects breathing, UA dilator muscle activity and UA resistance. These effects may function in the control of UA patency. There is evidence that some UA reflexes are stronger in young than in adult animals, but it is not known whether CO2-sensitive receptors are present in the UA of...

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Upper airway muscle activity and upper airway resistance in young adults during sleep.

To determine the relationship between upper airway muscle activity and upper airway resistance in nonsnoring and snoring young adults, 17 subjects were studied during sleep. Genioglossus and alae nasi electromyogram activity were recorded. Inspiratory and expiratory supraglottic resistance (Rinsp and Rexp, respectively) were measured at peak flow, and the coefficients of resistance (Kinsp and K...

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Upper-airway resistance syndrome (UARS) was first recognized in children in 1982 (Guilleminault et al., 1982). The term UARS, however, was not used until adult cases were reported in 1993 (Guilleminault et al., 1993). The description of UARS brought the attention of clinicians to a group of patients that was left undiagnosed and untreated despite severe impairment. The authors indicated that th...

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The upper airway resistance syndrome.

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 sleep-disordered breathing. The primary symptom...

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ژورنال

عنوان ژورنال: European Respiratory Journal

سال: 1998

ISSN: 0000-0000,0903-1936

DOI: 10.1183/09031936.98.11061257