upper respiratory tract

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Related to upper respiratory tract: lower respiratory tract

upper respiratory tract (URT)

one of the two divisions of the respiratory system. The URT consists of the nose, nasal cavity, ethmoidal air cells, frontal sinuses, sphenoidal sinuses, maxillary sinus, larynx, and trachea. The URT conducts air to and from the lungs and filters, moistens, and warms the air during each inspiration. Infection and irritation of the URT are common and often spread to the lower respiratory tract, where they may cause serious complications. Compare lower respiratory tract. See also larynx, nose, trachea.
References in periodicals archive ?
In bovines, turbinate bones are developed extensively which occludes lumen of nasal cavity necessitating the small diameter endoscope required for upper respiratory tract endoscopy (Fig.
Conclusively, this patient was presented to draw attention to the fact that Ebstein-Barr virus may be manifested with rare but fatal complications including acute upper respiratory tract obstruction in children below the age of 2 years.
Researchers recruited 61 children with asthma (aged 1-14 yrs) who presented to a paediatric allergy and asthma unit with upper respiratory tract viral infections.
As the pandemic evolves, perhaps we may see more cases with florid infection in the lower respiratory tract and not so much virus in the upper respiratory tract," said Dr.
Risk-benefit ratios for upper respiratory tract infections
In order to gain further experience regarding the tolerability of Pinimenthol[R] ointment (1) in adolescents ([greater than or equal to] 12 years) and adults suffering from upper respiratory tract infections, a post-marketing observational study was performed.
Particles of [greater than or equal to] 6-[micro]m diameter are trapped increasingly in the upper respiratory tract (12); no substantial deposition in the lower respiratory tract occurs at [greater than or equal to] 20 [micro]m (11,12).
Sibley, who conducted an 8-year study showing that up to one-third of MS attacks follow a viral upper respiratory tract infection--such as a common cold.
In 2002, the same team found that such pollution increased the risk for asthma and upper respiratory tract infections in young children.
Both Haemophilus influenzae and Streptococcus pneumoniae can establish residence in the upper respiratory tract either separately or together.
That being said, I find it worthy of note that our most frequent non-hospital consultation that invites our counsel is on the methods of bearing with, or enduring, the simple Upper Respiratory Tract Infection or URTI.
10K and up), 50 to 70% of runners may experience symptoms of upper respiratory tract infection (URTI).

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