lower respiratory tract

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Related to lower respiratory tract: Lower respiratory tract infection

lower respiratory tract

one of the two divisions of the respiratory system. The lower respiratory tract includes the left and right bronchi and the alveoli where the exchange of oxygen and carbon dioxide occurs during the respiratory cycle. The bronchi divide into smaller bronchioles in the lungs, the bronchioles into alveolar ducts, the ducts into alveolar sacs, and the sacs into alveoli. The alveolar sacs and the alveoli present a total lung surface of about 850 square feet (79 square meters) for the exchange of oxygen and carbon dioxide, which occurs between the most internal alveolar surface and the tiny capillaries surrounding the external alveolar wall. The lower respiratory tract is a continuation of the upper respiratory tract and is a common site of infections, obstructive conditions, and neoplastic disease. Compare upper respiratory tract. See also lung.


closer to ground surface.

lower airway
the trachea from the entrance to the thorax, bronchi and bronchioles.
lower burner syndrome
acupuncture term meaning chronic accumulation of fluid in the lungs because of failure of the kidneys to excrete the fluid.
lower motor neuron (LMN)
the final common nervous path; the ventral horn cell in the spinal cord and the peripheral motor neuron. A lesion of a sufficient number of these neurons causes atrophy of the muscles supplied by the nerve, weak reflexes and flaccid paralysis.
lower nephron nephrosis
see renal cortical necrosis.
lower respiratory tract
the trachea, bronchial tree, lungs, pulmonary vessels and pleura.
lower urinary tract
includes, ureters, bladder and urethra.
References in periodicals archive ?
Trends in bacterial pathogens of lower respiratory tract infections in children.
1% of hospitalizations from lower respiratory tract infections could potentially be prevented if Inuit Canadian infants were breastfed.
The CRP test is not widely used as a diagnostic aid in the United States, but the results of this study suggest that use of the test may help physicians and patients feel more comfortable about delaying antibiotics for lower respiratory tract infections, Dr.
Methods: Seventy five children aged 6 months to 12 yr with signs of community-acquired lower respiratory tract infections were selected for the study.
Preterm infants, those with chronic lung disease, and infants with complicated cardiac disease are especially vulnerable to the infection and have an increased risk of progressing to a serious lower respiratory tract infection that sometimes requires hospitalization, mechanical ventilation and intensive care.
Centers for Disease Control and Prevention study that found that secondhand smoke hits children hard -- causes lower respiratory tract illness such as bronchitis and pneumonia, exacerbates asthma and increases the risk of middle-ear infections.
The Global Health Council, an international group of health care professionals and organizations based in Washington, DC, states that of all infectious diseases worldwide, those in the lower respiratory tract are the leading cause of death.
Exposure to secondhand smoke is associated with respiratory illnesses including lung cancer, childhood asthma, and lower respiratory tract infections.
Raniclor is indicated for the treatment of bacterial infections, including otitis media, lower respiratory tract infections, pharyngitis: March 2004).
Aspergillus species reach the sinuses and lower respiratory tract via inhaled conidia.
While amoxicillin, trimethoprim/sulfamethoxazole (TMP/SMX) (Septra/Bactrim), erythromycin and doxycycline are still flrstline drugs for upper and lower respiratory tract infections, it is important to save Ceftin, Vantin, Spectracef, Avelox, Levaquin and Tequin for cases involving resistant pneumococcus, Moraxella catarrhalis and Haemophilus influenzae.
1,2) From 1988 to 1996, infant hospitalization rates for bronchiolitis increased significantly, while hospitalization rates for lower respiratory tract diseases excluding bronchiolitis did not vary significantly.

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