J Kesavanathan

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This study determined exposure-response relationships to side-stream tobacco smoke (2 hrs; 0, 1, 5, and 15 ppm CO) in 29 healthy nonsmoking young adults. Sixteen subjects had no history of environmental tobacco smoke rhinitis (ETS-NS) while 13 subjects had a history of ETS rhinitis (ETS-S). Eye irritation and odor perception showed a statistically(More)
Nasal mucociliary clearance (NMC) is a biomarker of nasal mucosal function. Tobacco smokers have been shown to have abnormal NMC, but the acute effect of environmental tobacco smoke (ETS) on nonsmokers is unknown. This study evaluated acute tobacco smoke-induced alterations in NMC in 12 healthy adults. Subjects were studied on 2 days, separated by at least(More)
Objective measures of upper respiratory function are needed to understand the effects of inhaled toxicants on the nasal passages. Acoustic rhinometry (AR) is a simple new technique that determines nasal volume by measuring the cross-sectional area of the upper airway as a function of the distance along the nasal passage. This study compares acoustic(More)
BACKGROUND Zafirlukast, a leukotriene antagonist, has been shown to have protective effects against a variety of asthma triggers. OBJECTIVE Our purpose was to evaluate zafirlukast's effects on upper and lower airway responses to cat allergen exposure with use of a well-characterized cat exposure model. METHODS In a double-blind, placebo-controlled,(More)
Partitioning of ventilation has been hypothesized to be related to nasal pressure-volume relationships, relationships that have been difficult to measure. Regional differences in nasal passage pressure-volume relationships are likely because the nasal valve and anterior turbinate are structurally different, but both are altered by agents that alter vascular(More)
BACKGROUND Acoustic rhinometry (AR) uses sonar principles to map the anatomy of the nasal cavity and has been used in other studies to assess acute airway responses to allergen exposure. OBJECTIVE The purpose of this study was to evaluate the utility of AR in assessing acute airway responses to cat allergen exposure by using a well-characterized cat(More)
Indoor environmental pollutants can act as irritants, allergens, carcinogens, or infectious agents. This chapter focuses on human susceptibility to indoor environmental pollutants, here defined as inherent factors that alter exposure-response relationships. The host defense system is an important determinant of human susceptibility and is composed of two(More)
Inhaled pollutants and respiratory disease deserve particular attention at a conference focused on susceptibility and environmental risk. Inhaled air contains diverse biological, physical and chemical stressors which may cause upper and lower respiratory inflammation and exacerbate complex polygenic disorders such as asthma and sinusitis. This paper focuses(More)
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