Cromolyn sodium, a mast cell stabilizing agent, provides an immediate protective effect against the exercise-induced bronchoconstriction while being used before the exercise. However, cromolyn is ineffective in reversing asthmatic bronchospasm; it is used as a maintenance therapy and has a prophylactic role in chronic asthma.    The purpose of this study was to determine the extent of change...

It has long been known [1] that, when comparing subjects of the same age and height, African ancestry is associated with 12–20% smaller forced expiratory volume in 1 s (FEV1) and forced vital capacity (FVC) than European ancestry. Both smaller and larger differences have been reported in studies of other ethnic groups. This has led to numerous efforts to explain the underlying reason for these ...

APGAR: Activity Pulse Grimace Appearance Respiration; PImax: Maximal Inspiratory Pressure; PEmax: Maximal Expiratory Pressure; DLCO: Diffusion Capacity; β-HCG: Bbeta Human Chorionic Gonadotropin; BMI: Body Mass Index; FVC: Forced Vital Capacity; FEV1: Forced Expiratory Flow at One Second; FEF25-75: Forced Expiratory Flow 25-75; RV: Residual Volume; TLC: Total Lung Capacity; DLCO/VA: Diffusion C...

The data from a longitudinal population study in Tucson, Arizona, were used to describe the development and decline of maximal expiratory flow-volume (MEFV) measures with age. On the basis of their answers to self-administered questionnaires, in 9 of the first 10 surveys (1972-1988) and having performed at least one MEFV test, 930 nonsmoking healthy subjects were selected, providing 3,848 indiv...

OBJECTIVES Asian migrant workers in Korea have various ethnicities. The purpose of this study was to evaluate the difference in spirometric interpretation made using the set of third National Health and Nutrition Examination Survey (NHANES III) reference equations and the relevant ethnicity-specific reference sets. METHODS Spirometry was performed on 166 migrant and 498 Korean male workers be...

Forced vital capacity (FVC) and forced expiratory volume in one second (FEV1) were measured in 796 Libyan children (386 boys and 410 girls) with ages ranging from 6 to 19 years. Values in girls were significantly less than those in boys after allowance had been made for age and height. FVC and FEV1 correlated best with standing height but were also correlated with body weight. These results may...

OBJECTIVES To evaluate pulmonary function in the first and third trimesters of pregnancy and analyze the influence of parity and smoking on spirometry parameters. METHODS This longitudinal prospective study included a cohort of 120 pregnant women. The inclusion criteria were as follows: singleton pregnancy, gestational age less than 13.86 weeks, and no preexisting maternal diseases. The exclu...

OBJECTIVE To determine whether lung function alters asthma severity based on symptom history in asthmatic adolescents. DESIGN Data on asthma symptoms and lung function were collected from adolescents randomly selected from the general population. SETTING Five schools from the central Wellington, New Zealand, area during 2003 to 2005. PARTICIPANTS Two hundred twenty-four secondary school s...

OBJECTIVE To investigate the possible impact of long-term occupational exposure to hydrocarbons on respiratory health. METHODS Respiratory health was assessed by questionnaires, spirometry, and exhaled nitric oxide in 250 male workers from a company handling and distributing refined petroleum products (exposed) and 250 electricians (controls). Exposure to hydrocarbons was assessed by personal...

BACKGROUND Impedance measurements by the forced pseudo random noise oscillation technique can be used to study the mechanical characteristics of the respiratory system. The objective of this study was to analyse the changes in impedance to a cold air provocation test in patients with asthma, and to correlate these changes with those in the forced expiratory volume in one second (FEV1). METHOD...