OBJECTIVE The study focused on assessment of the health status of workers during construction phase of highway rehabilitation projects at six selected sites of N5 around Lahore, including Kala Shah Kaku, Muridke, Kamuki, Bhaipheru, Pattoki, and Okara. METHODS The study was based on multi-methods approach involving hazard identification through survey and checklist as well as a questionnaire f...

The diurnal variation (DV) in peak expiratory flow rate (PEFR) has been studied among 132 grain elevator workers who accomplished three daily measurements of PEFR during three weeks. DV was calculated as the difference between the highest and the lowest PEFR as a percentage of the mean PEFR on each day. For the whole group the median was 5.9%. DV was higher among smokers and among workers with ...

BACKGROUND Variability of peak expiratory flow (PEF) has been proposed as a surrogate for bronchial hyperresponsiveness. The normal range of variability of PEF for children has been reported and the test has been used to screen for asthma in population based studies. However, there is little information on the reproducibility of the method in epidemiological settings. METHODS In a cohort stud...

Peak expiratory flow rate (PEFR) was measured in 300 healthy adult male and female staff and students of the University of Benin, Benin City, and the College of Education, Ekiadolor, near Benin. The variations of Peak Expiratory Flow Rate with respect to height (ht), weight (wt) and chest circumference (cc) were determined in these subjects. PEFR values fell within the middle to the lower limit...

   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...

OBJECTIVES In the treatment of stable mild to moderate asthma, twice-daily administration of inhaled steroids may allow adequate control of the asthma; however, comparisons of the efficacy of once- or twice-daily administration brought contradictory results. This study is a randomized, double-blind crossover trial, set to determine if inhaled beclomethasone dipropionate given once daily in the ...

peak flow readings begins and hence this measurement is of less diagnostic value. Technically it is quite easy to alter the whistle so that more accurate readings are obtained above 300 1./min., but when this is done the performance of the whistle is less discriminating for small variations at low flow rates. Overestimation of the peak expiratory flow rate by the whistle is negligible (2%). The...

A computer technique (cosinor analysis) has been used to evaluate circadian rhythms in airway calibre in normals and asthmatics. Two hundred and twenty-one normal subjects recorded peak expiratory flow rate (PEFR) at home four times a day for seven days. Rhythm detection was statistically significant in 145 of them (65.6%) who showed a mean amplitude of 8.3% of individual mean PEFR (+/- SD 5.2%...

INTRODUCTION In diagnosis and treatment of respiratory diseases, the assessment of lung functions is of considerable importance. So, normal reference values for pulmonary function tests of any population need to be assessed. OBJECTIVE An attempt has been made in the present study to measure the peak expiratory flow rate (PEFR) in healthy Nepalese children and young adults. MATERIAL AND METH...

This study was designed to assess the impact of high particulate concentration on peak expiratory flow rate of lungs of sand stone quarry workers. The workers were engaged in different types of activities such as drilling, loading and dressing. These different working conditions had different concentrations of RSPM, leading to different exposure levels in workers. It was found that exposure dur...