airway mucus hypersecretion health effects caused by air pollutants may range from subtle biochemical or physiological signs, such as mildly reduced lung function, to difficult breathing, wheezing, coughing and exacerbation of existing respiratory conditions such as asthma. the aim of this study was measuring the adverse health effects of air pollution on lung function of primary school student...

treatment of acute asthma is based on rapid reversal of bronchospasm and arresting airway inflammation. this study was done to determine the effect of intravenous mgso4 for improvement of pulmonary fuction in patients with acute asthma non-responding to routine therapy. this randomized, double –blind controlled study was conducted on 48 patients, magnesium sulfate group , n=48 aged 12-85 years,...

Peak expiratory flow rate is an effective measure of effort dependent airflow. It is relatively a simple procedure, and may be carried out in the field using portable instruments. The average PEFR of healthy young Indian males and females is around 500 and 350 lpm respectively. The PEFR reaches a peak at about 18-20 years, maintains this level up to about 30 years in males, and about 40 years i...

Peak expiratory flow rates (PEFRs) were measured in 424 healthy subjects (213 males and 211 females) from Karachi and Rawalpindi regions of Pakistan. The mean age, height and peak expiratory flow rate for males were 32.82 ± 10.52 yr, 163.5 ± 5.4 cm and 478.6 ± 63.2l/min respectively. The corresponding values for females were 35.54 ± 6.98 yr, 157.34 ± 8.2cm and 422.5 ± 42.6 l/min respectively. B...

Prediction equations for peak expiratory flow rate (PEFR) of Malay, Chinese and Indian children were obtained by analysing 1020 PEFR recordings of children free of respiratory symptoms and illnesses. Boys had significantly higher PEFR than girls. For both sexes the highest levels of PEFR were observed in Malays and the lowest in Indians. The differences between Malay and Chinese boys were not s...

The effects of sleep interruption and deprivation were studied in 21 patients with nocturnal asthma. Seven patients were awakened at 0200 on three consecutive night and exercised for 15 minutes. This produced no significant improvement in the overnight fall in peak expiratory flow rate (PEFR) compared with a control night of uninterrupted sleep. In a second study in five patients PEFR was measu...

Peak expiratory flow rate (PEFR), an important test to assess overall lung function, was determined in 84 male adolescent subjects, out of which there were 46 and 38 nonswimmers (NS). Their ages varied between 9 to 15 years. It was observed that a significant spurt in PEFR value occurs in S at the age of 12 years. A similar spurt in growth (height & weight) in S, not so apparent in NS, was also...

The purpose of this study was to examine whether the resistance of the peak flow meter influences its recordings. One hundred and twelve subjects, (healthy nonsmokers and smokers and subjects with lung diseases) performed three or more peak expiratory flow (PEF) manoeuvres through a Fleisch pneumotachograph with and without a mini-Wright peak flow meter added in random order as a resistance in ...

UNLABELLED INTRODUCTION In this study we aimed to evaluate the peak cough flow (PCF) in healthy Brazilian subjects. METHODS We evaluated 484 healthy subjects between 18 and 40 years old. Subjects were seated and oriented were asked to perform a maximal inspiration followed by a quick, short and explosive expiration on the peak flow meter. Three measures were carried out and recorded the av...