background fumes released form welding activities are capable of initiating several acute and chronic respiratory effects. objectives the aim of the present study was to evaluate respiratory symptoms and spirometry parameters in welders of a steel industry. methods this cross-sectional study was conducted in a steel industry and involved 60 welders and 40 non-welders. a questionnaire was used t...

The effects of an upper respiratory infection on some commonly measured spirometric indices have been determined in this study. The forcod vital capacity, forced expiratory volume in one second, forced expiratory flow in the middle half of the vital capacity and the peak expiratory flow were significantly lower during the infection. This stresses the need in cross sectional and longitudinal pul...

BACKGROUND We aimed to investigate the effects of spinal immobilization devices on pulmonary functions. METHODS This study was a cross-over trial in healthy volunteer subjects; 60 volunteers were included. We performed a full spirometry in the supine position, and forced vital capacity (FVC), forced expiratory volume in one second (FEV1) and FEV1/FVC were recorded in all subjects. Then, Phila...

Using data obtained during the first four complete surveys of a general population sample (2,435 spirometric studies on 916 different asymptomatic nonsmoking subjects), we have derived mathematically continuous equations designed to describe the stages of growth, maturation, and subsequent decline in the forced expiratory volume in one second (FEV1) and the forced vital capacity (FVC). With thi...