1 Skloot GS, Schechter CB, Herbert R, et al. Longitudinal assessment of spirometry in the World Trade Center Medical Monitoring Program. Chest 2009; 135:492–498 2 Miller A. A simple spirometric clue to asthma: airways obstruction suggested by a negative or reduced forced expiratory reserve volume despite normal FEV1/FVC ratio. Mt Sinai J Med 1990; 57:85–92 3 Miller A, Palecki A. Restrictive imp...

[Purpose] We investigated how diaphragm respiration exercises can affect pulmonary function in long-term male smokers in their twenties. [Subjects and Methods] Twenty-eight healthy males between 20 and 29 years of age were randomly divided into an experimental and a control group (14 members each). The experiment was conducted during 30 min sessions, 3 times a week for 4 weeks. The experimental...

Salome CM, King GG, Berend N. Physiology of obesity and effects on lung function. J Appl Physiol 108: 206–211, 2010. First published October 29, 2009; doi:10.1152/japplphysiol.00694.2009.—In obese people, the presence of adipose tissue around the rib cage and abdomen and in the visceral cavity loads the chest wall and reduces functional residual capacity (FRC). The reduction in FRC and in expir...

BACKGROUND The functional residual capacity (FRC), the only lung volume to be routinely measured in infants, is an unreliable volume landmark. In addition to FRC, the residual volume (RV) was measured by nitrogen washout using rapid thoracoabdominal compression (RTC) in nine infants with cystic fibrosis aged 5-31 months. METHODS A commercial system for nitrogen washout to measure lung volumes...

The forces expiratory volume, total lung capacity, transfer factor (diffusing capacity), and their subdivisions have been measured in 113 healthy British women aged 27 to 74 years of whom 47 were current smokers and 66 were lifetime non-smokers. The results have been analysed in terms of age, stature, mass, body fat, and smoking. In addition to their relation to stature and to age, the inspirat...

The effect of obesity on pulmonary function was studied in 13 children, aged 8-15 years, with 147-300% ideal body weight (IBW). Measurements included lung volumes, airflow rates pre- and post-bronchodilator nebulization, diffusing capacity (DLCO), maximal voluntary ventilation (MVV), minute ventilation VE), and resting energy expenditure (REE). When compared with predicted normal values for sex...

BACKGROUND Morbidly obese subjects, who often complain about breathlessness when lying down, breathe at low lung volume with a reduced expiratory reserve volume (ERV). Therefore, during tidal breathing the expiratory flow reserve is decreased, promoting expiratory flow limitation (EFL), which is more likely to occur in the supine position, when the relaxation volume of the respiratory system, a...

Introduction. Obesity is a condition that causes damage to the respiratory function. However, studies have demonstrated that weight loss due to bariatric surgery has resulted in a huge improvement on some lung volumes, but controversy still persists regarding the behavior of the respiratory muscle strength and IRV (inspiratory reserve volume). Objective. To evaluate the effect of weight loss, a...

STUDY OBJECTIVE To determine pulmonary function test (PFT) profile and respiratory muscle strength (RMS) of a group of obese individuals who did not have evidence of obstructive airway disease or other underlying diseases affecting their respiratory system. DESIGN Prospective, open. SETTING PFT laboratory, VA Medical Center. PARTICIPANTS Sixty-three consecutive obese (body mass index grea...