Reversible airways obstruction.

Reversible airways obstruction and interstitial pneumonitis due to acetic acid.

Industrial exposure to gases and fumes may produce a wide variety of respiratory damage including tracheobronchial inflammation and parenchymal damage.' Tracheobronchial inflammation is reported, particularly after exposure to chlorine, ammonia, and sulphur dioxide. Interstitial pneumonitis has been associated with the inhalation of oxides of nitrogen,2 cadmium,3 manganese,4 mercury,5 and resin...

Physico-chemical properties of sputum in reversible airways obstruction.

Chronic Airways Obstruction

A B S T R A C T The respiratory responses to hypercapnia alone and to hypercapnia and flow-resistive loading during inspiration were studied in normal individuals and in eucapnic and hypercapnic patients with chronic airways obstruction. Responses were assessed in terms of minute ventilation and occlusion pressure (mouth pressure during airway occlusion 100 ms after the onset of inspiration). V...

Small airways obstruction syndrome.

STUDY OBJECTIVES To clarify the significance of a functional lung pattern characterized by a decreased vital capacity (VC) and an increased residual volume (RV), but with a normal FEV1/VC ratio. SETTING A university teaching hospital. SUBJECTS Patients with bronchial asthma, pulmonary emphysema, and small airways disease, and older subjects. MEASUREMENTS Measurements of static and dynamic...

Assessment of upper airways obstruction.

An indication of obstruction to the upper airways (trachea and larynx) may be obtained by calculating the ratio of the forced expired volume in one second to the peak expiratory flow rate (FEV(1)/PEFR). This index was found to be usually less than 10 in normal subjects (mean 7.3), and in patients with asthma (mean 6.9), chronic bronchitis (mean 7.7), or interstitial lung disease (mean 6.3). A s...