Asthma is a chronic inflammatory disease of the airways. Caused by environmental and genetic factors, it is characterized by variable and recurring symptoms, reversible airflow obstruction and bronchospasm. Classification Asthma is clinically classified according to: 1. Frequency of symptoms2. Forced expiratory volume in 1 second (FEV1)3. Peak expiratory flow rate It can also be classified as: 1. Atopic (extrinsic)2. Non-atopic (intrinsic) Brittle asthma Brittle asthma is a term used to describe two rare phenotypes of asthma - Type 1, which is characterized by sustained, chronic variability of PEFR and Type 2 which is distinguished by sudden severe exacerbations. Asthma attack Also referred as acute asthma exacerbation, the symptoms are dyspnea, wheezing and tightening of the chest. The colour of skin and nails appear blue due to lack of oxygen. Status asthmaticus Status asthmaticus is considered a medical emergency as it is a life-threatening episode of airway obstruction and does not respond to standard treatments of bronchodilators and steroids. Characterised by smooth muscle hypertrophy and basement membrane thickening, this acute asthma exacerbation can cause complications like cardiac and/or respiratory arrest.
Amit Shah inaugurates `mini-PMO` in Varanasi
PM Narendra Modi addresses DRDO scientists
Sonia Gandhi targets PM Modi yet again
PM Narendra Modi`s Parliamentary office to be inaugurated in Varanasi today