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Airway inflammation is increased during the exacerbation resulting in increased hyperinflation, reduced expiratory air flow and decreased gas exchange. [1] [2] Exacerbations can be classified as mild, moderate, and severe. [3] As COPD progresses, exacerbations tend to become more frequent, the average being about three episodes per year. [4]
Aspirin-exacerbated respiratory disease (AERD), also called NSAID-exacerbated respiratory disease (N-ERD) or historically aspirin-induced asthma and Samter's Triad, is a long-term disease defined by three simultaneous symptoms: asthma, chronic rhinosinusitis with nasal polyps, and intolerance of aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs).
However, in asthma, the airflow limitation usually completely resolves after exacerbations, whereas in COPD it may not. [1] ACO presents with a chronic airflow limitation or obstruction (due to inflammation), with characteristics of both asthma and COPD. Inflammation of the large and medium airways (classically seen with asthma) is seen in ACO. [1]
Acute severe asthma, also known as status asthmaticus, is an acute exacerbation of asthma that does not respond to standard treatments of bronchodilators (inhalers) and corticosteroids. [2] Asthma is caused by multiple genes , some having protective effect, with each gene having its own tendency to be influenced by the environment although a ...
Obstructive lung disease is a category of respiratory disease characterized by airway obstruction.Many obstructive diseases of the lung result from narrowing (obstruction) of the smaller bronchi and larger bronchioles, often because of excessive contraction of the smooth muscle itself.
Onset of action for SAMAs is typically between 30 and 60 minutes, making these drugs less efficacious in treating acute asthma attacks and bronchospasm. [9] Most common side effects for these drugs may include dry mouth, headache, urinary tract infection, and bronchitis.
Its use may result in undertreatment, as treatments for asthma, chronic bronchitis, emphysema, or pneumonia may not be prescribed under a label of reactive airway disease. [1] Alternatively, overtreatment may occur, as patients can be prescribed inhaled beta-agonists or inhaled corticosteroids , which are medications used for asthma.
Additionally, bronchitis is described as either acute or chronic depending on its presentation and is also further described by the causative agent. Acute bronchitis can be defined as acute bacterial or viral infection of the larger airways in healthy patients with no history of recurrent disease. [8]