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Restrictive lung diseases are a category of extrapulmonary, pleural, or parenchymal respiratory diseases that restrict lung expansion, [2] resulting in a decreased lung volume, an increased work of breathing, and inadequate ventilation and/or oxygenation. Pulmonary function test demonstrates a decrease in the forced vital capacity.
Bronchiolitis obliterans results in worsening shortness of breath, wheezing, and a dry cough.The symptoms can start gradually, or severe symptoms can occur suddenly. [9] [10] These symptoms represent an obstructive pattern that is non-reversible with bronchodilator therapy, and need to be related to various lung insults. [11]
Extrapulmonary restriction is a type of restrictive lung disease, indicated by decreased alveolar ventilation with accompanying hypercapnia.It is characterized as an inhibition to the drive to breathe, or an ineffective restoration of the drive to breathe.
It is the main cause of restrictive lung disease that is intrinsic to the lung parenchyma. In contrast, quadriplegia [16] and kyphosis [17] are examples of causes of restrictive lung disease that do not necessarily involve pulmonary fibrosis.
Restrictive lung diseases yielding from intrinsic factors occur within the lungs themselves, such as tissue death due to inflammation or toxins. Conversely, restrictive lung diseases caused by extrinsic factors result from conditions originating from outside the lungs such as neuromuscular dysfunction and irregular chest wall movements.
Asthma is a respiratory disease that can begin or worsen due to exposure at work and is characterized by episodic narrowing of respiratory airways. Occupational asthma has a variety of causes, including sensitization to a specific substance, causing an allergic response; or a reaction to an irritant that is inhaled in the workplace.
Lung function testing is used for the assessment and monitoring of functional impairment due to bronchiectasis. These tests may include spirometry and walking tests. [39] Obstructive lung impairment is the most common finding but restrictive lung impairment can be seen in advanced disease.
[1] [2] The three most common types are asbestosis, silicosis, and coal miner's lung. [3] Pneumoconiosis often causes restrictive impairment, [4] although diagnosable pneumoconiosis can occur without measurable impairment of lung function. [1] [2] Depending on extent and severity, it may cause death within months or years, or it may never ...
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