Causes of Chronic Bronchitis

Written by Wang Xiang Yu

Pulmonology

Updated on September 25, 2024

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The causes of chronic bronchitis are not yet very clear. It is currently speculated that it may be the result of multiple factors interacting over a long period. The factors most closely associated with the occurrence of chronic bronchitis primarily include smoking, cigarette smoke, dust, and irritants such as sulfur dioxide, nitrogen dioxide, chlorine, ozone, etc. Additionally, some infectious factors may also be somewhat related to the occurrence of chronic bronchitis, with the most common possibly being infections by mycoplasma, bacteria, or viruses. Furthermore, chronic bronchitis may be related to age, climate, and other factors. Overall, the triggers of chronic bronchitis are not very clear at present, and it is advised to eliminate these risk factors as much as possible if present.

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Written by Wang Xiang Yu

Pulmonology

1min 3sec

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Chronic bronchitis auscultation characteristics

Most patients with chronic bronchitis, for the most part, show no abnormalities upon lung auscultation. This means their breath sounds are relatively clear, without diminished or enhanced breath sounds, nor any dry or wet rales typically heard. This is the case for the majority of patients; however, a small number of patients during acute exacerbations might present with some dry or wet rales at the back or the base of the lungs. Moreover, these rales may disappear after the patient coughs, indicating that in chronic bronchitis, the sounds heard upon auscultation can change and are not constantly present. You might hear dry or wet rales one moment, and after the patient coughs or receives treatment, these sounds could potentially alleviate. Additionally, if a patient with chronic bronchitis starts to wheeze or develops asthma, they might exhibit sounds such as wheezing or prolonged expiration.

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Written by Wang Xiang Yu

Pulmonology

1min 27sec

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COPD and chronic bronchitis differences

COPD stands for Chronic Obstructive Pulmonary Disease, also commonly referred to as chronic obstructive lung disease. It is a chronic inflammation of the respiratory tract caused by inhalation of tobacco smoke, other types of smoke, harmful gases, or particulate irritants. This inflammation persists, eventually leading to structural changes in the airways, and symptoms such as coughing up phlegm and difficulty breathing. Chronic bronchitis is diagnosed primarily based on symptoms. Also known as chronic obstructive bronchitis, it is defined by symptoms of coughing, phlegm, or wheezing lasting more than three months per year and persisting for over two years, while excluding other diseases. There is a close connection between chronic bronchitis and COPD. If a patient with chronic bronchitis experiences worsening of their condition characterized by restricted airflow, as identified through pulmonary function tests indicating airflow limitation, they can then be diagnosed with Chronic Obstructive Pulmonary Disease. However, if a patient only exhibits symptoms of chronic bronchitis and maintains normal lung function, they cannot be diagnosed with Chronic Obstructive Pulmonary Disease under such circumstances.

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Written by Wang Xiang Yu

Pulmonology

2min 27sec

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Is chronic bronchitis treatable?

Chronic bronchitis exists, but before treating it, we must first have a correct understanding of the disease. Chronic bronchitis is a long-term illness that can have a slow onset and may last for decades, with the possibility of acute exacerbations throughout one's life. Moreover, there is no cure for chronic bronchitis yet. Currently, the treatment for patients with chronic bronchitis mainly depends on the stage of the disease and its symptoms. Most of the time, patients are in the remission phase. The primary treatment during this phase involves addressing risk factors. For instance, patients who smoke must quit smoking, as most patients experience significant relief from cough and phlegm after quitting. Additionally, patients with a history of dust exposure or harmful gas exposure should avoid further contact as much as possible. Furthermore, when the condition is stable, patients may engage in physical exercise to improve their physical condition and prevent colds. A small number of patients may experience respiratory infections and repeated aggravations, in which case, consider using immunomodulators or traditional Chinese medicine as adjunctive therapies. Patients with chronic bronchitis may experience acute exacerbations of their condition, meaning an increase in cough and phlegm, or the appearance of purulent sputum that is difficult to expectorate. In these cases, the main treatment method is still anti-infection therapy. Commonly used anti-infection medications include quinolones, macrolides, and cephalosporins. Some patients may experience frequent and severe cough and phlegm, and have difficulty expectorating the mucus. In such cases, mucolytic and cough suppressant medications are required for symptomatic treatment, commonly using drugs such as ambroxol, bromhexine, and eucalyptus menthol. A few patients may also experience wheezing, known as asthmatic bronchitis, which may require the use of anti-asthmatic medications such as aminophylline and various nebulized medications. (Note: The use of specific medications should be under the guidance of a doctor.)

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Written by Wang Xiang Yu

Pulmonology

59sec

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Is chronic bronchitis contagious?

Chronic bronchitis refers to some chronic non-specific inflammation of the bronchial mucosa and surrounding tissues. Its main symptoms are coughing and expectoration, so many people are concerned about the contagion from patients with chronic bronchitis. However, chronic bronchitis itself is not a contagious disease and is not considered for acute infectious disease management. This means that most of the time, it is relatively safe to be in contact with patients suffering from chronic bronchitis. Nonetheless, there are some exceptions, such as certain cases where a chronic bronchitis patient might also be afflicted with mycoplasma infections or certain viral infections, such as H1N1 influenza, H3N2 influenza, or other infections like tuberculosis. In such cases, the chronic bronchitis patient may potentially be infectious.

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Written by Wang Xiang Yu

Pulmonology

45sec

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Is chronic bronchitis hereditary?

The etiology of chronic bronchitis is not very clear at present. It is considered that many factors work over a long period to cause chronic bronchitis. The most common factors include long-term irritation from harmful gases and particles, such as cigarette smoke, smog, dust, irritating gases like sulfur dioxide, nitrogen dioxide, etc., as well as infectious factors. There might also be a certain relationship with the occurrence of chronic bronchitis, but so far, no close relationship has been found between chronic bronchitis and genetics, and there is no evidence to prove that chronic bronchitis is a hereditary disease.