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Related to Chronic Cough: chronic bronchitis


sudden, forceful expiration of air from the lungs caused by an involuntary contraction of the muscles controlling the process of breathing. The cough is a response to some irritating condition such as inflammation or the presence of mucus (sputum) in the respiratory tract, as in infectious disease, or to heavy dust or industrial or tobacco smoke. Coughing may also be a reflex action to factors outside the respiratory tract; diseases that are not respiratory in nature (e.g., congestive heart failure or mitral valve disease) often bring on coughing. If there is mucus or a foreign substance in the respiratory tract, the cough should not be hindered since by this action the offending matter is expelled from the body. If, however, the cough becomes exhausting, sedation is indicated.



a reflex act usually occurring as a result of the irritation of the mucous membrane in the respiratory tract during an inflammatory process caused by pathological products (for example, sputum) or foreign bodies. A cough is one of the principal indications of disease in the respiratory organs (larynx, trachea, bronchi, and lungs). The cough center in the brain can sometimes be stimulated without irritation of the respiratory tracts. This is the so-called nervous cough that occurs in cases of fear and embarrassment. A distinction is made between a dry cough (without the formation and secretion of sputum) and a wet cough (with sputum).

The cough stimulus begins by deep inhalation, followed by a tensing of the bronchial and all the respiratory muscles resulting in forced expulsion. In so doing, the rima glottidis is closed, and intrathoracic pressure rises sharply. With the opening of the rima glottidis, the air bursts forth from the respiratory tract, carrying with it the sputum that has accumulated in the bronchi and pulmonary alveoli, dust particles, and so forth. Thus, a cough can be beneficial in helping to cleanse the respiratory tract. However, a protracted and severe cough that occurs with infections of the pleura, liver, and some other organs is harmful to the organism, since a systematic elevation of the intrathoracic and intrabronchial pressure leads to the gradual formation of pulmonary emphysema and impedes the flow of blood through the veins to the heart. This can lead to cardiopulmonary insufficiency.

Treatment is directed at the affliction that has caused thecough. With a wet cough, particularly if it is difficult to bring upthe sputum, expectorants are used; with a dry, persistent cough, cough suppressants are administered.


A sudden, violent expulsion of air after deep inspiration and closure of the glottis.
References in periodicals archive ?
Chronic cough can disrupt sleeping pattern and cause nausea, vomiting, and urinary incontinence.
2 times higher chances of chronic cough and/or phlegm than HIV-positive people without emphysema (Figure 2).
However, with lower EBC pH, lower FEV1%, and a higher prevalence of chronic cough in the shorter distance category, we believe that participants in category 1 might have a higher risk of developing airway diseases and this needs further investigation.
A review of the Chronic cough products under development by companies and universities/research institutes based on information derived from company and industry-specific sources
Chronic cough which is one of the frequent reasons for medical referal is defined as resistant cough lasting for longer than three weeks (1).
This case study outlines a rare presentation of chronic cough resulting from osteochondroma growing over the scapula.
Chronic cough resulting from drug use, such as angiotensin-converting enzyme (ACE) inhibitor, and remediable conditions such as infections, and obstructive sleep apnoea (OSA), usually resolves once treated.
Alexandre Carvalho is announcing the new Chronic Cough Clinic at his medical practice in Sunnyvale, Texas.
Australian studies have shown that more than 80% of parents of children with chronic cough have sought more than five medical consultations prior to referral.
However, chronic cough, defined as a persistent cough that lasts at least three weeks, is anything but normal.
I had a chronic cough that steadily worsened to the point that I was unable to sleep without medicine.
It includes information on the exam, a checklist of interpersonal and communication skills, and eight cases that demonstrate how to approach the exam, on chronic cough, diabetic follow-up, blood in the stool, shoulder pain, chest pain, depression, headache, and tremor.

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