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Related to Persistent cough: bronchitis, whooping cough, Chronic Cough


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 ?
Eating a bar of dark chocolate a day which has high levels of the compound may also be effective for people with diagnosed persistent cough, although eating chocolate on a daily basis may have other unwanted effects, including weight gain and so on," Morice said.
This will include taking hygienic precautions when around children and patients, and attending their GP if they have a persistent cough.
If you have new or worsening symptoms, such as a persistent cough, it is really important to get checked out by your GP.
A persistent cough or chronic cough that last weeks to months can actually have very little to do with colds or infections such as bronchitis.
Lung cancer expert Dr Emrys Evans said: "The most common symptom of lung cancer is a persistent cough.
A persistent cough and sore throat eventually caused him to visit the hospital.
Theobromine Based Drug Close to Commercialisation, Has Potential to Address the Serious Need for a Safer, Opioid Free Treatment for Persistent Cough
Patrick was forced to cancel public appearances to promote his new TV show 'The Beast' when he fell ill, and has revealed he knew something was seriously wrong with him when he developed a persistent cough.
He had recovered without complication from that procedure, with the exception of the persistent cough and some intermittent swallowing difficulty.
These include symptoms of sinus problems, nose irritation and postnasal irritation; shortness of breath; wheezing; throat irritation and persistent cough.
Use of a proton pump inhibitor to treat persistent cough associated with gastroesophageal reflux disease has some effect in some adults, but the effect is less universal than suggested in consensus guidelines on chronic cough, according to a metaanalysis of five randomized controlled trials.

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