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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 ?
The health outcomes of interest were infant respiratory symptoms of wheeze and persistent cough measured as counts (i.
Clinical decision: The patient was pleased with the codeine although it caused mild nausea, and he plans to avoid spending money on over-the-counter medications for acute cough and to consult a physician about persistent cough.
Children who had never had their own bedrooms had a significantly higher adjusted prevalence rate of persistent cough, and those who had always slept in shared beds had higher adjusted prevalences of all the morbidity outcomes.
This partly stems from understanding of the key symptoms to look out for at the outset, such as a persistent cough that lasts three weeks or more.
The authors of the report said that, despite the fact many children with a persistent cough appear to have the condition, "general practitioners rarely diagnose and notify whooping cough in this age group".
Mr O'Sullivan was spotted after he went to his GP complaining of a persistent cough.
Pack everyone into a silicone-sealed office and a colleague's innocent behaviour - a persistent cough perhaps - can appear decent grounds for murder; 2.
COPD is a chronic disease marked by inflammation and progressive de-truction of lung tissue resulting in dyspnea (shortness of breath), persistent cough, recurrent infections and chronic debilitation.
The scheme, which centres around a persistent cough, aims to increase awareness of the disease and improve earlier diagnosis in Yorkshire.
Hazare was transferred to the Jindal Naturopathy Centre in Bangalore after undergoing treatment at the Medanta Hospital in Gurgaon, Haryana for persistent cough and backache.
SMOKERS and quitters are being urged to have a lung check for a disease that causes wheeziness and a persistent cough.

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