Bronchospasm is a sudden constriction of the muscles in the walls of the
bronchioles. It is caused by the release ( degranulation) of substances from mast cellsor basophils under the influence of anaphylatoxins. It causes difficulty in breathing which can be very mild to severe.
Bronchospasm appears as the feature of
asthma, chronic bronchitis, anaphylaxis, as a possible side-effect of the drug Pilocarpine(which is used to treat illness resulting from the ingestion of deadly nightshadeas well as other things) and also as a side effect for Beta Blockers (used to treat hypertension). The overactivity of the bronchioles' muscle is a result of exposure to a stimulus which under normal circumstances would cause little or no response. The resulting constriction and inflammation causes a narrowing of the airways and an increase in mucousproduction; this reduces the amount of oxygenthat is available to the individual causing breathlessness, coughing and hypoxia.
Bronchospasm is a serious potential complication of placing a breathing tube during general anesthesia. When the airways spasm or constrict in response to the irritating stimulus of the breathing tube, it is difficult to maintain the airway and the patient can become apneic.
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bronchospasm — [bräŋ′kō spaz΄əm] n. spasmodic contraction of the muscular walls of the bronchial air passages to the lungs, as in asthma, which makes breathing difficult bronchospastic [bräŋ΄kōspas′tik] adj … English World dictionary
bronchospasm — Contraction of smooth muscle in the walls of the bronchi and bronchioles, causing narrowing of the lumen. Cf.:bronchoconstriction. * * * bron·cho·spasm bräŋ kə .spaz əm n constriction of the air passages of the lung (as in asthma) by spasmodic… … Medical dictionary
bronchospasm — n. narrowing of bronchi by muscular contraction in response to some stimulus, as in asthma and bronchitis. The patient can usually inhale air into the lungs, but exhalation may require visible muscular effort and is accompanied by expiratory… … The new mediacal dictionary
bronchospasm — noun Date: circa 1901 constriction of the air passages of the lung (as in asthma) by spasmodic contraction of the bronchial muscles • bronchospastic adjective … New Collegiate Dictionary
bronchospasm — /brong keuh spaz euhm/, n. spasmodic contraction of the muscular lining of the bronchi, as in asthma, causing difficulty in breathing. [1900 05; BRONCHO + SPASM] * * * … Universalium
bronchospasm — noun difficulty in breathing due to a contraction of smooth muscle in the walls of the bronchi and bronchioles … Wiktionary
bronchospasm — n. spasmodic contraction of the bronchi (Medicine) … English contemporary dictionary
bronchospasm — noun Medicine spasm of bronchial smooth muscle, producing narrowing of the bronchi … English new terms dictionary
bronchospasm — bron·cho·spasm … English syllables
bronchospasm — bron•cho•spasm [[t]ˈbrɒŋ kəˌspæz əm[/t]] n. pat spasmodic contraction of the muscular lining of the bronchi, as in asthma, causing difficulty in breathing • Etymology: 1900–05 bron cho•spas′tic ˈspæs tɪk adj … From formal English to slang