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bronchial washing |
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bronchial washing Etymology: Gk, bronchos, windpipe; ME, wasshen, to wash irrigation of the bronchi and bronchioles performed during bronchoscopy to cleanse the tubes and to collect specimens for laboratory examination. bronchial washing A procedure in which isotonic saline is instilled through a bronchoscope and fluid containing cells, microorganisms, or other material from the upper airways–trachea, bronchi, bronchioles is aspirated into a trap; the
material is then centrifuged to concentrate the cells, stained, and examined by microscopy, or cultured if infection is suspected. Cf Bronchial brushings. |
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The new diagnostic criteria contain more specific radiological criteria, whereas bacteriological criteria have become more lenient: a single NTM culture from bronchial washing fluid, in a well-defined class of patients, or two positive sputum cultures now suffice to establish the diagnosis. For example, a diagnosis of "atypical" made on a bronchial washing specimen and a diagnosis of "nonsmall cell carcinoma" made on a bronchial biopsy specimen are considered discrepant; a diagnosis of "atypical" on a liver aspiration specimen and a diagnosis of "cirrhosis" on a liver biopsy specimen are not discrepant. Smears for acid-fast bacilli (AFB) were positive on two bronchial washing samples. |
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