bronchoalveolar lavage

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Related to bronchoalveolar lavage: Induced Sputum


1. irrigation or washing out of an organ or cavity, as of the stomach or intestine.
2. to wash out, or irrigate.
bronchoalveolar lavage a technique by which cells and fluid from bronchioles and lung alveoli are removed for diagnosis of disease or evaluation of treatment; a bronchoscope is wedged into a bronchus and sterile saline is pumped in and then removed along with the fluid and cells to be analyzed.

bronchoalveolar lavage (BAL),

procedure for collecting the cellular milieu of the alveoli (for example, microorganisms, types of inflammatory cells) by use of a bronchoscope or other hollow tube through which saline is instilled into distal bronchi and then withdrawn.

bronchoalveolar lavage (BAL)

a diagnostic procedure in which small amounts of physiological solution are injected through a fiberoptic bronchoscope into a specific area of the lung, while the rest of the lung is sequestered by an inflated balloon. The fluid is then aspirated and inspected for pathogens, malignant cells, and mineral bodies.

bronchoalveolar lavage

A “wash” of the upper respiratory tract mucosa to obtain cells for evaluating inflammation, infection or cancer.

Utility of BAL 
• Cytologic analysis;
• Analysis of CD4:CD8 ratio; and rarely also
• To obtain cells for gene rearrangement to diagnose lymphoma.

bronchoalveolar lavage

Cytology A 'wash' of the upper respiratory tract to obtain cells for evaluating inflammation or cancer of lungs; BAL material is used for
1. Cytologic analysis.
2. Analysis of CD4:CD8 ratio and, rarely.
3. To obtain cells for gene rearrangement, ie Southern blot hybridization, to diagnose lymphoma.

bron·cho·al·ve·o·lar la·vage

(BAL) (brong'kō-al-vē'ŏ-lăr lă-vahzh')
A procedureperformed using fiberoptic bronchoscopy, during which a distal airway is occluded and liquid is then introduced into the airway and recovered for examination of cell types and microorganisms.

Bronchoalveolar lavage

A way of obtaining a sample of fluid from the airways by inserting a flexible tube through the windpipe. Used to diagnose the type of lung disease.


1. irrigation or washing out of an organ or cavity, as of the stomach or intestine.
2. to wash out, or irrigate. See also wash.

abdominal lavage
the infusion of saline into the peritoneal cavity, usually through a catheter inserted through the abdominal wall, for diagnostic purposes. The fluid returned may be examined for red blood cells, bacteria, enzymes, etc. Called also peritoneal lavage.
bronchoalveolar lavage
percutaneous entry of a catheter between tracheal rings, followed by infusion of a small volume of normal sterile saline which is then aspirated. The sample is submitted to microbiological and histopathological examination.
colonic lavage
irrigation of the colon, usually to remove ingested toxins.
gastric lavage
gastric lavage, or irrigation of the stomach, is usually done to remove ingested poisons. The solutions used for gastric lavage are physiological saline, 1% sodium bicarbonate, plain water or a specific antidote for the poison. A gastric tube is passed and then the irrigating fluid is funneled into the tube. It is allowed to flow into the stomach by gravity. The solution is removed by siphonage; when the funnel is lowered, the fluid flows out, bringing with it the contents of the stomach. Called also gavage.
ice water lavage
administration of ice water through a stomach tube is used in the treatment of acute upper gastrointestinal hemorrhage. There is a risk of inducing hypothermia.
ruminal lavage
used in the treatment of carbohydrate engorgement. Serial gavages are performed until the fluid comes back clear. A 2.5 in (6 cm) diameter Kingman tube is necessary if any bulk of material is to be retrieved and a hose from a tap is the only practical irrigating mechanism.
subpalpebral lavage
a method of medicating the eye, particularly useful in treating corneal ulcerations in horses. Tubing is inserted from the conjunctival sac through the upper eyelid and extended onto the head or neck. Medication can then be delivered continuously in a drip.
thoracic lavage
irrigation of a pleural sac via a paracentesis cannula.
References in periodicals archive ?
Bronchoalveolar lavage fluids were placed on cross-linked carboxymethylated transferrin (CCm-Tf) films, which were prepared by coating with cross-linked CCm-Tf solution on polyethylene terephthalate support films as described previously.
Value of assessing cryptococcal antigen in bronchoalveolar lavage and sputum specimens from patients with AIDS.
00 Currency: Usd Broken Down into Lots as Follows: Lot 1: Laboratory Equipment Pathology and Bronchoalveolar Lavage - 641,250.
A range of molecules involved in epithelial damage and repair, inflammation, myofibroblast accumulation and matrix deposition, angiogenesis, coagulation, and oxidative stress have been investigated for their potential in fulfilling this role, as biomarkers in tissue, bronchoalveolar lavage fluid, and serum, with a broadening of understanding of the events underlying the scarring of the lung (Table 1).
Therefore, Th2 activation, allergic tissue reactions, inflammatory cell recruitment in the bronchoalveolar lavage (BAL), and airway hyperresponsiveness to methacholine were studied in the OVA antigen-induced experimental model in mice, and then compared with negative and positive controls.
Nasopharyngeal aspirates and swabs are the preferred testing samples for most patients; however, lower respiratory samples obtained by bronchoalveolar lavage or tracheal aspirate may be useful in immunocompromised and mechanically ventilated patients.
Leucocytes were analyzed in bronchoalveolar lavage fluid (BALF), blood and pulmonary parenchyma at 24 h after the last ovalbumin challenge.
Morphometric identification and counting of the leukocytes was performed on the bronchoalveolar lavage samples following cyto-centrifugation and staining.
A range of samples, such as nasopharyngeal aspirates or swabs and bronchoalveolar lavage specimens, are appropriate for PCR processing.
Bacteriological diagnosis is possible by sputum, gastric aspirate, urine and bronchoalveolar lavage (BAL) cultures (3).
To date, 2-dimensional polyacrylamide gel electrophoresis (2-D PAGE) and liquid chromatography platforms have been used to study clinical samples including bronchoalveolar lavage (BAL), nasal lavage, and whole lung tissue (3-6).
For example, if the patient has pulmonary symptoms, bronchoalveolar lavage should be performed.