bronchoalveolar lavage

(redirected from Bronchoalveolar lavage fluid)
Also found in: Acronyms.


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cells) by use of a bronchoscope or other hollow tube through which saline is instilled into distal bronchi and then withdrawn.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.
1,3,13) Most authors do not recommend lung biopsy; bronchoalveolar lavage fluid analysis, while not a prerequisite, may be helpful in the diagnosis.
tsutsugamushi was isolated from the bronchoalveolar lavage sample after 40 days of culture (Figure); 500 [micro]L of bronchoalveolar lavage fluid was used for culture.
The authors report that short-term (1 week) inhalation of nano-NH induced significant oxidative stress and inflammation in the pulmonary and extrapulmonary organs, mitochondrial DNA damage in the aorta, significant signs of inflammation in bronchoalveolar lavage fluid, and changes in lung histopathology and induction of acute-phase response.
Furthermore, the recruitment of leukocytes and chemical mediators in bronchoalveolar lavage fluid (BALF) counted as well as histopathological changes of lung tissue fixed with 10% neutral buffered formalin (NBF) and stained with hematoxylin and eosin (H&E) stain.
Leucocytes were analyzed in bronchoalveolar lavage fluid (BALF), blood and pulmonary parenchyma at 24 h after the last ovalbumin challenge.
MedImmune plans to initiate a third Phase 2a study to evaluate the ability of MEDI-528 to inhibit the biological activity of IL-9 in the bronchoalveolar lavage fluid of adult patients with atopic asthma.
Two dimensional protein patterns of bronchoalveolar lavage fluid from non-smokers, smokers, and subjects exposed to asbestos.
His bronchoalveolar lavage fluid demonstrated a mixed inflammatory cell population.
05, n=6/group) chlorine gas-induced lung inflammation as measured by bronchoalveolar lavage fluid cellularity levels by 40% that appeared to be due to limiting neutrophil influx.
Legionella colonies isolated from bronchoalveolar lavage fluid grew on buffered-charcoal yeast extract agar.