guaiac


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guaiac

 [gwi´ak]
a resin from certain Caribbean trees, used as a reagent.
guaiac test one for occult blood; glacial acetic acid and guaiac are mixed with the specimen; on addition of hydrogen peroxide, the presence of blood is indicated by a blue tint.

guai·ac

(gwī'ak),
The resin of Guaiacum officinale or G. sanctum (family Zygophyllaceae); a nauseant, diaphoretic, stimulant, and reagent used in testing for occult blood.
Synonym(s): guaiac gum
[Sp. guayaco, imitating the native Carib name]

guaiac

/guai·ac/ (gwi´ak) a resin from the wood of trees of the genus Guajacum, used as a reagent and formerly in treatment of rheumatism.

guaiac

[gwī′ak]
a wood resin, formerly used as a reagent in laboratory tests for the presence of occult blood.

lignum vitae

Herbal medicine
A Caribbean tree that is rich in saponins, resin, guaiaretic and guaiacolic acids; it is anti-inflammatory, laxative and stimulatory, and has been used to treat arthritis and gout; its products have been commercialised in mainstream medicine in the guaiac test for occult bleeding of the large intestine, which is often a sign of colorectal cancer.

guai·ac

(gwī'ak)
Nauseant, diaphoretic, stimulant, and reagent used in testing for occult blood. Also called guaiac gum.

guai·ac

(gwī'ak)
The resin of Guaiacum officinale or G. sanctum; a nauseant, diaphoretic, stimulant, and reagent used in testing for occult blood.
References in periodicals archive ?
Instead they contained camphor, chloroform, ammonia, red pepper, guaiac, myrrh, turpentine, or oil of sassafras as active ingredients.
Several research groups have reported occult bleeding in marathon runners, using pre-and post-race stool guaiac testing with the prevalence of blood in post-race specimens ranging from 8 to 30%(7).
A useful illustration of these principles is provided in the case of the "sixth stool guaiac.
La citada resina, llamada guaiac, es la misma que se utiliza en los analisis de diagnostico precoz del cancer de colon, que permite detectar la presencia de trazas invisibles de sangre.
If the guaiac test (Fecatwin-S) was positive, the immunological test (FECA-EIA) was performed.
The guaiac (pronounced "gwy-ack") stool test is sometimes called a "fecal" or "stool" occult test or "hemoccult" test.
The current guaiac Faecal Occult Blood Test (gFOBT) requires patients to send in three, separate samples over a two week period.
Comparison between a guaiac and three immunochemical faecal occult blood tests in screening for colorectal cancer.
The agency is proposing to cover Cologuard once every 3 years for Medicare beneficiaries who are aged 50-85 years, asymptomatic (no signs or symptoms of colorectal disease including but not limited to lower gastrointestinal pain, blood in stool, positive guaiac fecal occult blood test or fecal immunochemical test), and at average risk to develop colorectal cancer.
Contract award: playing guaiac tests for occult blood in the stool and the transmission of results to the university hospital of tours.
Most primary-care physicians still offer FOBT (although sometimes an older, less-sensitive guaiac FOBT) to their patients at least some of the time, although most report thinking that FOBT is only somewhat effective in reducing CRC mortality (9).