Guaiac test | definition of guaiac test by Medical dictionary
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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.
an obsolete test using glacial acetic acid, gum guaiac solution or hydrogen peroxide to detect traces of fecal or occult blood.
a test, using guaiac as a reagent, formerly performed on feces and urine for detecting occult blood in the intestinal and urinary tracts.
guai·ac test (gwī'ak test)
A screening procedure for occult blood in stool.
Almén, August Teodor, Swedish physiologist, 1833-1903.
a tree resin from Guajaaem officinale; used in a test for occult blood in the feces.
References in periodicals archive
At least one of the six guaiac test
samples (Fecatwin-S) was positive in 72.
The Advisory Group noted that "immunochemical tests have advantages over guaiac tests
," and recommended that the ACS fecal occult blood testing guideline be revised to include the following language, "in comparison with guaiac-based tests for the detection of occult blood, immunochemical tests are more patient friendly and are likely to be equal or better in sensitivity and specificity.
Contract notice: Read guaiac tests
for occult blood in the stool and the transmission of results to the university hospital of tours.
The framework agreement for the supply of test kits for colorectal cancer based on guaiac tests
for the occult blood in the stool, a self sample taken at home by the patient.
Immunoassays, unlike guaiac tests
, are not influenced by diet or medication use, and they are associated with fewer false-negative and false-positive findings, Dr.