PARA LA 2 Flashcards
a test to measure for acidity of stool to help in the diagnosis of a certain medical condition
Test for pH- nitrazine paper test
Normal pH of feces
6.6
optimal result oof pH in Stool
6.1 to 7.9
low pH below 6.0 may be a result of _______________
diarrhea
a slightly alkaline pH is observed in patients with________________
low-fiber diet
what is the test for mucus
Hecht method
Interpretation of Hecht Method
Mucus stains _____
Light red
Interpretation of Hecht Method
Nuclei and cell membrane stains _____
Reddish violet
Interpretation of Hecht Method
Background should be _____
Green
test for occult blood
fecal occult blood test
Occult blood is not observed _________
macroscopically
Occult blood in an indication of ______________________
Gastrointestinal Bleeding
Use Guaiac reagent
Fecal Occult Blood Test
test for bile pigment
Gmelins test
Gmelin’s Test
After precipitation of the bile pigments by nitric acid, it is oxidized by acids to derivatives such as . There are (3)
Biliverdin (green)
Bilicyanin (blue)
Choletelin (yellow)
Interpretation of Gmelin’s Test
Play of colors: From outermost to innermost: there are (5) colors
green
blue
violet
red
yellow
Interpretation of Gmelin’s Test
The absence of green excludes the Prescence of _______________
Bile pigment
test to determine whether the blood is grossly bloody vomitus or feces of the neonate represents swallowed maternal blood during delivery or during breastfeeding
APT test or Apt-downey
May use Sudan Black to stain
Test for Malabsorption of Fats
Test for Malabsorption of Fats Interpretation
Presence of _>60 fat droplets/HPF indicates ____________
Steatorrhea
test for ability to digest gelatin
TRYPSIN
test for presence of reducing substances
CLINITEST
this test is helpful as a mass screening procedure for colorectal cancer
FOBT ( Fecal Occult Blood Test)
Color for positive in FOBT ( Fecal Occult Blood Test)
blue
Eating peroxidase containing food and intake of drugs like aspirin or other anti inflammatory drugs
Can cause false positive in FOBT ( Fecal Occult Blood Test)
Intake if large amounts of vitamin C and conversion to acid hematin
Can case false negative in FOBT ( Fecal Occult Blood Test)
normally around __ grams per day of fat is excreted in the feces -Test for Malabsorption of Fats
7g
Test for Malabsorption of Fats
excess fat excreted in the feces is called
steatorrhea
Test for Malabsorption of Fats
is caused by the deficiency of pancreatic lipase and bile salts
steatorrhea
In APT test, neonatal blood contains a high proportion of ________________ which is resistant to alkali denaturation
fetal hemoglobin
In Apt test in the presence of fetal hemoglobin the solution __________________
Remains Pink
In apt test in the presence of maternal hemoglobin the solution _____________________________
becomes yellow brown after 2 mins
Hecht reagent is prepared by mixing ______________ and _________________
2% brilliant green and 1% neutral red
to prevent false positive in Gmelin’s test, diet should be free from peroxidase-containing foods for at least ________ prior to testing
3 days
