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Urinalysis: Chemical Examination of Urine
test 1
31
Health Care
Undergraduate 4
09/13/2009

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Cards

Term
Which test on the strip is based on a double sequential enzyme reaction?
Definition
glucose
Term
What all sugars are detected by the glucose test on the strip?
Definition
only glucose, no other sugars.
Term
What test would you use to detect sugars other than glucose?
Definition
the copper reduction test for reducing substances- Clinitest Tablet test.
Term
Which sugar can't be detected with either the strip glucose test or the Clinitest?
Definition
sucrose.
Term
What would cause a false positive for glucose on the strip?
Definition
bleach or peroxide
Term
What tests on the strip are affected by ascorbic acid?
Definition
glucose- false negative, bilirubin- false negative, nitrite- false negative
Term
How sensitive is the strip test for glucose?
Definition
75-125 mg/dL
Term
What kind of reaction is the bilirubin strip test?
Definition
diazo reaction.
Term
Which is more sensitive for glucose- the strip test, or the Clinitest?
Definition
strip test
Term
how sensitive is the strip test for bilirubin?
Definition
0.4 to 0.8 mg/dL conjugated bilirubin
Term
Would bilirubin be present in the urine in hemolytic anemia?
Definition
No, because unconjugated bilirubin is not water soluble so it's not excreted by the kidneys.
Term
What disease processes could cause bilirubinuria?
Definition
hepatitis, liver disease, biliary tract obstruction.
Term
What are the three ketone bodies?
Definition
acetoacetate, acetone, and beta hydroxybutyric acid
Term
What is the most predominant ketone body?
Definition
beta hydroxybutyric acid
Term
Where do ketones come from?
Definition
fat metabolism
Term
What ketone(s) are tested for with the Multistix method?
Definition
only acetoacetate.
Term
What ketone(s) are detected with the Acetest tablet test?
Definition
acetone and acetoacetate
Term
What does ketonuria indicate?
Definition
Use of stored fats for energy in the absence of available carbohydrates for whatever reason. (starvation, diabetes, vomiting, etc.)
Term
What is the correlation between the refractometer method and the multistix specific gravity?
Definition
they correlate within .005
Term
What should you do with the specific gravity result if your pH reading is greater than or equal to 6.5?
Definition
add .005
Term
What is the effect of diabetes mellitus on specific gravity?
Definition
specific gravity is increased
Term
What is the effect of diabetes insipidis on specific gravity?
Definition
decreased specific gravity
Term
what is hematuria?
Definition
the presence of blood in the urine
Term
What is hemoglobinuria?
Definition
the presence of hemoglobin in the urine
Term
What pH range is measurable on the Multistix?
Definition
5-8.5
Term
increased bilirubin and urobilinogen indicates what disease?
Definition
hepatitis or certain toxic chemicals
Term
increased bilirubin without an increase in urobilinigen indicates what?
Definition
biliary obstruction
Term
increase in urobilinogen without increase in bilirubin indicates what?
Definition
hemolytic jaundice or liver disfunction (cirrhosis?)
Term
what kind of bacteria would not be indicated by the nitrite test?
Definition
gram positive bacteria- they don't convert nitrate to nitrite.
Term
what kind of reaction is the nitrate strip test?
Definition
diazo reaction
Term
what kind of reaction is the leukocyte strip test?
Definition
diazo reaction
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