ASCP: Urinalysis and Body Fluids Polansky Cards| Questions Solved 100%
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Course
ASCP
Institution
ASCP
Chemical Urinalysis by Reagent Strip: Principle: Double indicator system - ANSWER pH
Chemical Urinalysis by Reagent Strip: Principle: Protein error of indicator - ANSWER Protein
Chemical Urinalysis by Reagent Strip: Principle: Glucose oxidase/ peroxidase - ANSWER Glucose
Chemical Urinalysis by R...
ASCP: Urinalysis and Body Fluids
Polansky Cards| Questions Solved 100%
Chemical Urinalysis by Reagent Strip: Principle: Double indicator system - ANSWER pH
Chemical Urinalysis by Reagent Strip: Principle: Protein error of indicator - ANSWER Protein
Chemical Urinalysis by Reagent Strip: Principle: Glucose oxidase/ peroxidase - ANSWER Glucose
Chemical Urinalysis by Reagent Strip: Principle: Sodium nitroprusside rxn - ANSWER Ketones
Chemical Urinalysis by Reagent Strip: Principle: Pseudoperoxidase activity of hgb - ANSWER
Blood
Chemical Urinalysis by Reagent Strip: Principle: Diazo reaction - ANSWER Bilirubin
Chemical Urinalysis by Reagent Strip: Principle: Ehrlich's aldehyde rxn or diazo rxn -
ANSWER Urobilinogen
Chemical Urinalysis by Reagent Strip: Principle: Greiss reaction - ANSWER Nitrite
Chemical Urinalysis by Reagent Strip: Principle: Leukocyte esterase rxn - ANSWER Leukocyte
esterase
Chemical Urinalysis by Reagent Strip: Principle: pKa change of polyelectrolyte - ANSWER
Specific gravity (SG)
improperly preserved specimen pH - ANSWER pH 9
,Most sensitive to acetoacetic acid.
Less sensitive to acetone. Doesn't
react with beta-hydroxybutyric acid. - ANSWER Ketones
Urine:
Uniform color = ------
Speckled = ----- - ANSWER Uniform color = hgb or myoglobin.
Speckled = RBCs.
Normal renal threshold of glucose = ------ mg/dL - ANSWER Normal renal threshold of glucose =
160-180 mg/dL.
POSSIBLE EFFECT: Urine Failure to mix specimen well - ANSWER False-neg leukocyte, blood
Comments: WBCs, RBCs settle out.
Specific Sources of Error with Reagent Strip Testing:
pH - ANSWER INCREASED OR FALSE POSITIVE:
Improperly preserved specimen
DECREASED OR FALSE NEGATIVE
acid runover from protein square
Specific Sources of Error with Reagent Strip Testing:
Protein - ANSWER INCREASED OR FALSE POSITIVE:
Highly buffered alkaline urine, prolonged dipping,
contaminated container, ↑SG
, DECREASED OR FALSE NEGATIVE:
Proteins other than albumin
Specific Sources of Error with Reagent Strip Testing:
Glucose - ANSWER INCREASED OR FALSE POSITIVE:
Contamination with peroxide or bleach
DECREASED OR FALSE NEGATIVE:
Unpreserved specimen, ↑ascorbic acid, ↑SG, ↓temp.
Specific Sources of Error with Reagent Strip Testing:
Ketones - ANSWER INCREASED OR FALSE POSITIVE:
Red pigments, dyes, some meds
DECREASED OR FALSE NEGATIVE:
Improper storage. Acetone is volatile.
Bacteria break down acetoacetic acid.
Specific Sources of Error with Reagent Strip Testing:
Blood - ANSWER INCREASED OR FALSE POSITIVE:
Menstruation, oxidizing agents, bacterial
peroxidase
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