ASCP urinalysis and body fluids Exam
A patient with uncontrolled diabetes mellitus will most likely have: -Answer pale urine with a high specific gravity
While performing an analysis of a baby's urine, the laboratorian notices the specimen has a "mousy" odor. What substance that is excreted produces this odor -Answer Phenylpuruvic acid
An ammonia-like odor is characteristically associated with urine from patients who: -
Answer have an infection with Proteus spp.
Urine that develops a port wine color after standing may contain: -Answer porphyrins
Acid urine that contains hemoglobin will darken on standing due to the formation of -
Answer methemoglobin
Irvine from a 50-year-old man was noted to turn dark red on standing. This change is cause by the presence of -Answer Porphyrins
The clarity of a urine sample should be determined -Answer following thorough mixing of the specimen
Milky urine from a 24 year old woman would most likely contain -Answer many white blood cells
A brown-black urine would most likely contain: -Answer melanin
The yellow color of urine is primarily due to -Answer urochrome pigment
Red urine may be due to: -Answer myoglobin
A urine specimen collected on an apparently healthy 25-year-old man shortly after he finished eating lunch was cloudy but showed normal results on multiple reagent test strip analysis. The most likely cause of this turbidity is -Answer Phosphates
In what metabolic disease will urine turn dark brown to black upon standing -Answer Alkaptonuria
Urine osmolality is related to: -Answer specific gravity
Urine Specific Gravity is an index of the ability of the kidney to -Answer concentrate urine
Osmolality is a measure of -Answer dissolved particles, including ions A patient urine sample has an increased protein and a high specific gravity. Which of the following would be a more accurate measure of urine concentration -Answer osmolality
To prepare a solution appropriate for quality control of the refractometer the laboratory should use -Answer Sodium chloride with a specific gravity 1.022
A urine's specific gravity is directly proportional to its: -Answer dissolved solids
Isosthenuria is associated with a specific gravity which is usually -Answer fixed around 1.010
the fluid leaving the glomerulus has a specific gravity of -Answer 1.010 (pH of 7.4)
A deficiency in arginine vasopressin (antidiuretic hormone) is associated with -Answer Low urine specific gravity
When using a refractometer to measure urine concentration, the laboratory must correct
for what in their calculations -Answer Glucose
Calibration of refractometers is performed by measuring the specific gravity of distilled water and -Answer Sodium chloride
The method of choice for performing a specific gravity measurement of urine following administration of x-ray contrast dye is -Answer Reagent test strip
What urinary parameter is measured during the course of concentration and dilution tests to assess renal tubular function -Answer Osmolality and specific gravity
Refractive index is a comparison of -Answer light velocity in air to light velocity in solutions
A patient has 2 separate urinalysis reports, which contain the following data
specific gravity A 1.004; B 1.017
pH A 5.5; B 7.0
protein A negative; B 1+
glucose A negative; B negative
blood A negative; B small
microscopy A rare epis; B 1-2 granular casts, 2-3 hyaline casts, moderate epis
Which of the following statements best explains these results -Answer a (protein, glucose and microscopy of A are false negatives because of the specific gravity)
After receiving a 24-hour urine for quantitative total protein analysis, the laboratory must
first -Answer Measure the total volume A falsely low result for urobilinogen May occur if the urine specimen is -Answer Exposed to light
What urine result is most likely to be affected by prolonged exposure to light -Answer Bilirubin
The following test results were obtained on a urine specimen at 8:00am Test Result ph 5.5
Protein 2+
Glucose 3+
Ketones 3+
Blood Negative Bilirubin Positive Nitrite Positive If this urine specimen was stored uncapped at 5°C with out preservation and retested at
2:00pm, which of the following test results would be changed due to these storage conditions -Answer Ketones
What would be affected by allowing a urine specimen to remain at room temperature for
3 hours before analysis -Answer pH
The creatinine clearance is reported in -Answer ml/min
What can give a false negative urine protein reading -Answer Very dilute urine
eGFR calculated by the MDRD-IDMS traceable study equation takes into account the patients age, race, gender, and serum concentration of which -Answer Creatinine
A 24-hour urine from a man who had no evidence of kidney impairment was sent to the laboratory for hormone determination. The volume was 600mL, but there was some question as to the completeness of the 24-hour collection. The next step would be -
Answer Check the creatinine level; if it is >1 g, do the procedure
The ph of a urine specimen measures the -Answer free hydrogen ions
Upon standing at room temperature, a urine pH typically -Answer increases
Urine reagent test strips should be stored in -Answer Cool dry area
Principle of the reagent test strip for urine protein depends on -Answer Protein error of indicators
A patient with uncontrolled diabetes mellitus will most likely have: -Answer pale urine with a high specific gravity
While performing an analysis of a baby's urine, the laboratorian notices the specimen has a "mousy" odor. What substance that is excreted produces this odor -Answer Phenylpuruvic acid
An ammonia-like odor is characteristically associated with urine from patients who: -
Answer have an infection with Proteus spp.
Urine that develops a port wine color after standing may contain: -Answer porphyrins
Acid urine that contains hemoglobin will darken on standing due to the formation of -
Answer methemoglobin
Irvine from a 50-year-old man was noted to turn dark red on standing. This change is cause by the presence of -Answer Porphyrins
The clarity of a urine sample should be determined -Answer following thorough mixing of the specimen
Milky urine from a 24 year old woman would most likely contain -Answer many white blood cells
A brown-black urine would most likely contain: -Answer melanin
The yellow color of urine is primarily due to -Answer urochrome pigment
Red urine may be due to: -Answer myoglobin
A urine specimen collected on an apparently healthy 25-year-old man shortly after he finished eating lunch was cloudy but showed normal results on multiple reagent test strip analysis. The most likely cause of this turbidity is -Answer Phosphates
In what metabolic disease will urine turn dark brown to black upon standing -Answer Alkaptonuria
Urine osmolality is related to: -Answer specific gravity
Urine Specific Gravity is an index of the ability of the kidney to -Answer concentrate urine
Osmolality is a measure of -Answer dissolved particles, including ions A patient urine sample has an increased protein and a high specific gravity. Which of the following would be a more accurate measure of urine concentration -Answer osmolality
To prepare a solution appropriate for quality control of the refractometer the laboratory should use -Answer Sodium chloride with a specific gravity 1.022
A urine's specific gravity is directly proportional to its: -Answer dissolved solids
Isosthenuria is associated with a specific gravity which is usually -Answer fixed around 1.010
the fluid leaving the glomerulus has a specific gravity of -Answer 1.010 (pH of 7.4)
A deficiency in arginine vasopressin (antidiuretic hormone) is associated with -Answer Low urine specific gravity
When using a refractometer to measure urine concentration, the laboratory must correct
for what in their calculations -Answer Glucose
Calibration of refractometers is performed by measuring the specific gravity of distilled water and -Answer Sodium chloride
The method of choice for performing a specific gravity measurement of urine following administration of x-ray contrast dye is -Answer Reagent test strip
What urinary parameter is measured during the course of concentration and dilution tests to assess renal tubular function -Answer Osmolality and specific gravity
Refractive index is a comparison of -Answer light velocity in air to light velocity in solutions
A patient has 2 separate urinalysis reports, which contain the following data
specific gravity A 1.004; B 1.017
pH A 5.5; B 7.0
protein A negative; B 1+
glucose A negative; B negative
blood A negative; B small
microscopy A rare epis; B 1-2 granular casts, 2-3 hyaline casts, moderate epis
Which of the following statements best explains these results -Answer a (protein, glucose and microscopy of A are false negatives because of the specific gravity)
After receiving a 24-hour urine for quantitative total protein analysis, the laboratory must
first -Answer Measure the total volume A falsely low result for urobilinogen May occur if the urine specimen is -Answer Exposed to light
What urine result is most likely to be affected by prolonged exposure to light -Answer Bilirubin
The following test results were obtained on a urine specimen at 8:00am Test Result ph 5.5
Protein 2+
Glucose 3+
Ketones 3+
Blood Negative Bilirubin Positive Nitrite Positive If this urine specimen was stored uncapped at 5°C with out preservation and retested at
2:00pm, which of the following test results would be changed due to these storage conditions -Answer Ketones
What would be affected by allowing a urine specimen to remain at room temperature for
3 hours before analysis -Answer pH
The creatinine clearance is reported in -Answer ml/min
What can give a false negative urine protein reading -Answer Very dilute urine
eGFR calculated by the MDRD-IDMS traceable study equation takes into account the patients age, race, gender, and serum concentration of which -Answer Creatinine
A 24-hour urine from a man who had no evidence of kidney impairment was sent to the laboratory for hormone determination. The volume was 600mL, but there was some question as to the completeness of the 24-hour collection. The next step would be -
Answer Check the creatinine level; if it is >1 g, do the procedure
The ph of a urine specimen measures the -Answer free hydrogen ions
Upon standing at room temperature, a urine pH typically -Answer increases
Urine reagent test strips should be stored in -Answer Cool dry area
Principle of the reagent test strip for urine protein depends on -Answer Protein error of indicators
