ASCP Urinalysis/Body Fluids UPDATED
Exam Questions and CORRECT Answers
After reviewing a 24 hour urine for quantitative total protein analysis, the technician must first -
CORRECT ANSWER - measure the total volume
False results in urobilinogen testing may occur if the urine specimen is - CORRECT
ANSWER - exposed to light
A clean catch urine is submitted to the laboratory for routine urinalysis and culture. The routine
urinalysis is done first, and 3 hours later, the specimen is sent to the microbiology department for
culture. The specimen should: - CORRECT ANSWER - be rejected due to time delay
with time delay, bacteria is multiplying which is not giving an accurate reading for when culture
is done
Which of the following urine results is most apt to be changed by prolonged exposure to light -
CORRECT ANSWER - bilirubin
Urine samples should be examined within 1 hour of voiding because - CORRECT
ANSWER - bacterial contamination will cause alkalinization of the urine
The following results were obtained on a urine specimen at 8 AM
pH 5.5
protein 2+
glucose 3+
ketones 3+
blood negative
bilirubin positive
,nitrite positive
If this urine specimen was stored uncapped at 5C without preservation and retested at 2PM,
which of the following test results would be changed due to these storage conditions -
CORRECT ANSWER - ketones
being uncapped can cause the ketones to evaporate
A urine specimen comes to the laboratory 7 hours after it is obtained. It is acceptable for culture
only if the specimen has been stored: - CORRECT ANSWER - at 4-7C
Which of the following would be affected by allowing a urine specimen to remain at room
temperature for 3 hours before analysis - CORRECT ANSWER - pH
A 24 hour urine from a man who had no evidece of kidney impairment was sent to the laboratory
for hormone determination. The volume was 600 mL but there was some question as to the
completeness of the 24 hour collection. The next step would be to: - CORRECT
ANSWER - check the creatinine level; if it is >1g, do the procedure
Failure to observe RBC casts in urine specimen can be caused by - CORRECT
ANSWER - centrifuging an unmixed specimen
eGFR calculated by the MDRD formula takes into account the age, BUN, race, albumin, and
what else for its calculations? - CORRECT ANSWER - creatinine
The creatinine clearance is reported in - CORRECT ANSWER - mL/min
Microalbumin can be measured by a random urine collection. An increased microalbumin is
predictive of - CORRECT ANSWER - nephropathy
,A patient with uncontrolled diabetes mellitus will most likely have - CORRECT
ANSWER - pale urine and high specific gravity
While performing an analysis of a baby's urine, the technologist notices the specimen to have a
"mousy" odor. Of the following substances that may be excreted in urine, the one that MOST
characteristically produces this odor is: - CORRECT ANSWER - phenylpyruvic acid
An ammonia-like odor is characteristically associated with urine from patients who - CORRECT
ANSWER - have an infection with proteus spp.
Urine that develops a port wine color after standing may contain - CORRECT ANSWER -
porphyrins
Acid urine that contains hemoglobin will darken on standing due to the formation of -
CORRECT ANSWER - methemoglobin
Urine from a 50 year old man was noted to turn dark red on standing. This change is caused by -
CORRECT ANSWER - porphyrins
The clarity of a urine sample should be determined - CORRECT ANSWER - following
thorough mixing of the specimen
Milky urine from a 24 year old woman would most likely contain - CORRECT
ANSWER - many white blood cells
A brown-black urine would most likely contain - CORRECT ANSWER - melanin
The yellow colorof urine is primarily due to - CORRECT ANSWER - urochrome pigment
Red urine may be due to - CORRECT 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 a multiple reagent strip analysis. The most
likely cause of the turbidity is - CORRECT ANSWER - phosphates
In which of the following metabolic diseases will urine turn dark brown to black upon standing -
CORRECT ANSWER - alkaptonuria
Urine osmolality is related to - CORRECT ANSWER - specific gravity
Urine specific gravity is an index of the ability of the kidney to - CORRECT ANSWER -
concentrate the urine
Osmolality is a measure of - CORRECT 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 - CORRECT
ANSWER - osmolality
To prepare a solution appropriate for quality control of the refractometer, a technician should use
- CORRECT ANSWER - sodium chloride with a specific gravity of 1.022
A urine's specific gravity is directly proportional to its - CORRECT ANSWER - dissolved
solids
Isosthenuria is associated with a specific gravity which is usually - CORRECT
ANSWER - fixed around 1.010
The fluid leaving the glomerulus normally has a specific gravity of - CORRECT
ANSWER - 1.010
Exam Questions and CORRECT Answers
After reviewing a 24 hour urine for quantitative total protein analysis, the technician must first -
CORRECT ANSWER - measure the total volume
False results in urobilinogen testing may occur if the urine specimen is - CORRECT
ANSWER - exposed to light
A clean catch urine is submitted to the laboratory for routine urinalysis and culture. The routine
urinalysis is done first, and 3 hours later, the specimen is sent to the microbiology department for
culture. The specimen should: - CORRECT ANSWER - be rejected due to time delay
with time delay, bacteria is multiplying which is not giving an accurate reading for when culture
is done
Which of the following urine results is most apt to be changed by prolonged exposure to light -
CORRECT ANSWER - bilirubin
Urine samples should be examined within 1 hour of voiding because - CORRECT
ANSWER - bacterial contamination will cause alkalinization of the urine
The following results were obtained on a urine specimen at 8 AM
pH 5.5
protein 2+
glucose 3+
ketones 3+
blood negative
bilirubin positive
,nitrite positive
If this urine specimen was stored uncapped at 5C without preservation and retested at 2PM,
which of the following test results would be changed due to these storage conditions -
CORRECT ANSWER - ketones
being uncapped can cause the ketones to evaporate
A urine specimen comes to the laboratory 7 hours after it is obtained. It is acceptable for culture
only if the specimen has been stored: - CORRECT ANSWER - at 4-7C
Which of the following would be affected by allowing a urine specimen to remain at room
temperature for 3 hours before analysis - CORRECT ANSWER - pH
A 24 hour urine from a man who had no evidece of kidney impairment was sent to the laboratory
for hormone determination. The volume was 600 mL but there was some question as to the
completeness of the 24 hour collection. The next step would be to: - CORRECT
ANSWER - check the creatinine level; if it is >1g, do the procedure
Failure to observe RBC casts in urine specimen can be caused by - CORRECT
ANSWER - centrifuging an unmixed specimen
eGFR calculated by the MDRD formula takes into account the age, BUN, race, albumin, and
what else for its calculations? - CORRECT ANSWER - creatinine
The creatinine clearance is reported in - CORRECT ANSWER - mL/min
Microalbumin can be measured by a random urine collection. An increased microalbumin is
predictive of - CORRECT ANSWER - nephropathy
,A patient with uncontrolled diabetes mellitus will most likely have - CORRECT
ANSWER - pale urine and high specific gravity
While performing an analysis of a baby's urine, the technologist notices the specimen to have a
"mousy" odor. Of the following substances that may be excreted in urine, the one that MOST
characteristically produces this odor is: - CORRECT ANSWER - phenylpyruvic acid
An ammonia-like odor is characteristically associated with urine from patients who - CORRECT
ANSWER - have an infection with proteus spp.
Urine that develops a port wine color after standing may contain - CORRECT ANSWER -
porphyrins
Acid urine that contains hemoglobin will darken on standing due to the formation of -
CORRECT ANSWER - methemoglobin
Urine from a 50 year old man was noted to turn dark red on standing. This change is caused by -
CORRECT ANSWER - porphyrins
The clarity of a urine sample should be determined - CORRECT ANSWER - following
thorough mixing of the specimen
Milky urine from a 24 year old woman would most likely contain - CORRECT
ANSWER - many white blood cells
A brown-black urine would most likely contain - CORRECT ANSWER - melanin
The yellow colorof urine is primarily due to - CORRECT ANSWER - urochrome pigment
Red urine may be due to - CORRECT 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 a multiple reagent strip analysis. The most
likely cause of the turbidity is - CORRECT ANSWER - phosphates
In which of the following metabolic diseases will urine turn dark brown to black upon standing -
CORRECT ANSWER - alkaptonuria
Urine osmolality is related to - CORRECT ANSWER - specific gravity
Urine specific gravity is an index of the ability of the kidney to - CORRECT ANSWER -
concentrate the urine
Osmolality is a measure of - CORRECT 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 - CORRECT
ANSWER - osmolality
To prepare a solution appropriate for quality control of the refractometer, a technician should use
- CORRECT ANSWER - sodium chloride with a specific gravity of 1.022
A urine's specific gravity is directly proportional to its - CORRECT ANSWER - dissolved
solids
Isosthenuria is associated with a specific gravity which is usually - CORRECT
ANSWER - fixed around 1.010
The fluid leaving the glomerulus normally has a specific gravity of - CORRECT
ANSWER - 1.010
