BOC Urinalysis / Body Fluids UPDATED ACTUAL Questions and CORRECT Answers
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Course
Urinalysis and Body Fluids
Institution
Urinalysis And Body Fluids
BOC Urinalysis / Body Fluids UPDATED
ACTUAL Questions and CORRECT
Answers
d (Measure the total volume of the sample before removing an aliquot. To calculate the total
protein, measure the protein of an aliquot to learn the mg/dL. Then multiply that answer by the
number of dL in the 24-hour c...
BOC Urinalysis / Body Fluids UPDATED
ACTUAL Questions and CORRECT
Answers
d (Measure the total volume of the sample before removing an aliquot. To calculate the total
protein, measure the protein of an aliquot to learn the mg/dL. Then multiply that answer by the
number of dL in the 24-hour collection.) - CORRECT ANSWER- 1) After receiving a 24 hr.
urine for quantitative total protein analysis the technician must first:
a. subculture the urine for bacteria
b. add the appropriate preservative
c. screen for albumin using a dipstick
d. measure the total volume
a (Urobilinogen is degraded by light.) - CORRECT ANSWER- 2) False results in the
urobilinogen testing may occur if the urine specimen is:
a. exposed to light
b. adjusted to a neutral pH
c. cooled to room temp
d. collected in a nonsterile container
b (It is common practice to share samples between the microbiology department and urinalysis.
Ideally, the culture is set up first to prevent contamination. If that is not feasible time wise, the
sample should be aliquotted using aseptic technique, and refrigerated until it can be cultured.) -
CORRECT ANSWER- 3) A clean catch urine is submitted to laboratory for routine
urinalysis and culture. The routine urinalysis is done first, and 3 hrs. later, the specimen is sent to
the microbiology department for culture. The specimen should:
a. be centrifuged, and the supernatant culture
b. be rejected due to the time delay
c. not be cultured if no bacteria are seen
d. be processed for culture only if the nitrate is positive
,d (Bilirubin is degraded by light. The other analytes will not be affected.) - CORRECT
ANSWER- 4) Which of the following urine results is most apt to be changed by prolonged
exposure to light?
a. pH
b. protein
c. ketones
d. bilirubin
c (Evaluate each statement. a is incorrect because these cells don't agglutinate. b is partially
correct, but urobilinogen decreases in light. c is true, bacterial overgrowth does lead to an
alkaline urine. d is false, ketones are produced by fat metabolism in the patient.) - CORRECT
ANSWER- 5) Urine samples should be examined within 1 hr. of voiding because:
a. RBC's, leukocytes and casts agglutinate on standing for several hrs. at room temp
b. urobilinogen increases and bilirubin decreases after prolonged exposure to light
c. bacterial contamination will cause alkalinization of the urine
d. ketones will increase due to bacterial and cellular metabolism
Ketones - CORRECT ANSWER- 6) If a urine specimen was stored uncapped at 5 degrees C
without preservation and retested at 2pm which of the following test results would be changed
due to these storage conditions?
A. glucose
B. ketones
C. protein
D. nitrite
b (Storage must inhibit bacterial growth but not kill the bacteria. Freezing and additives are not
acceptable. The most commonly used method of preservation is refrigeration.) - CORRECT
ANSWER- 7) A urine specimen comes to the laboratory 7 hrs. after it is obtained. It is
acceptable for culture only if the specimen has been stored:
a. at room temp
b. at 4 - 7 C
,c. frozen
d. with a preservative additive
c (Consider whether a substance can increase or decrease outside the body. No more blood can
be produced. Although the RBC may rupture, they will still make a positive result on a
biochemical strip. The amount of solutes won't change, so specific gravity won't change. pH is
affected by metabolism of the urine components by bacteria, and room temperature is warm
enough for this to occur. Protein will not increase or decrease.) - CORRECT ANSWER- 8)
Which of the following would be affected by allowing a urine specimen to remain at room temp
for 3 hrs. before analysis:
a. occult blood
b. specific gravity
c. pH
d. protein
Daily void is approximately 1,500mL, but can range from 600-2,000mL
Creatinine is excreted at approximately 1.2 mg/24 hour
D Check the creatinine level; if it is >1g, do the procedure - CORRECT ANSWER- 9) A 24-
hour urine from a man who had no evidence of kidney impairment was sent to the lab for
hormone determination. The volume was 600mL, but there was some question as tot he
completeness of the 24-hour collection. The next step would be to:
A. Perform the hormone determination, since 600 mL is a normal 24-hour urine volume
B. check the chreatinine level; if it is <1g, do the procedure
C. report the hormone determination in mg/dL in case the specimen was incomplete
D. Check the creatinine level; if it is >1g, do the procedure
b (Larger sediment constituents sink to the bottom of the specimen container. Without prior
mixing, the sediment in the container may not be poured into the centrifuge tube.) - CORRECT
ANSWER- 10) Failure to observe RBC casts in a urine specimen can be caused by:
a. staining the specimen
, b. centrifuging an unmixed specimen
c. mixing the sediment after decantation
d. examining the sediment first under low power
C. creatinine - CORRECT ANSWER- 11) eGFR calculated by the MDRD formula takes
into account the age, BUN, race, albumin and what else for its calculations?
A. Urea
B. Ammonia
C. Creatinine
D. Cystatin C
c (The creatinine clearance is a filtration rate, and is reported in minutes. The sample is a 24-hour
urine, which is entered into the calculation as the volume in milliliters, and the factor of 1,440
minutes per 24 hours is applied.) - CORRECT ANSWER- 12) The creatinine clearance is
reported in:
a. mg/dL
b. mg/24hrs
c. mL/min
d. mL/24hrs
b (Patients with hypertension and diabetes mellitus are at risk for kidney disease. Detection of
small amounts of albumin in the urine predict eventual kidney disease. The advantage of this
sensitive detection is that patients with microalbuminuria can be treated with anti-hypertensive
medications and followed up more intensely to delay nephropathy.) - CORRECT ANSWER-
13) Microalbumin can be measured by a random urine collection. An increased microalbumin is
predictive of:
a. diabetes mellitus
b. nephropathy
c. hypertension
d. nephrotic syndrome
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