week 1 quiz

Question 1

An unpreserved urine specimen was collected at 8am, and remained at room temperature until the afternoon line-up was done. You would expect to find:

Answer 1

b. increased bacteria and nitrite

Question 2

A yellow foam is observed after shaking a greenish-amber urine indicates that the:

Answer 2

c. urine may contain bilirubin

Question 3

Which of the following best aids in the differentiation of hemoglobiuria and hematuria?

Answer 3

d. microscopic examination

Question 4

Which of the following blood cells will not be detected by the leukocyte esterase pad because it lacks esterase?

Answer 4

b. lymphocytes

Question 5

Which of the following is a ketone body not detected by the reagent strip or tablet test?

Answer 5

d. b-hydroxybutyrate

Question 6

Which of the following conditions most likely accounts for a negative nitrite result on the reagent strip despite the presence of bacteria?

Answer 6

d. all correct

Question 7

Which of the following are characteristic urine findings from a patient with hemolytic jaundice?

Answer 7

c. negative test for bilirubin and an increased amount of urobilinogen

Question 8

Which of the following reagent strip tests can be affected by ascorbic acid, resulting in falsely low or false-negative results?

Answer 8

d. all correct

Question 9

When the laboratorian performs the microscopic examination of urine sediment, which of the following are enumerated using low-power magnification?

Answer 9

b. casts

Question 10

A urine sediment could have which of the following formed elements and still be considered “normal”?

Answer 10

a. 2 or fewer hyaline casts

Question 11

urinary casts are formed with a core matrix of

Answer 11

d. uromodulin

Question 12

When the laboratorian is using brightfield microscopy, a urinary cast that appears homogenous with well-defined edges, blunt ends, and cracks is most likely a

Answer 12

d. waxy cast

Question 13

What cell is most commonly associated with vaginal contamination?

Answer 13

c. squamous epithelial cells

Question 14

can this be ran?
-A urine cup containing 10 mL of cloudy urine that was collected 3 hours ago at an OSF Urgo and was left at room temperature.

Answer 14

no. specimens can only be left at room temp for 2 hours

Question 15

can this be ran?
-urine cup containing 30 mL of urine that was collected at OSf Urgo 20 hours ago and stored in the freezer

Answer 15

no. specimen cannot be frozen

Question 16

can this be ran?
syringe with 10 mL of bloody urine collected in ED 1 hour ago and left at room temp

Answer 16

okay to run

Question 17

A urine with a pH of 8.0, protein is 1+, glucose is negative, ketone is negative, blood is 1+, and the specific gravity is 1.002. Would you expect to find intact red blood cells in this urine specimen?

Answer 17

would not anticipate to find any RBCs. alkaline pH and low SG creates hypotonic condition that would lyse the RBCs

Question 18

A urine is ran on the Novus. The urine has a specific gravity of 1.040. Explain the clinical significance, if any, of this value.

Answer 18

X-ray contrast media or radiographic dye are present

Question 19

What test, in addition to urine glucose, was used to help diagnose galactosemia in children less than 2 years old?

Answer 19

perform a urine clinitest to determine whether or not reducing substances other than glucose are present in patient’s urine. if the clinitest is positive and glucose is negative, recommended that physician orders glactosemia blood test in chemistry