Chapter 2 Study Questions Flashcards
Which of the following is the urine specimen of choice for cytology studies?
(a) First morning specimen
(b) Random specimen
(c) Midstream “clean catch” collection
(d) Timed collection
(b) Random specimen
Which of the following specimens usually eliminates contamination of the urine with entities from the external genitalia and the distal urethra?
(a) First morning specimen
(b) Midstream “clean catch” specimen
(c) Random specimen
(d) 4-hour timed collection
(b) Midstream “clean catch” specimen
Substances that show diurnal variation in their urinary excretion pattern are best evaluated using
(a) first morning specimen
(b) midstream “clean catch”
(c) random specimen
(d) timed collection
(d) timed collection
Which of the following will not cause erroneous results in a 24-hour timed urine collection?
(a) The collection starts and ends in the evening
(b) Two first morning specimens are included in the collection
(c) Multiple collection containers are not mixed together before specimen testing
(d) A portion of the collection is removed before total volume measurement
(a) The collection starts and ends in the evening
A 25-year-old woman complains of painful urination and is suspected of having a urinary tract infection. Which of the following specimens should be collected for a routine urinalysis and urine culture?
(a) First morning specimen
(b) Timed collection
(c) Midstream “clean catch”
(d) Random specimen
(c) Midstream “clean catch”
A 35-year-old diabetic women is suspected of developing renal insufficiency. Which of the following specimens should be obtained to determine the amount of creatinine being excreted in the urine?
(a) 2-hour postprandial
(b) 12-hour timed collection
(c) 24-hour timed collection
(d) Midstream “clean catch”
(a) 2-hour postprandial
An unpreserved urine specimen collected at midnight is kept at room temperature until the morning hospital shift. Which of the following changes will most likely occur.
(a) Decrease in urine color and clarity
(b) Decrease in pH and S.G.
(c) Decrease in glucose and ketones
(d) Decrease in bacteria and nitrite
(c) Decrease in glucose and ketones
A urine specimen containing the substance indicated is kept unpreserved at room temperature for 4 hours. Identify the probable change to that substance. (i.e. Increase, decrease, or no change)
Bacteria
Increase
A urine specimen containing the substance indicated is kept unpreserved at room temperature for 4 hours. Identify the probable change to that substance. (i.e. Increase, decrease, or no change)
Bilirubin
Decrease
A urine specimen containing the substance indicated is kept unpreserved at room temperature for 4 hours. Identify the probable change to that substance. (i.e. Increase, decrease, or no change)
Glucose
Decrease
A urine specimen containing the substance indicated is kept unpreserved at room temperature for 4 hours. Identify the probable change to that substance. (i.e. Increase, decrease, or no change)
Ketones
Decrease
A urine specimen containing the substance indicated is kept unpreserved at room temperature for 4 hours. Identify the probable change to that substance. (i.e. Increase, decrease, or no change)
pH
Increase
A urine specimen containing the substance indicated is kept unpreserved at room temperature for 4 hours. Identify the probable change to that substance. (i.e. Increase, decrease, or no change)
Protein
No Change
A urine specimen containing the substance indicated is kept unpreserved at room temperature for 4 hours. Identify the probable change to that substance. (i.e. Increase, decrease, or no change)
Urobilinogen
Decrease
Which of the following is the most common method used to preserve urine specimens?
(a) Acid addition
(b) Thymol addition
(c) Freezing
(d) Refrigeration
(d) Refrigeration
If refrigeration is used to preserve a urine specimen, which of the following may occur?
(a) Cellular or bacterial glycolysis will be enhanced
(b) Formed elements will be destroyed
(c) Amorphous crystals may precipitate
(d) Bacteria will proliferate
(c) Amorphous crystals may precipitate
Which of the following urine preservatives is acceptable for both urinalysis and urine culture?
(a) Boric acid
(b) Chlorhexidine
(c) Dowicil 200
(d) Formalin
(a) Boric acid
How much urine is usually required for a manually performed routine urinalysis?
(a) 5 to 10 mL
(b) 10 to 15 mL
(c) 20 to 30 mL
(d) 50 to 100 mL
(b) 10 to 15 mL
Which of the following substances is high in urine than in any other body fluid?
(a) Chloride
(b) Creatinine
(c) Glucose
(d) Protein
(b) Creatinine
