Urine (Biochimie) Flashcards
(253 cards)
The average daily output of urine is:
- 200 ml
- 500 ml
- 1200 ml
- 2500 ml
3 - 1200 ml
An unidentified fluid is received in the laboratory with a request to determine whether the fluid is urine or another body fluid. Using routine laboratory tests, what tests would determine that the fluid is most probably urine:
- glucose and ketones
- urea and creatinine
- uric acid and amino acids
- protein and amino acids
2 - Urea and creatinine
The primary inorganic substance found in urine is:
- sodium
- phosphate
- chloride
- calcium
3 - chloride
A patient presenting with polyuria, nocturia, polydipsia, and a low urine specific gravity is exhibiting symptoms of:
- diabetes insipidus
- diabetes mellitus
- urinary tract infection
- uremia
1 - diabetes insipidus
A patient with oliguria might progress to having:
- nocturia
- polyuria
- polydipsia
- anuria
4 - Anuria
All of the following are characteristics of recommended urine containers except:
- a flat bottom
- a capacity of 50 ml
- a snap on lid
- are disposable
3 - a snap on lid
Labels for urine containers are:
- attached to the container
- attached to the lid
- placed on the container prior to collection
- not detachable
3 - placed on the containor prior to collection
A urine specimen may be rejected by the laboratory for all of the following reasons except the fact that the:
- requisition states the specimen is catheterized
- specimen contains toilet paper
- label and requisition do not match
- outside of the container has fecal material contamination
4 - outside of the container has fecal material contamination
A cloudy specimen received in the laboratory may have been preserved using:
- boric acid
- chloroform
- refrigeration
- formalin
1 - boric acid
For general screening the most frequently collected specimen is a:
- random one
- first morning
- midstream clean-catch
- timed
1 - random one
The primary advantage of a first morning specimen over a random specimen is that it:
- is less contaminated
- is more concentrated
- is less concentrated
- has a higher volume
2 - is more concentrated
If a patient fails to discard the first specimen when collecting a timed specimen the:
- specimen must be recollected
- results will be falsely elevated
- results will be falsely decreased
- both 1 and 2
4 - both 1 and 2
The primary cause of unsatisfactory results in an unpreserved routine specimen not tested for 8 hours is:
- bacterial growth
- glycolysis
- decreased pH
- chemical oxidation
1 - bacterial growth
Prolonged exposure of a preserved urine specimen to light will cause:
- decreased glucose
- increased cells and casts
- decreased bilirubin
- increased bacteria
3 - decreased bilirubin
Which of the following would be least affected in a specimen that has remained unpreserved at room temperature for more than 2 hours:
- urobilinogen
- ketones
- protein
- nitrite
3 - protein
Bacterial growth in an unpreserved specimen will:
- decrease clarity
- increase bilirubin
- decrease pH
- increase glucose
1 - decrease clarity
The most sterile specimen collected is a:
- catheterized
- midstream clean-catch
- three-glass
- suprapubic aspiration
4 - suprapubic aspiration
Which of the following would not be given to a patient prior to the collection of a midstream clean-catch specimen:
- sterile container
- iodine cleanser
- antiseptic towelette
- instructions
2 - iodine cleanser
Urine specimen collection for drug testing requires the collector to do all of the following except:
- inspect the specimen color
- perform reagent strip testing
- read the specimen temperature
- fill out a chain of custody form
2 - perform reagent strip testing
The concentration of a normal urine specimen can be estimated by which of the following:
- color
- clarity
- foam
- odor
1 - color
The normal yellow color of urine is produced by:
- bilirubin
- hemoglobin
- urobilinogen
- urochrome
4 - urochrom
The presence of bilirubin in a urine specimen produces a:
- yellow foam when shaken
- white foam when shaken
- cloudy specimen
- yellow-red specimen
1 - yellow foam when shaken
A urine specimen containing melanin will appear:
- pale pink
- dark yellow
- blue green
- black
4 - black
A patient with a viscous orange specimen may have been:
- treated for a urinary tract infection
- taking vitamin B pills
- eating fresh carrots
- taking antidepressants
1 - treated for a urinary tract infection