Flashcards in Test 4 Urinalysis Deck (80):
Which specimen is most concentrated and best for routine testing?
First morning specimen
What is the type of specimens?
RANDOM (most used)
2 HOUR POST PRANDIAL
CLEAN CATCH, MIDSTREAM
What is BEST FOR CULTURE OTHER THAN CATHETERIZED OR SUPRAPUBIC
Which specimen are for glucose testing?
Examples of SPECIFIC SECURITY PROCEDURES
Water turned off
What causes the yellow pigment?
Low specific gravity is what color?
Pale yellow "straw"
High specific gravity is what color?
PINK/RED color is?
RBC or hemoglobin
Brown color is?
Dark yellow is?
Bilirubin (foams on top when shaken)
Contaminate of pyridium dye
What is the suprapubic specimen
the doctor inserts a needle into the bladder to collect urine.
Chain of custody with what type of screening?
BQ: The primary chemical constituents of normal urine are:
Urea, chloride, and water
BQ: An unidentified fluid is received in the laboratory with a request to determine if fluid is urine or another body fluid. What tests would determine that the fluid is urine?
Urea and creatinine
BQ: A person exhibiting oliguria would have a daily urine volume of;
BQ: A patient presenting with polyuria, polydipsia, nocturnal, and high urine specific gravity...what is the disorder?
BQ: An unreserved specimen collected at 8am and kept at room temp and does not arrive until mid afternoon can be expected to have:
Decreased glucose and ketones Increased bacteria and nitrate
BQ: A specimen containing precipitated amorphous unrated may have been preserved using:
BQ: What 3 changes will affect the results of a microscopic exam of urine if not tested within 2hours?
Increase bacteria Decrease RBC and casts
BQ: Best preservation of urinary sediments:
Boric acid and thymol
BQ: What chemical can be used to preserve specimen for culture and routine urinalysis?
BQ: What is the specimen of choice for routine urinalysis?
First morning specimen
BQ: Quantitative urine tests are performed on:
BQ: Cessation of urine flow is termed:
BQ: What type of urine specimen should be collected from patient who complains of painful urination and physician has ordered a routine UA and urine culture?
BQ: Concentration of a normal urine specimen can be estimated by:
BQ: Normal yellow color urine is produced by:
BQ: A yellow-brown specimen that produces a yellow foam when shaken can be suspected of containing:
BQ: Urine turns black after standing. May contain:
Homogentisic acid, melanin, or methemoglobin
BQ: Specimens that contain intact RBCs can be visually distinguished from those that contain hemoglobin because:
RBCs produce a cloudy specimen
BQ: Specimens from patients receiving treatment for urinary tract infections frequently appear:
Viscous and orange
BQ: Freshly voided normal urine is usually clear; however if it is alkaline, a white turbidity may be present due to:
Amorphous phosphates and carbonates
BQ: Microscopic examination of a clear urine that produces pink precipitate after refrigeration will show:
BQ: Under what conditions will a port-wine color be observed in a urine specimen?
Urine contains prophyrins
BQ: Specific gravitates likely to correlate with a dark yellow urine?
BQ: In what circumstance might a sediment be slightly warmed prior to microscopic exam?
To dissolve amorphous urates
BQ: A urine specific gravity measured by refractometer is 1.029 and the temperature of urine is 14 C. Specific gravity should be reported as:
BQ: Refractive index compares:
Light velocity in air with light velocity in solutions
BQ: Refractometers are calibrated using:
Distiller water and sodium chloride
BQ: A urine specimen with a specific gravity of 1.008 has been diluted 1:5 the actual specific gravity:
BQ: A specific gravity of 1.005 would be considered:
BQ: A strong odor of ammonia in a urine specimen could indicate:
Urinary tract infection
BQ: Leaving a reagent strip in the specimen to long will:
Cause reagents to leach from the pads
BQ: Failure to mix a specimen prior to inserting the reagent strip will primarily affect the:
BQ: Testing a refrigerated specimen that has not warmed to room temp will adversely affect:
BQ: The reagent strip reaction that requires the longest reaction time is the:
Leukocyte set raise
BQ: Quality control of reagent strips is performed:
Using pos and neg controls
When results are questionable
At least once every 24 hours
BQ: The principle of the reagent strip test for pH is the:
Double indicator reaction
BQ: A urine specimen with a pH of 9.0:
Should be recollected
BQ: The principle of the protein error of indicators reaction is that:
Albumin accepts hydrogen ions from the indicator
BQ: Testing for microalbuminuria is valuable for monitoring patients with:
Cardiovascular disease risk
BQ: All the following are true for the Micral-test for microalbuminuria:
Run on first morning specimens
It contains an antibody-enzyme conjugate
Unbound antibody attaches to immobilized albumin
BQ: The principle of creatinine reagent pad on microalbumin reagent strips is:
BQ: The purpose of performing an albumin:creatinine ratio is to:
Correct for hydration in random specimens
BQ: A patient with normal blood glucose and a positive urine glucose should be further checked for:
BQ: The principle of the reagent strip tests for glucose is the:
Double sequential enzyme reaction
BQ: The primary reason for performing a Clinitest is to:
Check for newborn galactosuria
BQ: Three intermediate products of fat metabolism:
BQ: The most significant reagent strip test that is associated with a positive ketone result is:
BQ: The primary reagent strip test for ketones is:
BQ: Causes Ketonuria:
BQ: Urinalysis on a patient with back and abdominal pain performed to check for:
Associated with transfusion reactions
Clear,red urine and red plasma
Precipitated by ammonium sulfate
Produced hemosiderin granules in urinary sediments
Clear, red urine and pale yellow plasma
Associated with rhabdomylosis
Not precipitated by ammonium sulfate
Associated with acute renal failure
BQ: The principle of the reagent strip test for blood is based on the:
Peroxidase activity of heme
BQ: The principle of the reagent strip test for bilirubin is the:
BQ: An elevated urine bilirubin with normal urobilinogen is indicative of:
BQ: A false negative bilirubin reaction is:
Specimen exposed to light
BQ: Purpose of a special mat supplied with the Ictotest tablets is:
Bilirubin remains on the surface of the mat
Handling and storage of dipsticks:
Room temp storage
Urine at room temp
Dessicant - removes moisture
No volatile flames
Use before exp. date
Measures acidity or alkalinity of specimen
Useful for ID crystals
Urine is acid most of the time
Usually 4.5 to 8.0
pH of 9.0 indicates proliferation of bacteria - urease breaking down urea - old specimen
Double indicator system
Methyl red and bromthymol blue
One indicator chg color at low pH and the other at alkaline pH
Absence in blood significant
Overflow (prerenal) or indicate renal damage
Exercise, dehydration, muscle injury, glomerular disorders etc can cause proteinuria
Error of indicators - two color normally chg with chg in pH
pH is held constant by a buffer (3.0)
Sulfosalicylic acid - confirmatory test for protein - turbidity test
Detects all proteins and "Bence-Jones" proteins in multiple myeloma patients
Dipstick specific for albumin