MLSP: Urine (LAB) Flashcards
T or F
The 2 responsibilities Medtech have when it
comes to urine collection?
1. Instruct the patient on how to properly collect
his or her urine
2. Receive our specimen (wear PPE)
True
T or F
Clean, dry, leak-proof containers, screw top lids,
wide mouth, clear. Disposable containers are recommended
True
T or F
Gloves should be worn at all times when in contact with the specimen
True
Specimens in unlabeled containers
Nonmatching labels and requisition forms
Specimens contaminated with feces or toilet paper
REASONS FOR REJECTING URINE
Containers with contaminated exteriors
Specimens of insufficient quantity
Specimens that have been improperly transported
REASONS FOR REJECTING URINE
T or F
SPECIMEN INTEGRITY
Specimens should be delivered to the laboratory
promptly and tested withing 2 hours
True
T or F
SPECIMEN INTEGRITY
A specimen that cannot be delivered and tested
within 2 hours should be refrigerated or have an
appropriate chemical preservative added
True
4 tests in the physical examination of urine
color, clarity, volume, and odor
Pale yellow, yellow, dark yellow, and amber
URINE COLOR
Dark Yellow or Amber
ABNORMAL URINE COLOR
presence of the abnormal
pigment bilirubin
Dark Yellow or Amber
administration of phenazopyridine
(pyridium) or azogantrisin compounds to persons
with urinary tract infections
Yellow-orange
Presence of blood, commonly seen in menstruating patients
Red
glomerular bleeding
Brown Urine containing Blood
melanin or homogentisic acid,
levodopa, methyldopa, phenol derivatives, and
metronidazole (Flagyl)
Brown or black
bacterial infections, including urinary
tract infection by Pseudomonas species and
intestinal tract infections
Blue/Green
CLARITY
No visible particulates, transparent
Clear
CLARITY
Few particulates, print easily seen through urine
Hazy
CLARITY
Many particulates, print blurred through urine
Cloudy
CLARITY
Print cannot be seen through urine
Turbid
CLARITY
May precipitate or be clotted
Milky
T or F
You will need paper with print; to be placed at
the back of the urine sample to test the clarity of urine
True
ODOR
Normal
Aromatic
ODOR
Bacterial decomposition, urinary tract infection
Foul, ammonia-like
ODOR
Ketones (diabetes mellitus, starvation, vomiting)
Fruity, sweet
ODOR
Maple syrup urine disease
Maple syrup
ODOR
Phenylketonuria
Mousy
ODOR
Tyrosinemia
Rancid
ODOR
Isobaleric acidemia
Sweaty feet
ODOR
Methionine malabsorption
Cabbage
ODOR
Contamination
Bleach
Sometimes called “dip strips”
REAGENT STRIPS
Consist of chemical- impregnated absorbent
pads attached to a plastic strip
REAGENT STRIPS
A color-producing
chemical reaction takes
place when the absorbent
pad comes in contact with
urine
REAGENT STRIPS
T or F
10 parameter reagent
strip (10 little square: you
can do 10 chemical tests in 1 going)
True
most concentrated]– slightly acidic pH of 5.0-6.0
First morning specimen
wide range of value]– 4.5 to 8.0
Normal random samples
methyl red, bromthymol blue
Reagents
Aid in determining the existence of systemic acid-
base disorders of metabolic or respiratory origin
pH
Most indicative of renal disease
Protein
> _ 30 mg/dL (300 mg/L)
Clinical proteinuria
<10 mg/dL or 100 mg per 24 hrs
Normal urine
Detection and monitoring of diabetes mellitus
GLUCOSE
-Highly buffered alkaline urine
- Pigmented specimens
- Phenazopyridine
- Quaternary ammonium compounds
False-positive
- Proteins other than albumin
- Microalbuminuria
False Negative
Contamination by oxidizing agents and
detergents
False-positive
- High levels of ascorbic acid
- High levels of ketones
- High specific gravity
- Low temperatures
- Improperly preserved specimen
False-negative
Represents three intermediate products of fat
metabolisms:
- Acetone
- Acetoacetic acid
- Beta-hydroxybutyric acid
Ketones
Shows a deficiency in insulin, indicating the need to
regulate dosage
KETONURIA
Reading Time
30 seconds after dipping in the urine
Bilirubin and Glucose
Reading Time
40 seconds
Ketone and Ascorbate
Reading Time
45 seconds
Specific gravity
Reading Time
60 seconds
Blood, pH, Protein, Urobilinogen, and Nitrite
Reading Time
120 seconds / 2 minutes
Leukocytes
Measures only ionic solutes
SPECIFIC GRAVITY
Infections caused by trichomonas, chlamydia, yeast,
and inflammation of renal tissues
LEUKOCYTE ESTERASE
Provides a rapid screening test for the presence of urinary tract infection (UTI)
Nitrite
An early indication of liver disease
BILIRUBIN
May be present in the urine either in the form of intact red blood cells (hematuria)
Blood
Circulates in the blood en route to the liver, it
passes through the kidney and is filtered by the
glomerulus
UROBILINOGEN
10-15 mL is centrifuged in a conical tube
SPECIMEN VOLUME
5 minutes at a relative centrifugal force (RCF) of 400
CENTRIFUGATION
Sediment should remain in the tube after
decantation
SEDIMENT PREPARATION
Took long (10-15 minutes)
PREPARATION AND EXAMINATION OF URINE
SEDIMENT
Warming the specimen to 37C prior to centrifuging may dissolve some of these crystals
PREPARATION AND EXAMINATION OF URINE
SEDIMENT