Physical Examination of Urine Flashcards
The primary pigment responsible for normal urine color is
Urochrome
A dark yellow urine producing yellow foam may contain
Bilirubin
black urine indicates
melanin
The color of urine specimen containing blood can be contributed to all of the following except
Blood type of the patient
Urine specimen that turns black after standing may contain
Homogentistic acid
Which of the following specific gravity readings correlates with a pale yellow urine?
1.005
Specimens that contain intact red blood cells can be visually distinguished from specimens that contain hemoglobin because:
Intact red blood cells produce a cloudy specimen
Urine from a patient diagnosed with hepatitis will appear:
Amber
The pigment responsible for a pink precipitate in refrigerated urine is:
Uroerythrin
The presence of a white precipitate in freshly voided urine can be caused by:
Amorphous phosphates in alkaline urine
The addition of dilute acetic acid to a cloudy urine specimen will dissolve
Amorphous phosphate
Slightly warming a turbid urine specimen may dissolve
amorphous urates
an antidiuretic hormone deficiency is associated with a
low specific gravity
the specific gravity of urine is directly proportional to its
dissolved solids
a patient who has been diagnosed with diabetes mellitus will produce urine with
increased volume and increased specific gravity
if a refractometer reads 1.003 with distilled water, the medical laboratory scientist should
calibrate the refractometer by adjusting the set screw
a urine with the same specific gravity as the ultrafiltrate is called
isothenuric
a specimen with a specific gravity as the ultrafiltrate is called
radiographic contrast media
a patient with phenylketonuria has an odor of
musty
what color would a pseudomonas infection cause
green
the refractive index compares
light velocity in air with light velocity in solutions
specific gravity is a measure of
density
a clinically significant cause of turbidity is
squamous epithelial cells
which of the following statements concerning measurement of specific gravity by refractometer is not true
the refractometer must be calibrated after every specimen
which of the urinalysis results needs further investigation
A port wine colored specimen with a negative test for blood
results of a specific gravity reading obtained by refractometer in the urology clinic do not agree with the reading obtained by the laboratory’s automated reagent strip reader. The laboratory should
report the results from the reagent strip reader
bacterial decomposition of urea produces urine that has an odor resembling
ammonia
A urine specimen that remains at room temperature for several hours may develop a darker yellow color
true
a pale yellow urine is a primary indication of impaired renal function
false
clear red urine and red plasma are associated with myoglobin
true
collection of a midstream clean-catch specimen can affect the clarity of a urine specimen
true
urine specific gravity can be measured by both physical and chemical methods
true
urine specific gravity is equally influenced by the presence of glucose and sodium
false
the density of a urine specimen can affect the frequency of a sound wave
true
a supervisor should be concerned if a specific gravity reading of 1.008 is reported on a turbid urine specimen
false
urine with a strong ammonia odor is an indication of a urinary tract infection
true
osmolality is affected only by the number of particles present in urine
true
