UNIT 2 LAB Flashcards
(31 cards)
urine is the
first part of urinalysis after the specimen collection.
physical examination or gross examination
Urine color, normally and usually, is yellow due to the
urochrome
also contribute to urine color formation.
urochrome
urobilin
uroerythrin (pink)
High fluid intake can cause pale colored urine, which is also indicated by having low specific gravity
TRUE
Take note also that changes
in color can happen if urine is not processed immediately and is not properly preserved; darkening of urine can happen because of oxidation or reduction of metabolites
TRUE
the density of a solution compared with
the density of, similar volume of distilled water at a similar
temperature.
specific gravity
is used in the
evaluation of renal tubular function, assessing the kidney’s
capacity to concentrate the glomerular filtrate, Specific gravity also a way to check if the submitted specimen is anurine specimen;
specific gravity
normal random urine specimen may range from
1.002 to 1.035
The usual urine odor is
faint with an aromatic odor.
A specimen with bacterial
overgrowth has
ammoniacal and fetid odor
More than 2000 mL of urine output in 24 hours can be referred to as
polyuria
can be due to excessive
water intake or polydipsia or due to certain drugs or
substances that are considered diuretics, like alcohol, caffeine, and thiazides.
polyuria
decreased urine output is termed
oliguria
is defined as the total volume of urine excreted in
24 hours is less than 500 mL.
oliguria
suppression of urine formation,
the condition is referred to as
anuria
refers to the transparency or turbidity of a urine
specimen.
clarity
Determines the concentration of dissolved particles in a specimen by measuring refractive index
Temperature correction is not necessary but requires corrections for glucose and protein
REFRACTOMETER
Changes in colligative
properties by particle
number.
osmolality
pKa changes a
polyelectrolyte by ions
present.
reagent strips
Small volume of specimen
Temperature corrections are
not necessary
Easy to use and calibrate
Requires a light source
Corrections for glucose and
protein must be calculated
REFRACTOMETER
consists of a weighted float attached to a scale that has been
calibrated in terms of urine specific gravity.
urinometer
Easy to observe
urinometer
based on the principle that the frequency of a sound wave
entering a solution changes in proportion to the density of
the solution
harmonic oscillation densitometry
affected only by the number of particles
present
osmolality
