MARY ROSELLE DESIREE A. VERALLO MS. STEPHANY MAE CHI
3BSMT1 MT 111.1 – ANALYSIS OF URINE AND BODILY FLUIDS, LAB.
MIDTERM ASSIGNMENT #1
TESTS PRINCIPLE OF THE
TEST
POSITIVE/NEGATIVE
COLOR REACTIONS
POSITIVE
INTERFERENCES
NEGATIVE
INTERFERENCES CLINICAL CORRELATIONS
pH Reagent Strip Double-pH indicator
system. It could give
distinct color changes.
- Uses methyl red
and bromothymol
blue as an
indicator.
- Methyl red changes
from red to yellow
with a pH of 4 to 6.
- Bromothymol blue
turns yellow to deep
blue if the pH is 6 to
9.
- Runover from the adjacent pads
- Growth of the bacteria in the urine
- Specimens are already old
- No interference known
- Identification of respiratory
or metabolic acidosis,
ketosis, or alkalosis
- Identification of the defects
in renal tubular secretion
and reabsorption of acids
and bases which could be
an indicator of renal tubular
acidosis
- Early identification of renal
calculi formation and
prevention
- Early treatment for UTIs
- Identification of crystals that
could harm the urinary
system
- Determination of
unsatisfactory specimens
Correlation with other tests:
- Nitrite
- Leukocytes
- Microscopic such as
reporting of casts
Urine Specific Gravity Reagent
Strip
Ionic solutes present in
the urine cause protons
to be released from a
polyelectrolyte. If the
protons are released,
- Uses bromothymol
blue as an
indicator.
- Alkaline (negative)
would be blue with
- High
concentrations
of protein
which is
approximately
- Highly alkaline
urine (greater
than 6.5)
- In chem strips,
the glucose
- Monitors the hydration and
hydration
- Loss of renal tubular
concentrating ability
- An indication of Diabetes
