Urinalysis Correlations
Urinalysis and Body
Fluids Review 512
PARAMETERS RELATIONSHIPS/CONSIDERATIONS
pH/microscopic
pH/nitrite/leukocyte esterase (LE)/microscopic
Protein/microscopic
Protein/blood/microscopic
Protein/specific gravity (SG)
Glucose/ketones
Glucose/microscopic
Glucose/protein/microscopic
Blood/microscopic
Ck pH when identifying crystals.
RBCs, WBCs, & casts lyse at alk pH.
With bacterial UTI, usually have pos nitrite, pos LE. Ck for bacteria & WBCs. Bacteria
convert urea to ammonia, ↑pH.
Protein may indicate renal disease. Ck for casts.
Large amounts of blood or myoglobin can cause pos protein. Ck for RBCs. Present with
hematuria, not with hemoglobinuria or myoglobinuria.
↑SG can cause false-pos trace protein. Trace protein more significant in dilute urine.
Ketones present with uncontrolled diabetes mellitus.
Yeast thrives in ↑glucose. WBCs should be present if true yeast infection.
Renal disease is common complication of diabetes mellitus. Ck for casts.
Pos blood, no RBCs: Blood rxn could be due to hemoglobin or myoglobin, or false pos
due to bacterial peroxidase. Ck for bacteria.
Neg blood, RBCs seen: Could be false-neg blood due to ↑ascorbic acid. Yeast, or
monohydrate calcium oxalate crystals could be misidentified as RBCs.
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