Detail Description
Clinical Significance
Urinalysis with Reflex to Microscopic - Dipstick urinalysis measures chemical constituents of urine. Microscopic examination helps to detect the presence of cells, bacteria, yeast and other formed elements.
Preferred Specimen(s)
10 mL urine - Urinalysis transport tube (yellow-top, blue fill line, preservative tube)
Alternative Specimen(s)
Refrigerated unpreserved pediatric sample • Yellow/red swirl-topped conical transport tube with preservative
Minimum Volume
Preserved: 1 mL
Unpreserved (pediatric only): 1 mL
Transport Container
Yellow-top, blue fill line urinalysis transport tube
Transport Temperature
Preserved: Room temperature
Pediatric Unpreserved: Refrigerated (cold packs)
Specimen Stability
Preserved urine
Room temperature: 72 hours
Refrigerated: 72 hours
Frozen: Unacceptable
Unpreserved urine
Refrigerated: 24 hours - Pediatric specimen
Reject Criteria
Unpreserved specimen (adults)
Includes
A microscopic examination is performed, when appropriate, at an additional charge (CPT code(s): 81015).
Methodology
Reagent Impregnated Strips/Tablets/Microscopic Examination if urine macroscopic or dipstick indicates
Reference Range(s)
Color Yellow
Appearance Clear
Specific Gravity 1.001-1.035
pH 5.0-8.0
Glucose Negative
Bilirubin Negative
Ketones Negative
Occult Blood Negative
Protein Negative
Nitrite Negative
Leukocyte Esterase Negative
WBC ≤5 /HPF
RBC ≤2 /HPF
Squamous Epithelial Cells ≤5 /HPF
Transitional Epithelial ≤5 /HPF
Renal Epithelial Cells ≤3 /HPF
Bacteria None seen
Calcium Oxalate Crystals None or Few
Triple Phosphate Crystals None or Few
Uric Acid Crystals None or Few
Amorphous Sediment None or Few
Crystals None seen
Hyaline Casts None seen
Granular Casts None seen
Casts None seen
Yeast None seen