MICHIGAN INNOVATIVE DIAGNOSTICS

Manual microscopic evaluation of centrifuged urine sediment used to identify cells, casts, crystals, and organisms indicative of urinary tract, renal, or metabolic abnormalities.

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This test is never ordered as a stand-alone test. It is performed only as a reflex, either from Macroscopic UA (UAWR) when predefined chemical/physical criteria are met, or as a built-in component of the Complete Urinalysis Test (UACOM).​

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LIS PANEL CODE: (MID) UAMICRO

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INDIVIDUAL LIS TEST CODES INCLUDED WITHIN PANEL: WBCS, RBCS, BACT, EPIS, CASTS, EPIT, EPIR, CASTC, CASTG, CASTW, YEAST, MUCUS, CRYU, CAOX, STRU, CRYAM, CRYCH, CRYSIS, CRYT, CRYBIL, HIPUR, CACARB, MUCRY, AMORPH, LIPUR, SPERM, TRICH

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CPT CODE: 81015

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ALIASES: Urine Micro, UA Microscopy, Microscopic Urinalysis, Urine Sediment Exam

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METHODOLOGIES: Manual Microscopy (Centrifuged Sediment, Brightfield Examination)

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SPECIMEN:

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- Type: Clean-Catch Urine

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- Container: Vacuette Urinalysis (Plain Yellow-Top) Tube

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- Minimum Volume Required: 3 mL

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- Storage/Handling: Specimen should be capped tightly and transported to the laboratory promptly. If testing cannot be performed within the stability window listed below, refrigerate immediately.

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NOTE: Do NOT centrifuge or add preservative unless otherwise instructed; refrigeration is preferred over freezing, as freezing destroys formed elements needed for microscopic exam.

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- Stability:   

 

Room Temperature (20-25 °C): 2 hours

Refrigerated (2-8 °C): 1 day (please note however that cellular degeneration can occur as soon as several hours post-collection)

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- Turnaround Time: 24 hours from receipt.

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Special Instructions: No separate specimen collection or order is required. Results will be reported as an addition to the originating UAWR or UACOM order.

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REJECTION REASONS: Excessive Mucus, Color Interference, QNS, Contamination, Stability Violation, Expired Container, Incorrect Container

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REFERENCE RANGES:​

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Males & Females >= 1 year of age:

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White Blood Cells (WBCs): 0-5 / hpf

Red Blood Cells (RBCs): 0-2 / hpf

Bacteria (BACT): None seen, Rare

Squamous Epithelial Cells (EPIS): 0-5 / hpf

Hyaline Casts (CASTS): 0-5 / lpf

Transitional Epithelial Cells (EPIT): 0-5 / hpf

Renal Tubular Epithelial Cells (EPIR): None seen / hpf

Cellular Casts (CASTC): None seen / lpf

Granular Casts (CASTG): None seen / lpf

Waxy Casts (CASTW): None seen / lpf

Yeast (YEAST): None seen

Mucus Threads (MUCUS): None seen

Uric Acid Crystals (CRYU): None seen

Calcium Oxalate Crystals (CAOX): None seen

Struvite/Triple Phosphate Crystals (STRU): None seen

Ammonium Biurate Crystals (CRYAM): None seen
Cholesterol Crystals (CHOL): None seen

Cystine Crystals (CRYCYS): None seen

Tyrosine Crystals (CRYT): None seen

Bilirubin Crystals (CRYBIL): None seen

Hippuric Acid Crystals (HIPUR): None seen

Calcium Carbonate Crystals (CACARB): None seen

Monosodium Urate Crystals (MUCRY): None seen

Amorphous Sediment (AMORPH): None seen

Lipid Droplets (LIPUR): None seen

Sperm Cells (SPERM): None seen

Trichomonas (TRICH): None seen​​​

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INTERPRETING ABNORMAL QUALITATIVE FINDINGS:

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None seen = Absent = 0 / field

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Rare = Trace = 1-2 / field

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Few = 1+ (+) = 3-10 / field

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Moderate = 2+ (++) = 11-25 / field

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Many = 3+ (+++) = 26 or more / field​​

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Present = at least 1 of the target element was observed during microscopic exam.

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