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Hemosiderin in Urine Sediment (Southeast Michigan Only)

Urine Iron Stain, Urine Hemosiderin, Prussian Blue Stain, Urine, Hemosiderin, Urine

Test Codes

EPIC: LAB1231482

Department

Hematology

Specimen Collection Criteria

Collect: 50 mL random urine in a screw-capped container (preferred) or other sterile collection cup. (Minimum: 10 mL)

Specimens should be delivered to the Laboratory within one hour of collection to prevent leukocyte lysis.

Physician Office/Draw Specimen Preparation

Arrange for transportation to the Laboratory prior to specimen collection. Maintain specimens refrigerated (2-8°C or 36-46°F) prior to transport.

Preparation for Courier Transport

Transport: 50 mL urine, refrigerated (2-8°C or 36-46°F). (Minimum: 10 mL)

Rejection Criteria

• Specimens exceeding recommended time limits (one hour at room temperature, three hours refrigerated).
• Specimens with low cell counts or unacceptable volume may give unsatisfactory results but testing will still be attempted.

Inpatient Specimen Preparation

Transport specimen to the Laboratory immediately after collection for processing.

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 2 hours
Refrigerated (2-8°C or 36-46°F): 3 hours
Frozen (-20°C/-4°F or below): Unacceptable

Specimen Storage in Department Prior to Disposal:

Refrigerated (2-8°C or 36-46°F): 5 days

Laboratory

Royal Oak Hematology Laboratory
Troy Hematology Laboratory

Performed

Sunday – Saturday.
Results available in 24-72 hours.

Reference Range

Negative.

Test Methodology

Cytocentrifuge smears of urine sediment and the Prussian-Blue stain.

Interpretation

Hemosiderin is present in diseases involving a true siderosis of kidney parenchyma (hemochromatosis). It is also present 2-3 days after an acute hemolytic episode that produces hemoglobinemia and hemoglobinuria. Hemosiderin granules are found in intact renal tubular epithelial cells or occasionally in casts and may also be seen extracellularly.

Clinical Utility

This assay aids in the detection of hemochromatosis and hemoglobinuria. Hemosiderin is typically found in urine of acid and neutral pH, but not alkaline pH.

CPT Codes

83070

Contacts

Last Updated

10/30/2024