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Beaumont Laboratory

Hemosiderin in Urine Sediment

Urine Iron Stain, Urine Hemosiderin, Prussian Blue Stain, Urine, Hemosiderin, Urine , Antrim #20130, EPIC: LAB5150, SOFT: HMSDU

Specimen Collection Criteria

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

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

Physician Office/Drawsite 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). (Min: 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.

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 1 hour
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): 7 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 Code

83070.

Test Codes

Antrim #20130, EPIC: LAB5150, SOFT: HMSDU

Last Updated

03/02/2017

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This directory currently reflects information only for specimens collected and/or processed at the Farmington Hills, Grosse Pointe, Royal Oak, and Troy campuses.