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Beaumont Laboratory

Stone Former, Urine 24 Hour

Stone Former Workup, Antrim #15840, EPIC: LAB5457, SOFT: STFRU

Instructions

Please refer to the Specimen Collection Manual for instructions on 24 Hour Urine Collection:

Specimen Collection Criteria

Collect: 24 hour urine specimen with no preservatives.

  • Keep 24 hour urine specimen iced or refrigerated during collection.
  • Include start and end dates and times for the collection period on the specimen container.
Urine Preservative Options
No Preservative
6N Hydrochloric Acid
Boric Acid (10g)
Sodium Carbonate
50% Acetic Acid
REQUIRED
Unacceptable
Unacceptable
Unacceptable
Unacceptable

Physician Office/Drawsite Specimen Preparation

Maintain specimens refrigerated (2-8°C or 36-46°F) prior to transport.

Preparation for Courier Transport

Transport: Entire 24 hour urine collection, refrigerated (2-8°C or 36-46°F).

Rejection Criteria

  • Random urine specimens.
  • Samples collected with any preservative.
  • Samples not kept refrigerated (2-8°C or 36-46°F).
  • Samples not collected and processed as indicated.

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): Unacceptable
Refrigerated (2-8°C or 36-46°F): 72 hours
Frozen (-20°C/-4°F or below): 3 weeks

Specimen Storage in Department Prior to Disposal:

Frozen (-20°C/-4°F or below): 14 days
Urine Citrate and Oxalate: Refrigerated (2-8°C or 36-46°F): 7 days

Laboratory

Royal Oak Automated Chemistry Laboratory.
Royal Oak Special Testing Laboratory.

Performed

Varies, once per week.
Results available within 7 days.

Reference Range

See individual assays for reference range.
This assay includes: Urine CalciumUrine Citric Acid, Urine Creatinine, Urine Magnesium, Urine Na/KUrine Oxalate, Urine Phosphorus, Urine Urea, and Urine Uric Acid.

Test Methodology

Potentiometry and Spectrophotometry.

Interpretation

This assay includes: Urine CalciumUrine Citric Acid, Urine Creatinine, Urine Magnesium, Urine Na/KUrine Oxalate, Urine Phosphorus, Urine Urea, and Urine Uric Acid.

Elevated levels of calcium, oxalate, magnesium, and uric acid or decreased levels of citric acid may increase the risk of renal calculi formation.

Clinical Utility

The stone former panel is useful in evaluating the likelihood of renal calculus formation and the type of calculus that may be formed. For definitive stone analysis, order Calculi Analysis. See individual tests for further details of their clinical significance.

CPT Code

Please see individual assays for CPT codes.
This assay includes: Urine CalciumUrine Citric Acid, Urine Creatinine, Urine Magnesium, Urine Na/KUrine Oxalate, Urine Phosphorus, Urine Urea, and Urine Uric Acid.

Test Codes

Antrim #15840, EPIC: LAB5457, SOFT: STFRU

Last Updated

03/07/2018

Microtainer® and Vacutainer® are registered trademarks of Becton, Dickinson and Company.
UroVysion® is a registered trademark of Abbott Laboratories. ThinPrep® is a registered trademark of Hologic, Incorporated.

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