Casandra

Casandra Test Code MC72162Version 1 (DRAFT)

Performing Lab

Lab Mayo Clinic LabLab Test ID ASUOECPT Codes 82175, 82570

Arsenic Occupational Exposure, with Reflex, Random, Urine

Clinical Use

Use

Preferred screening test for detection of occupational exposure to arsenic in random urine specimens ([mayocliniclabs.com](https://www.mayocliniclabs.com/test-catalog/Overview/608895?utm_source=openai))

Special Instructions

Not provided.

Limitations

Patient should not eat seafood for 48 hours prior to collection; specimens should not be collected for 96 hours following administration of gadolinium- or iodine-containing contrast media; recommended sampling time is at end of work week ([mayocliniclabs.com](https://www.mayocliniclabs.com/test-catalog/Overview/608895?utm_source=openai))

Test Details

Methodology

Mass Spectrometry (LC-MS/MS)

Biomarkers

Creatinine

Analyte

Creatinine, Random, U

Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Total Arsenic

Analyte

Total Arsenic Concentration

Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

LOINC Codes

Order Codes

13463-5 - Arsenic/Creat Ur

Result Codes

2161-8 - Creat Ur-mCnc
13463-5 - Arsenic/Creat Ur
5586-3 - Arsenic Ur-mCnc

Result Turnaround Time

2-4 days

Specimen

Urine

Volume

6 mL

Minimum Volume

3 mL

Container

Clean, plastic urine container with no metal cap or glued insert; submission in plastic vial or clean, plastic aliquot container with no metal cap or glued insert ([mayocliniclabs.com](https://www.mayocliniclabs.com/test-catalog/Overview/608895?utm_source=openai))

Collection Instructions

Collect a random urine specimen; for metals analysis see Metals Analysis Specimen Collection and Transport; recommended end-of-work-week timing; no seafood 48 hours prior; no gadolinium or iodine contrast 96 hours prior ([mayocliniclabs.com](https://www.mayocliniclabs.com/test-catalog/Overview/608895?utm_source=openai))

Patient Preparation

No seafood 48 hours prior; no gadolinium- or iodine-containing contrast media for 96 hours prior; recommended end-of-work-week collection ([mayocliniclabs.com](https://www.mayocliniclabs.com/test-catalog/Overview/608895?utm_source=openai))

Causes for Rejection

All specimens will be evaluated at Mayo Clinic Laboratories for test suitability ([mayocliniclabs.com](https://www.mayocliniclabs.com/test-catalog/Overview/608895?utm_source=openai))

Stability Requirements

Temperature	Period
Refrigerated	28 days (preferred) ([testcatalog.org](https://www.testcatalog.org/show/ASUOE?utm_source=openai))
Frozen	28 days ([testcatalog.org](https://www.testcatalog.org/show/ASUOE?utm_source=openai))

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