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HelpHeavy Metals Screen, with Reflex, 24 Hour, Urine
Additional Codes
LAB398
Specimen Required
1. For the 48-hour period prior to the start of collection, as well as during the collection, patient should not eat seafood.
2. High concentrations of gadolinium and iodine are known to potentially interfere with most inductively coupled plasma mass spectrometry-based metal tests. If either gadolinium- or iodine-containing contrast media has been administered, a specimen should not be collected for 96 hours.
Supplies: Urine Tubes, 10 mL (T068)
Collection Container/Tube: Clean, plastic aliquot container with no metal cap or glued insert
Submission Container/Tube: Plastic, 10-mL urine tube
Specimen Volume: 6 mL
Collection Instructions:
1. Collect urine for 24 hours.
2. Refrigerate specimen within 4 hours of completion of 24-hour collection.
3. See Metals Analysis Specimen Collection and Transport for complete instructions.
Additional Information: See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens for multiple collections.
Profile Information
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| ASHU | Arsenic, 24 Hr, U | Yes, (order ASU24) | Yes |
| CDHMU | Cadmium, 24 Hr, U | Yes, (order CDU) | Yes |
| HGHU | Mercury, 24 Hr, U | Yes, (order HGU) | Yes |
| PBHU | Lead, 24 Hr, U | Yes, (order PBU) | Yes |
Reflex Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| SPASU | Arsenic Speciation, 24 Hr, U | Yes | No |
Special Instructions
Specimen Type
UrineSpecimen Minimum Volume
3 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Refrigerated (preferred) | 7 days | |
| Frozen | 7 days |
Reference Values
ARSENIC:
0-17 years: Not established
≥18 years: <35 mcg/24 h
CADMIUM:
0-17 years: Not established
≥18 years: <0.7mcg/24 h
MERCURY:
0-17 years: Not established
≥18 years: <2 mcg/24 h
Toxic concentration: >50 mcg/24 h
The concentration at which toxicity is expressed is widely variable between patients.
50 mcg/24 h is the lowest concentration at which toxicity is usually apparent.
LEAD:
0-17 years: Not established
≥18 years: <2 mcg/24 h
Day(s) Performed
Monday through Friday
Report Available
1 to 3 daysSpecimen Retention Time
14 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
82175
82300
83825
83655
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| HMU24 | Heavy Metal Scrn w/Reflex, 24 Hr, U | 94575-8 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 8678 | Cadmium, 24 Hr, U | 5612-7 |
| 48539 | Arsenic, 24 Hr, U | 5587-1 |
| 92408 | Mercury, 24 Hr, U | 6693-6 |
| 92409 | Lead, 24 Hr, U | 5677-0 |
| TIME4 | Collection Duration | 13362-9 |
| 92215 | Total Arsenic Concentration | 21074-0 |
| VL16 | Total Volume | 3167-4 |