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Test Mnemonic HMSU Heavy Metals Screen, 24 Hour, Urine

Reporting Name

Heavy Metals Scrn, 24 Hr, U

Profile Information

Test ID Reporting Name Available Separately Always Performed
ASHMS Arsenic, 24 Hr, U Yes, (order ASU) Yes
PBS Lead, 24 Hr, U Yes, (order PBU) Yes
CDHMU Cadmium, 24 Hr, U Yes, (order CDU) Yes
HGHMS Mercury, 24 Hr, U Yes, (order HGU) Yes

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Urine


Specimen Required


Collection Container/Tube: Clean, plastic aliquot container with no metal cap or glued insert

Submission Container/Tube: Plastic, 10-mL urine tube (T068)

Specimen Volume: 10 mL

Collection Instructions:

1. Collect urine for 24 hours.

2. Refrigerate specimen within 4 hours of completion of 24-hour collection.

3. Patient should not eat seafood for a 48-hour period prior to start of collection.

4. See Trace Metals Analysis Specimen Collection and Transport in Special Instructions for complete instructions.

Additional Information:

1. 24-Hour volume is required.

2. See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens in Special Instructions for multiple collections.

3. High concentrations of gadolinium and iodine are known to interfere with most metals tests. If either gadolinium-or iodine-containing contrast media has been administered, a specimen should not be collected for 96 hours.


Specimen Minimum Volume

2 mL

Specimen Stability Information

Specimen Type Temperature Time
Urine Refrigerated (preferred) 7 days
  Frozen  7 days

Reference Values

ARSENIC

0-35 mcg/specimen

Reference values apply to all ages.

 

LEAD

0-4 mcg/specimen

Reference values apply to all ages.

 

CADMIUM

0-15 years: not established

≥16 years: 0.0-1.3 mcg/specimen

 

MERCURY

0-15 years: not established

≥16 years: 0-9 mcg/specimen

Toxic concentration: >50 mcg/specimen

The concentration at which toxicity is expressed is widely variable between patients. 50 mcg/specimen is the lowest concentration at which toxicity is usually apparent.

Day(s) and Time(s) Performed

Monday through Friday; 7 p.m., Saturday; 2 p.m.

Test Classification

See Individual Test IDs

CPT Code Information

82175-Arsenic

82300-Cadmium

83655-Lead

83825-Mercury

LOINC Code Information

Test ID Test Order Name Order LOINC Value
HMSU Heavy Metals Scrn, 24 Hr, U In Process

 

Result ID Test Result Name Result LOINC Value
8678 Cadmium, 24 Hr, U 5612-7
8644 Arsenic, 24 Hr, U 5587-1
2549 Mercury, 24 Hr, U 6693-6
8600 Lead, 24 Hr, U 5677-0
2548 Pb Concentration 20625-0
26627 Hg Concentration 5689-5
2547 As Concentration 21074-0
TIME4 Collection Duration 13362-9
VL16 Total Volume 3167-4
2654 Cd Concentration 5611-9

Method Name

Inductively Coupled Plasma-Mass Spectrometry (ICP-MS)

Urine Preservative Collection Options

Ambient

No

Refrigerated

Preferred

Frozen

Yes

6N HCl

Yes

50% Acetic Acid

Yes

Na2CO3

No

Toluene

Yes

6N HNO3

No

Boric Acid

No

Thymol

No