ASCRU - Specimen: Arsenic/Creatinine Ratio, Random, Urine

Test Catalog

Test Name

Test ID: ASCRU    
Arsenic/Creatinine Ratio, Random, Urine

Specimen Type Describes the specimen type validated for testing

Urine

Advisory Information

Inorganic arsenic testing is only performed and reported for patients with a total arsenic output that is greater than 35 mcg arsenic per gram creatinine (>35 mcg/g). To acquire inorganic arsenic results regardless of total arsenic output, order ASFRU / Arsenic Fractionation, Random, Urine or ASFR / Arsenic Fractionation, 24 Hour, Urine, as deemed by specimen collection.

Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Patient Preparation:

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

2. 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.

Supplies: Urine Tubes, 10 mL (T068)

Collection Container/Tube: Clean, plastic urine collection container

Submission Container/Tube: Plastic, 10-mL urine tube (T068) or clean, plastic aliquot container with no metal cap or glued insert

Specimen Volume: 6 mL

Collection Instructions:

1. Collect a random urine specimen.

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

Specimen Minimum Volume The amount of sample necessary to provide a clinically relevant result as determined by the Laboratory.

1.8 mL

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected

Hemolysis

NA

Lipemia

NA

Icterus

NA

Other

NA

Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperatures are also included.

Specimen TypeTemperatureTime
UrineRefrigerated (preferred)28 days
 Ambient 28 days
 Frozen 28 days