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Unit Code 81345:
Magnesium, Quantitative, Feces

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.

10 mL of very liquid stool. Send specimen frozen

in container (Supply T291) supplied. See "Stool Collection

Information Sheet" in Special Instructions.

Note:    1. Do not send formed stool. In the event a formed

                 stool is submitted, the test will not be performed. The

                 report will indicate:  "A formed stool specimen was

                 submitted for analysis. This test was not performed

                 because it only has clinical value if performed

              on a watery stool specimen."

             2. Timed collections (24 hour) will also be accepted.

Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.

1 mL


The amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.

Transport Temperature Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) and unacceptable transport temperature(s) are also included. The preferred transport temperature is listed first, followed by the alternate acceptable temperature (if appropriate) and lastly, the unacceptable transport temperature(s).

Frozen\Ambient OK\Refrig OK

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

Hemolysis:                                          NA

Lipemia:                                               NA

Icteric: