IgG/Albumin Ratios, Blood (Sendout)

Interpretation

Method

Nephelometry

Reference Range

See individual components

Ordering & Collection

Specimen Type

Blood

Collection

3 mL blood in RED TOP tube or GOLD SST

Note: This test also requires CSF collected within 7 days of blood collection. See IgG/Albumin Ratios, CSF/Blood (Sendout) [RCSRAT].

Handling Instructions

Outside Laboratories:

• This test requires both CSF and serum samples obtained within 7 days of each other.
• CSF: Store and transport CSF sample refrigerated. See IgG/Albumin Ratios, CSF/Blood (Sendout) [RCSRAT].
• Blood: Centrifuge sample and aliquot serum to a separate plastic vial within 2 hours of collection. Refrigerate serum while awaiting shipment.
• Indicate "CSF" or "serum" on the sample labels.
• Send serum and CSF samples in the same package to avoid delays. Transport with a cold pack.

Stability (Serum): Refrigerated (preferred): 28 days; Frozen: 28 days; Ambient: 14 days.

Reject Due To: Gross lipemia. Gross hemolysis or gross icterus are acceptable.

Quantity

Requested: 1 mL serum
Minimum: 0.5 mL serum

Processing

Receiving Instructions

Centrifuge sample and aliquot serum into two separate plastic vials within 2 hours of collection. Refrigerate serum aliquots.

This test must be ordered with IgG/Albumin Ratios, CSF/Blood (Sendout) [RCSRAT]. If serum and CSF samples arrive together at the lab, an HC1 task is not needed. Forward both samples to the Sendouts bench. If a blood sample is received without CSF:

1. Review open HC1 Tasks and/or the patient's record in Sunquest Inquiry to determine if the RCSRAT sample was previously received in lab. If so, receive the XSFIGS order and deliver all samples to Sendouts.
2. If serum is received without an existing RCSRAT order, create a task in HC1 to hold the processed serum sample (refrigerated) while waiting for the CSF. Do not deliver to Sendouts until both samples are received.
3. Contact the provider or client as needed if the other sample is not received in a timely manner.

Sendouts:

• Wait for both CSF (RCSRAT) and serum (XSFIGS) samples before batching the order across the interface.
• Write the sample type ("CSF" or "serum") on the sample labels.
• Rubberband the serum and CSF samples together.
• Batch the RCSRAT order outbound over the interface. Track both CIDs to USENT.
  • The XSFIGS code is for serum collection only, and will not batch separately.

Stability (Serum): Refrigerated (preferred): 28 days; Frozen: 28 days; Ambient: 14 days.

Reject Due To: Gross lipemia. Gross hemolysis or gross icterus are acceptable.

Misc Sendout

Performance

Lab Department

Sendouts Mayo Lab (RF)(MARF)

Frequency

Performed: Monday through Friday. Report Available: 1-2 days from sample receipt at Mayo Clinic Lab.

Available STAT?

No

Performing Location(s)

Sendout	Mayo Clinic Laboratories 800-533-1710 200 First Street Southwest Rochester, MN 55901
Sendout	Mayo Clinic Laboratories (Superior Drive) 800-533-1710 3050 Superior Drive NW Rochester, MN 55901

Billing & Coding

LOINC

30896-5

Interfaced Order Code

UOW5621