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Test ID RISAP Risankizumab Quantitation with Antibodies, Serum


Specimen Required


Patient Preparation: For 12 hours before specimen collection, patient should not take multivitamins or dietary supplements (eg, hair, skin, and nail supplements) containing biotin (vitamin B7).

Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1.5 mL

Collection Instructions:

1. Draw blood immediately before next scheduled dose (trough specimen).

2. Within 2 hours of collection, centrifuge, and aliquot serum into a plastic vial.


Reporting Name

Risankizumab QN with Antibodies, S

Specimen Type

Serum

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 28 days
  Frozen  28 days

Report Available

2 to 9 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

LOINC Code Information

Test ID Test Order Name Order LOINC Value
RISAP Risankizumab QN with Antibodies, S 105194-5

 

Result ID Test Result Name Result LOINC Value
621304 Risankizumab, S 105041-8
621769 Risankizumab Ab, S 105195-2
621812 RISAB Interpretation 59462-2

Forms

If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

-Gastroenterology and Hepatology Test Request (T728)

-Therapeutics Test Request (T831)

Useful For

Evaluation of patients with limited primary (initial) response to or secondary loss of response to risankizumab

Day(s) Performed

Weekly

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

80299

82397

Specimen Minimum Volume

0.75 mL

Reference Values

RISANKIZUMAB QUANTITATION:

Risankizumab lower limit of quantitation =1.0 mcg/mL

 

RISANKIZUMAB ANTIBODIES:

Antibodies to risankizumab: <20.0 ng/mL

Method Name

RISA: Liquid Chromatography Mass Spectrometry (LC-MS)

RISAB: Electrochemiluminescent-Bridging Immunoassay (ECLIA)

Profile Information

Test ID Reporting Name Available Separately Always Performed
RISA Risankizumab, S Yes Yes
RISAB Risankizumab Ab, S No Yes