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Test Name:
Biotinidase, Serum (with paired normal control)
- SBMF No:
45525 - Performance Lab Name:
ARUP Laboratories - Test Mnemonic:
BTD ENZ - ABN:
Not required - CPT Code:
82261 - LOINC Code:
1982-8; 19146-0 - Ref Lab Test No:
0093362 - Spec Type:
Serum from patient AND serum from healthy, unrelated individual (normal control) - Spec Container:
Red top (serum) or gold top (SST) tube - Pref Vol:
2.0 mL from patient, AND
2.0 mL from normal control - Min Vol:
0.2 mL from patient, AND
0.2 mL from normal control - Fasting:
No - Patient Prep:
Form required: "Patient History for Biotinidase Deficiency Testing" - Spec Collect:
Routine venipuncture
Within 30 minutes of patient sample, collect normal control sample from a healthy, unrelated individual - Spec Process:
Clot 30 minutes
Promptly centrifuge 15 minutes
Immediately transfer serum to separate plastic tube and freeze
Label the control tube as "control for (patient name)" - Spec Store Transport:
Frozen
Transport patient and control samples together - Spec Stability:
After separation from cells:
1 hour room temperature (20-30°C)
1 hour refrigerated (2-8°C)
1 month frozen (-20°C) – Do not use frost-free units that undergo repeated freeze/thaw cycles - Spec Reject:
Room temperature or refrigerated sample
Sample subject to more than one freeze/thaw cycle - Spec Remarks:
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Separate serum from cells and freeze ASAP for both patient and control samples - Methodology:
Spectrophotometry - Reference Range:
3.5-13.8 U/L - Day Run:
Tue, Fri - Time Reported:
2-7 days - Test Type:
CHEMISTRY
