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Test Code LAB2413 Beta-Human Chorionic Gonadotropin, Quantitative, Spinal Fluid

Additional Codes

HCG, CSF

Reporting Name

Chorionic Gonad Beta-Subunit QN,CSF
Seattle Children's Hospital Note:

Clinical System Name: CSF Beta HCG

Useful For

Aiding in the diagnosis of brain metastases of testicular cancer or extragonadal intracerebral germ cell tumors

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

CSF


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).

Container/Tube: Sterile vial

Specimen Volume: 1 mL

Collection Instructions: Submit specimen from collection vial number 1.


Specimen Minimum Volume

0.75 mL

Specimen Stability Information

Specimen Type Temperature Time
CSF Refrigerated (preferred) 28 days
  Ambient  14 days
  Frozen  14 days

Reference Values

<1.0 IU/L

Day(s) Performed

Monday through Saturday

Seattle Children's Hospital Note:

TAT: 3 - 5 d

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

84702

LOINC Code Information

Test ID Test Order Name Order LOINC Value
BHSF Chorionic Gonad Beta-Subunit QN,CSF 14041-8

 

Result ID Test Result Name Result LOINC Value
BHSF Chorionic Gonad Beta-Subunit QN,CSF 14041-8

Method Description

The Roche human chorionic gonadotropin (hCG) assay is a 2-site immunometric sandwich assay using electrochemiluminescence detection. Patient specimen, biotinylated monoclonal hCG-specific antibody, and monoclonal hCG-specific antibody labeled with a ruthenium react to form a complex. Streptavidin-coated microparticles act as the solid phase to which the complex becomes bound. Voltage is applied to the electrode inducing a chemiluminescent emission from the ruthenium, which is then measured against a calibration curve to determine the amount of hCG in the patient specimen.(Package insert: Elecsys HCG+B. Roche Diagnostics; V1.0. 05/2024)

Report Available

1 to 3 days

Reject Due To

Hemolysis Reject

Method Name

Electrochemiluminescent Immunoassay (ECLIA)

Forms

If not ordering electronically, complete, print, and send an Oncology Test Request (T729) with the specimen.