Test Code LAB437 Chorionic Gonadotropin (hCG), Qualitative, Urine
Performing Laboratory
Barnes-Jewish Hospital Laboratory
Methodology
Immunochromatographic
General Information:
Qualitative test—for use on specimens from females only. Specimens from males will not be analyzed. For males, see LAB143 Chorionic Gonadotropin (hCG), Quantitative, Serum.
Note: In rare instances of trophoblastic disease, urine hCG concentrations may be high enough to produce a false-negative value due to a “high-dose hook effect.” Due to observation of such samples it is determined that hCG concentrations >1,000,000 mIUnits/mL will cause false-negative values. If a result is not consistent with clinical impression or other data, the sample should be repeated using a 1:10 dilution which will eliminate the “high-dose hook effect.”
Literature Reference:
Package insert: OSOM Ultra hCG Combo Kit by Sekisui Diagnostic
Specimen Requirements
Specimen Type: Urine, random
Container/Tube: Yellow Urine Collection tube
Specimen Volume: 5 mL
Collection Instructions: See Urine Collection in Special Instructions for collection containers.
Note: For early determinations of pregnancy, the first-morning specimen of urine is recommended since it usually contains the highest concentration of hCG. However, any urine specimen is suitable for testing.
Day(s) Test Set Up
Daily testing upon receipt
Turnaround Time:
STAT: 1 hour after receipt in laboratory
Routine: 2 to 4 hours after receipt in laboratory
Test Classification and CPT Coding
81025
Reference Values
Significant value: positive
Sensitivity: 20 mIUnits/mL
Note: Concentrations of hCG may be sufficiently high to be detected on or before the expected menses.
Literature Reference:
Ashwood ER, Evaluation of health and maturation of the unborn. Clin Chem 1992;38:1523-9.
Specimen Transport Temperature
Ambient
Additional Information
For BJH Laboratory Use Only
Analyte Stability:
See Analyte Stability Chart in Special Instructions.
Laboratory Processing Instructions:
Test performed in BJH Core Lab. Deliver to the Urinalysis workstation. Completed specimen is stored refrigerated for 3 days.
Special Instructions
LOINC Code Information
Name | LOINC Code |
Chorionic Gonadotropin, Qualitative, Urine | 2106-3 |