Beta-hCG, Quantitative (Pregnancy)
Also known as: QNT BHCG
Use
The Beta-hCG, Quantitative test is used to measure the level of human chorionic gonadotropin (hCG) hormone in the blood, which is indicative of pregnancy. Elevated hCG levels in a female can confirm pregnancy but can also be associated with other conditions. Thus, this test is primarily used for pregnancy determination and monitoring.
Special Instructions
For optimal results, serum should be separated from cells as soon as possible, ideally within 2 hours of collection, to prevent degradation of the Beta-hCG hormone, ensuring accurate quantification.
Limitations
The test is specifically approved for serum and plasma samples collected in serum separator tubes or EDTA/lithium heparin tubes. It cannot be used with cerebrospinal fluid (CSF), as it does not provide reliable results for CSF samples. The environment and conditions during sample transport and processing can affect the stability of hCG measurements.
New York Approved
Methodology
Immunoassay (ECLIA)
Biomarkers
LOINC Codes
- 21198-7
Result Turnaround Time
1 day
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.4 mL
Container
Serum separator tube. Also acceptable: Lavender (K2EDTA or K3EDTA), pink (K2EDTA), or green (lithium heparin).
Collection Instructions
Allow specimen to clot completely at room temperature. Separate serum from cells ASAP or within 2 hours of collection.
Causes for Rejection
CSF specimens or specimens left to clot at 2-8 degrees C.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 5 days |
| Refrigerated | 2 weeks |
| Frozen | 1 year |