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Quantitative BHCG
Test CodeLAB143
Alias/See Also
BHCG; HCGQ
CPT Codes
84702
Preferred Specimen
Heparinized plasma (preferred) or serum (SST). Centrifuge within 2 hours of collection
Refrigerate within 8 hours.
Refrigerate within 8 hours.
Instructions
Routine venipuncture. Collect one 4.5ml light green top (heparin) tube or one 5ml Red/gold top serum separator tube.
Transport Temperature
Send Refrigerated (2-8C)
Specimen Stability
Stable refrigerated for 3 days.
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Failure to follow proper collection and handling procedures
Methodology
Immunometric: The amount of HRP conjugate bound is directly proportional to the concentration of hCG present.
Setup Schedule
Daily/STAT
Report Available
Within 12 hours STAT: witihin 3 hours
Reference Range
"Gestational age:
• 0-2 weeks: 5-50 mIU/mL
• 1-2 weeks: 50-500 mIU/mL
• 2-3 weeks: 100-500 mIU/mL
• 3-4 weeks: 500-1000 mIU/mL
• 5-6 weeks: 10,000-100,000 mIU/mL
• 6-8 weeks: 15,000-200,000 mIU/mL
• 2-3 months: 10,000-100,000 mIU/mL
• 2nd trimester: 75,000-97,000 mIU/mL
• 3rd trimester: 3000-27,000 mIU/mL"
• 0-2 weeks: 5-50 mIU/mL
• 1-2 weeks: 50-500 mIU/mL
• 2-3 weeks: 100-500 mIU/mL
• 3-4 weeks: 500-1000 mIU/mL
• 5-6 weeks: 10,000-100,000 mIU/mL
• 6-8 weeks: 15,000-200,000 mIU/mL
• 2-3 months: 10,000-100,000 mIU/mL
• 2nd trimester: 75,000-97,000 mIU/mL
• 3rd trimester: 3000-27,000 mIU/mL"
Clinical Significance
Human chorionic gonadotropin (hCG) hormone is an excellent marker for pregnancy. Healthy, nonpregnant individuals have low (<5 million int. units/mL) to undetectable hCG in serum. During pregnancy, hCG concentrations increase as noted above and then show a gradual decrease after the first trimester. Unusually low or rapidly declining levels may indicate an abnormal condition such as an ectopic pregnancy or impending spontaneous abortion.
Performing Laboratory
CH CHOMP HOSPITAL LAB (831-625-4811): CH CHEMISTRY
