Pregnancy Test, Serum

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Lab Dept: Hematology Test Name: PREGNANCY TEST, SERUM General Information Lab Order Codes: SEHCG Synonyms: HCG; pregnancy test; human chorionic gonadotropin CPT Codes: 84703 – Gonadotropin, chorionic (hCG); qualitative Test Includes: Qualitative serum pregnancy test reported as positive or negative. Logistics Test Indications: Useful for the qualitative detection of human chorionic gonadotropin (hCG) to detect pregnancy. Lab Testing Sections: Hematology Phone Numbers: MIN Lab: 612-813-6280 STP Lab: 651-220-6550 Test Availability: Daily, 24 hours Turnaround Time: 1 hour Special Instructions: N/A Specimen Specimen Type: Blood Container: Red top tube Draw Volume: 2 mL (Minimum: 1.5 mL) blood Processed Volume: Minimum: 0.5 mL serum Collection: Routine venipuncture Special Processing: Lab staff: Centrifuge specimen, remove serum aliquot into a screw- capped plastic vial. Store at refrigerated temperatures. Patient Preparation: None Sample Rejection: Unlabeled or mislabeled specimen Interpretive Reference Range: Negative (reported as positive or negative). Specimens containing as low a level as 25 mIU/mL hCG will yield positive results when tested with Quick Vue One-Step hCG Combo Test®. In normal pregnancy, hCG can be detected as early as 6 days following conception with concentrations doubling every 32 to 48 hours, peaking in excess of 100,000 mIU/mL in approximately 10 to 12 weeks. Levels of 25 mIU/mL hCG are reportedly present in urine and serum as early as 2 to 3 days before expected menses. Serum hCG is rapidly cleared into the urine and the concentration of hCG in serum is approximately equal to the concentration in urine. Critical Values: N/A Limitations: Some instances of a positive urine and negative serum test occur. This is due to hCG breakdown products present in the urine. Repeat the test a week later. Methodology: Monoclonal Antibody, Quick Vue One-Step hCG Combo Test® Contraindications: This test should not be used for tumor markers, order HCG, Beta subunit. References: Quidel Quick Vue One-Step hCG Combo Test Kit Package Insert (2002) .

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