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BCLT 4-4 hCG Tests
Question | Answer |
---|---|
hCG | pregnancy hormone, prod by placenta, detectable 1 week after implantation |
enzyme immunoassay - new method aka | chromatographic immunoassay |
qualitative test | urine |
quantitative test | serum |
CLIA waived only with | urine |
chromatographic immunoassay principle | anti hCG antibodies >> attach color particles >> coat membrane strip >> complex (color change) or no complex forms |
1st morning urine best b/c | most concentrated |
test asap or fridge >> | up to 24-48 hours |
read results in | 5 min exactly, on time |
who reports results | RN or doc, not phleb! |
qualitative enzyme immunoassay >> followed up by | quantitative serum hCG |
other conditions cause pos hCG test results | tumors: breast, ovarian, testicular; trophoblastic disease |
pos hCG urine or serum test >> not to used to diagnose preg unless 1 and 2 | 1. other clinical findings support 2. other conditions have been ruled out |