Practice Test Geeks(CLIA) Clinical Laboratory Improvement Amendments Certification Practice Test
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Testing Procedures & Method Validation Flashcards

7 cards from real CLIA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Testing Procedures & Method Validation flashcards as text

  1. Which of the following best defines the 'analytical measurement range' (AMR) of a quantitative laboratory test?

    Answer: The span of analyte concentrations over which the method produces accurate, linear results without dilution or concentration

    The AMR is the range of concentrations over which a method can directly report accurate results without sample manipulation such as dilution.

  2. A new immunoassay for thyroid-stimulating hormone (TSH) shows excellent precision but consistently underestimates TSH in patients with high heterophile antibody titers. This is an example of:

    Answer: Endogenous interference

    Heterophile antibodies are endogenous interferents that can disrupt immunoassay signal, leading to falsely low or high results despite good precision.

  3. Under CLIA, which of the following personnel may NOT serve as the technical consultant for a moderate-complexity laboratory?

    Answer: A high school graduate with 5 years of bench experience

    CLIA requires a technical consultant for moderate-complexity labs to have at minimum an associate degree in laboratory science or equivalent, not just bench experience.

  4. When a manufacturer's package insert claims a clinical sensitivity of 95% for a disease marker, this means:

    Answer: 95% of individuals with the disease test positive

    Clinical sensitivity is the proportion of truly diseased individuals who test positive (true positive rate), not to be confused with analytical sensitivity.

  5. During sigma metric analysis for a glucose method, a laboratory calculates: TEa = 10%, bias = 2%, CV = 2%. What is the sigma value?

    Answer: 4

    Sigma = (TEa − |bias|) / CV = (10 − 2) / 2 = 4; a sigma of 4 indicates good method performance.

  6. Which document provides the minimum frequency and type of QC materials that must be run for a non-waived quantitative test under CLIA?

    Answer: CLIA 42 CFR Part 493 and CMS guidelines

    CLIA regulations at 42 CFR Part 493 establish the minimum QC requirements, though accreditation bodies like CAP may impose additional standards.

  7. A laboratory is evaluating a new urine dipstick analyzer (waived test). Under CLIA, which performance verification step is required before reporting patient results?

    Answer: Following the manufacturer's instructions and verifying the test system works as expected

    For waived tests, CLIA only requires that laboratories follow manufacturer instructions and confirm the system is functioning correctly — full validation is not required.