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Blood Glucose Monitoring Flashcards

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

Read the first 7 Blood Glucose Monitoring flashcards as text
  1. A patient's CGM shows a rapid rate-of-change arrow pointing straight down (>-3 mg/dL/min). What is the most appropriate immediate action?

    Answer: Recheck with fingerstick and treat hypoglycemia proactively

    A rapid downward trend indicates fast-falling glucose requiring fingerstick confirmation and proactive hypoglycemia treatment before symptoms develop.

  2. Which factor most commonly causes falsely elevated SMBG readings in patients using older glucose meter technology?

    Answer: Maltose or xylose interference with glucose oxidase strips

    Maltose (found in icodextrin peritoneal dialysis solutions) and xylose can cause falsely elevated readings with glucose oxidase-based test strips.

  3. For a patient with T1D using a hybrid closed-loop system, when should fingerstick BG be used instead of relying solely on CGM values?

    Answer: When symptoms don't match CGM reading or before treating severe hypoglycemia

    Fingerstick verification is essential when symptoms are discordant with CGM values or before treating severe hypoglycemia to ensure clinical safety.

  4. What is the recommended minimum number of daily SMBG checks for a patient with T1D using multiple daily injections (MDI) who is NOT using CGM?

    Answer: 6–8 times per day

    ADA standards recommend at least 6–8 SMBG checks daily for T1D patients on MDI to guide insulin dosing decisions at meals, bedtime, and overnight.

  5. A patient's CGM time-in-range (TIR) is 58% with 12% time below range (TBR). Which adjustment should be prioritized?

    Answer: Address hypoglycemia (TBR) before attempting to improve TIR

    Hypoglycemia (TBR >4%) must be addressed first as it poses immediate safety risk and may paradoxically be worsening TIR through hypoglycemia-driven rebound hyperglycemia.

  6. Which CGM metric best captures glycemic variability independent of mean glucose level?

    Answer: Coefficient of Variation (CV)

    Coefficient of Variation (CV) expresses standard deviation as a percentage of mean glucose, allowing comparison of variability across different mean glucose levels.

  7. A patient reports their CGM readings are consistently 25–30 mg/dL higher than simultaneous fingerstick values. What is the most likely explanation?

    Answer: Interstitial-to-blood glucose lag during rapidly rising glucose

    CGM measures interstitial glucose, which lags behind blood glucose by 5–15 minutes during rapid rises, causing CGM to read higher when glucose is actively rising.