Self-Monitoring And Administration Devices - NAPLEX

1. Which hematocrit-related condition can cause inaccurate SMBG readings?

   Extremes of hematocrit (anemia or polycythemia). High or low hematocrit alters blood viscosity, interfering with the meter's enzymatic reaction and glucose detection.

2. What is the correct order of steps for a fingerstick SMBG test?

   Clean/dry site → lance → apply blood to strip → read result. This sequence ensures hygienic sampling, proper blood application, and accurate meter interpretation for reliable results.

3. What is the standard priming instruction before using an insulin pen for a dose?

   Prime with $2$ units (or per product labeling) until a drop appears. Priming expels air bubbles and ensures the needle is clear, guaranteeing full and accurate dose delivery.

4. Which storage condition is most important to prevent glucose test strip degradation?

   Keep strips sealed, dry, and at room temperature. These conditions protect enzymes on strips from moisture, heat, and air, maintaining their reactivity and accuracy.

5. What is the usual capillary blood sampling site recommended for routine SMBG?

   Lateral side of the fingertip. This site minimizes pain and callus formation while providing adequate blood flow for accurate sampling.

6. What is the key counseling point about acetaminophen and some CGM systems?

   Acetaminophen may falsely elevate readings on some CGMs. Acetaminophen interferes with the sensor's electrochemical signal in certain systems, leading to overestimated glucose levels.

7. What is the primary benefit of CGM compared with SMBG for many patients?

   Trend data and hypoglycemia alerts with time-in-range assessment. CGM provides continuous insights and proactive alerts, enabling better glycemic control through time-in-range metrics.

8. Which instruction best reduces pain and tissue damage during fingerstick testing?

   Use a new lancet and avoid the fingertip pad/center. Fresh lancets prevent infection and dullness, while avoiding the pad reduces nerve irritation and long-term damage.

9. What does MDI stand for in insulin administration and self-management?

   Multiple daily injections. This abbreviation refers to a regimen involving several insulin doses per day to mimic physiologic insulin secretion.

10. What is the correct action if insulin is injected into an area of lipohypertrophy?

    Avoid that area; absorption is unpredictable and dosing may be unreliable. Lipohypertrophied tissue alters insulin pharmacokinetics, so avoidance ensures predictable dosing and glycemic response.

11. What is the correct counseling point about rotating insulin injection sites?

    Rotate within the same anatomic area to reduce lipohypertrophy. Systematic rotation within areas maintains consistent absorption and prevents tissue buildup from repeated trauma.

12. What does "time in range" typically refer to for most nonpregnant adults using CGM?

    Percent of time glucose is $70$–$180$ mg/dL. This metric quantifies glycemic stability within the target range, guiding therapy adjustments for optimal diabetes control.

13. Which insulin device uses units dialed on a pen and delivered via a disposable needle?

    Insulin pen. Pens allow precise dosing via a dial mechanism, improving convenience and accuracy over traditional syringes.

14. What is the main physiologic reason CGM values can differ from fingerstick glucose?

    CGM measures interstitial glucose with a time lag vs blood glucose. Interstitial fluid glucose trails blood glucose by 5-15 minutes due to diffusion time, causing temporary discrepancies.

15. What does SMBG stand for in diabetes self-monitoring and administration devices?

    Self-monitoring of blood glucose. This acronym denotes the patient-led process of regularly assessing blood sugar levels to manage diabetes effectively.

16. What does CGM stand for in diabetes monitoring devices?

    Continuous glucose monitoring. This term describes real-time tracking of glucose levels using subcutaneous sensors for ongoing diabetes management.

17. What is the most common preanalytical cause of falsely high SMBG readings?

    Glucose contamination on fingers (not washing hands). Residual glucose from food or products on unwashed hands can contaminate the sample, inflating the measured value.

18. Identify the most common local complication from repeated insulin injections in one spot.

    Lipohypertrophy. Repeated injections cause fat tissue hypertrophy, leading to hardened areas that impair insulin absorption.

19. What is the key counseling point about mixing insulin in a syringe (when applicable)?

    Draw up clear (regular) before cloudy (NPH): "clear to cloudy". This order prevents NPH particles from contaminating the clear insulin vial, preserving purity and stability.

20. Which injection sites are preferred for fastest and most consistent insulin absorption?

    Abdomen (avoid $2$ inches around the navel). The abdomen offers rapid absorption due to high vascularity, but avoiding the navel prevents inconsistent uptake from scar tissue.

21. What is the primary purpose of running a glucose meter control solution test?

    Verify meter and strip performance within control range. Control solutions confirm the meter's calibration and strip functionality, ensuring readings fall within expected ranges.

22. Which CGM trend indicator should prompt confirmatory SMBG before dosing insulin?

    Rapidly rising or falling trend arrows with symptoms or alerts. Trend arrows indicate dynamic changes where CGM lag may amplify errors, necessitating blood confirmation for safe dosing.

23. Identify when control solution testing is most appropriate for SMBG supplies.

    New meter/strips, after drops, or when results do not match symptoms. Testing at these times detects potential malfunctions or degradation, safeguarding the reliability of glucose measurements.

24. What is the best immediate corrective action if hands are visibly soiled before SMBG?

    Wash with soap and water and dry completely. Proper cleaning removes contaminants that could skew glucose readings, ensuring sample integrity for accurate testing.

25. Which patient factor commonly makes alternate-site glucose testing unreliable?

    Rapidly changing glucose (post-meal, post-exercise, or after insulin). Alternate sites like the forearm or thigh exhibit a lag in glucose changes, leading to discrepancies during rapid fluctuations.

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