Are You Making These Common Blood Sugar Test Mistakes?
Managing your blood sugar levels is crucial, especially if you have diabetes or pre-diabetes. Regular blood sugar testing is the cornerstone of effective management, allowing you to understand how your body responds to food, exercise, stress, and medication. However, even with the best intentions, many people unknowingly make mistakes that can lead to inaccurate readings and potentially compromise their health. Let’s dive into some of the most common blood sugar test mistakes and how to avoid them.
1. Not Washing Your Hands Properly
One of the most frequent and easily avoidable mistakes is failing to wash your hands thoroughly before testing. Even minuscule traces of food, lotion, or other substances on your fingers can contaminate the sample and significantly skew the results.
- The Correct Approach: Wash your hands with warm water and soap. Dry them completely with a clean towel. Avoid using alcohol wipes unless soap and water are unavailable, as residual alcohol can also affect readings.
2. Using Expired or Damaged Test Strips

Test strips are sensitive and can degrade over time or when exposed to humidity or extreme temperatures. Using expired or damaged test strips can result in inaccurate or unreliable readings, defeating the purpose of the test.
- The Correct Approach: Always check the expiration date on your test strip vial before each use. Store your test strips in a cool, dry place, away from direct sunlight and humidity. Discard the entire vial immediately after the expiration date, regardless of how many strips remain. Never use strips that appear damaged or discolored.
3. Inadequate Blood Sample
A common frustration is not obtaining a large enough blood sample. This can lead to error messages on the glucometer or require you to re-prick your finger, causing unnecessary discomfort. Simple Exercises Proven To Help Lower Your A1C Blood Sugar
- The Correct Approach: Ensure your hands are warm, as warmth promotes blood flow. Before pricking, gently massage your finger toward the fingertip. Use the side of your fingertip for pricking, as it has fewer nerve endings and is less sensitive. Apply gentle pressure after pricking to encourage a sufficient blood drop. Modern meters often require very small samples, so avoid squeezing your finger excessively, as this can dilute the sample with tissue fluid, resulting in an inaccurate result.
4. Improper Storage and Maintenance of Your Glucometer
Your glucometer is a precision instrument and needs to be stored and maintained properly to ensure accurate readings. Exposure to extreme temperatures, humidity, or dust can damage the device and affect its performance.
- The Correct Approach: Store your glucometer in a clean, dry place at room temperature, as specified by the manufacturer. Clean it regularly with a soft, dry cloth. Avoid getting the meter wet. Replace the batteries as needed, following the manufacturer’s instructions. Consider having your glucometer's accuracy checked periodically by a healthcare professional, or by using a control solution, to ensure it remains reliable.
5. Not Coding Your Glucometer Correctly
Some older glucometers require you to manually enter a code that corresponds to the batch number on the test strip vial. If the code is incorrect, the readings will be inaccurate. While many newer meters automatically code, it's crucial to double-check. Why Does My Blood Sugar Spike After Meals 5 Common Factors
- The Correct Approach: Carefully compare the code on the test strip vial with the code displayed on the glucometer. If they don't match, manually enter the correct code using the meter's buttons. For glucometers with automatic coding, ensure the function is working correctly by referring to the user manual.
6. Ignoring the Effect of Medications
Certain medications, both prescription and over-the-counter, can affect blood sugar levels. Ignoring this factor can lead to misinterpretation of your blood sugar test results.
- The Correct Approach: Inform your doctor about all medications, supplements, and herbal remedies you are taking. Ask how these might affect your blood sugar levels and how to adjust your testing schedule or medication dosages accordingly. Some common medications that affect blood sugar include corticosteroids, diuretics, and certain antidepressants.
7. Not Keeping a Log or Tracking Trends
Simply testing your blood sugar isn't enough. To effectively manage your blood sugar, you need to track your readings and identify trends over time.
- The Correct Approach: Keep a detailed log of your blood sugar readings, noting the date, time, and any relevant factors such as meals, exercise, stress, or medications. Many glucometers have memory functions that allow you to store and review past readings. You can also use a notebook, a spreadsheet, or a blood sugar tracking app on your smartphone. Share this log with your doctor or diabetes educator to help them make informed decisions about your treatment plan.
8. Not Calibrating Your Continuous Glucose Monitor (CGM) Properly
For those using a Continuous Glucose Monitor (CGM), periodic calibrations are essential to maintain accuracy. Failing to calibrate correctly can lead to significant discrepancies between the CGM readings and your actual blood sugar levels.
- The Correct Approach: Follow the manufacturer's instructions for calibrating your CGM. Typically, this involves comparing the CGM reading with a fingerstick blood sugar reading and entering the fingerstick value into the CGM device. Calibrate at the recommended intervals, usually when your blood sugar is stable (not rapidly rising or falling).
Understanding Target Ranges
Knowing your numbers is essential, but understanding what those numbers mean is even more crucial. It is important to know the recommended blood sugar target range. Always consult your doctor to determine blood sugar level.
Here is the common target range suggested by medical professional.
Time | Target Range |
---|---|
Fasting (Before Meal) | 80-130 mg/dL |
Postprandial (1-2 Hours After Meal) | Less than 180 mg/dL |
Taking Control of Your Health
Avoiding these common blood sugar test mistakes is a crucial step toward better diabetes management and overall health. By following the recommended practices, keeping accurate records, and consulting with your healthcare team, you can gain a better understanding of your blood sugar levels and make informed decisions to stay healthy. Remember that regular blood sugar testing is just one component of a comprehensive diabetes management plan that includes diet, exercise, and medication. Is Unexplained Fatigue A Symptom Of Poor Blood Sugar Insulin Response