Use your meter’s own instructions and your diabetes care plan. An unexpected result can require both a technique check and clinical action; do not dismiss symptoms or delay treatment while troubleshooting a device.
Your care plan comes before troubleshooting
If you feel unwell or a reading meets an action threshold in your care plan, follow that plan and contact the appropriate healthcare service. A checklist cannot establish that a reading is false. If you are seriously unwell, seek urgent help.
FDA guidance emphasizes using the meter correctly and discussing problems with your healthcare professional. Different meters have different instructions, sample requirements and error messages. Keep the manual for the exact model, rather than relying on a generic video.
Check the system, not just the screen
Confirm that the strips are intended for your exact meter, are within their usable dates and have been stored according to the instructions. FDA advises using new, unopened strips rather than buying previously owned supplies. Check both the printed expiry and any after-opening limit in the instructions.
Follow the meter instructions for washing and drying your hands, applying a blood sample and dealing with an insufficient sample. Do not add more blood or reuse a strip unless the specific instructions permit the action. Record an error code as an error, not a glucose value.
| Item | Useful detail |
|---|---|
| Meter | Exact model and displayed unit |
| Strips | Compatible product, expiry and opening date |
| Storage | Any known heat, moisture or container issue |
| Result | Original value or error code with time |
| Technique | What happened during this test |
| Symptoms | How you feel and action already taken |
Understand what control solution checks
FDA describes control solution as a way to check the meter and strips working together. Follow your manufacturer’s process and its specified control range. The expected range is not your personal blood-glucose target. A control result is not a measurement of your blood glucose.
If the control result is outside the expected range, follow the troubleshooting instructions and contact the manufacturer or care team as appropriate. Do not apply a mathematical correction to later blood readings based on the difference from the control range.
Illustrative support note: “Meter model and strip product attached; control check outside the printed range; strip opening date unknown; I have not treated the control number as a personal glucose result.” This documents a device concern without declaring the meter safe to use.
Preserve the result and the follow-up
Keep the unexpected value, any repeat made according to instructions, and the reason for repeating. Do not overwrite the first result merely because a second seems more plausible. Note which action your healthcare professional or manufacturer recommended.
The glucose appointment notes and units-and-meals guide help preserve context. Blood Glucose Tracker+ organizes entered readings; it does not validate strips, measure glucose by itself or replace your action plan. Keep control checks clearly separated from personal glucose readings.
Sources & checks
- FDA: Blood glucose monitoring devices ↗
Meter/strip system and control-solution range.
- FDA: Safely use glucose meters and test strips ↗
New unopened strips, compatibility and control checks.
- FDA: Getting the most out of your meter ↗
Technique and device-specific directions.
- Current App Store listing: Blood Glucose Tracker+ ↗
Public US listing checked September 30; recording or sound features only, not evidence of health benefit.
Checked against these sources on 2026-09-30. Examples and worksheets are original illustrations, not real patient histories or clinical validation. This is educational content, not individual medical advice or a clinician-reviewed treatment plan.
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