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What's the reason why blood glucose meters usually measure too high
The high measurement of blood glucose meters is usually caused by problems with test strips, insufficient or improper blood collection methods, instrument calibration, blood contamination, self factors, and other reasons.
1. Test paper issue
Expired, damp or improperly stored test strips can cause changes in their chemical activity, affecting the accuracy of their reaction with glucose in the blood and resulting in higher measurement results. For example, if the test paper is exposed to a humid environment for a long time, it is prone to failure.
2. Insufficient blood collection or improper method
When collecting blood, if the blood volume is insufficient, the instrument may not be able to accurately read the blood glucose level, and may default to supplementing the value, resulting in higher results; If the fingers are excessively squeezed, causing tissue fluid to mix into the blood, it will also interfere with the measurement and make the values inaccurate.
3. The instrument is not calibrated
Long term use or collision, falling, etc. of the blood glucose meter may result in measurement deviation. If the instrument is not calibrated regularly according to the instructions, the measurement results may be higher.
4. Blood contamination
Unclean blood collection areas with residual alcohol, food, etc., or using contaminated cotton swabs to wipe the blood collection area, can contaminate the blood and affect blood glucose measurement results, leading to high values.
5. Self factors
The patient is in a state of stress, such as infection, trauma, surgery, emotional excitement, etc. The body will secrete some hormones to raise blood sugar. At this time, when measured with a blood glucose meter, the result will also be higher than usual.
If it is found that the measurement results of the blood glucose meter are often high and do not match one's own symptoms, or if there is suspicion of accuracy problems with the blood glucose meter, one should go to the hospital in a timely manner and take venous blood for blood glucose testing to determine the true blood glucose level and avoid delaying the condition or taking medication incorrectly due to inaccurate blood glucose measurement.
The reason why the blood glucose meter does not display values
The reasons why the blood glucose meter does not display values include the possibility of the battery running out, the possibility of the memory battery running out, the possibility of the blood glucose meter being infected by viruses or malicious software, the possibility of damage to the testing area, the possibility of expired test strips, incorrect operation, and possible problems with the blood glucose meter. The specific reasons are as follows:
1. The battery may be depleted: The blood glucose meter may not display a value due to insufficient battery power. You can try replacing the battery. Generally speaking, the blood glucose meter uses two No. 7 batteries.
2. Memory battery may run out: Memory batteries are used to read blood glucose test results. If the memory battery runs out of battery, the blood glucose meter will not display the value.
3. The blood glucose meter may be infected by viruses or malicious software: If the blood glucose meter is infected by viruses or malicious software, it may have problems and not display values. In this case, it is necessary to use antivirus or anti malware programs to check the blood glucose meter and ensure that there are no issues.
4. Testing area may be damaged: If the testing area is damaged, the blood glucose meter may not be able to read the values correctly. Ensure that the testing area is not damaged.
5. Test strips may expire: If the test strips expire, the blood glucose meter may not be able to read the values correctly. Please pay attention to the expiration date of the test paper.
6. Incorrect operation: If the operation is incorrect, the blood glucose meter may also fail to display values properly. You can refer to the user manual of the blood glucose meter to operate it correctly.
7. There may be a problem with the blood glucose meter: If all possible reasons have been ruled out, it may be necessary to consider whether there is a problem with the blood glucose meter. You may need to contact the manufacturer or distributor for assistance.
The above are just some common reasons, and the failure of the blood glucose meter to display values may be caused by many different reasons, which need to be investigated one by one.
What are the reasons for large errors in blood glucose meters
The main reasons for large errors in blood glucose meters include improper operation, improper storage of test strips, uncalibrated blood glucose meters, abnormal blood samples, and environmental interference.
1. Improper operation
Failure to thoroughly clean residual sugar or alcohol on the fingers during blood collection, squeezing the fingertips causing tissue fluid to mix into the blood, or insufficient blood collection to fully cover the reaction area of the test strip, can all affect the test results. It is recommended to wash your hands with warm water and let them air dry naturally. Choose to collect blood from both sides of your fingertips to avoid excessive pressure.
2. Improper storage of test strips
Moisture, expiration, or exposure to high temperatures can cause a decrease in oxidase activity in test strips. Failure to close the bottle cap of the test paper in a timely manner or store it in a damp place such as a bathroom may cause the test paper to become damp and ineffective. The test paper should be sealed and stored in a cool and dry place, and the expiration date should be checked before use.
3. The blood glucose meter is not calibrated
The electronic components of the blood glucose meter may age after prolonged use, and regular calibration with standard calibration solution is required. The codes of different batch numbers of test strips need to be matched with the instrument. Failure to adjust the codes in a timely manner may result in system errors. It is recommended to recalibrate the instrument every time the test strip batch number is changed.
4. Abnormal blood sample
Severe anemia patients with insufficient hemoglobin may overestimate blood glucose levels, while changes in blood viscosity in patients with dehydration or hyperlipidemia can affect the accuracy of testing. Taking interfering substances such as vitamin C or excessive uric acid may also lead to false results, and should be combined with venous blood re examination.
5. Environmental interference
The high-altitude low oxygen environment or extreme temperature and humidity can affect enzyme reaction efficiency, and the magnetic field generated by electromagnetic equipment may interfere with instrument electronic signals. During testing, it is advisable to stay away from microwave ovens and other electrical appliances, and maintain the room temperature within the range of 10-40 degrees Celsius.
Daily monitoring requires the selection of quality certified blood glucose meters and regular quality control testing. Check the validity period and code of the test strip before testing, and read the results within 2 minutes after blood collection. If the value fluctuates abnormally, repeat the test. If the difference between fasting and postprandial blood glucose exceeds 3mmol/L, it is recommended to seek medical attention for a recheck of glycated hemoglobin. Maintaining a regular diet and moderate exercise can help reduce the impact of blood sugar fluctuations on testing.
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