Now that many people with diabetes have purchased portable blood glucose meters, what should they focus on when choosing a blood glucose meter? How to use the blood glucose meter correctly? Here, I will give some brief explanations on related issues.
First, what should you pay attention to when purchasing a blood glucose meter?
First of all, you should understand the type of blood glucose meter. The blood glucose meter is divided into two major categories: photochemical method and electrode method according to the working principle. The photochemical blood glucose meter has good stability and accuracy; the electrode method blood glucose meter has different internal electrodes because of different electrode materials, and the price, accuracy and stability are quite different. Fast (several seconds). Second, pay attention to the price/performance ratio, including the price of the test paper. Again, attention should be paid to after-sales service. Finally, if you buy a blood glucose meter, you should read the instruction manual carefully, pay attention to the characteristics and special requirements of the instrument. If you have any questions during the test, you should communicate with the professional in time.
Second, how to save blood glucose test strips?
Blood glucose test strips are required to be placed in a dry, 10 ° C ~ 40 ° C environment. Do not put it in the bathroom or kitchen, let alone put it in the refrigerator, these places are extremely vulnerable to moisture. If it has been placed in the refrigerator, the sealed test tube should be warmed up at room temperature until it reaches room temperature. Do not remove the test paper before the test tube reaches room temperature to avoid condensation on the test tube. Patients living in some relatively humid places (such as the South) should pay attention: each time a test strip is taken out, the test tube should be tightly closed to prevent the test paper from getting wet; open a new test strip and use it within three months; If possible, try to buy a blood glucose test strip with a separate package.
Third, why is the blood sugar value measured by blood and venous blood different? How should we treat it?
The hospital's biochemical test for venous blood glucose has stricter procedures and quality control standards, so the results are relatively accurate. Diagnosis of diabetes is based on venous blood glucose, and blood glucose measured by portable blood glucose meters cannot be used as a basis for diagnosing diabetes. Because the accuracy of the blood glucose meter is affected by temperature, humidity, and its own stability and sensitivity, the measured blood glucose level may be different from the blood plasma value measured by the biochemical analyzer.
Fourth, when measuring blood, do you need to disinfect? ​​How to disinfect?
Prepare the skin of the finger before the test. It is recommended to wash the finger with warm water and soap, or disinfect with an alcohol swab. Both methods are acceptable. The American Diabetes Association recommends washing hands with soap and running water as skin preparation before blood glucose measurement. But no matter which method must be remembered: the finger must take blood in a dry state, that is to say, warm water and soap should be dried after washing. After the alcohol is disinfected, wait for the alcohol to completely evaporate and then puncture with a blood collection pen. Fingers to ensure the accuracy of the measurement.
It should be emphasized that it is not advisable to use an iodine-containing disinfectant (such as iodophor or iodine) to disinfect the skin. The blood glucose monitoring system using glucose oxidase principle (including the electrode method and the photochemical method of the blood glucose meter), the iodine in the iodine and iodophor can react with the enzyme in the blood glucose test paper, causing an error. This is because: the electrode method of the blood glucose meter is when the whole blood drops into the reaction zone of the test strip, the blood sugar in the sample reacts with the chemical substrate (enzyme) to generate a current, and the blood sugar is calculated by detecting the intensity of the current. content. Iodine and the enzyme can also react, thereby interfering with the value of the current, causing a deviation in the blood glucose level. The blood glucose meter of the principle of photochemical method reflects the blood sugar level by detecting the color change of the test strip during the reaction process, and the iodine can interfere with the color change through the above chemical reaction and its own color, thereby affecting the accuracy of the blood sugar level.
5. What problems should I pay attention to during the test?
1 try to test at room temperature;
2 Avoid placing the instrument near electromagnetic fields (such as mobile phones, microwave ovens, etc.);
3 The amount of blood collected should not be too much or too little (especially the photochemical method of blood glucose meter).
6. What should I pay attention to when collecting blood?
It is very painful to take a blood spot if you choose it in the middle of your finger. It is generally recommended to take the blood point on the side of the finger, where the nerve distribution is less than the middle of the finger, and the pain is lighter. But don't get too close to the edge of the nail, so it's not easy to disinfect, it's not good for blood. The blood collection point can be selected in ten finger rotations, and most people select the remaining eight fingers except the thumb. Wash your hands with warm water before taking blood, and hang your arms to fill your blood vessels, which is easy to collect blood. After the blood collection pen pricks the finger, the blood should be squeezed from the base of the finger to the finger end (the blood collection point). Do not use strong blood to squeeze the blood. Otherwise, the extruded plasma and tissue fluid account for a large proportion, which affects the accuracy of the result. What if you don't bleed or have less blood? May be related to the following reasons:
1 The tip (finger) has a poor circulation. You can take warm water to wash your hands and hang your arms.
2 The depth of blood collection is not enough. The blood collection pen has different scales. It is necessary to know which scale is suitable for blood collection, and then “startâ€.
3 The skill of squeezing blood is not mastered. In addition to the above-mentioned "light force", the force of blood squeezing should be at least 0.5 cm from the blood collection point. When the blood is squeezed, the skin at the bleeding point can be seen to be congested. If you squeeze the blood too far from the bleeding point, the blood vessels are "squashed", how can you squeeze out the blood!
7. How should I maintain and clean the blood glucose meter?
The blood glucose meter should be placed in a dry and clean place, and stored at normal room temperature to avoid falling, soaking water, and not letting children, pets touch and play. The blood glucose meter allows the working temperature to be 10 ° C ~ 40 ° C, the humidity is 20% ~ 80%, too cold, too hot, too wet will affect its accuracy. In use, the blood glucose meter will be polluted by dust, fibers, debris, etc. in the environment, especially the blood that is accidentally applied to the test, which will affect the test results. Therefore, the machine should be cleaned and maintained regularly to remove blood stains and cloth dust. ,dust. When cleaning, wipe with a soft cloth dampened with water, do not use detergent to clean or infiltrate water into the blood glucose meter, and do not immerse the meter in water or rinse with water to avoid damage. Be sure to pay attention to the cleaning of the test area. Do not use organic solvents such as alcohol when wiping, so as not to damage the optical part. Care should be taken to keep the test strip in a dry, cool place. Do not touch the test strip of the test strip every time you use it, and pay attention to its expiration date.
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