Before testing, the code displayed by the blood glucose meter should be checked and adjusted in accordance with the code on the test strip box. Note that each instrument has its own corresponding test strip, not to cross-use with other types of instruments. The test paper code is in various forms. When purchasing a blood sugar meter, please read the instructions in detail.
Test strip expired
When purchasing and before using, attention should be paid to checking the validity period of the test strip packaging box. Do not use the expired test strip, in order to avoid affecting the test results. The blood glucose meter inserts the expired test paper into the instrument, which will automatically prompt the expiration of the test paper.
Improper preservation of test paper
Many detection errors are caused by the deterioration of test strips. Some blood glucose meters measure blood sugar by the principle that the enzyme (oxidase or glucokinase) on the blood glucose test strip reacts with the glucose in the blood and displays the color. The blood glucose meter displays the reading after distinguishing. The probability of failure of the blood glucose meter itself is small, but the test strip will be affected by the temperature, humidity and chemical substances of the test environment, so the preservation of the test strip is very important. To avoid dampness, keep it in a dry, cool and dark place and keep it sealed after use. Test strips should be stored in the original box, not in other containers. Do not touch the test area of the test strip with your fingers, etc. The blood sugar test paper is an oxidase, and its storage time is shorter than other test papers, especially when stored.
Improper operation may lead to failure or inaccurate measurement. The operation procedures of various blood glucose meters are similar, so patients must read the instructions carefully and master the operation methods of blood glucose meters correctly. Common incorrect operations are as follows: 1. The test strip is not fully inserted into the bottom of the test hole during the test. 2. Some instruments drip blood first, and then insert test strips into the blood sugar meter. If the waiting time exceeds two minutes before inserting test strips into test holes, the test results will be inaccurate. At this time, new test strips should be used to re-test. 3. The movement of test strip will also affect the test results, so the blood glucose meter should be used in a stable and safe place.
Alcohol can react with chemicals on the test strip and result in inaccurate blood sugar values; moreover, when alcohol is not completely volatilized, needle insertion will increase the pain, so it is necessary to take blood after alcohol volatilization.
Improper blood collection
_Insufficient blood collection during the test will lead to the failure of the test or the low result of the test. It is necessary to replace the test strip for re-determination. If the blood drop is too large, the spillover area will also affect the results. The proper method to confirm the size of blood droplets is to use a new test strip to drop a drop of blood in the test area to confirm that the "blood volume confirmation dot" on the back of the test strip completely discolored. In addition, poor circulation of extremity endings, poor blood flow or excessive extrusion will also affect the results of blood collection. 2. Most blood glucose meters on the market can not collect blood from many parts, so they should be operated according to the instructions, generally taking blood from finger tips.
When testing blood sugar, it is often polluted by dust, fibers and sundries in the environment. Especially when the blood is carelessly polluted in the test area of the instrument, the test results will be affected. Therefore, the blood sugar meter should be checked, cleaned and calibrated regularly. Be careful to clean the test area. Do not use alcohol or other organic solvents when wiping, so as not to damage the instrument. Use cotton swab or soft cloth to dip in water to wipe.
The calibration of blood glucose meter is to check whether the blood glucose meter and test paper work properly with the simulated blood glucose solution (which is distributed with the instrument when purchased). The simulated blood glucose solution contains a known concentration of glucose, which can react with the test strip.
The calibration of the blood glucose meter is as follows: 1. The newly purchased blood glucose meter is used for the first time. 2. Each time a new bottle of test paper is used. 3. If you suspect that there is a problem with the blood sugar meter or test paper. 4. When the test results fail to reflect the physical condition you feel (e.g. feeling hypoglycemic symptoms, but the measured blood sugar results are higher). 5. After the fall of the blood sugar meter.
When calibrating the blood glucose meter, we should pay attention to: 1. Don't use expired simulated blood glucose solution; 2. The simulated blood glucose solution is effective within three months after opening the bottle, so the expiration date should be indicated after the first opening of the bottle, and the simulated blood glucose solution should be discarded after three months; 3. It is not appropriate to store the simulated blood glucose solution in the environment of temperature over 30 degrees Celsius, nor to refrigerate or freeze it; 4. If the test results of simulated blood glucose solution are not in the test paper When the acceptable range on the box is displayed, do not continue to use the blood glucose meter for the time being, and find out the reason in time.
After using the blood sugar meter for a period of time, if the "low power" words or symbols are displayed on the display screen during the test, considering the lack of battery power, new batteries should be replaced in time.
For example, hematocrit, triglyceride concentration, hypotension, hypoxia, some drugs and so on.
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