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Generally, the POCT biochemistry analyzer requires minimal maintenance and routine maintenance can make the machine more durable.
1.1 Cleaning the Casing
Clean the outside of the machine once a week with a mild detergent and a soft wet rag.
Do not spray or pour any detergent or liquid directly onto the instrument. After wiping a soft rag or disposable tissue, wipe the machine.
1.2 Cleaning the Display
Wipe the display regularly with a damp, lint-free towel.
Clinical tests have specific requirements for test samples or types of anticoagulants.
The operators should tell the patients what should be noticed before the testing, which is a premise for accurate results.
First of all, we must understand the specific requirements of the specimen on the inspection principle.
For example, most of the instruments detected by optical method will be interfered by hemolysis and chyle in the specimen, and the chemical coloration method will be affected by the exogenous redox species.
The patients that are going to be collecting blood should be in a state of fasting and calming. The satiety and greasy food will interfere with the determination of platelet factor and fibrinolytic components. Emotional stress and intense exercise will also lead to measurement deviation.
The specimen must be fresh and doctors need to verify whether the patient takes the drug.
Diuretic may cause false positives in the nitrite test, and the urine may be contaminated with formaldehyde to cause false positives in the white blood cell test.
Differences in blood cell specificity may lead to differences in glucose determination in whole blood.
Differences in enzymes (oxidase, dehydrogenase, and glycosylase) may be further reflected in the methodology, even in capillaries, veins, and Differences in oxygen levels between arteries may also affect the results of certain instruments.
Various reagent strips and instruments based on immunochromatography, chromatography and dry chemistry techniques affect the activity of microproteins in the reaction matrix due to differences in temperature, humidity and pH, which in turn affects the results.
Pay special attention to the drying of the reagent strip. The test strip should be used as needed. Do not expose it to air for a long time to prevent the test paper from being damp or contaminated.
The analyzer based on the change of the magnetic field should avoid the magnetization of the iron powder reflected in the test tube. As an assay carrier, attention should be paid to the activity and expiration date of the activator or anticoagulant in the tube.
Humid air that attaches to the instrument's optical path system will affect the results, so the optical principle detection instruments (such as optical biosensors) that measure glucose, electrolyte or arterial blood gas should be storage in a dry place.
Adhere to quality control to determine whether the instrument is abnormal during use, use the quality control provided by the instrument manufacturer to draw a quality control chart and perform statistical analysis on the quality control chart. In principle, the instrument is calibrated at least once a week.
For example, portable blood coagulation instruments not only use the normal and abnormal plasma provided by the instrument manufacturer for indoor quality control every day, but also use the fresh venous plasma to perform inter-room quality control between similar instruments with the same methodological method and reagents.
Instrument keeper and self-monitoring patients should be familiar with the performance and storage conditions of the instrument
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