1. Do not eat too greasy, high-protein food the day before blood draw, and avoid heavy drinking. The ethanol composition in the blood will directly affect the test results.
2. After 20:00 on the day before blood collection, fasting for 12 hours should be started to avoid affecting the test results.
3. When taking urine samples for examination, clean the vulva before leaving urine. The containers used should be clean and free of contamination, and should not be mixed with chemicals such as detergents, disinfectants and preservatives, so as not to affect the test results.
4. Women should prevent leucorrhea from mixing with urine, pay attention to expel a part of the urine first, and then take the sample, that is, take the middle part of the urine.
5. The urine should be sent for inspection immediately to avoid false test results after the urine is placed.