Many inspection items need pretreatment before formal inspection, and timely and appropriate specimen handling is something that every inspector must be familiar with and follow.

Specimens should be sent for inspection by special personnel in time after collection. During transportation, the specimen container should be prevented from being broken and the specimen lost. During transportation, the container should be sealed from light (such as bilirubin in blood will decompose under direct sunlight) and pay attention to biological safety to prevent accidents. Specimen transfer requirements for common inspection items:

1. Routine items that must be submitted for inspection immediately after sampling, such as blood ammonia, erythrocyte sedimentation rate, blood gas analysis, acid phosphatase, lactic acid and various bacterial cultures, especially anaerobic cultures.

2. Routine items submitted for inspection within 0.5 hours after sampling, such as blood sugar, electrolyte, hematology, coagulation test, body fluid cytology, bacterial and fungal smear, etc.

3. protein, pigments, hormones, lipids, enzymes, antigens, antibodies, etc. Routine items submitted for inspection within 1~2 hours after sampling.

4. The detection items that need to be frozen immediately after collection include corticotropin, acetylcholinesterase, acetone, blood ammonia, free fatty acids, lactic acid, pyruvate and renin.

5. Detection items that need to be protected from light. Photosensitive substances, such as bilirubin, β-carotene, erythroporphyrin, etc., need to be protected from light to remain stable. The aluminum cover can be used to cover the outer wall of the test tube.