Is there any particular order for blood sampling during physical examination

The order of blood sampling for physical examination usually has certain requirements, which need to be arranged according to the priority of the testing items and the characteristics of the blood collection vessels. When collecting blood samples in clinical practice, priority is usually given to collecting anticoagulant tube specimens, such as EDTA anticoagulant tubes used for blood routine or sodium citrate anticoagulant tubes used for coagulation function testing. This type of specimen is sensitive to clotting time, and delayed collection may lead to blood clotting affecting the results. Next, collect biochemical tubes such as serum separation tubes, which have relatively relaxed requirements for coagulation. Finally, blood samples for special items such as blood glucose are collected, as they are easily affected by time factors. Some special tests, such as blood culture, require strict aseptic operation and may be arranged separately for priority collection. The blood collection sequence also involves preventing cross contamination between different additive tubes, such as avoiding residual EDTA tubes in blood potassium testing. Before the physical examination, one should maintain an empty stomach for 8-12 hours to avoid intense exercise and emotional fluctuations. After blood collection, the puncture site should be pressed for 5-10 minutes to prevent bruising, and the puncture site should be kept away from water or weight for 24 hours. If you experience discomfort such as dizziness, you can lie down and rest, and inform medical staff in a timely manner. Maintaining a balanced diet and regular daily routine can help obtain accurate test results.