In medical experiments and clinical testing, blood collection vessels are an important tool for collecting and preserving blood samples, and their usage methods and precautions are crucial to ensuring sample quality and accuracy of experimental results. Blood coagulants, as a common additive in blood collection, can accelerate blood coagulation, making blood samples easier to process and preserve. The method of adding blood coagulants to blood collection vessels 1. Choose the appropriate blood collection vessel Before adding blood coagulants, it is necessary to first select a blood collection vessel that is suitable for experimental or testing needs. Different blood collection vessels may have different materials, volumes, and additives. Therefore, when selecting blood collection vessels, specific experimental or testing requirements should be considered, such as sample size, storage time, and whether special treatment is required. 2. Adding blood coagulants Add the prepared blood coagulant to the blood collection vessel in the prescribed proportion. Usually, blood coagulants are provided in the form of dry powder or suspension, and when added to the blood collection vessel, they need to be evenly distributed on the inner wall. 3. Gently invert the blood collection tube After collecting blood from a blood collection vessel containing a coagulant, it is necessary to gently invert the blood collection vessel several times to ensure that the blood coagulant is fully mixed with the blood sample. This step is crucial for ensuring uniform blood coagulation.