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What are the factors that affect the vacuum degree of vacuum blood collection tubes?

Views:1     Author:Site Editor     Publish Time: 2021-05-26      Origin:Site

The vacuum blood collection tube is the collection tube of the specimen. It is also the detection tube. The quantitative vacuum in the blood collection tube provides power to the blood collection process and realizes quantitative collection. Whether the vacuum setting is accurate will have a greater impact on the test results. The following are several important factors that affect the degree of vacuum:


1. Ambient atmospheric pressure: the higher the altitude, the smaller the blood collection volume.


2. Ambient temperature: the higher the temperature, the lower the vacuum degree, the less blood will be collected; on the contrary, the lower the temperature, the more blood will be collected.


3. Product storage time: Generally speaking, the longer the storage time, the less the amount of blood collected. This is mainly due to the vacuum leakage of the test tube and its seal of the blood collection tube.


4. Individual differences in patients (such as venous pressure, blood viscosity, vascular status, etc.): For example, over-tension of patients, high blood viscosity of chemotherapy patients, and hardening of the blood vessels may cause inaccurate blood collection.


5. Blood collection technology and matching blood collection needle types: for example, the selection of needle type, the judgment of blood collection end point, the selection of venipuncture site, etc. If improper handling, the blood collection volume will be inaccurate.


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