How to prevent vacuum blood collection tubes back flow
Why can cause blood reflux: Vacuum blood collection tubes “vacuum” refers to a state of no air, which is lower than the atmospheric pressure state. Vacuum vessel pressure (negative pressure) is based on the increase or decrease in blood volume settings. When the band sets of pressed vein, vascular pressure rise – Lancets intervention after elbow vein blood flow of negative pressure vacuum state mining Endovascular. Pre-depleted blood volume of the end of negative pressure, at this time, vascular pressure = vacuum mining among endovascular ! Blood drive off the end as a result of intravascular blood pressure with low emphasis on the rapid return to normal pressure, at this time, vascular pressure vacuum intravascular pressure, there may have been pumping blood to return to vascular risk.
The blood to prevent blood reflux methods:
- Remove the drive when the blood with blood. Taken to avoid contact with blood out part of the needle
- Do not remove the blood with the blood drive, it takes the blood to avoid contact with blood collection needle out of part (blood collection tube socket move downward, to avoid blood collection needle out and has taken some of the blood contact), this could be prevented back flow.