1. vacuum blood collection tubes purposes:

Webster method dedicated to the erythrocyte sedimentation rate ESR measurement points , blood collection and anticoagulation , anticoagulants and blood volume ratio of 1:4 .
9 x 120mm ESR Tube: ESR analyzer tube, additives are sodium citrate , used to check blood cell sedimentation rate blood collection and anticoagulation .
13 x 75mm tube ESR : ESR generally used for testing the concentration of sodium citrate, 3.2% and 3.8 % of the volume of anticoagulant and blood ratio of 1:4 , when the high proportion of anticoagulant , the blood is diluted , can ESR . Heparin anticoagulant potential of red blood cells can be changed , it is not suitable for the detection of erythrocyte sedimentation rate .

2. the vacuum blood collection tubes Specification Features:

Color : black
Spec : 9 x 120mm, 13 x 175mm
Capacity : 5ml
Common blood volume : 1.6ml, 2.4ml
Types of additives : 3.8 % sodium citrate
Material: Glass
Maximum vacuum error : <= 5%
3. blood collection tubes NOTES:

1 , 180  immediately after blood collection were mixed gently invert 5-6 times .
2 Please note that when blood collected enough blood to ensure the accuracy of test results