Black Lid Tube with 0.129mol/L sodium citrate
Black cap tubes, with 0.129mol/L sodium citrate buffer systems to carry out anticoagulation on blood specimen, are used for the testing blood sedimentation rate by Westergern method. The volume ratio between anticoagulant and blood is 1:4. They cover the dynamic blood sedimentation tube directly offering specimen and 75mm short tubes needing specimen transfer. Dynamic blood sedimentation tube may read directly on the frame after blood collection, or be used in blood sedimentation unit
