BD Vacutainer Citrate tubes are used to obtain a citrate plasma sample. They contain buffered sodium citrate solution, which is used as an anticoagulant. The tubes are available in a range of sizes in both plastic and glass and can be identified by a light blue cap. The 4.5ml BD Vacutainer glass buffered citrate tube has a clinically equivalent performance to the recognised global 'Gold Standard'. The BD Vacutainer citrate tubes are clinically proven in multi-centre clinical trials for coagulation testing across all major patient populations and evaluated with the most widely used coagulation analytical systems.