Track series are biosensors base in line bioanalysis especially designed for hemodialysis therapy. It provides a new tools for adequate dialysis prescription and delivery.Sample:HemodialysateAssay Items: Urea,( Na K :optional) Features:Display real time data of BUN concentration during dialysis and Kt/V, PCR and SRI at end od dialysis.Technology Source:The urea biosensor which used in TRACK was developed by the following patent technology.The technology can also use in the development of Glucose sensor and other relative sensor. US PATENT NO. 5028657,5171779,5306768ROC PATENT NO. 37218,35343, 40781