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Appropriate Dosage Of Unfraction Heparin And Low Molecular Weight Heparin In Hemodialysis Patients [Article in Chinese] Xiao Q, Sun XF, Zhang D, Ma ZF, Wu MG, Wang H, Chen XM. Institute of Nephrology, General Hospital of Chinese People's Liberation Army, Beijing 100853, China.   Abstract OBJECTIVE: To investigate the appropriate dose of unfraction heparin and low molecular weight heparin (LMWH) in hemodialysis patients.   METHODS: Thirty-eight hemodialysis patients were enrolled and randomly allocated into four groups.The initial bolus dose for the Low-dose (LH, n = 10) and high-dose heparin (HH, n = 10) groups were 35 U/kg and 55 U/kg, respectively.The repeated maintenance dose for both groups were 10 U/kg.h and 16 U/kg.h, respectively. Fragmin were administered as single bolus (60 U/kg or 80 U/kg) at 30 minutes before hemodialysis in Low-dose LMWH(LLMWH, n = 10) and High-dose LMWH (HLMW, n = 8) group, respectively. Furthermore, the dialysis circuits in LUFH and LLMWUF