Objective: To observe the curative effects and safety of Rocal pulse therapy combined with low calcium dialysis in patients with secondary hyperparathyroidism undergoing haemodialysis.

• 目的：观察低钙透析联合罗钙全冲击治疗对维持性血透患者继发性甲状旁腺功能亢进的疗效和安全性。