PTH and Hypocalcemia: Dialysis is a key technology for treating CKD, and with the advancement of dialysis technology, the survival time of CKD patients is markedly prolonged; with prolongation of dialysis treatment time, almost all patients will experience a marked decline in vitamin D level and hypocalcemia and/or hyperphosphatemia, and long-term stimulation of parathyroid hormone secretion, leading to elevation in PTH level and causing SHPT [18].