The Study of Efficacy and Safety of Automated PD in Urgent Start Dialysis

Inclusion Criteria: * CKD(chronic kidney disease)-5 stage patient whose eGFR（CKD-EPI（chronic kidney disease-epidemiology collaboration））\<15 ml/min/1.73m2,occured uremic symptoms or volume overload need of renal replacement therapy(RRT) within 14 days . * Prolonged RRT access is not available. * No dialysis treatment was given within 1 months. * The vital signs are stable and tolerable in peritoneal dialysis catheterization or central venous catheterization. * Able to understand the whole process of the trial, voluntarily participate in and sign informed consent. Exclusion Criteria: * Maintenance RRT alraedy. * Serious metabolic disorders ( hyperkalemia and acidosis) cause significant changes in electrocardiogram or other emergency indications to RRT within 24 hours. * Hypertensive emergencies(diastolic blood pressure\>130mmHg) * Severe respiratory, circulatory or hepatic failure requires instrumental support or vasoactive drugs to maintain vital signs. * High catabolic state eg. severe inflammation or trauma * Absolute contraindication of peritoneal dialysis such as recent abdominal surgery (\<1month), multiple abdominal surgeries. * Absolute contraindication for hemodialysis such as hemodynamic instability (systolic blood pressure \<80mmHg). * Pregnant. * Expected to survive for less than 1 years. * Plan for kidney transplantation within 3 months.