After the detachment of the renal puncture fistula drain, it is necessary to observe the condition of the drainage area and hydronephrosis, and the main treatment options include daily observation and re-tubing. 1. Daily observation: If the ultrasound examination shows that the drainage area is in good condition and the hydronephrosis is obviously reduced after the drain is dislodged, then there is no need to intervene too much, and the renal recovery and urinary output should be checked regularly. 2. Replacement of drain tube: After the drain tube is dislodged and further examination reveals that there is still obvious hydronephrosis, it is necessary to reposition the drain tube to further drain the hydronephrosis. After the drainage tube is dislodged, do not blindly dispose of it, you need to consult a doctor in time to diagnose the cause of the disease and then do further treatment to prevent unnecessary damage and affect the recovery of kidneys.