Pediatric peritoneal dialysis is prescribed according to the type of dialysis, the volume infused and the dialysis time. The measurement of intraperitoneal pressure (IPP) is an important and easy indicator to perform. A IPP greater than 18 cmH20 has been correlated with pain and dyspnea, a IPP greater than 14 has been correlated with a higher risk of peritonitis and a IPP greater than 13 was correlated with higher mortality and a switch on hemodialysis. These data suggest the importance of routine IPP measurement. Few data are available in the pediatric population.

Inclusion criteria:

• Minor subject (<18 years old)
• In stable peritoneal dialysis for more than 3 months
• Subject having had at least 3 IPP measurements
• At least 3 months after surgery to insert a peritoneal dialysis catheter
• Subject (and / or his parental authority) not having expressed, after being informed, his opposition to the reuse of his data for the purposes of this research.

Exclusion criteria:

- -Subject (or his parents) having expressed his (their) opposition to participating in the stud

Minor subject (<18 years old) in stable peritoneal dialysis for more than 3 months and having had at least 3 IPP measurements