Many people use the terms ocean and sea interchangeably when speaking about the ocean, but there is a difference between the two terms when speaking of geography (the study of the Earth's surface).
The peritoneal dialysis catheter is composed of a flexible silicone tube with an open-end port and several side holes to provide optimal drainage and absorption of the dialysate. The extraperitoneal component of the catheter has either one or two Dacron cuffs. The Dacron cuffs are for optimal ingrowth and fixation.
The Strata NSC Lumboperitoneal Shunt System is designed for management of communicating hydrocephalus. The small lumen peritoneal catheter is designed as a distal component of a cerebrospinal fluid shunt system for use in shunting cerebrospinal fluid into the peritoneal cavity.