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.
Lumbar-peritoneal shunt: In cases of chronic increased intracranial pressure such as Idiopathic intracranial hypertension and Hydrocephalus, a tube or shunt with or without a one-way valve is used to drain the excess cerebrospinal fluid from the brain and transport it to the peritoneal cavity, which is a cavity located in the abdomen area of the body.