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.
Peritoneal dialysis--state-of-the-art 2012 by Reference & Research Book News. This study helps to shed light on a long-standing dilemma in renal transplant surgery: whether to remove the. (PD) catheter at the time of transplant surgery or to leave it in place until established renal allograft function down the road.