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.
Malecot catheter. 1. a two-or four-winged female catheter. 2. a tube with an expanded tip that is used for gastrostomy feedings. manometer-tipped catheter one with a small pressure transducer on its tip; used in measuring intravascular or intracardiac pressure.