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.
A Foley catheter is a sterile (germ-free) tube that is inserted through your urethra and into your bladder to drain urine. The catheter has a small balloon that is filled with solution to hold the catheter inside your bladder. A Foley catheter is also called an indwelling urinary catheter. You may need a catheter if: