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.
What is a suprapubic catheter? A catheter is a narrow plastic tube that can be put into the bladder to allow drainage of urine. The catheter is usually put in along the urethra or water-pipe (urethral catheter), but sometimes it can go directly into the bladder though the lower abdomen and this is a suprapubic catheter.