All patients who undergo hemodialysis need a hemodialysis access. Most patients do not have an arteriovenous fistula established in advance, so they need to place a temporary blood catheter (hence the name "hemodialysis catheter") in the internal jugular vein or femoral vein for dialysis. It is also a vascular access for emergency hemodialysis, patients who cannot have an arteriovenous fistula temporarily due to immature fistulas or other conditions, and some long-term hemodialysis patients.
Introduction to hemodialysis catheters
Depending on the different retention times, hemodialysis catheters are divided into short-term dialysis catheters and long-term dialysis catheters.
Hemodialysis catheters are mainly composed of the following parts:
① Luer connector, which can be connected to hemodialysis tubing, heparin caps, etc.;
② Stop clamp, with pre-filled volume mark printed on it;
③ Connecting seat, with brand, model, etc. printed on it;
④ Rotatable suture wings, which can easily adjust the direction of the catheter side hole;
⑤ Polyurethane material tube body, the tube body has a length indication, generally 1cm interval, and the tube body has multiple side holes (more than 2).
⑥ Tube tip. Generally, special materials are used, which are softer than the tube body. The arterial and venous openings of some products are not in the same direction, but in a trapezoidal shape to avoid wall absorption.