Venenverweilkanüle

A Venenverweilkanüle, often referred to in English as an intravenous cannula or IV cannula, is a medical device used to access a patient's vein for the administration of fluids, medications, or blood products. It is a small, flexible tube made of plastic, typically polyurethane or Teflon, that is inserted into a vein.

The Venenverweilkanüle consists of a needle stylet, which is used to pierce the skin and vein wall, and a catheter that remains in place once the needle is withdrawn. The needle is usually housed within the catheter during insertion. Once the vein is accessed and the catheter is advanced into it, the needle stylet is removed. The catheter is then secured to the skin with adhesive dressings.

These cannulas come in various sizes, indicated by a gauge number. Smaller gauges are used for patients with smaller or fragile veins, such as infants or the elderly, and for administering less viscous fluids. Larger gauges are used for rapid fluid or blood administration, or for delivering thicker medications.

The primary purpose of a Venenverweilkanüle is to provide a reliable and relatively comfortable route for intravenous therapy. It allows for continuous infusion or intermittent administration of substances directly into the bloodstream, bypassing the digestive system. This ensures faster and more predictable therapeutic effects. Proper insertion technique and care are crucial to prevent complications such as phlebitis, infiltration, or infection.