A two or three piece system that consists of a needle and an outer catheter/sheath is which of the following?

A two or three piece system consisting of a needle and an outer catheter or sheath is referred to as an angiocath. This system is designed for venous access, allowing healthcare professionals to insert the needle into a vein and then advance the catheter (or sheath) into the vessel while withdrawing the needle. The outer catheter provides a stable path for infusions or blood draws and reduces the risk of complications such as vessel perforation or hematoma formation.

The angiocath is specifically engineered for ease of use, making it a common choice in both emergency settings and routine intravenous therapy. Its design enables quick insertion and provides a secure way to deliver medications, fluids, or draw blood without the need to repeatedly puncture the vein. This functionality is crucial in interventional procedures and caring for patients requiring long-term or frequent vascular access.

Other choices do not represent a similar two or three piece system for vascular access; for instance, an IV piggyback refers to a method of administering a secondary intravenous solution concurrently with a primary IV line, which does not specifically focus on the needle and sheath concept. A butterfly needle is a device with wings used for short-term venipuncture, and while it has a needle component, it lacks the outer sheath that