What type of material is most commonly used for catheters intended for long-term use?

Silicone is the most commonly used material for long-term catheters due to its biocompatibility, flexibility, and ability to resist kinking. Silicone catheters are designed to minimize irritation to the surrounding tissue and reduce the risk of infection, making them suitable for prolonged use in vascular access.

Silicone's inert nature means that it is less likely to react with medications or bodily fluids compared to other materials, providing a safer option for patients requiring long-term vascular access. This durability and reduced propensity for thrombosis and infection enhance the overall effectiveness and safety of long-term catheterization.

Other materials, such as PVC, while used in some short-term applications, do not offer the same level of biocompatibility and flexibility that silicone does. Metal catheters are typically used for very specific purposes and not for long-term vascular access, while rubber is less commonly used due to its tendency to degrade and cause irritation. Thus, silicone is the ideal choice for ensuring patient comfort and reducing complications during extended durations of catheter use.