Which of the following is not a method of vascular access for hemodialysis?

The method of vascular access for hemodialysis specifically refers to techniques used to establish an access point for the dialysis machine to connect with the patient's bloodstream. An intravenous infusion is typically a method used for delivering medications or fluids directly into the bloodstream but is not designed for the sustained and stable blood flow required for hemodialysis.

In contrast, an AV fistula is a surgical connection made between an artery and a vein, creating a high-flow access point that is preferred for long-term dialysis due to its durability and low risk of infection. An AV graft also serves this purpose by using synthetic material to connect the artery and vein, but often has a higher risk of complications compared to an AV fistula. A hemodialysis catheter is another viable option, often used for short-term access or when other methods are not available, inserted directly into a large vein.

Given these definitions, the selection of an intravenous infusion highlights the distinction between medical procedures used for drug delivery versus those specifically designed for blood filtration in hemodialysis.