Conforms to Special beveled extra strong spike. Self-sealing latex tube for extra medication & easy flushing. Highly kink-resistant tubing. Roller clamp for flow controller. Infusion therapy is a type of therapy where liquid medication is injected into the body. This can be done by inserting a needle through the skin or through an intravenous line. The most common types of infusion therapy are intravenous (IV) and subcutaneous (SC). IV infusions are given through an intravenous needle inserted into a vein, while SC infusions are given through a small needle inserted just below the skin.