Intravenous simply means ‘into a vein’. Medicines and other fluids can be given directly via a vein into your bloodstream. A fine tube, called a cannula, is inserted into a vein, usually in your arm or hand, using a needle. The cannula is then connected by an IV line (a long, thin tube) to an infusion pump that delivers the medicine or fluid. Infusions are usually given by medical staff…
