Cannulisation refers to the process of inserting a cannula into a vein or artery for medical purposes. Some synonyms for this term include cannulation, venipuncture, vascular access, and intravenous catheterization. Cannulation is commonly used in medical procedures such as hemodialysis, blood transfusion, and the administration of intravenous medications. Vascular access is an even broader term that can refer to any method for accessing the bloodstream, including catheterization or a peripherally inserted central catheter (PICC line). While these terms may differ slightly in meaning, they all describe the process of accessing the bloodstream for medical purposes.