Catheterization is a medical procedure that involves inserting a thin, flexible tube called a catheter into a body cavity or vessel. This is often done to drain fluids, deliver medications, or perform diagnostic tests. Catheterization can be performed in various settings, including hospitals and outpatient clinics, and is commonly used for patients with urinary issues or those needing heart procedures. There are different types of catheterization, such as urinary catheterization for bladder drainage and cardiac catheterization for examining heart conditions. The procedure is typically performed by trained healthcare professionals, ensuring patient safety and comfort throughout the process.