Catheterization is a medical procedure in which a thin, flexible tube called a catheter is inserted into a patient's body to either deliver fluids, medications, or contrast dye, or to collect samples or drain fluids from a specific area. Catheterization is commonly used in various medical specialties, such as cardiology, urology, and radiology, for diagnostic and therapeutic purposes. The procedure can be performed through different routes, including the urethra, blood vessels, or surgical incisions, depending on the specific medical condition being addressed. Catheterization plays a crucial role in the management of various medical conditions and is an essential tool for healthcare providers to deliver effective care to patients.