Urinary catheterization is a medical procedure used to drain urine from the bladder when a person is unable to do so naturally. A thin, flexible tube called a catheter is inserted through the urethra into the bladder. This can be necessary for various reasons, including surgery, urinary retention, or certain medical conditions. The procedure can be performed by healthcare professionals in a hospital or clinic setting. It is important to maintain proper hygiene during catheterization to prevent urinary tract infections (UTIs). Catheters can be temporary or long-term, depending on the patient's needs and circumstances.