A urinary catheter is a hollow, partially flexible tube that collects urine from the bladder and leads to a drainage bag. They come in many sizes and types. Catheters may be necessary in cases when ...

They may be thin, flexible tubes called soft catheters or thicker and more inflexible catheters called hard catheters. A catheter that may be left in the body, whether temporarily or permanently, is ...

Medical catheters are tubes that can be inserted into a body cavity, vessel or duct, usually to allow for the administration of fluids, medications or gases or to drain fluids or urine from the body.