Catheter
Term:Catheter
Category: Medical Devices
Definition: A catheter is a thin, flexible tube made from materials like silicone, latex, polyurethane, or polyethylene. It is biocompatible and designed to be inserted into body cavities, ducts, or vessels. Catheters can drain fluids, deliver medicines, nutrients, or may be used for diagnostic purposes. There are different types, including urinary catheters, intravenous (IV) lines, cardiac catheters, and central venous catheters, each made for a specific use. Many catheters have special coatings that make them easier to insert, help prevent infections, or slowly release medication.
How it Works:
- Inserted into a body cavity or vessel using sterile technique.
- Create a controlled passage for fluid movement or drug administration.
- May use gravity, suction, or pressure gradients to drain or infuse fluids.
- Some catheters include a balloon to secure placement.
- Specialized designs may monitor or respond to physiological changes.
Common Uses:
- Urinary drainage in patients with urinary retention or post-surgery.
- Intravenous therapy for medication or nutrient administration.
- Cardiac catheterization for diagnostic imaging and intervention.
- Dialysis access for blood purification.
- Wound drainage or removal of pus or excess fluid after surgery.
Related Content and Resources:
Hydrophilic Catheter Coatings For Reduced Friction
