Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Catheterization, venous
Medically reviewed by Dr. Otari Nergadze, Neurosurgeon | Updated: January 2026
Catheterization, venous: The insertion of a tiny tube (a catheter) into a peripheral or central vein to deliver fluids or medication. This is the most frequently used method for the administration of intravenous (IV) fluids and IV meds (medications).
The most common complications of venous catheterization are infiltration of fluid around the catheter, failure of the line to stay open, and infection somewhere along the length of the catheter (catheter sepsis).