Venous Cutdown

**Definition:** Creation of a small incised opening in a vein to permit the passage of a needle or cannula for withdrawal of blood, administration of medication, or in diagnostic or therapeutic catheterization. (Dorland, 28th ed.; Stedman, 26th ed.)

**Tree numbers:** - E04.100.814.895

**Synonyms:** - Vein Cutdown - Venostomy - Cutdown, Venous