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.)
Phase 4 trials (22)
Phase 3 trials (10)
Phase 2 trials (9)
Phase 1 trials (4)
Other trials (7)