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Intravenous (IV) cannulation

The moment when you find a good venous access. Perfectly placed IV cannula 😂 Intravenous (IV) cannulation is a technique in which a cannula is placed inside a vein to provide venous access. Venous access allows sampling of blood, as well as administration of fluids, medications, parenteral nutrition, chemotherapy, and blood products. In general, it is advisable to select the smallest gauge of catheter that can still be effectively used to deliver the prescribed therapy; this will minimize the risk of damage to the vessel intima and ensure adequate blood flow around the catheter, which reduces the risk of phlebitis. However, if the situation is an emergency or if the patient is expected to require large volumes infused over a short period of time, the largest-gauge and shortest catheter that is likely to fit the chosen vein should be used.