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Hold the skin taut with one hand while inserting the needle with the dominant hand. Approach the vessel as shallow as possible (less than 30 degrees angle to the skin) with the bevel of the needle facing up or away from the patient. Once a “pop” is felt and/or a flash of blood is seen in the reservoir of the IV needle, advance the needle slightly further, and slowly slide the catheter over the needle, cannulating the vessel with the plastic catheter while not moving the needle itself (Figure 8.4).