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    Do I Use Ice for Venipuncture?

    Do not put ice directly on the vein, only proximal (closer to the heart); warm venous blood is flowing to the heart, so it doesn’t pass the cold until after the site of venipuncture; in over 40 venipuncture studies, Buzzy made collecting blood easier or was the same as other interventions; vibration vasodilates making the vein bigger and easier to find.