Final answer:
To prevent needle movement during venipuncture, a phlebotomist should secure the needle with tape and keep the patient's arm still; wiggling the needle should be avoided as it can cause vein damage.
Step-by-step explanation:
The question addresses the proper techniques a phlebotomist should use to prevent movement of the needle in a patient's arm during venipuncture. To prevent movement of the needle, the phlebotomist should secure the needle with tape and hold the patient's arm still. Using a larger needle won't necessarily prevent movement and could cause more discomfort for the patient. Wiggling the needle is not advisable as it can damage the vein and cause discomfort. It is important to also use proper aseptic techniques to minimize the possibility of contamination.