Final answer:
The first action of a phlebotomist in an emergency during a blood draw is to safely remove the needle and apply pressure to the site, followed by assessing the patient's condition and calling for assistance if needed.
Step-by-step explanation:
If an emergency arises during a blood draw, the first action of the phlebotomist is to ensure the safety of the patient. This involves promptly removing the needle from the patient's arm and applying pressure to the site of the venipuncture to stop any bleeding.
Immediate assessment of the patient's condition is required to determine if they are experiencing a vasovagal reaction, which is a common cause of fainting, or if there is a more serious issue such as a seizure or cardiac event. The phlebotomist must be prepared to call for assistance and implement emergency procedures as dictated by the clinic or hospital's protocols.