Final answer:
A phlebotomist is required to perform the venipuncture after donning gloves despite the patient being HIV positive, as per OSHA regulations and universal precautions, treating all patients as potentially infectious.
Step-by-step explanation:
When a phlebotomist is informed that a patient is HIV positive before performing a venipuncture, according to OSHA regulations, the appropriate action after donning gloves is to perform the venipuncture. It is not necessary to apply an extra set of gloves, have a supervisor observe the draw, or don additional personal protective equipment such as a mask and eye protection unless there is an expected exposure to blood or other potentially infectious materials that could result in splashes, sprays, or spills.
Universal precautions should be taken with every patient, treating all blood and body fluids as if they are infectious, regardless of the patient's known status. This includes using new, sterile needles for each patient, wearing gloves during procedures, and following proper disposal procedures for all potentially infectious materials.