Final answer:
A phlebotomist should warn a patient about the incoming needle to minimize discomfort, prevent sudden movements, and reduce needle stick injuries, thus ensuring a safe and effective procedure.
Step-by-step explanation:
Why a Phlebotomist Should Warn a Patient
A phlebotomist should warn a patient when the needle is coming to prepare them for the sensation and minimize discomfort or anxiety. This warning helps in reducing the risk of sudden movements from the patient which could lead to a needle stick injury to either the patient or the phlebotomist. Moreover, it demonstrates professional courtesy and helps to build trust between the phlebotomist and the patient. In situations where there are heightened risks, such as with drug addicts or patients more prone to infections, a clear communication is even more critical. Good communication practices also ensure that the procedure is completed safely and effectively, which is a fundamental aspect of phlebotomy and medical lab technology.