Final answer:
Informed consent is the process of ensuring that a patient understands and agrees to a medical procedure. It involves the healthcare provider explaining the purpose, risks, and benefits of the procedure, and the patient giving their voluntary consent.
Step-by-step explanation:
The process of ensuring that a patient understands and agrees that their blood is going to be drawn is called informed consent. In the context of medical procedures, informed consent refers to the communication between a healthcare provider and a patient, where the provider explains the purpose of the procedure, the potential risks and benefits, and any alternative options available. The patient, after understanding the information provided, then consents to the procedure voluntarily.