Final answer:
It is possible to administer blood without bar code scanning, but doing so greatly increases the risk of medical errors. The coding of blood bags with the donor's blood type is a critical safety measure. Recombinant DNA technology enables diabetics to purchase human insulin, significantly advancing patient care.
Step-by-step explanation:
Administering blood without bar code scanning is technically possible, but it involves significant risks. Bar code scanning is a crucial part of modern medical safety procedures, ensuring the correct blood type is given to the correct patient. When a donor provides blood, the bag is coded with her blood type, and this information is essential for matching the blood to a recipient with the same or a compatible blood type to prevent potentially life-threatening transfusion reactions.
In the case of diabetic patients, the technology that makes it possible to purchase human insulin from a pharmacist is recombinant DNA technology. This has been a significant benefit over the past methods, as it allows for the mass production of human insulin that is identical to the insulin produced by the human body, thus reducing the risk of allergic reactions and other complications that were prevalent when animal insulin was used.