Which statement correctly describes the role of a medical assistant during pre-operative instructions?

The role of a medical assistant during pre-operative instructions is crucial for ensuring that the patient is adequately prepared for surgery. Informing the patient of all necessary preparations is a fundamental responsibility, as it helps to facilitate a smooth surgical experience. This includes explaining pre-operative instructions such as fasting guidelines, medication adjustments, and any lifestyle modifications the patient may need to follow before the procedure. This information is vital for the patient's safety and can significantly affect the outcome of the surgery.

The other options present roles and responsibilities that do not align with the actual duties of a medical assistant in this context. For instance, scheduling the surgical procedure is important, but it does not encompass the comprehensive support and communication required in pre-operative care. Similarly, ensuring the patient is unaware of the risks would be unethical and not in line with the principle of informed consent, which mandates that patients are fully aware of potential risks. Lastly, medical assistants do not conduct the surgical procedure, as that task is reserved for licensed medical professionals such as surgeons. Thus, the statement that medical assistants must inform the patient of all necessary preparations accurately reflects their important role in the pre-operative process.