Final answer:
A medical assistant should never reach across a sterile field. Reaching across can introduce microbes, contaminate the sterile field, and put the patient at risk for sepsis.
Step-by-step explanation:
A medical assistant should never reach across a sterile field. Reaching across a sterile field can introduce microbes and infectious agents, which can contaminate the sterile field and put the patient at risk for sepsis. It is important for the medical assistant to maintain aseptic technique and follow protocols for creating and maintaining a sterile field.