What are core principles of sterile technique for invasive procedures?

• A. Aseptic field, sterile gloves, sterile instruments, maintain sterile barrier, avoid contamination, proper hand hygiene, and minimal movement around sterile area.
• B. Use non-sterile gloves; no need for sterile field.
• C. Sterile field is not required if gloves are sterile.
• D. No specific dressings or barriers are necessary.

Answer: (A)

Maintaining a sterile field and barrier integrity is essential to prevent infection during invasive procedures. The best option lists creating an aseptic field, using sterile gloves and sterile instruments, keeping the sterile barrier intact, avoiding contamination, practicing proper hand hygiene, and minimizing movement around the sterile area. Each element supports a continuous zone where only clean, sterile items touch the patient, reducing the risk of introducing pathogens. Creating the aseptic field ensures everything used stays free of microbes; sterile gloves and instruments prevent transfer of organisms during handling; preserving the sterile barrier means not breaking the field by touching non-sterile surfaces or instruments; proper hand hygiene lowers the microbial load on hands; and limiting movement around the area helps prevent air currents from carrying contaminants into the field. The other statements undermine sterility: using non-sterile gloves or omitting a sterile field invites contamination; having sterile gloves without a sterile field is not sufficient to keep the area truly clean; and neglecting dressings or barriers removes critical protections that help maintain sterility during and after the procedure.