Chapter 22: Surgical Asepsis - Nurselytic

Correct Answer: B

Rationale: Covering scrubs with a laboratory coat or isolation gown prevents contamination of the sterile environment when returning to the cardiac catheterization laboratory after leaving for lunch.

Correct Answer: C,D

Rationale: Sterile technique is critical when inserting tubes and needles because these procedures involve entering body tissues not normally exposed to pathogens and bypassing natural defenses, increasing infection risk if sterility is not maintained.

Correct Answer: B,D

Rationale: The parts of a sterile drape extending below the table surface are considered unsterile, and the outer 1-inch margin of the drape is also unsterile, allowing bare hand contact without contaminating the field. The other options are incorrect as they violate sterile technique principles.

Correct Answer: D

Rationale:
To maintain sterility, grasp the wrapper in the middle with sterile gloves, away from the unsterile outer margin, and drop it into the trash can from waist height to avoid contaminating the sterile field or gloves.

Correct Answer: D,B,A,C

Rationale: The correct sequence is to open the flap away from you first to avoid reaching over the sterile field, then open the side flaps, and finally open the flap toward you to maintain sterility.