Final answer:
For a stage 2 pressure injury, a hydrocolloid dressing is appropriate because it maintains a moist healing environment and protects against contamination.
Step-by-step explanation:
If a nurse is preparing to apply a dressing for a client with a stage 2 pressure injury, the appropriate type of dressing to use is a hydrocolloid dressing. Hydrocolloid dressings are adhesive, occlusive wound dressings made from gel-forming agents that create a moist environment conducive to healing and are ideal for slight to moderately exuding wounds. This type of dressing also helps in the prevention of bacterial contamination, provides a barrier against external contaminants, and does not require daily dressing changes, making it suitable for the treatment of stage 2 pressure injuries