Final answer:
Calcium alginate dressing is the ideal choice for a pressure ulcer that requires protection and moisture absorption, due to its high absorbency and non-adhesive nature.
Step-by-step explanation:
When providing care to a patient with a pressure ulcer, it is essential to choose a dressing that both protects the ulcer and can absorb moisture. Among the options given, calcium alginate is the most suitable dressing for this purpose. Calcium alginate dressings are made from seaweed and are highly absorbent, which is especially beneficial for wounds with excess fluid or exudate. They are non-adhesive and can be easily cut to shape and packed into the ulcer without causing trauma to the wound upon removal.
Gauze, while commonly used, may not be the best option for pressure ulcers as it is less absorbent and can adhere to the wound bed, potentially causing damage when removed. Adherent films and hydrogel covered with foam have their specific uses as well; however, they may not provide the necessary absorption for heavily exuding ulcers. Hydrogel dressings are better suited for dry ulcers due to their hydrating effect. Therefore, the calcium alginate dressing would be the appropriate choice in this scenario.