Final answer:
The correct dressing for an open chest wound is a dry sterile dressing.
Step-by-step explanation:
The correct dressing to apply to an open chest wound is a dry sterile dressing (option B). This type of dressing helps to prevent infection and promotes healing by keeping the wound clean and protected. A dry sterile dressing consists of a clean, non-stick pad that is placed directly over the wound, and then secured with medical tape or a bandage.
Applying an occlusive dressing (option C), which completely seals the wound, is not recommended for an open chest wound as it can trap air or other fluids inside the chest cavity, leading to complications. A wet dressing (option D) is not suitable for an open chest wound as it can introduce moisture and increase the risk of infection.
Gauze (option A) may be used as a temporary measure to control bleeding, but it is not the dressing of choice for an open chest wound.