A nurse is caring for a patient with pneumonia who has been on oxygen therapy for several days.
Which of the following symptoms should the nurse recognize as a potential adverse effect of oxygen therapy?

Choice A rationale

Full-thickness tissue loss extending to underlying support structures such as muscle, tendon, or bone is characteristic of a stage 4 pressure ulcer, not a stage 312.
Choice B rationale
A stage 3 pressure ulcer involves full-thickness skin loss and may appear as a deep crater. There may be damage to or necrosis of subcutaneous tissue that may extend down to, but not through, underlying fascia. This description matches the statement in Choice B, making it the correct answer.
Choice C rationale
A shallow, ruptured or intact skin blister without slough is more indicative of a stage 2 pressure ulcer. In a stage 2 pressure ulcer, there is partial-thickness loss of dermis presenting as a shallow open ulcer with a red-pink wound bed.
Choice D rationale
Unbroken skin with un-blancheable erythema is characteristic of a stage 1 pressure ulcer, not a stage 3. In a stage 1 pressure ulcer, the skin is not broken, but it has redness that does not lighten (or blanch) when you press on it.

Choice A rationale
A client who has community-acquired pneumonia with copious respiratory secretions should be assigned to the private room. This is because pneumonia, especially with copious respiratory secretions, can be transmitted through the air, and therefore requires airborne precautions.
Choice B rationale
A client who has AIDS and is coughing up blood may not necessarily require a private room for airborne precautions. While AIDS is a serious condition, it is not primarily transmitted through the air. Instead, it is transmitted through direct contact with bodily fluids, particularly blood, semen, vaginal fluids, and breast milk.
Choice C rationale
A client who has Guillain-Barré syndrome and is on a ventilator would not necessarily require a private room for airborne precautions. Guillain-Barré syndrome is a neurological disorder, not an infectious disease, and it is not transmitted from person to person.
Choice D rationale

A client who has bronchitis and a tracheostomy may not necessarily require a private room for airborne precautions. While bronchitis can be caused by an infection, it is typically transmitted through direct contact or droplet transmission, not through the air.