For the client who reports pain, the nurse should consider the following as the most reliable indicator of pain:

Choice A reason: Initiating humidification therapy can be beneficial for a client with pneumonia. Humidified air can help loosen respiratory secretions, making them easier to expectorate. However, while this intervention is helpful, it is not typically the first action a nurse should take. The priority is to address the client's immediate need for adequate oxygenation and ventilation.

Choice B reason: Encouraging the client to cough and perform deep breathing exercises is an essential part of care for patients with pneumonia. These actions help to clear mucus from the lungs and improve ventilation. Deep breathing helps to fully expand the alveoli, which can be compromised in pneumonia, and coughing helps to expel secretions that may be blocking the airways. However, this is not the most immediate action when the oxygen saturation is borderline normal.

Choice C reason: Increasing the client's oral fluid intake is important in the management of pneumonia. Adequate hydration thins respiratory secretions, making them easier to clear. It also supports overall bodily functions, which can be taxed during illness. Nonetheless, this intervention is not the most critical initial step in managing a client's immediate respiratory needs.

Choice D reason: Raising the head of the bed is the correct and immediate action to take for a client with pneumonia and an oxygen saturation of 88%. This position helps to improve chest expansion, promotes better lung aeration, and facilitates easier breathing. It also reduces the risk of aspiration, which is particularly important in clients with pneumonia. Elevating the head of the bed is a simple yet effective way to enhance oxygenation and should be the first step taken.

The correct answer is: a. Edema.

Choice A: Edema

Edema is swelling caused by excess fluid trapped in the body’s tissues. It is a common sign of inflammation and infection. When a wound becomes infected, the body’s immune response can cause increased fluid accumulation in the affected area, leading to noticeable swelling. This swelling is often accompanied by redness, warmth, and pain, which are classic signs of infection.

Choice B: Petechiae

Petechiae are small, red or purple spots caused by bleeding into the skin. They are not typically associated with wound infections but rather with conditions that cause bleeding or clotting disorders. Petechiae do not indicate an infection but rather a different underlying issue that may require further investigation.

Choice C: Urticaria

Urticaria, also known as hives, is a skin reaction that causes itchy welts. It is usually a result of an allergic reaction and is not a sign of wound infection. Urticaria is characterized by raised, red, itchy bumps on the skin and does not typically occur in response to an infected wound.

Choice D: Crusting over granulated tissue

Crusting over granulated tissue is a normal part of the wound healing process. Granulation tissue forms as the wound heals, and a crust or scab may develop over it to protect the new tissue underneath. This is not an indication of infection but rather a sign that the wound is progressing through the healing stages.