A nurse cares for a patient who has a serum potassium of 7.5 mEq/L and is exhibiting cardiovascular changes. Which should the nurse implement first?

A. Intact skin with nonblanchable redness, painful, warm, soft localized area over a bony prominence

Stage 1 pressure injuries are characterized by intact skin with nonblanchable redness over a localized area, typically over a bony prominence like the sacrum, heel, or elbow. The skin may feel painful, warm, and soft to the touch. Nonblanchable redness means that when pressure is applied to the area, the redness does not fade or blanch (turn white). This stage indicates that tissue damage has occurred, but the skin is still intact.

B. Shallow, open, shiny, dry injury, pink-red wound bed without sloughing or bruising: This description is more indicative of a Stage 2 pressure injury, which involves partial-thickness skin loss with an intact or ruptured blister. The wound bed is usually pink or red, and there is no sloughing or bruising.

C. Full-thickness tissue loss, slough and black eschar in wound bed with undermining and tunneling: This description corresponds to a Stage 3 or Stage 4 pressure injury. Stage 3 involves full-thickness tissue loss with visible subcutaneous fat but no bone, tendon, or muscle exposed. Stage 4 involves extensive tissue loss with exposure of bone, tendon, or muscle. Both stages may include slough (yellow or white tissue) and black eschar (hard, necrotic tissue), along with undermining (tissue destruction under intact skin edges) and tunneling (narrow passageways extending from the wound).

D. Full-thickness tissue loss, subcutaneous fat visible, possible undermining and tunneling: This description also corresponds to a Stage 3 pressure injury, as it involves full-thickness tissue loss with visible subcutaneous fat. The mention of possible undermining and tunneling further suggests a Stage 3 pressure injury.

A. Infection: While infection can certainly delay wound healing and contribute to the development of chronic wounds, it is more of a local factor rather than a systemic cause. Infections can hinder the normal healing process and lead to tissue damage, inflammation, and prolonged wound healing.

B. Malnutrition

A chronic wound is a wound that fails to progress through the normal stages of healing in an orderly and timely manner. Systemic factors can significantly impact wound healing, and malnutrition is one such systemic cause. Malnutrition, which refers to an inadequate intake or absorption of nutrients essential for healing, can impair the body's ability to repair tissues, fight infection, and generate new cells.

C. Continued pressure: Prolonged pressure, such as that experienced in pressure ulcers, can lead to tissue ischemia (lack of blood flow) and tissue necrosis, resulting in chronic wounds. However, this is considered a local factor related to the specific site of the wound and pressure-related damage.

D. Venous insufficiency: Venous insufficiency can cause chronic wounds, particularly venous ulcers, due to impaired venous return leading to increased pressure in the veins of the lower extremities. This pressure can result in tissue damage and poor wound healing. While venous insufficiency is a systemic condition, it primarily affects specific areas of the body (such as the lower legs) and is more directly related to the development of localized chronic wounds in those areas.