A nurse is reinforcing teaching to a client who was recently diagnosed with osteoarthritis about the disease process.
Which of the following statements about the pathophysiology of osteoarthritis should the nurse include in the teaching?

Choice A rationale

Flaky skin, or desquamation, is a non-specific finding that can be seen in various conditions, including chronic dermatitis or simple xerosis. It represents the shedding of the outermost layer of the epidermis and does not effectively differentiate between the deep bacterial infection of cellulitis and the more superficial inflammatory reaction of dermatitis. While it indicates a disturbance in skin barrier function, it lacks the diagnostic specificity required to confirm the presence of an acute infectious process.

Choice B rationale

The presence of pustules is a significant clinical cue that often points toward an infectious etiology, such as folliculitis or localized cellulitis, rather than simple contact dermatitis. Pustules contain purulent exudate consisting of white blood cells and cellular debris, signaling a primary immune response to bacteria like Staphylococcus aureus. While some forms of dermatitis can become secondarily infected, finding pustules early in the assessment prompts the clinician to investigate bacterial invasion more thoroughly through cultures.

Choice C rationale

A sunburn appearance, characterized by diffuse erythema, can be seen in both cellulitis and various types of dermatitis, such as actinic or contact dermatitis. Because both conditions involve vasodilation and increased blood flow to the skin, redness alone is not a reliable differentiator. Cellulitis typically presents with more distinct warmth and spreading borders, but the visual similarity to a sunburn makes it a poor diagnostic marker for distinguishing between the two inflammatory states.

Choice D rationale

Dry patches are common in many dermatological conditions, particularly atopic dermatitis or eczema, where the skin barrier is chronically compromised. While they indicate altered tissue integrity, they do not specifically suggest the deep tissue inflammation and infection characteristic of cellulitis. Cellulitis is more often associated with taut, shiny, and swollen skin rather than dry, scaly patches. Therefore, observing dry patches is more helpful for identifying chronic skin conditions rather than diagnosing an acute infection.

Choice A rationale

Monitoring cardiorespiratory status is the highest priority for an electrical burn patient because electricity frequently causes cardiac arrhythmias or arrest. The heart's electrical conduction system is extremely sensitive to external currents, which can trigger ventricular fibrillation. Additionally, the path of the current can cause respiratory paralysis or delayed cardiac issues. Immediate and continuous EKG monitoring is essential to detect and treat life-threatening dysrhythmias that may not be immediately apparent upon initial physical inspection of the skin.

Choice B rationale

Assessing circulation to the extremities is important because electrical burns can cause internal tissue damage and swelling, leading to compartment syndrome. However, this is secondary to the immediate threat of cardiac arrest. While the nurse must check peripheral pulses and capillary refill to ensure the limbs are perfused, the systemic stabilization of the heart and lungs takes precedence. Compartment syndrome is a serious complication, but it develops over hours, whereas cardiac rhythm disturbances can be fatal instantly.

Choice C rationale

Evaluating electrolyte balance is necessary because extensive tissue damage from an electrical burn releases large amounts of potassium into the bloodstream, potentially causing hyperkalemia. Normal potassium ranges are 3.5 to 5.0 mEq/L. While hyperkalemia can lead to cardiac issues, the direct effect of the electrical current on the heart's conduction is the more immediate concern. Electrolyte monitoring is a vital part of the ongoing management but follows the initial assessment of the patient's active heart rhythm.

Choice D rationale

Checking for signs of infection is a long-term management goal rather than a critical aspect of the initial assessment. Infection usually takes days to develop. In the immediate aftermath of an electrical injury, the focus must be on the invisible internal damage caused by the current's path through the body. Although skin entry and exit wounds should be cleaned, the life-threatening risks are physiological and internal, necessitating a focus on vital organ function and hemodynamic stability.