A nurse is caring for a patient who is experiencing respiratory distress.
Which of the following early manifestations of hypoxemia should the nurse recognize?

Choice A rationale

Fragrances in cosmetics and personal care products are common causes of allergic contact dermatitis. These are often complex mixtures of chemical allergens that can trigger a T-cell mediated immune response, leading to a delayed-type hypersensitivity reaction. Avoiding products containing these known irritants is a key preventative strategy to reduce the frequency and severity of future episodes.

Choice B rationale

Washing the skin with very hot water is detrimental to the skin's barrier function. Hot water strips the skin of its natural oils (sebum), leading to excessive dryness and micro-fissures. This compromised skin barrier makes the skin more permeable to allergens and irritants, exacerbating existing dermatitis and increasing susceptibility to future episodes. The skin should be cleansed with lukewarm water.

Choice C rationale

Wearing gloves constantly, especially those made of latex or vinyl, can create a moist environment that traps sweat and irritants, leading to maceration and irritation of the skin. This can worsen existing dermatitis and potentially cause a new form of contact dermatitis. Gloves should only be worn for specific tasks and for limited periods to prevent this moisture-induced skin damage.

Choice D rationale

Fabric softeners often contain chemicals and fragrances that are known contact allergens and irritants. These substances can remain in the clothing fibers after washing and come into direct contact with the skin, triggering a hypersensitivity reaction. Therefore, the nurse should advise against using fabric softeners to reduce exposure to potential allergens and prevent future episodes of contact dermatitis.

Choice A rationale

Psoriasis is a chronic, autoimmune skin disorder characterized by the rapid overproduction of skin cells, leading to the formation of thick, red plaques covered with silvery-white scales. These lesions are a result of keratinocyte proliferation and inflammation. The most common sites for these plaques are the extensor surfaces of the body, such as the scalp, knees, and elbows, due to repetitive trauma or friction (Koebner phenomenon).

Choice B rationale

Red-purplish scaly lesions are more characteristic of other inflammatory skin conditions, such as lichen planus, not psoriasis. Psoriasis typically presents with a well-demarcated, erythematous base covered by silvery-white scales. The color and scale characteristics are key differentiators in the clinical diagnosis of skin disorders.

Choice C rationale

Psoriasis is typically associated with dry, not oily, skin. The rapid cell turnover and scale formation lead to significant epidermal dryness. Furthermore, pruritus (itching) is a common symptom of psoriasis, often a major source of discomfort for patients. The absence of pruritus is not a characteristic of this condition.

Choice D rationale

Nail changes are a very common manifestation of psoriasis, affecting up to 50% of patients. These changes include pitting, discoloration, onycholysis (separation of the nail from the nail bed), and thickening. Clear, thin nail beds are a sign of healthy nails, not a characteristic finding in a patient with psoriasis.