A nurse is reviewing the medical record of a client who has hyperthyroidism (Graves disease). Which of the following serum laboratory findings should the nurse expect to be below the expected reference range?

Choice A: Thyroxine (T4) level. This is incorrect because T4 is one of the thyroid hormones that is increased in hyperthyroidism. T4 is produced by the thyroid gland and converted to T3 in the tissues. A high level of T4 indicates overactivity of the thyroid gland.1

Choice B: Triiodothyronine (T3) level. This is incorrect because T3 is another thyroid hormone that is increased in hyperthyroidism. T3 is the more active form of thyroid hormone and regulates the metabolism of cells. A high level of T3 indicates overactivity of the thyroid gland.1

Choice C: Thyroid stimulating hormone (TSH) level. This is correct because TSH is a hormone that stimulates the thyroid gland to produce T4 and T3. TSH is produced by the pituitary gland and regulated by a feedback mechanism. When the levels of T4 and T3 are high, the pituitary gland reduces the secretion of TSH to inhibit further production of thyroid hormones. Therefore, a low level of TSH indicates hyperthyroidism.1

Choice D: Glucose level. This is incorrect because glucose level is not directly related to thyroid function. However, hyperthyroidism can affect glucose metabolism and cause increased blood sugar levels due to increased breakdown of glycogen and glucose uptake by cells. Therefore, glucose level may be elevated in some cases of hyperthyroidism, but it is not a specific indicator.

Choice A: “I put lotion between my toes.” This is incorrect because putting lotion between the toes can create a moist environment that promotes fungal growth and infection. The client should apply lotion to the tops and botoms of the feet, but avoid the areas between the toes.

Choice B: “I check my feet every day for sores and bruises.” This is correct because checking the feet every day for any signs of injury, infection, or ulceration is an important part of foot care for a client who has diabetes mellitus. The client should also report any problems to the provider and seek prompt treatment.

Choice C: “I wear sandals in warm weather.” This is incorrect because wearing sandals can expose the feet to injury, sunburn, or insect bites. The client should wear closed-toe shoes that fit well and protect the feet from trauma and environmental hazards.

Choice D: “I soak my feet in warm, soapy water every night before I go to bed.” This is incorrect because soaking the feet can cause maceration of the skin and increase the risk of infection. The client should wash the feet with mild soap and warm water, but not soak them. The client should also dry the feet thoroughly, especially between the toes.