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?

Thyroxine (T4) level

Triiodothyronine (T3) level

Thyroid stimulating hormone (TSH) level

Glucose level

Answer and Explanation

The Correct Answer is C

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.

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Correct Answer is A

Explanation

Choice A reason: A fruity odor in the breath is a symptom of hyperglycemia, especially when it is severe and causes ketoacidosis. Ketoacidosis is a condition where the body produces ketones, which are acidic substances that result from the breakdown of fat for energy when there is not enough insulin or glucose available. Ketones can make the breath smell fruity or like nail polish remover.

Choice B reason: A decreased appetite is not a symptom of hyperglycemia. On the contrary, an increased appetite or hunger is a symptom of hyperglycemia, as the body tries to compensate for the lack of glucose in the cells by stimulating the hunger center in the brain.

Choice C reason: An increased thirst is a symptom of hyperglycemia, as the body tries to ﬂush out the excess glucose and ketones in the blood through urine. This leads to dehydration and thirst signals in the brain.

Choice D reason: A blurry vision at times is a symptom of hyperglycemia, as high blood glucose levels can cause swelling and damage to the lens of the eye, aﬀecting its ability to focus light properly. This can lead to temporary or permanent vision problems.

A. Blurred vision B. Bradycardia C. Insomnia D. Moist skin

Correct Answer is B

Explanation

Choice A: Blurred vision is not a typical finding of hypothyroidism. It can be caused by other conditions, such as diabetes, glaucoma, or eye strain.

Choice B: Bradycardia is a slow heart rate, usually below 60 beats per minute. This is a common finding of hypothyroidism, as the thyroid hormone regulates the metabolic rate and aﬀects the cardiovascular system. Low levels of thyroid hormone can cause the heart to beat slower and weaker.

Choice C: Insomnia is difficulty falling or staying asleep. This is not a common finding of hypothyroidism, as low thyroid hormone levels can cause fatigue, lethargy, and excessive sleepiness.

Choice D: Moist skin is not a common finding of hypothyroidism, as low thyroid hormone levels can cause dry skin, hair loss, and britle nails. Moist skin can be a sign of hyperthyroidism, which is the opposite condition of hypothyroidism.

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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?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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Explanation

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Correct Answer is B

Explanation

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