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Case Study

Exhibits
What is the expected therapeutic effect of radioactive lodine therapy in hyperthyroidism?

A.

Increase TSH levels

B.

Prevent thyroid cancer

C.

Destroy overactive thyroid tissue

D.

Stimulate thyroid hormone production

Answer and Explanation

The Correct Answer is C

A. Increase TSH levels: Radioactive iodine therapy works by destroying overactive thyroid tissue, which will eventually lead to a decrease in T3 and T4 levels. As a result, TSH levels may rise in response to reduced thyroid function. However, increasing TSH levels is not the direct therapeutic effect of the iodine itself.

B. Prevent thyroid cancer: Radioactive iodine therapy is used to treat hyperthyroidism, not to prevent thyroid cancer. It is not a preventive treatment for cancer, but rather a way to manage an overactive thyroid.

C. Destroy overactive thyroid tissue: Radioactive iodine (I-131) is used to destroy overactive thyroid tissue in Graves' disease, which helps to reduce the production of thyroid hormones. Over time, the thyroid tissue absorbs the iodine, leading to reduced thyroid function.

D. Stimulate thyroid hormone production: Radioactive iodine works to destroy thyroid tissue and decrease thyroid hormone production, not to stimulate it. The goal is to reduce the excessive production of T3 and T4.


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Related Questions

Correct Answer is C

Explanation

A. He has already received insulin: While Jacob uses an insulin pump, the immediate issue is severe hypoglycemia. Whether he recently received insulin or not, the priority is to raise his blood sugar. Insulin doesn't preclude oral glucose if the patient is conscious and able to swallow safely.

B. Oral glucose is too slow to act: Oral glucose acts quickly when absorbed, but it is not the preferred option in this situation due to the patient's unconsciousness. Intramuscular glucagon acts more rapidly and is safer for immediate administration.

C. He is unconscious and at risk for aspiration: Since Jacob is unconscious, he is at high risk for aspiration if he were given oral glucose. In such cases, the intramuscular administration of glucagon is preferred to quickly raise blood glucose and avoid the risk of choking or aspiration.

D. He is allergic to glucose: There is no indication in the patient's profile that he has an allergy to glucose, and it would be uncommon for someone with diabetes to be allergic to glucose. The primary concern here is his unconsciousness, not an allergy.

Correct Answer is C

Explanation

A. With food: Levothyroxine should not be taken with food because it can interfere with the absorption of the medication. Food, especially high-fiber meals, can reduce the effectiveness of levothyroxine.

B. With milk: Milk contains calcium, which is known to interfere with the absorption of levothyroxine. Taking the medication with milk would reduce its effectiveness and could necessitate a higher dose, or lead to fluctuations in thyroid hormone levels.

C. On an empty stomach: Levothyroxineshould be taken on an empty stomach, typically 30 to 60 minutes beforeeating or drinking anything, except water, to ensure optimal absorption and effectiveness.

D. With fruit juice: Fruit juice is not ideal for taking levothyroxine, as it can also affect absorption, especially grapefruit juice. It is best to take the medication with water only.

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