The nurse is caring for a client with hypothyroidism who has a history of myocardial infarction and heart failure.
What thyroid replacement drug would the nurse expect to be ordered?
Levothyroxine.
Thyroid desiccated.
Methimazole.
Liothyronine.
The Correct Answer is A
Levothyroxine is a synthetic form of thyroxine, the hormone that the thyroid gland normally produces. It is used to treat hypothyroidism by replacing the missing hormone and restoring the normal metabolism.
Some explanations for the other choices are:
• Choice B. Thyroid desiccated is a natural thyroid hormone derived from animal thyroid glands.
It contains both T4 and T3 hormones, which may cause side effects or complications in some people with hypothyroidism. It is not recommended as a first-line treatment for hypothyroidism.
• Choice C. Methimazole is an antithyroid drug that blocks the production of thyroid hormones.
It is used to treat hyperthyroidism, not hypothyroidism. Giving methimazole to someone with hypothyroidism would worsen their condition.
• Choice D. Liothyronine is a synthetic form of T3, the active thyroid hormone.
It is sometimes used in combination with levothyroxine to treat hypothyroidism, but it is not a standard treatment. It has a shorter half-life and more variable effects than levothyroxine, and it may increase the risk of cardiac arrhythmias or osteoporosis.
Normal ranges for thyroid function tests vary depending on the laboratory and the method used, but generally they are:
• TSH: 0.4 to 4.0 mIU/L
• Free T4: 0.8 to 2.0 ng/dL
• Free T3: 2.3 to 4.2 pg/mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
The nurse would assess these factors to determine the need for therapy. Some possible explanations for the other choices are:
Choice A. Number of times client’s family reports the client is nauseated.
This is not a reliable indicator of the severity or cause of nausea and vomiting.
The nurse should assess the client directly and not rely on the family’s reports.
Choice B. How well the client is eating.
This is not a specific or objective measure of nausea and vomiting.
The client may have other reasons for not eating well, such as loss of appetite, taste changes, or pain.
The nurse should also monitor the client’s weight, hydration status, and electrolyte levels.
Choice D. Client’s nutritional status and fluid balance.
These are important aspects of the client’s overall health, but they are not directly related to nausea and vomiting.
The nurse should assess these factors as part of the comprehensive care plan, but they are not sufficient to determine the need for therapy.
Correct Answer is C
Explanation
This is because cortisol exhibits a proper 24-h circadian rhythm that affects the cardiovascular system and other organs. Cortisol levels are normally low at the beginning of sleep and high at the moment of awakening. Taking corticosteroids at this time mimics the natural cortisol rhythm and may reduce side effects such as adrenal suppression, sleep disturbances and cardiovascular complications.
Choice A is wrong because taking corticosteroids at 08:00 may not coincide with the client’s natural cortisol peak and may cause insomnia or unpleasant dreams.
Choice B is wrong because taking corticosteroids at 22:00 may disrupt the client’s sleep quality and increase the risk of nocturnal hypertension.
Choice D is wrong because taking corticosteroids at 16:00 may interfere with the client’s natural cortisol decline and cause hyperglycemia or dyslipidemia.
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