Chapter 47 Assessment of endocrine System

3. A patient has a serum sodium level of 152 mEq/L (152 mmol/L). The normal hormonal response to this situation is a. release of ADH. b. release of ACTH. c. secretion of aldosterone. d. secretion of corticotropin-releasing hormone.

A

A young adult patient is being seen in the clinic with increased secretion of the anterior pituitary hormones. The nurse would expect the laboratory test results to show a. increased urinary cortisol. c. elevated serum aldosterone levels. b. decreased serum thyroxine. d. low urinary catecholamines excretion.

A) Increased secretion of adrenocorticotropic hormone (ACTH) by the anterior pituitary gland will lead to an increase in serum and urinary cortisol levels. An increase, rather than a decrease, in thyroxine level would be expected with increased secretion of thyroid-stimulating hormone (TSH) by the anterior pituitary. Aldosterone and catecholamine levels are not controlled by the anterior pituitary.

Which information about a patient who is scheduled for an oral glucose tolerance test should be reported to the health care provider before starting the test? a. The patient reports having occasional orthostatic dizziness. b. The patient takes oral corticosteroids for rheumatoid arthritis. c. The patient has had a 10-lb weight gain in the last month. d. The patient drank several glasses of water an hour previously.

ANS: B Corticosteroids can affect blood glucose results. The other information will be provided to the health care provider but will not affect the test results.

A registered nurse (RN) is caring for a patient with a goiter and possible hyperthyroidism. Which action by the RN indicates that the charge nurse needs to provide the RN with additional teaching? a. The RN checks the blood pressure in both arms. b. The RN palpates the neck to assess thyroid size. c. The RN orders saline eye drops to lubricate the patient's bulging eyes. d. The RN lowers the thermostat to decrease the temperature in the room.

ANS: B Palpation can cause the release of thyroid hormones in a patient with an enlarged thyroid and should be avoided. The other actions by the new RN are appropriate when caring for a patient with an enlarged thyroid.

Which additional information will the nurse need to consider when reviewing the laboratory results for a patient's total calcium level? a. The blood glucose b. The serum albumin c. The phosphate level d. The magnesium level

ANS: B Part of the total calcium is bound to albumin, so hypoalbuminemia can lead to misinterpretation of calcium levels. The other laboratory values will not affect total calcium interpretation.

A patient has been newly diagnosed with type 2 diabetes mellitus. Which information about the patient will be most useful to the nurse who is helping the patient develop strategies for successful adaptation to this disease? a. Ideal weight b. Value system c. Activity level d. Visual changes

ANS: B When dealing with a patient with a chronic condition such as diabetes, identification of the patient's values and beliefs can assist the interprofessional team in choosing strategies for successful lifestyle change. The other information also will be useful but is not as important in developing an individualized plan for the necessary lifestyle changes.

A patient is taking spironolactone (Aldactone), a drug that blocks the action of aldosterone on the kidney, for hypertension. The nurse will monitor for a. increased serum sodium. b. decreased urinary output. c. elevated serum potassium. d. evidence of fluid overload.

ANS: C Because aldosterone increases the excretion of potassium, a medication that blocks aldosterone will tend to cause hyperkalemia. Aldosterone also promotes the reabsorption of sodium and water in the renal tubules, so spironolactone will tend to cause increased urine output, a decreased or normal serum sodium level, and signs of dehydration.

Which question from a nurse during a patient interview will provide focused information about a possible thyroid disorder? a. "What methods do you use to help cope with stress?" b. "Have you experienced any blurring or double vision?" c. "Have you had a recent unplanned weight gain or loss?" d. "Do you have to get up at night to empty your bladder?"

ANS: C Because thyroid function affects metabolic rate, changes in weight may indicate hyperfunction or hypofunction of the thyroid gland. Nocturia, visual difficulty, and changes in stress level are associated with other endocrine disorders.

The nurse reviews a patient's glycosylated hemoglobin (A1C) results to evaluate a. fasting preprandial glucose levels. b. glucose levels 2 hours after a meal. c. glucose control over the past 90 days. d. hypoglycemic episodes in the past 3 months.

ANS: C Glycosylated hemoglobin testing measures glucose control over the last 3 months. Glucose testing before/after a meal or random testing may reveal impaired glucose tolerance and indicate prediabetes, but it is not done on patients who already have a diagnosis of diabetes. There is no test to evaluate for hypoglycemic episodes in the past.

1. A characteristic common to all hormones is that they a. circulate in the blood bound to plasma proteins. b. influence cellular activity of specific target tissues. c. accelerate the metabolic processes of all body cells. d. enter a cell to alter the cell's metabolism or gene expression.

B

2. A patient is receiving radiation therapy for cancer of the kidney. The nurse monitors the patient for signs and symptoms of damage to the a. pancreas. b. thyroid gland. c. adrenal glands. d. posterior pituitary gland.

C

3. From where is the hormone glucagon secreted? a. F cells of the islets of Langerhans b. β-cells of the islets of Langerhans c. α-cells of the islets of Langerhans d. Delta cells of the islets of Langerhans

C

4. Which endocrine gland secretes cortisol in a diurnal pattern? a. Ovaries b. Thyroid c. Adrenal cortex d. Adrenal medulla

C

6. An appropriate technique to use during physical assessment of the thyroid gland is a. asking the patient to hyperextend the neck during palpation. b. percussing the neck for dullness to define the size of the thyroid. c. having the patient swallow water during inspection and palpation of the gland. d. using deep palpation to determine the extent of a visibly enlarged thyroid gland.

C

8. What accurately demonstrates that hormones of one gland influence the function of hormones of another gland? a. Increased insulin levels inhibit the secretion of glucagon. b. Increased cortisol levels stimulate the secretion of insulin. c. Increased testosterone levels inhibit the release of estrogen. d. Increased atrial natriuretic peptide (ANP) levels inhibit the secretion of aldosterone.

D

4. All cells in the body are believed to have intracellular receptors for a. insulin. b. glucagon. c. growth hormone. d. thyroid hormone.

D

17) A patient has a low serum T3 level. The HCP orders measurement of the TSH level. If the TSH level is elevated, what does this indicate? a. The cause of the low T3 level is most likely primary hypothyroidism. b. The negative feedback system is failing to stimulate the anterior pituitary gland. c. The patient has an underactive thyroid gland that is not receiving TSH stimulation. d. A tumor on the anterior pituitary gland that is causing increased production of TSH.

A

5. When obtaining subjective data from a patient during assessment of the endocrine system, the nurse asks specifically about a. energy level. b. intake of vitamin C. c. employment history. d. frequency of sexual intercourse.

A

7. Endocrine disorders often go unrecognized in the older adult because a. symptoms are often attributed to aging. b. older adults rarely have identifiable symptoms. c. endocrine disorders are relatively rare in the older adult. d. older adults usually have subclinical endocrine disorders that minimize symptoms.

A

9. A patient has a total serum calcium level of 3 mg/dL (1.5 mEq/L). If this finding reflects hypoparathyroidism, the nurse would expect further diagnostic testing to reveal a. decreased serum PTH. b. increased serum ACTH. c. increased serum glucose. d. decreased serum cortisol levels.

A

In a patient with an elevated serum cortisol, what should the nurse expect other laboratory findings to reveal? a. Hypokalemia b. Hyponatremia c. Hypoglycemia d. Decreased serum triglycerides

A

What are two effects of hypokalemia on the endocrine system? a. Decreased insulin and aldosterone release b. Decreased glucagon and increased cortisol release c. Decreased release of ANP and increased ADH release d. Decreased release of parathyroid hormone and increased calcitonin release

A

The nurse is caring for a 63-yr-old with a possible pituitary tumor who is scheduled for a computed tomography scan with contrast. Which information about the patient is important to discuss with the health care provider before the test? a. History of renal insufficiency b. Complains of chronic headache c. Recent bilateral visual field loss d. Blood glucose level of 134 mg/dL

ANS: A Because contrast media may cause acute kidney injury in patients with poor renal function, the health care provider will need to prescribe therapies such as IV fluids to prevent this complication. The other findings are consistent with the patient's diagnosis of a pituitary tumor.

The nurse is caring for a 45-yr-old male patient during a water deprivation test. Which finding is most important for the nurse to communicate to the health care provider? a. The patient complains of intense thirst. b. The patient has a 5-lb (2.3-kg) weight loss. c. The patient's urine osmolality does not increase. d. The patient feels dizzy when sitting on the edge of the bed.

ANS: B A drop in the weight of more than 2 kg indicates severe dehydration, and the test should be discontinued. The other assessment data are not unusual with this test.

13. What manifestations of endocrine problems in the older adult are commonly attributed to the aging process? a. Tremors and paresthesias b. Fatigue and mental impairment c. Hyperpigmentation and oily skin d. Fluid retention and hypertension

B

During the nurse's physical examination of a young adult, the patient's thyroid gland cannot be felt. The most appropriate action by the nurse is to a. palpate the patient's neck more deeply. b. document that the thyroid was nonpalpable. c. notify the health care provider immediately. d. teach the patient about thyroid hormone testing.

ANS: B The thyroid is frequently nonpalpable. The nurse should simply document the finding. There is no need to notify the health care provider immediately about a normal finding. There is no indication for thyroid-stimulating hormone (TSH) testing unless there is evidence of thyroid dysfunction. Deep palpation of the neck is not appropriate.

Which statement by a 50-yr-old female patient indicates to the nurse that further assessment of thyroid function may be necessary? a. "I notice my breasts are tender lately." b. "I am so thirsty that I drink all day long." c. "I get up several times at night to urinate." d. "I feel a lump in my throat when I swallow."

ANS: D Difficulty in swallowing can occur with a goiter. Nocturia is associated with diseases such as diabetes mellitus, diabetes insipidus, or chronic kidney disease. Breast tenderness would occur with excessive gonadal hormone levels. Thirst is a sign of disease such as diabetes.

A 61-yr-old female patient admitted with pneumonia has a total serum calcium level of 13.3 mg/dL (3.3 mmol/L). The nurse will anticipate the need to teach the patient about testing for _____ levels. a. calcitonin b. catecholamine c. thyroid hormone d. parathyroid hormone

ANS: D Parathyroid hormone (PTH) is the major controller of blood calcium levels. Although calcitonin secretion is a countermechanism to PTH, it does not play a major role in calcium balance. Catecholamine and thyroid hormone levels do not affect serum calcium level.

7. What is released in the normal response to increased serum osmolality? a. Aldosterone from the adrenal cortex, which stimulates sodium excretion by the kidney b. ADH from the posterior pituitary gland, which stimulates the kidney to reabsorb water c. Mineralocorticoids from the adrenal gland, which stimulate the kidney to excrete potassium d. Calcitonin from the thyroid gland, which increases bone resorption and decreases serum calcium levels

B

Common nonspecific manifestations that may alert the nurse to endocrine dysfunction include a. goiter and alopecia. b. exophthalmos and tremors. c. weight loss, fatigue, and depression. d. polyuria, polydipsia, and polyphagia.

C

To ensure accurate results of a fasting blood glucose analysis, the nurse instructs the patient to fast for at least how long? a. 2 hours c. 8 hours b. 4 hours d. 12 hours

C

What is a potential adverse effect of palpation of an enlarged thyroid gland? a. Carotid artery obstruction b. Damage to the cricoid cartilage c. Release of excessive thyroid hormone into circulation d. Hoarseness from pressure on the recurrent laryngeal nerve

C

9. How do hormones respond following the ingestion of a high-protein, carbohydrate-free meal? a. Both insulin and glucagon are inhibited because blood glucose levels are unchanged. b. Insulin is inhibited by low glucose levels, and glucagon is released to promote gluconeogenesis. c. Insulin is released to facilitate the breakdown of amino acids into glucose, and glucagon is inhibited. d. Glucagon is released to promote gluconeogenesis, and insulin is released to facilitate movement of amino acids into muscle cells.

D

The female patient is admitted with a new diagnosis of Cushing syndrome with elevated serum and urine cortisol levels. Which assessment findings should the nurse expect to see in this patient? a. Hair loss and moon face b. Decreased weight and hirsutism c. Decreased muscle mass and thick skin d. Elevated blood pressure and blood glucose

D

The patient with type 1 diabetes mellitus is in the clinic to check his long-term glycemic control. Which test should be used? a. Water deprivation test b. Fasting blood glucose test c. Oral glucose tolerance test d. Glycosylated hemoglobin (A1C)

D

Which statement about the adrenal medulla hormones is accurate? a. Overproduction of androgens may cause masculinization in women. b. Both the adrenal medulla and the thyroid gland have a negative feedback system to the hypothalamus. c. Cortisol levels would be altered in a person who normally works a night shift from 11:00 PM to 7:00 AM and sleeps from 8:00 AM to 3:00 PM. d. Catecholamines are considered hormones when they are secreted by the adrenal medulla and neurotransmitters when they are secreted by nerve cell

D

A patient with a possible pituitary adenoma is scheduled for a computed tomography (CT) scan with contrast media. Which patient information is important for the nurse to communicate to the health care provider before the test? a. Bilateral poor peripheral vision b. Allergies to iodine and shellfish c. Recent weight loss of 20 lb d. Complaint of ongoing headaches

ANS: B Because the usual contrast media is iodine-based, the health care provider will need to know about the allergy before the CT scan. The other findings are common with any mass in the brain such as a pituitary adenoma.

A patient seen in the emergency department for severe headache and acute confusion has a serum sodium level of 118 mEq/L. The nurse will anticipate the need for which diagnostic test? a. Urinary 17-ketosteroids b. Antidiuretic hormone level c. Growth hormone stimulation test d. Adrenocorticotropic hormone level

ANS: B Elevated levels of antidiuretic hormone will cause water retention and decrease serum sodium levels. The other tests would not be helpful in determining possible causes of the patient's hyponatremia.

The nurse will teach a patient who is scheduled to complete a 24-hour urine collection for 17-ketosteroids to a. insert and maintain a retention catheter. b. keep the specimen refrigerated or on ice. c. drink at least 3 L of fluid during the 24 hours. d. void and save that specimen to start the collection.

ANS: B The specimen must be kept on ice or refrigerated until the collection is finished. Voided or catheterized specimens are acceptable for the test. The initial voided specimen is discarded. There is no fluid intake requirement for the 24-hour collection.

Which laboratory value should the nurse review to determine whether a patient's hypothyroidism is caused by a problem with the anterior pituitary gland or with the thyroid gland? a. Thyroxine (T4) level b. Triiodothyronine (T3) level c. Thyroid-stimulating hormone (TSH) level d. Thyrotropin-releasing hormone (TRH) level

ANS: C A low TSH level indicates that the patient's hypothyroidism is caused by decreased anterior pituitary secretion of TSH. Low T3and T4 levels are not diagnostic of the primary cause of the hypothyroidism. TRH levels indicate the function of the hypothalamus.

A patient will be scheduled in the outpatient clinic for blood cortisol testing. Which instruction will the nurse provide? a. "Avoid adding any salt to your foods for 24 hours before the test." b. "You will need to lie down for 30 minutes before the blood is drawn." c. "Come to the laboratory to have the blood drawn early in the morning." d. "Do not have anything to eat or drink before the blood test is obtained."

ANS: C Cortisol levels are usually drawn in the morning, when levels are highest. The other instructions would be given to patients who were having other endocrine testing.

The nurse will plan to teach a patient to minimize physical and emotional stress while the patient is undergoing a. a water deprivation test. b. testing for serum T3 and T4 levels. c. a 24-hour urine test for free cortisol. d. a radioactive iodine (I-131) uptake test.

ANS: C Physical and emotional stress can affect the results of the free cortisol test. The other tests are not impacted by stress.

16. A patient is admitted with tetany. Which laboratory value should the nurse plan to monitor? a. Total protein b. Blood glucose c. Ionized calcium d. Serum phosphate

ANS: C Tetany is associated with hypocalcemia. The other values would not be useful for this patient.

An 18-yr-old male patient with small stature is scheduled for a growth hormone stimulation test. In preparation for the test, the nurse will obtain a. ice in a basin. b. glargine insulin. c. a cardiac monitor. d. 50% dextrose solution.

ANS: D Hypoglycemia is induced during the growth hormone stimulation test, and the nurse should be ready to administer 50% dextrose immediately. Regular insulin is used to induce hypoglycemia (glargine is never given IV). The patient does not require cardiac monitoring during the test. Although blood samples for some tests must be kept on ice, this is not true for the growth hormone stimulation test.