LA#3 (Endocrine) Chapters 50, 51, 52 in Med Surg Flashcards
When evaluating the laboratory findings of a patient with increased secretion of the anterior pituitary hormones, what would the nurse expect to find?
a. Increased urinary free cortisol
b. Decreased serum thyroxine (T4) levels
c. Low urinary excretion of catecholamines
d. Increased serum aldosterone levels
ANS: A
Increased secretion of adrenocorticotropic hormone by the anterior pituitary gland will lead to an increase in serum and urinary cortisol levels.
When obtaining the health history, which of the following statements by a patient indicates that the nurse should assess further for a possible problem with the thyroid gland?
a. “I have noticed difficulty in swallowing.”
b. “I get up several times at night to urinate.”
c. “I have noticed my breasts are tender lately.”
d. “I drink about 6 L of water a day.”
ANS: A
Difficulty swallowing can occur with a goitre.
What is the most common type of feedback system in the regulation of hormones?
a. Negative
b. Positive
c. Complex
d. Chemical
ANS: A
The most common type of feedback system is negative feedback, in which the gland responds by increasing or decreasing the secretion of a hormone on the basis of feedback from various factors (e.g., insulin).
During a patient assessment, which of the following is a question the nurse can ask that addresses thyroid function?
a. “Do you have to get up at night to urinate?”
b. “Have you experienced any blurring or double vision?”
c. “Do you experience fatigue even if you have slept a long time?”
d. “Can you describe the amount of stress you have at home and work?”
ANS: C
Fatigue may be a sign of hypothyroidism.
The physician has ordered a serum cortisol level to rule out adrenal dysfunction in a patient who is a night security guard who works from 2300 hours to 0700 hours and normally sleeps from 0800 hours to 1600 hours. To ensure the most reliable test results, when does the nurse arrange the blood specimen to be drawn?
a. At 0300 hours
b. At 2300 hours
c. In the early morning
d. In the late afternoon
ANS: D
Cortisol levels are usually drawn in the morning, when levels are highest. In a patient who sleeps during the day, the highest level would be soon after awakening in the late afternoon.
A patient has a total serum calcium level of 3.3 mmol/L (13.3 mg/dL; 6.7 mEq/L). The nurse understands that this level of calcium normally does which of the following?
a. Indicates hypothyroidism
b. Stimulates the secretion of calcitonin
c. Occurs when the parathyroid gland is surgically removed
d. Can be caused by oversecretion of calcitonin from the thyroid gland
ANS: B
Calcitonin is secreted by the C cells of the thyroid gland in response to elevated blood calcium levels.
Which action taken by a nursing student when caring for a patient with thyroiditis and a goitre requires that the supervising nurse intervene immediately?
a. The student nurse checks the blood pressure on both arms.
b. The student nurse lowers the thermostat to decrease the temperature in the room.
c. The student nurse palpates the neck to check thyroid size.
d. The student nurse orders nonmedicated eyedrops to lubricate the patient’s eyes.
ANS: C
Palpation can cause the release of thyroid hormones in a patient with an enlarged thyroid and should be avoided.
During a physical examination, the nurse finds that a patient’s thyroid gland cannot be palpated. What does the nurse interpret this finding as?
a. A normal finding
b. Evidence of an atrophied thyroid gland
c. Insignificant in a patient with elevated triiodothyronine (T3) and T4 levels
d. Abnormal, and confirmation of the finding by another experienced health care provider is necessary
ANS: A
The thyroid is frequently nonpalpable. The nurse should simply document the finding.
Which hormone is an example of positive feedback in the regulation of hormonal secretion?
a. Insulin
b. Oxytocin
c. Thyroid-stimulating hormone (TSH)
d. Thyroid-releasing hormone
ANS: B
An example of a positive-feedback hormone is oxytocin during the birth process. Insulin is an example of a negative-feedback hormone. Thyroid hormones are an example of complex feedback.
When working with a patient who has diabetes mellitus, the nurse uses the results of testing for glycosylated hemoglobin to evaluate which of the following?
a. Glucose levels 2 hours after a meal
b. Glucose control over the past 3 months
c. Circulating, nonfasting glucose levels
d. Episodes of hypoglycemia in the past 2 months
ANS: B
Glycosylated hemoglobin testing measures glucose control over the last 3 months.
Which of the following is an age-related change affecting the endocrine system?
a. Increase in TSH secretion
b. Decreased parathyroid secretion
c. Increased glucose intolerance
d. Decreased secretion of norepinephrine
ANS: C
A normal age-related change in assessment findings of the endocrine system is an increased glucose intolerance leading to a decreased sensitivity to insulin.
A patient is scheduled for a growth hormone (GH) stimulation test. In preparation for the test, which of the following will the nurse obtain?
a. Vial of 50% dextrose solution
b. Vial of glargine insulin
c. Cardiac monitor
d. Basin of ice
ANS: A
Hypoglycemia is induced during the GH stimulation test, and the nurse should be ready to administer 50% dextrose immediately.
To confirm the diagnosis of reactive hypoglycemia in a patient experiencing symptoms of the disorder, the nurse would expect the patient to be scheduled for which of the following tests?
a. Fasting blood glucose test
b. 2-hour glucose tolerance test
c. 5-hour glucose tolerance test
d. 24-hour urine test for glucose and ketones
ANS: C
Patients with reactive hypoglycemia have adrenergic symptoms and glucose levels less than 3.3 mmol/L with a 5-hour glucose tolerance test.
Which of the following factors stimulates the secretion of insulin?
a. Decreased glucose levels
b. Increased somatostatin levels
c. Decreased amino acid levels
d. Increased vagal stimulation
ANS: D
Increased vagal stimulation is a factor that will stimulate the secretion of insulin. All of the others inhibit the secretion of insulin.
When the nurse is describing the effects of insulin on the body to a patient newly diagnosed with diabetes mellitus, which of the following is the best explanation?
a. “Insulin promotes the breakdown of fatty tissue into triglycerides, which can be used for energy.”
b. “When proteins are taken into the body, insulin promotes their breakdown and conversion to fats.”
c. “Insulin stimulates the conversion of stored sugars into blood glucose and the conversion of proteins into glucose.”
d. “When carbohydrates, fats, and proteins are eaten, insulin promotes cellular transport and storage of all these nutrients.”
ANS: D
Insulin is an anabolic hormone that assists with the transport of nutrients into cells and their synthesis into glycogen, triglycerides, and proteins.
Use of nursing interventions to decrease the patient’s physical and emotional stress is most important when the patient is undergoing which of the following tests?
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 uptake test
ANS: C
Physical and emotional stress can affect the results for the free cortisol test. The other tests are not impacted by stress.
A patient is scheduled for a 24-hour urine collection for 17-ketosteroids. The nurse will plan to do which of the following?
a. Insert a retention catheter.
b. Keep the specimen on ice.
c. Have the patient void and save that specimen to start the collection.
d. Encourage the patient to drink 2 to 3 L of fluid during the 24 hours.
ANS: B
The specimen must be kept on ice or refrigerated until the collection is finished.
When caring for a patient having a water deprivation test, which assessment obtained by the nurse will be of greatest concern?
a. The patient complains of intense thirst.
b. The patient has experienced a 2.5-kg weight loss.
c. The patient feels dizzy when sitting up on the edge of the bed.
d. The patient’s urine osmolality does not change after antidiuretic hormone is given.
ANS: B
A drop in the weight of more than 2 kg indicates severe dehydration, and the test should be discontinued.
Which of the following is a common characteristic of most hormones?
a. Secretion at unpredictable rates
b. Circulation through the blood
c. Binding to receptors only on the cell membrane
d. Binding only to receptors within the cell
ANS: B
Most hormones have three common characteristics: secretion in small amounts at variable but predictable rates, circulation through the blood, and binding to specific receptors in the cell membrane or within the cell.
A patient seeks care at the clinic because of increasing speech difficulties and hoarseness, telling the nurse his tongue has gotten so big that he can hardly talk. The physician suspects acromegaly. During the nursing history, which of the following should the nurse specifically ask the patient whether he has experienced?
a. A recent head injury
b. An increase in shoe size
c. A family history of endocrine problems
d. Symptoms of hypoglycemia, such as hunger and nervousness
ANS: B
Acromegaly causes an enlargement of the hands and feet.
During preoperative teaching for a patient scheduled for transsphenoidal hypophysectomy for treatment of a pituitary adenoma, what should the nurse instruct the patient that she will have to do?
a. Take replacement growth hormone for the rest of her life
b. Not brush her teeth for at least 10 days after the surgery
c. Be expected to cough and breathe deeply every 2 hours postoperatively
d. Be positioned flat in bed with sandbags at her head to prevent head movement
ANS: B
To avoid disruption of the suture line, the patient should avoid brushing the teeth for 10 days after surgery.
Following a transsphenoidal resection of a pituitary tumour, the nurse suspects that the patient has developed diabetes insipidus on finding which of the following data?
a. A urine specific gravity of 1.001
b. A consistent rise in blood pressure
c. Fluid retention with dependent edema
d. A serum sodium of 130 mmol/L
ANS: A
After pituitary surgery, the patient is at risk for diabetes insipidus caused by cerebral edema, and monitoring of urinary output and urine specific gravity is essential.
A patient is suspected of having a pituitary tumour causing panhypopituitarism. During assessment of the patient, the nurse would expect to find which of the following changes?
a. Elevated plasma glucose levels and dyslipidemia
b. Changes in secondary sex characteristics and loss of libido
c. Hypertension resulting from increased water reabsorption in the kidney
d. Evidence of hypofunction of the adrenal, thyroid, and parathyroid glands
ANS: B
Changes in secondary sex characteristics are associated with decreases in follicle-stimulating hormone and luteinizing hormone. Fasting hypoglycemia and hypotension occur in panhypopituitarism as a result of decreases in adrenocorticotropic hormone and cortisol.
Which of the following effects on the cardiovascular system would a patient with a hypofunction of the parathyroid gland most likely exhibit?
a. Hypertension
b. Increased cardiac output
c. Decreased contractility of heart muscle
d. Dysrhythmias
ANS: C
A patient with a hypofunction of their parathyroid gland would most likely exhibit a decrease in the contractibility of their heart muscle.
A patient with an antidiuretic hormone (ADH)–secreting small cell cancer of the lung is treated to control the symptoms of syndrome of inappropriate ADH (SIADH). The nurse determines that treatment is effective on finding which of the following data?
a. The patient’s weight is stable.
b. The urine specific gravity is increased.
c. The patient’s urinary output is increased.
d. The patient’s edema is reduced.
ANS: C
Treatment is aimed at blocking the action of ADH on the renal tubules, causing an increase in urinary output.
When teaching a patient with chronic SIADH about long-term management of the disorder, the nurse determines that additional instruction is needed when the patient gives which of the following responses?
a. “I need to maintain a sodium-restricted diet at home.”
b. “I should weigh myself daily and report a sudden loss or gain.”
c. “I need to limit my fluid intake to no more than 950 mL of liquids a day.”
d. “I will eat foods high in potassium because the diuretics cause potassium loss.”
ANS: A
Patients with SIADH are at risk for hyponatremia, and a sodium supplement may be prescribed; therefore, more teaching would be required to the patient who indicated that he or she would have to maintain a sodium-restricted diet.
A 73-year-old woman is hospitalized with possible SIADH. She is confused and reports a headache, muscle cramps, and twitching. Initially, which of the following laboratory results would the nurse expect to find?
a. Hematocrit of 0.52 (52%)
b. Blood urea nitrogen of 7.9 mmol/L (22 mg/dL)
c. Serum sodium of 124 mmol/L
d. Serum chloride of 111 mmol/L
ANS: C
When water is retained, the serum sodium level will drop below normal, causing the clinical manifestations reported by the patient.
A patient with symptoms of diabetes insipidus is admitted to the hospital for evaluation and treatment of the condition. What is an appropriate nursing diagnosis that the nurse would document for the patient based on an understanding of this condition?
a. Disturbed sleep pattern related to nocturia
b. Risk for impaired skin integrity related to edema
c. Excess fluid volume related to intake greater than output
d. Activity intolerance related to muscle cramps and weakness
ANS: A
Nocturia occurs as a result of the polyuria caused by diabetes insipidus, which leads to a disturbed sleep pattern.
Which information obtained when caring for a patient who has just been admitted for evaluation of diabetes insipidus will be of greatest concern to the nurse?
a. Has a urinary output of 800 mL/hour
b. Has a urine specific gravity of 1.003
c. Had a recent head injury
d. Is confused and lethargic
ANS: D
Patients with diabetes insipidus compensate for fluid losses by drinking copious amounts of fluids, but a patient who is lethargic will be unable to drink enough fluids and will become hypovolemic.
When teaching a patient newly diagnosed with Graves’ disease about the disorder, the nurse explains which of the following?
a. Restriction of iodine intake is needed to reduce thyroid activity.
b. Exercise is contraindicated to avoid increasing the metabolic rate.
c. Surgery will eventually be required to remove the thyroid gland.
d. Antithyroid medications may take several weeks to have an effect.
ANS: D
Improvement usually begins in 1 to 2 weeks, with good results at 4 to 8 weeks.
Which one of the following effects on the integumentary system would a patient with a hyperfunction of the parathyroid gland most likely exhibit?
a. Lack of tooth enamel
b. Hair loss on scalp and body
c. Brittle nails
d. Moist skin
ANS: D
A patient with a hyperfunction of the parathyroid gland would most likely exhibit the integumentary change of moist skin and skin necrosis. The other choices are symptoms of hypofunction of the parathyroid gland.
During the nursing assessment of a patient with Graves’ disease, the nurse notes a bounding, rapid pulse and systolic hypertension. What is an additional manifestation of the disorder that the nurse would expect to find?
a. Chest pain
b. Constipation
c. Decreased appetite
d. Muscle aches
ANS: A
Angina is a possible complication of Graves’ disease, especially for a patient with tachycardia and hypertension; therefore, the nurse would expect to assess the patient for chest pain.
While assessing a patient who has just arrived in the postanaesthesia recovery unit after a thyroidectomy, the nurse obtains the following data. Which information is most important to communicate to the surgeon?
a. Complaining of level 7 incisional pain on a 10-point scale
b. Cardiac monitor showing a heart rate of 112 beats/min
c. Increasing swelling of the neck
d. A weak, hoarse voice
ANS: C
The neck swelling may lead to respiratory difficulty, and rapid intervention is needed to prevent airway obstruction.
A few hours after returning to the surgical nursing unit, a patient who has undergone a subtotal thyroidectomy develops laryngeal stridor and a cramp in the right hand. What intervention would the nurse anticipate?
a. An immediate tracheostomy
b. Administration of intravenous morphine
c. Administration of intravenous calcium gluconate
d. Endotracheal intubation with mechanical ventilation
ANS: C
The patient’s clinical manifestations are consistent with tetany caused by hypocalcemia resulting from damage to the parathyroid glands during surgery
The nurse identifies a nursing diagnosis of risk for injury: corneal ulceration related to inability to close the eyelids secondary to exophthalmos for a patient with Graves’ disease. What is an appropriate nursing intervention to prevent this problem?
a. Teach the patient to blink every few seconds to lubricate the cornea.
b. Elevate the head of the patient’s bed to reduce periorbital fluid.
c. Apply eye patches to protect the cornea from irritation.
d. Place cold packs on the eyes to relieve pain and swelling.
ANS: B
The patient should sit upright as much as possible to promote fluid drainage from the periorbital area.
Which of the following is the first nursing action indicated when a patient returns to the surgical nursing unit after a thyroidectomy?
a. Check the back of the neck for hemorrhage.
b. Assess respiratory rate and effort.
c. Determine whether the patient can speak normally.
d. Ask the patient whether he or she experiences any tingling in the toes or fingers.
ANS: B
Airway obstruction is a possible complication after thyroidectomy because of swelling or bleeding at the site or tetany, and the priority nursing action is to assess the airway.
A patient with hyperthyroidism is treated with radioactive iodine at a clinic. Before the patient is discharged, what should the nurse instruct the patient about?
a. Symptoms of hyperthyroidism should be relieved in about a week
b. Radioactive precautions to take with urine, stool, and other body secretions
c. Monitoring for symptoms of hypothyroidism, such as easy bruising and cold intolerance
d. Discontinuing the antithyroid medications and propranolol (Inderal) taken before the radioactive therapy
ANS: C
There is a high incidence of postradiation hypothyroidism after radioactive iodine, and the patient should be monitored for symptoms of hypothyroidism.
After 5 years of experiencing depression, fatigue, and lethargy, an older adult woman is diagnosed with hypothyroidism, and levothyroxine (Synthroid) is prescribed. During initiation of thyroid replacement for the patient, it is most important for the nurse to assess which of the following functions?
a. Mental status
b. Nutritional status
c. Cardiovascular function
d. Fluid and electrolyte balance
ANS: C
In older adult patients, initiation of levothyroxine therapy can increase myocardial oxygen demand and cause angina or dysrhythmias.
While a 68-year-old woman is hospitalized for a fractured femur, she is diagnosed with hypothyroidism. Which of the following medications ordered for the patient at the time of admission does the nurse recognize should not be administered without consulting the physician?
a. A stool softener
b. A sedative
c. An analgesic
d. An antibiotic
ANS: B
Worsening of mental status and myxedema coma can be precipitated in patients with hypothyroidism by the use of sedatives, especially in older adults.
When teaching a patient with newly diagnosed hypothyroidism about management of the condition, the nurse should do which of the following?
a. Schedule daily home visits by home care nurses to repeat the necessary instructions.
b. Delay teaching about the condition until the patient has responded to replacement therapy.
c. Provide written handouts of all instructions for continued reference as the patient improves.
d. Designate a family member to teach the patient about the condition when forgetfulness has improved.
ANS: C
Written instructions will be helpful to the patient because, initially, the hypothyroid patient may be unable to remember to take medications and other aspects of self-care.
When admitting a patient who has just recently fallen and broken his hip, the nurse notes hypertension, muscle wasting, and a large buffalo hump. The nurse knows that these findings are consistent with the patient having which following diagnosis?
a. Addison’s disease
b. SIADH
c. Cushing’s syndrome
d. Pheochromocytoma
ANS: C
These assessment findings are consistent with a diagnosis of Cushing’s syndrome—particularly the classic buffalo hump, which is visible as fat deposits on the back of the neck and on the shoulders.
Following a thyroidectomy, a patient develops generalized muscle cramps and mild tetany. The patients’ calcium levels are decreased. Which nursing action is appropriate?
a. Administer the ordered muscle relaxant.
b. Have the patient rebreathe using a paper bag.
c. Start oxygen at 2 to 3 L/min per cannula.
d. Give the ordered oral calcium supplement.
ANS: B
Rebreathing may partially alleviate acute neuromuscular symptoms associated with hypocalcemia, such as generalized muscle cramps, or mild tetany. Patients who can cooperate should be instructed to breathe in and out of a paper bag or breathing mask. This reduces carbon dioxide excretion from the lungs, increases carbonic acid levels in the blood, and lowers the pH.
Following a thyroidectomy, the patient develops hypoparathyroidism. The nurse teaches the patient that maintenance therapy for the hypoparathyroidism will include which of the following?
a. Calcium supplements
b. A diet high in oxalic acid
c. Phosphorus supplements
d. Parenteral parathyroid hormone
ANS: A
Oral calcium supplements are used to maintain the serum calcium in the normal range and prevent the complications of hypocalcemia.
A patient with hypoparathyroidism receives instructions from the nurse regarding symptoms of hypo- and hypercalcemia. The nurse teaches the patient that if mild symptoms of hypocalcemia occur, the patient should do which of the following?
a. Increase the daily fluid intake to twice the usual amount.
b. Self-administer intramuscular calcium before calling the doctor.
c. Call an ambulance because the symptoms will progress to seizures.
d. Breathe in and out of a paper bag to temporarily relieve the symptoms, and then seek medical assistance.
ANS: D
Rebreathing may help alleviate mild symptoms, but it will only temporarily increase ionized calcium level, so the patient should call the physician.
A nursing assessment of a patient with Cushing’s syndrome reveals that the patient has truncal obesity and thin arms and legs. What is an additional manifestation of Cushing’s syndrome that the nurse would expect to find?
a. Hypotension
b. Decreased axillary and pubic hair
c. Purplish red striae on the abdomen
d. Bronzed hyperpigmentation of the skin
ANS: C
Purplish red striae on the abdomen are a common clinical manifestation of Cushing’s syndrome.
A patient with Cushing’s syndrome is admitted to the hospital in preparation for surgery to remove an adrenal tumour. During the admission assessment, the patient tells the nurse that she looks so awful she does not want anyone to be around her. What is the best response to the patient?
a. “Let me show you how to dress so that the changes are not so noticeable.”
b. “I do not think you look bad. Your appearance is just altered by your disease.”
c. “You really should not worry about how you look in the hospital. We see many worse things.”
d. “Most of the physical and mental changes caused by the disease will gradually improve after surgery.”
ANS: D
The most reassuring communication to the patient is that the physical and emotional changes caused by the Cushing’s syndrome will resolve after hormone levels return to normal postoperatively.