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A nurse is providing care for a patient whose pattern of laboratory testing reveals longstanding hypocalcemia. What other laboratory result is most consistent with this finding?
- A. An elevated parathyroid hormone level
- B. An increased calcitonin level
- C. An elevated potassium level
- D. A decreased vitamin D level
Correct Answer: A
Rationale: In the response to low calcium levels in the blood, increased levels of parathyroid hormone prompt the mobilization of calcium and the demineralization of bone. Increased calcitonin levels would exacerbate hypocalcemia. Vitamin D levels do not increase in response to low calcium levels. Potassium levels would likely be unaffected.
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A nurse is caring for an older adult who has been diagnosed with geriatric failure to thrive. This patient's prolonged immobility creates a risk for what complication?
- A. Muscle clonus
- B. Muscle atrophy
- C. Rheumatoid arthritis
- D. Muscle fasciculations
Correct Answer: B
Rationale: If a muscle is in disuse for an extended period of time, it is at risk of developing atrophy, which is the decrease in size. Clonus is a pattern of rhythmic muscle contractions and fasciculation is the involuntary twitch of muscle fibers; neither results from immobility. Lack of exercise is a risk factor for rheumatoid arthritis.
A patient is undergoing diagnostic testing for suspected Paget's disease. What assessment finding is most consistent with this diagnosis?
- A. Altered serum magnesium levels
- B. Altered serum calcium levels
- C. Altered serum potassium levels
- D. Altered serum sodium levels
Correct Answer: B
Rationale: Serum calcium levels are altered in patients with osteomalacia, parathyroid dysfunction, Paget's disease, metastatic bone tumors, or prolonged immobilization. Paget's disease is not directly associated with altered magnesium, potassium, or sodium levels.
A nurse is assessing a patient who is experiencing peripheral neurovascular dysfunction. What assessment findings are most consistent with this diagnosis?
- A. Hot skin with a capillary refill of 1 to 2 seconds
- B. Absence of feeling, capillary refill of 4 to 5 seconds, and cool skin
- C. Pain, diaphoresis, and erythema
- D. Jaundiced skin, weakness, and capillary refill of 3 seconds
Correct Answer: B
Rationale: Indicators of peripheral neurovascular dysfunction include pale, cyanotic, or mottled skin with a cool temperature; capillary refill greater than 3 seconds; weakness or paralysis with motion; and paresthesia, unrelenting pain, pain on passive stretch, or absence of feeling. Jaundice, diaphoresis, and warmth are inconsistent with peripheral neurovascular dysfunction.
An older adult patient has symptoms of osteoporosis and is being assessed during her annual physical examination. The assessment shows that the patient will require further testing related to a possible exacerbation of her osteoporosis. The nurse should anticipate what diagnostic test?
- A. Bone densitometry
- B. Hip bone radiography
- C. Computed tomography (CT)
- D. Magnetic resonance imaging (MRI)
Correct Answer: A
Rationale: Bone densitometry is considered the most accurate test for osteoporosis and for predicting a fracture. As such, it is more likely to be used than CT, MRI, or x-rays.
A nurse is explaining a patient's decreasing bone density in terms of the balance between bone resorption and formation. What dietary nutrients and hormones play a role in the resorption and formation of adult bones?
- A. Thyroid hormone
- B. Growth hormone
- C. Estrogen
- D. Vitamin B12
- E. Luteinizing hormone
Correct Answer: A,B,C
Rationale: The balance between bone resorption and formation is influenced by the following factors: physical activity; dietary intake of certain nutrients, especially calcium; and several hormones, including calcitriol (i.e., activated vitamin D), parathyroid hormone (PTH), calcitonin, thyroid hormone, cortisol, growth hormone, and the sex hormones estrogen and testosterone. Luteinizing hormone and vitamin B12 do not play a role in bone formation or resorption.