Mosby’s Canadian Manual of Diagnostic and Laboratory Tests 2nd Edition Pagana Test Bank

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Edition: 2nd Edition

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Mosby’s Canadian Manual of Diagnostic and Laboratory Tests 2nd Edition Pagana Test Bank

Pagana: Mosby’s Canadian Manual of Diagnostic and Laboratory Tests, 2nd Canadian Edition

Practice Test Answer Key

1. Which of these instructions should a nurse give an elderly, dehydrated patient after computed tomography (CT) of the kidney with intravenous iodine contrast material?

  1. Drink plenty of fluids for 24 hours
  2. Avoid heavy lifting for 2 days
  3. Use a laxative to clear the contrast from the bowel
  4. None of the above

Answer: a
Rationale: Elderly patients are often chronically dehydrated and therefore especially susceptible to renal impairment after receiving intravenous iodine contrast material. Not only is the use of laxatives unnecessary to eliminate the contrast material, but it will also further dehydrate the patient. No physical limitations are required.
Reference page: 1018

2. For a patient with severe bone destruction from tumor or osteomalacia, what serum laboratory results would the nurse expect to assess?

  1. Decreased serum alkaline phosphatase (ALP) level
  2. Increased serum ALP level
  3. Decreased erythrocyte sedimentation rate O
  4. Increased red blood cell count

Answer: b
Rationale: Patients with destructive bone diseases commonly have elevated ALP levels as a result of bone cell destruction and regeneration.
Reference page: 53

3. A patient’s laboratory reports indicate the presence of Bence-Jones proteins. These levels are increased in the urine of patients who have:

  1. Multiple myeloma
  2. Carcinoid syndrome
  3. Breast cancer
  4. Colorectal cancer

Answer: a
Rationale: Bence-Jones proteins are immunoglobulins that are commonly excreted in the urine of patients with multiple myeloma.
Reference page: 943

4. A patient is admitted for evaluation of perforated diverticulitis. Which of the following is the most appropriate test?

a. CT of the abdomen
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Mosby’s Canadian Manual of Diagnostic and Laboratory Tests 2nd Edition Pagana Test Bank

  1. Barium enema
  2. Colonoscopy
  3. All the above

Answer: a
Rationale: CT is accurate for identifying an abdominal abscess. Colonoscopy and barium enema are contraindicated in patients with suspected perforated viscus. Reference page: 1059

5. Blood urea nitrogen (BUN) levels may be abnormally low in which patients?

  1. Overly hydrated patients
  2. Patients with liver disease
  3. Malnourished patients in negative nitrogen balance
  4. All the above

Answer: d
Rationale: BUN levels can decrease normally in patients who are well hydrated. Because liver function must be adequate to make urea, severe liver dysfunction is associated with decreased BUN levels. Because BUN also is a measure of protein nutrition, this level can be diminished in starving patients.
Reference page: 534

6. The serum creatinine level is usually elevated in patients with which of the following?

  1. Renal disease
  2. Liver disease
  3. Lung disease
  4. Muscular disease

Answer: a
Rationale: An elevated serum creatinine level indicates renal disease. No other diseased organ causes elevation of the serum creatinine level.
Reference page: 205

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