MCQ Medicine Answer 18

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The Correct Answer is B


(Harrison’s 16th Ed., 1891)

The serum Amylase is widely used as screening test for acute pancreatitis.
  • A value >65U/L should raise the question of acute pancreatitis. Levels >130U/L make the diagnosis more likely, and values greater than three times normal virtually clinch the diagnosis if gut perforation or infarction is excluded.
  • It is elevated within 24 hrs of onset and remains so for 1-3 days. Levels return to normal within 3-5 days unless there is extensive pancreatic necrosis, incomplete ductal obstruction or pseudocyst formation.
  • Approx. 85% will have a raised amylase level.
  • Levels may be normal if there is a delay before blood samples are taken, chronic pancreatits, or if hypertriglyceridemia is present.
  • 20-40% false negatives and positives


Category: Internal Medicine MCQs , Medicine MCQs

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