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Review
of Clinical Signs

Sources of Error in Blood Pressure Measurement

Series Editor and Author: Bernard Karnath, MD

1. The length and width of the inflatable bladder within the cuff sheath of a mercury or aneroid sphygmomanometer should be what percentage of the circumference of an adult patient’s arm?
  1. Length, 40%; width, 20%
  2. Length, 60%; width, 60%
  3. Length, 80%; width, 40%
  4. Length, 100%; width, 60%
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2. Which of the following represents the most appropriate rate by which the cuff bladder should be deflated during blood pressure determination?

  1. 2 to 4 mm Hg/second
  2. 6 to 8 mm Hg/second
  3. 8 to 10 mm Hg/second
  4. 10 to 12 mm Hg/second
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3. For most adults, what phases of the Korotkoff sounds are used to determine systolic and diastolic blood pressure?
  1. Phase I for systolic blood pressure; phase II for diastolic blood pressure
  2. Phase I for systolic blood pressure; phase V for diastolic blood pressure
  3. Phase II for systolic blood pressure; phase III for diastolic blood pressure
  4. Phase II for systolic blood pressure; phase IV for diastolic blood pressure
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