Practice Quiz

Cardiac-Vascular Nursing Exam Prep I

Category - Cardiac

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The nurse calculates the ankle-brachial index of a patient as 0.65. Patient is concerned to know about the significance of this value. What is the correct answer given by the nurse?
  1. Ankle-brachial index gives the percentage of blockage in the artery of foot
  2. Ankle-brachial index is calculated to estimate the degree of arterial occlusion in patients suspected of having peripheral arterial disease. Values between 0.5 to 0.8 suggest moderate arterial disease
  3. Ankle-brachial index gives the estimate of power in the muscles of lower limb
  4. Ankle-brachial index gives an idea about the oxygenation of tissues
Explanation
Answer: B
Ankle-brachial index (ABI): measure brachial pressure bilaterally (use highest pressure) and measure pressure at ankle.
An abnormal ABI is defined as an index < 0.90. Values between 0.8 to 0.9 suggest some arterial disease. Values between 0.5 to 0.8 suggest moderate arterial disease. Values less than 0.5 is suggestive of severe arterial disease
Rest pain usually appears at an ABI < 0.3.
Solution: Trans-cutaneous oxygen studies to measure tissue oxygenation (30 mmHg necessary for primary wound healing). Doppler flow studies and real-time Duplex scanning
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