CHS Blood Pressure Measurement Techniques & Monitoring 1 — Questions and Answers
Question 1: What is the recommended cuff bladder width for standard adult blood pressure measurement?
- 8–10 cm
- 12–14 cm (Correct answer)
- 16–18 cm
- 6–8 cm
Correct answer: 12–14 cm
The standard adult BP cuff bladder should be 12–14 cm wide and encircle at least 80% of the arm circumference for accurate readings.
Question 2: Which arm position is recommended for accurate auscultatory blood pressure measurement?
- Arm raised above heart level
- Arm hanging freely at the side
- Arm supported at heart level (mid-sternum) (Correct answer)
- Arm crossed over the chest
Correct answer: Arm supported at heart level (mid-sternum)
The arm must be supported at heart level because positions lower than the heart falsely elevate readings and positions higher falsely lower them.
Question 3: How long should a patient rest in a seated position before a blood pressure measurement is taken?
- 1 minute
- 3 minutes
- 5 minutes (Correct answer)
- 10 minutes
Correct answer: 5 minutes
AHA/ACC guidelines recommend at least 5 minutes of quiet rest before measurement to allow cardiovascular stabilization.
Question 4: What is the correct rate of cuff deflation during auscultatory blood pressure measurement?
- 1–2 mmHg per second (Correct answer)
- 5–6 mmHg per second
- 8–10 mmHg per second
- 10–15 mmHg per second
Correct answer: 1–2 mmHg per second
Deflating at 1–2 mmHg per second allows accurate identification of each Korotkoff sound phase and prevents over- or underestimation of pressure.
Question 5: Which Korotkoff sound phase corresponds to the systolic blood pressure reading?
- Phase II
- Phase III
- Phase I (Correct answer)
- Phase IV
Correct answer: Phase I
Phase I is the first appearance of clear, repetitive tapping sounds as blood begins flowing through the compressed artery, marking systolic pressure.
Question 6: What should a clinician do when a difference of more than 10 mmHg is found between arms during the initial blood pressure assessment?
- Average the two readings
- Always use the left arm reading
- Use the lower reading for documentation
- Use the higher reading and investigate for vascular disease (Correct answer)
Correct answer: Use the higher reading and investigate for vascular disease
An inter-arm difference >10 mmHg suggests peripheral arterial disease or aortic coarctation; the higher reading is used for clinical decisions and further workup is warranted.
Question 7: What is the recommended minimum waiting time between repeat blood pressure measurements in the same arm?
- 15 seconds
- 30 seconds
- 1 minute (Correct answer)
- 5 minutes
Correct answer: 1 minute
Waiting at least 1 minute allows venous refilling and arm recovery after cuff compression, improving the accuracy and reliability of the second measurement.
CHS Blood Pressure Measurement Techniques & Monitoring 1
What is the recommended cuff bladder width for standard adult blood pressure measurement?