If the first blood pressure reading is abnormal, what should you do?

• A. Keep the first reading as final.
• B. Increase cuff size automatically.
• C. Discard the first reading and retake after rest, using the average of later readings.
• D. Ignore measurement variability and take one more reading.

Answer: (C)

First blood pressure readings can be unreliable due to factors like recent activity, anxiety, or how the cuff was applied. To get an accurate value, you should have the patient rest, retake the measurement, discard the initial reading, and then use the average of the later readings. Taking multiple measurements and averaging helps smooth out random error and gives a more trustworthy estimate of true blood pressure. Make sure the technique is correct: seated with back supported, feet uncrossed, arm at heart level, and an appropriate cuff size, with no talking during the measurement. This approach avoids basing decisions on a potentially flawed first result and reduces variability in readings.