Correct technique for manual blood pressure measurement includes:

Explanation

AHA technique: 5-minute quiet rest, back supported, feet flat (not crossed), arm bare and supported at heart level, appropriate cuff size (bladder length 80% of arm circumference, width 40%), and no talking during measurement. Cuff placed over clothing (d), unsupported arm hanging at the side (c), and routine standing measurement (b) all introduce systematic error. Wrong technique can over- or under-estimate BP by 10-20 mmHg, leading to misdiagnosis, missed hypertension, or unnecessary treatment.