Scientists at the Johns Hopkins Bloomberg School of Public Health in Baltimore found that using a standard-sized cuff led to inaccurate blood pressure measurements when the forearm circumference was large. Research published JAMA Internal Medicine.
The experiment involved 195 adults. They measured the pressure alternately using an appropriate, too small or too large sphygmomanometer cuff.
The researchers found that using a conventional cuff increased an average of 3.6 mmHg. Art. underestimated systolic pressure among those requiring a small cuff.
In contrast, standard cuff use increased systolic pressure by 4.8 and 19.5 mmHg in those who needed large or very wide cuffs. Art. respectively.
“Using a standard size cuff for all people, regardless of arm size, resulted in a dramatically inaccurate pressure measurement. It would be prudent to focus on individual selection of the tonometer cuff, particularly in people with large arm circumferences,” said the authors.
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