Too-tight blood pressure cuffs can cause 'strikingly inaccurate' readings and a misdiagnosis of hypertension for adults with larger arms, a Johns Hopkins University study has found.
Monday in JAMA Internal Medicine. They examined 195 adults from Baltimore with a mean age of 54 and a range of arm sizes who volunteered for four sets of blood pressure readings using too-small, too-large and appropriately sized cuffs.
Adults requiring a large or extra-large cuff had 4.8 mm Hg and 19.5 mm Hg higher blood pressure readings from the regular cuff, respectively, than from their correct sizes. Earlier studies didn’t quantify the impact of the wrong cuff sizes on blood pressure readings and related diagnoses, she noted. According to other data cited in the study, only 74% of medical students under observation chose the right cuff size for measurements.
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