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Popular home blood pressure monitoring cuff devices may not fit some US adults

American Heart Association Meeting Report – Moderated Poster Presentation MP23

2024-09-05
(Press-News.org) Research Highlights:

An analysis of at-home blood-pressure monitors estimates that the arm cuffs for 10 of the most popular potentially do not fit up to 18 million adults in the U.S. and nearly 12% of Black adults. To ensure accurate blood pressure monitoring, the researchers suggest that manufacturers and retailers be aware of the disparities and improve access and selection of diverse blood pressure cuff sizes for consumers. Note: The studies featured in this news release are research abstracts. Abstracts presented at the American Heart Association’s scientific meetings are not peer-reviewed, and the findings are considered preliminary until published as a full manuscript in a peer-reviewed scientific journal. Embargoed until 8 a.m. CT/9 a.m. ET, Thursday, Sept. 5, 2024

CHICAGO, Sept. 5, 2024 — At-home blood-pressure monitor cuffs may improperly fit many adults in the U.S., according to preliminary research presented at the American Heart Association’s Hypertension Scientific Sessions 2024 and simultaneously published today in the journal Hypertension. The meeting is in Chicago, September 5-8, 2024, and is the premier scientific exchange focused on recent advances in basic and clinical research on high blood pressure and its relationship to cardiac and kidney disease, stroke, obesity and genetics.

Researchers investigated the cuff size available with home blood pressure monitors. They estimate that for as many as 18 million U.S. adults — nearly 7% of the adult population — the cuffs are too small or too large and may not provide accurate blood pressure measurements. A separate recent clinical trial found that a cuff that is one size too small or one size too large can over- or under-estimate blood pressure readings.

“Most popular blood pressure devices we tested had the same cuff size coverage – to fit arms with a circumference from 8.7 to 16.5 inches (22 centimeters to 42 centimeters). We estimate that these one-size cuffs would not properly fit approximately 18 million U.S. adults potentially providing inaccurate blood pressure measures,” said senior study author Kunihiro Matsushita, M.D., Ph.D., FAHA, a professor in the department of epidemiology in the division of cardiology at Johns Hopkins University in Baltimore.

According to the American Heart Association’s 2024 Statistical Update, nearly half of U.S. adults have been diagnosed with high blood pressure. Uncontrolled high blood pressure can lead to heart attack, stroke, heart failure and other complications. The 2017 ACC/AHA Guideline for the Prevention, Detection, Evaluation, and Management of High Blood Pressure in Adults classifies high blood pressure as having top or bottom blood pressure measures greater than or equal to 130/80 mm Hg. The Association recommends all people with high blood pressure monitor their blood pressure at home with a home blood pressure monitor between office visits to help their health care professional know if treatments are working. Upper arm cuff devices are preferred over wrist devices, according to an American Heart Association/American Medical Association 2020 joint report.

For this study, researchers reviewed 10 of the most popular blood-pressure monitoring devices sold through a large online retailer. Nine of the 10 devices offered a cuff-size range of 22- to 42-centimeters (8.7 inches to 16.5 inches) in circumference. Although several manufacturers offer additional cuff sizes at an extra cost, the researchers focused on the cuffs that come standard with the blood pressure devices because most consumers are likely to use those default cuffs.

After comparing the circumference of the devices against data from the U.S. National Health and Nutrition Examination Survey (NHANES) from 2015-2020 and extrapolating that representative data on to U.S. Census data, the researchers concluded:

6.7% of U.S. adults (17.3 million adults based on the 2023 U.S. Census) could not use these devices because their arm circumferences were less than 8.7 inches (22 centimeters) or greater than 16.5 inches (42 centimeters). The proportion of adults whose arms would not fit in these devices was highest among Black adults (11.8%), compared to white adults (6.6%), Hispanic adults (5.2%) and Asian adults (1.8%). “This disparity in sizing is particularly concerning given the already high and increasing prevalence of high blood pressure among Black adults. To increase equity, manufacturers should prioritize the development and affordable sale of blood pressure measuring devices that accommodate arm circumferences greater than 42 centimeters, and health care professionals should measure patients’ arm circumferences to help them select an appropriate cuff size when purchasing a home blood pressure device,” Matsushita said. ”Addressing the size disparity in device design is crucial for quality and equitable high blood pressure diagnosis and management.”

Study details, background or design:   

The researchers reviewed data from the National Health and Nutrition Examination Survey (NHANES 2015-2020) database for 13,826 adults who were 18 years or older and not pregnant. This database was also the source used to quantify how many people would be ineligible to use retail devices due to arm circumference. Participants’ average age was 47 years-old; 51% self-identified as women and 49% as men. Participants were considered to have high blood pressure if they had blood pressure readings of 130/80 mm Hg or higher, a self-reported physician diagnosis of high blood pressure, or if they were taking blood pressure medication. Researchers searched a large online retailer’s automatic blood pressure category in January 2024 to identify the most widely used devices by referencing their ranking, number of purchases and number of ratings in the previous month. Please note: The data in this news release are updated and therefore do not match the data in the abstract but do match the data in the simultaneous publication. The update has been confirmed by the researchers. The study’s limitations included its restriction to a single large online retailer and only 10 devices. The researchers had planned to review 16 devices, however, 6 devices were unavailable for purchase.

“This study is interesting, important and provides very practical information. Use of an incorrect arm cuff size is one of the more important sources of systematic (predictable) error during blood pressure measurement. This research found that the number of U.S. adults expected to have an arm size larger than routinely covered by the cuff size provided by the manufacturer (16.5 million) was much larger than the number expected to have an arm size smaller than that routinely covered by the manufacturer (0.8 million). Thus, the use of a routinely sized cuff is far more likely to result in overestimation of hypertension rather than underestimation of hypertension. The best solution is to have cuffs of different sizes available, so a cuff that is of correct size for the patient can be chosen,” said Paul K. Whelton, M.B., M.D., M.Sc., FAHA. Whelton is the Show Chwan Chair in Global Public Health in the department of epidemiology at Tulane University’s School of Public Health and Tropical Medicine in New Orleans and president of the World Hypertension League, as well as chair of the American Heart Association’s 2017 Hypertension Practice Guidelines and a member of the writing committee for the Association’s 2021 Scientific Statement on Management of Stage 1 Hypertension in Adults.

“In addition to selection of the correct cuff size, other sources of systematic (predictable) error should be excluded by preparing the patient, choosing an appropriate BP measurement site and using clinically validated BP measurement devices,” Whelton said.

Note: Moderated Poster Presentation MP23 in Session MPS04 Social Determinant of Health and Blood Pressure is Friday, September 6, 2024, at 10:10 am CT.

Statements and conclusions of studies presented at the American Heart Association’s scientific meetings are solely those of the study authors and do not necessarily reflect the Association’s policy or position. The Association makes no representation or guarantee as to their accuracy or reliability. Abstracts presented at the Association’s scientific meetings are not peer-reviewed, rather, they are curated by independent review panels and are considered based on the potential to add to the diversity of scientific issues and views discussed at the meeting. The findings are considered preliminary until published as a full manuscript in a peer-reviewed scientific journal. 

The Association receives funding primarily from individuals; foundations and corporations (including pharmaceutical, device manufacturers and other companies) also make donations and fund specific Association programs and events. The Association has strict policies to prevent these relationships from influencing the science content. Revenues from pharmaceutical and biotech companies, device manufacturers and health insurance providers and the Association’s overall financial information are available here. 

Additional Resources:

Available multimedia is on the right column of the release link https://newsroom.heart.org/news/popular-home-blood-pressure-monitoring-cuff-devices-may-not-fit-some-us-adults?preview=15c7dd8a91a9109f875ef421dac4f060 AHA news release: Study finds blood pressure cuff size matters, affects blood pressure readings (March 2022) AHA policy statement: Self-Measured Blood Pressure Monitoring at Home: A Joint Policy Statement From the American Heart Association and American Medical Association AHA resource: Home Blood Pressure Monitoring Follow AHA/ASA news from the meeting on X @HeartNews #Hypertension24 About the American Heart Association

The American Heart Association is a relentless force for a world of longer, healthier lives. We are dedicated to ensuring equitable health in all communities. Through collaboration with numerous organizations, and powered by millions of volunteers, we fund innovative research, advocate for the public’s health and share lifesaving resources. The Dallas-based organization has been a leading source of health information for a century. During 2024 - our Centennial year - we celebrate our rich 100-year history and accomplishments. As we forge ahead into our second century of bold discovery and impact, our vision is to advance health and hope for everyone, everywhere. Connect with us on heart.org, Facebook, X or by calling 1-800-AHA-USA1.

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[Press-News.org] Popular home blood pressure monitoring cuff devices may not fit some US adults
American Heart Association Meeting Report – Moderated Poster Presentation MP23