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Can an electronic device with a single cuff be accurate in a wide range of arm size? Validation of the Visomat Comfort 20/40 device for home blood pressure monitoring

Journal of Human Hypertension volume 22, pages 796–800 (2008)Cite this article

Abstract

An appropriate cuff according to the individual's arm circumference is recommended with all blood pressure (BP) monitors. An electronic device for home monitoring has been developed (Visomat Comfort 20/40) that estimates the individual's arm circumference by measuring the cuff filing volume and makes an adjustment of measured BP taking into account the estimated arm circumference. Thus the manufacturer recommends the use of a single cuff for arm circumference 23–43 cm. The device accuracy was assessed using the European Society of Hypertension International Protocol. Simultaneous BP measurements were obtained in 33 adults by two observers (connected mercury sphygmomanometers) four times, sequentially with three measurements taken using the tested device. Absolute device-observer BP differences were classified into ⩽5, ⩽10 and ⩽15 mm Hg zones. For each participant the number of measurements with a difference ⩽5 mm Hg was calculated. The device produced 60/89/97 measurements within 5/10/15 mm Hg respectively for systolic BP, and 72/97/98 for diastolic. Twenty-three subjects had at least two of their systolic BP differences ⩽5 mm Hg and three had no differences ⩽5 mm Hg (for diastolic 27 and 1, respectively). Mean device-observer BP difference (systolic/diastolic) was 3.7±5.6/−1.5±4.7 mm Hg (4.7±4.9/−1.7±4.3 in arm circumference 23–29 cm [39 readings] and 3.1±5.9/−1.4±5.0 in arm 30–34 cm [60 readings], P=NS). In conclusion, the device fulfils the International Protocol requirements and can be recommended for clinical use. Interestingly, the device was accurate using a single cuff in a wide range of arm circumference (23–34 cm). This study provides no information about the device accuracy in larger arms.

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Acknowledgements

This work was funded by a grant from UEBE Medical GmbH Wertheim, Germany.

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Authors and Affiliations

  1. Third University Department of Medicine, Hypertension Center, Sotiria Hospital, Athens, Greece

    G S Stergiou, D Tzamouranis, E G Nasothimiou & A D Protogerou

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  1. G S Stergiou
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  2. D Tzamouranis
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  3. E G Nasothimiou
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  4. A D Protogerou
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Correspondence to G S Stergiou.

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Stergiou, G., Tzamouranis, D., Nasothimiou, E. et al. Can an electronic device with a single cuff be accurate in a wide range of arm size? Validation of the Visomat Comfort 20/40 device for home blood pressure monitoring. J Hum Hypertens 22, 796–800 (2008). https://doi.org/10.1038/jhh.2008.70

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