Accuracy of the KOROT P3 Accurate automated auscultatory blood pressure measuring device for professional use in people with extra-large arms

Objective To determine the accuracy of the KOROT P3 Accurate (previously InBody BPBIO480KV) monitor, an automated auscultatory blood pressure (BP) measuring device developed for professional use, in people with extra-large arms according to the ISO81060-2 2018 protocol. Methods The KOROT P3 Accurate was tested in 37 subjects with upper-arm circumference ranging from >42 to 53 cm using a mercury sphygmomanometer coupled to a 20 x 40 cm tronco-conical cuff as the reference standard. Results The mean BP difference between the device and the observers' reference measurements was 1.2 +/- 2.0 mmHg for systolic BP and 1.0 +/- 2.0 mmHg for diastolic BP. These data were in agreement with criterion 1 of the protocol standard requirements (<= 5 +/- 8 mmHg). Also criterion 2 was satisfied being the standard deviations +/- 1.7 mmHg for systolic BP and +/- 1.6 for diastolic BP, well below the maximum values required by the protocol (+/- 6.84/6.87 mmHg). Scatterplots of device-reference systolic and diastolic BP differences showed similar accuracy across the range of participants' BP, arm circumference and upper-arm slant angle. Conclusions These data show that the KOROT P3 Accurate monitor satisfied the ISO 81060-2:2018 standard requirements in a special population of people with extra-large arms ranging from >42 to 53 cm.