Related Experiment Video
Updated: Aug 16, 2026

A Methodological Approach to Non-invasive Assessments of Vascular Function and Morphology
Published on: February 7, 2015
Validation of semi-automatic device UA-704 for self-measurement of blood pressure
Zhanna D Kobalava1, Yulia V Kotovskaya, Eugeniy Rodionov
1Department of Cardiology and Clinical Pharmacology, Russian Peoples Friendship University, Moscow, Russian Federation.
Objective:
To perform a clinical validation for a semi-automatic arm-type device UA-704 (A&D Company, Ltd., Tokyo, Japan) according to the British Hypertension Society protocol.
Methods:
Eighty-five study participants (37 men) were included. The mean age was 50.1+/-17.0 years, systolic blood pressure range was 79-212 mmHg and diastolic blood pressure range was 43-118 mmHg. For each participant, three readings of the UA-704 were compared with simultaneous auscultatory measurements by two trained independent observers. The observers used a mercury calibrated sphygmomanometer and a dual stethoscope. The results were graded according to the 1993 British Hypertension Society protocol.
Results:
The average difference between mercury sphygmomanometer and UA-704 readings was -1.85+/-4.26 mmHg (mean+/-SD) for systolic blood pressure and -1.44+/-3.97 mmHg for diastolic blood pressure. The proportions of values agreeing to within 5, 10 and 15 mmHg were 79.2%, 96.5% and 99.6% for systolic blood pressure and 86.7%, 96.9% and 99.6% for diastolic blood pressure for the observers and device (A/A grade for British Hypertension Society).
Conclusions:
For an adult population, the UA-704 device for self-measurement of blood pressure achieved a British Hypertension Society grade A/A and therefore can be recommended for home blood pressure monitoring.
Related Concept Videos
Equipments Used To Measure Blood Pressure
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
Assessment of blood pressure in brachial artery(one-step method)
Prepare for the Procedure:
Assessment of blood pressure in brachial artery(two-step method)
Measurement of Blood Pressure
Sites for measuring blood pressure
The Brachial Artery: Primary Site for Blood Pressure Measurement
Assessing Blood pressure using a doppler ultrasound
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment: