Evaluation of digital blood pressure measured with the Omron F3 device as an index of brachial arterial pressure, under different thermal and hormonal conditions

Abstract

Background: Devices that record from the finger have potential practical advantages for home monitoring of blood pressure. However, digital arterial pressure may vary substantially from that in the brachial artery, due to the influence of peripheral wave reflection. Aims: (1) To compare digital arterial pressure, as measured with the Omron F3 device, with brachial arterial pressure and (2) to determine the effect on digital pressure of changing local vascular resistance. Method: The subjects were normotensive young adult non-smokers (12 males, 14 females). Pressures were recorded simultaneously from arm (using an Omron HEM-705CP) and finger with subjects seated and both recording sites at the level of the xiphisternum. Measurements were made at ambient temperatures of 19؇C and 30؇C; at rest, during brief contralateral hand cooling and after hand rewarming.

Devices for ambulatory and home monitoring of blood pressure, lipids, coagulation, and weight management, part 1

“…Arterial blood pressure becomes "damped" as blood moves from the large vessels, like the aorta, to the smaller vessels due to changes in vascular resistance. 22 Wrist monitors may overestimate systolic and diastolic blood pressures by as much as 16 and 7 mm Hg, respectively. 18,23 Studies have not shown finger monitors to be any more accurate.…”