Simultaneous self‐monitoring comparison of a supine algorithm‐equipped wrist nocturnal home blood pressure monitoring device with an upper arm device

Abstract

A nocturnal home blood pressure (BP) monitoring device that measures nighttime BP levels accurately with less sleep disturbance is needed for the 24‐h management of hypertension. Here we conducted the first comparison study of simultaneous self‐monitoring by both a supine position algorithm‐equipped wrist nocturnal home BP monitoring device, the HEM‐9601T (NightView; Omron Healthcare) with a similar upper arm device, the HEM‐9700T (Omron Healthcare) in 50 hypertensive patients (mean age 68.9 ± 11.3 years). Both devices were worn on the same non‐dominant arm during sleep over two nights. The patients self‐measured their nighttime BP by starting nocturnal measurement mode just before going to bed. In total, 694 paired measurements were obtained during two nights (7.2 ± 1.5 measurements per night), and the mean differences (±SD) in systolic BP between the devices was 0.2 ± 10.2 mmHg (p = .563), with good agreement. In the comparison of nighttime BP indices, the difference in average SBP at 2:00, 3:00, and 4:00 AM and the average SBP of 1‐h interval measurements was −0.5 ± 5.5 mmHg (p = .337), with good agreement. The HEM‐9601T substantially reduced sleep disturbance compared to the upper arm‐type device. The newly developed HEM‐9601T (NightView) can thus accurately measure BP during sleep without reducing the wearer's sleep quality.

Reproducibility of nighttime home blood pressure measured by a wrist‐type nocturnal home blood pressure monitoring device

“…This was a post hoc analysis of data obtained from our comparison study of nighttime home BP readings measured by an HEM‐9601T wrist‐type device (NightView; Omron Healthcare) and an HEM‐9700T upper arm‐type device (Omron Healthcare) 9 . Details of the comparison study design have been published previously 9 .…”

“…The BP values measured by the HEM‐9601T were confirmed to be reliable both under laboratory conditions 8 and sleeping conditions at home. 9 In the present study, we investigated the reproducibility of nighttime home BP values measured by the wrist‐type HBPM device under real‐world sleeping conditions at home.…”

Comparison of nighttime measurement schedules using a wrist‐type nocturnal home blood pressure monitoring device

“…Even under these somewhat uncomfortable conditions, not much frequent sleep disturbance (average of 0.8–1.4 times of awakening per night) was reported during the present hourly BP measurements. 10 If only a wrist device were worn, discomfort and sleep disturbance would be further reduced. In addition, a lower frequency of nighttime measurements would be more acceptable for many people who need to repeatedly monitor their BP during sleep for a long period.…”

“… 10 Details of the comparison study design have been published. 10 Briefly, 50 hypertensive patients with antihypertensive treatment (mean age 68.9 ± 11.3 years) were asked to measure their nighttime BP during sleep at home for two consecutive nights. They were instructed to wear both the wrist and upper‐arm devices on the same non‐dominant arm and to start the nighttime measurement mode just before going to bed each night.…”

“…The BP values measured by the HEM‐9601T were confirmed to be reliable both under laboratory conditions 9 and real‐world sleeping conditions at home. 10 Although these reliable nocturnal HBPM devices has been developed and the evidence of nighttime home BP measurements has been accumulating, the optimal nighttime home BP measurement schedule has not been established. Some studies have used a clock‐based BP measurement schedule and other studies preset the measurement timing as the elapsed time after the subject has gone to bed.…”