Evidence map›Paper›PMID 34667230›Full record

ArticleScientific reports2021

Validation of the optical Aktiia bracelet in different body positions for the persistent monitoring of blood pressure.

Josep Sola, Anna Vybornova, Sibylle Fallet, Erietta Polychronopoulou, Arlene Wurzner-Ghajarzadeh, Gregoire Wuerzner

Registry-linked trialOpen access · goldAbstract read
In one paragraph

Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06573801 (A Single Centre Randomised Prospective Cross-over Study to Assess Agreement Between Blood Pressure Measurements Taken Using Cuffless Wearable and Cuffed, Ambulatory Blood Pressure Monitoring Devices.), which is not on this map. Cited by 29 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 2 pooled it
5.3field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT06573801 nacompletednot on this mapstarted 2025, after this paper: background citation

A Single Centre Randomised Prospective Cross-over Study to Assess Agreement Between Blood Pressure Measurements Taken Using Cuffless Wearable and Cuffed, Ambulatory Blood Pressure Monitoring Devices.

TypeinterventionalSponsorQueen Mary University of LondonRan2025 to 2025Enrolled48ConditionsBlood PressureArmsAktiia Bracelet, Healthstats BPro Evo, Spacelabs OnTrak Ambulatory Blood Pressure monitor
3 · Its place in the literature

Who cites it

29 citing papers in PubMed, 2 syntheses or guidelines pooled it, 51 citations in OpenAlex.

  1. Pooled it
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  16. A novel model describing blood pressure profiles.Frontiers in cardiovascular medicine · 2025
    Article
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  20. Observational
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 1 institution in 1 country.

Josep SolaAktiia SA, Rue du Bassin 8a, 2000, Neuchâtel, Switzerland. josep@aktiia.com.
Anna VybornovaAktiia SA, Rue du Bassin 8a, 2000, Neuchâtel, Switzerland.
Sibylle FalletAktiia SA, Rue du Bassin 8a, 2000, Neuchâtel, Switzerland.
Erietta PolychronopoulouService of Nephrology and Hypertension, CHUV - Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland.
Arlene Wurzner-GhajarzadehService of Nephrology and Hypertension, CHUV - Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland.
Gregoire WuerznerService of Nephrology and Hypertension, CHUV - Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland.
University of Lausanne · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The diagnosis of hypertension and the adjustment of antihypertensive drugs are evolving from isolated measurements performed at the physician offices to the full phenotyping of patients in real-life conditions. Indeed, the strongest predictor of cardiovascular risk comes from night measurements. The aim of this study was to demonstrate that a wearable device (the Aktiia Bracelet) can accurately estimate BP in the most common body positions of daily life and thus become a candidate solution for the BP phenotyping of patients. We recruited 91 patients with BP ranging from low to hypertensive levels and compared BP values from the Aktiia Bracelet against auscultatory reference values for 4 weeks according to an extended ISO 81060-2 protocol. After initializing on day one, the observed means and standard deviations of differences for systolic BP were of 0.46 ± 7.75 mmHg in the sitting position, - 2.44 ± 10.15 mmHg in the lying, - 3.02 ± 6.10 mmHg in the sitting with the device on the lap, and - 0.62 ± 12.51 mmHg in the standing position. Differences for diastolic BP readings were respectively of 0.39 ± 6.86 mmHg, - 1.93 ± 7.65 mmHg, - 4.22 ± 6.56 mmHg and - 4.85 ± 9.11 mmHg. This study demonstrates that a wearable device can accurately estimate BP in the most common body positions compared to auscultation, although precision varies across positions. While wearable persistent BP monitors have the potential to facilitate the identification of individual BP phenotypes at scale, their prognostic value for cardiovascular events and its association with target organ damage will need cross-sectional and longitudinal studies. Deploying this technology at a community level may be also useful to drive public health interventions against the epidemy of hypertension.

Indexed as

AdultAntihypertensive AgentsBlood PressureBlood Pressure DeterminationBlood Pressure Monitoring, AmbulatoryCross-Sectional StudiesFemaleHumansHypertensionMaleMiddle AgedPostureVital SignsWearable Electronic DevicesAntihypertensive Agents

Identifiers

PMID34667230
PMCPMC8526831
OpenAlexW3207149978

What OpenQuestion holds

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Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.