What is the clinical evidence from this study?

Study design: Observational. Population: Hypertension / General Population (n=91). Intervention: OptiBP mobile application vs. Auscultatory blood pressure reference. Primary outcome: Accuracy of OptiBP compared to reference BP (AAMI/ESH/ISO validation criterion 1) (MD 0.5 ± 7.7 mmHg (SBP) and 0.4 ± 4.6 mmHg (DBP)).

June 15, 2021Blood Pressure MonitoringOpen Access

Smartphone based blood pressure measurement: accuracy of the OptiBP mobile application according to the AAMI/ESH/ISO universal validation protocol

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Key result

The OptiBP smartphone application fulfilled AAMI/ESH/ISO universal validation standards, demonstrating a mean difference of 0.5 ± 7.7 mmHg for SBP and 0.4 ± 4.6 mmHg for DBP compared to auscultatory reference.

Why the study?

The study was designed to assess the accuracy of the OptiBP smartphone application in estimating blood pressure according to AAMI/ESH/ISO universal standards.

Does the OptiBP smartphone application accurately estimate blood pressure compared to standard auscultatory measurement in a general adult population?

Population

91 subjects recruited at a hypertension clinic in Switzerland

Comparison

OptiBP smartphone application vs reference auscultatory blood pressure measurement

Design

Validation study using the opposite arm simultaneous method

Authors

JDJean DegottUniversity of Lausanne AGArlène Ghajarzadeh‐WurznerUniversity of Lausanne GHGregory HofmannGroupe Hospitalier Diaconesses Croix Saint-Simon

Discussion

Member takes

Implication

Supports OptiBP feasibility for cuffless estimation; leaves open larger validation and outcome studies before clinical use.

Study Design

Type

Observational (n=91)

Blinding

Blinded observers

Multicenter

Structured PICO

Does the OptiBP smartphone application accurately estimate blood pressure compared to standard auscultatory measurement in a general adult population?

Population

91 adults (mean age 52.9 years, 53.8% female) from a hypertension clinic and university setting, evaluated for the accuracy of a smartphone-based blood pressure measurement application.

Intervention

OptiBP smartphone application estimating blood pressure via optical signal (photoplethysmography) from fingertip placed on the smartphone camera, calibrated with an initial reference measurement.

Comparator

Simultaneous reference auscultatory blood pressure measurement on the opposite arm using a validated sphygmomanometer (A&D UM-101) and dual-head stethoscope by two independent blinded observers.

Outcome

Accuracy of systolic and diastolic blood pressure estimation according to AAMI/ESH/ISO universal standards (ISO 81060-2:2018) validation criteria 1 (mean ± SD of differences) and 2 (SD of averaged BP differences per subject).surrogate

Main Result

Mean Difference: 0.5

Limitations

Lack of existing standards to validate a noncontinuous cuffless BP monitor required minor adjustments to the ISO 81060-2:2018 protocol.
The studied population did not precisely meet the criteria of BP values distribution requested by the standards (missing reference measurements with SBP ≥ 160 mmHg).
The study does not provide information about the stability of the calibration over time.
Lack of existing standards to validate a noncontinuous cuffless BP monitor requiring minor adjustments to the ISO protocol
Population did not precisely meet BP distribution criteria (missing SBP ≥ 160 mmHg)
No information about the stability of the calibration over time

Cite This Study

Degott et al. (2021) conducted an observational in Hypertension / General Population (n=91). OptiBP mobile application vs. Auscultatory blood pressure reference was evaluated on Accuracy of OptiBP compared to reference BP (AAMI/ESH/ISO validation criterion 1) (MD 0.5 ± 7.7 mmHg (SBP) and 0.4 ± 4.6 mmHg (DBP)). The OptiBP smartphone application fulfilled AAMI/ESH/ISO universal validation standards, demonstrating a mean difference of 0.5 ± 7.7 mmHg for SBP and 0.4 ± 4.6 mmHg for DBP compared to auscultatory reference.

synapsesocial.com/papers/6a84656ec7e37ebe3168da80 https://doi.org/10.1097/mbp.0000000000000556

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Smartphone based blood pressure measurement: accuracy of the OptiBP mobile application according to the AAMI/ESH/ISO universal validation protocol

Discussion

Member takes

Implication

Study Design

Structured PICO

Main Result

Limitations

Cite This Study

Smartphone based blood pressure measurement: accuracy of the OptiBP mobile application according to the AAMI/ESH/ISO universal validation protocol

Discussion

Member takes

Implication

Study Design

Structured PICO

Main Result

Limitations

Cite This Study

Also Consider

Also Consider