What does this research mean for the field?

A smartphone app-based blood pressure algorithm demonstrates small mean differences compared to conventional cuff-based measurements over two days, although its clinical utility is currently limited by a high rate of insufficient signal quality. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

March 19, 2022DiagnosticsOpen Access

Comparability of a Blood-Pressure-Monitoring Smartphone Application with Conventional Measurements—A Pilot Study

Q: What is the clinical evidence from this study?

Study design: Observational. Population: Arterial hypertension (n=50). Intervention: RIVA digital smartphone application (AppBP) vs. Conventional oscillometric cuff-based office blood pressure measurement (CuffBP). Primary outcome: Mean difference between calibrated smartphone app and cuff-based systolic blood pressure on Day 1 (MD 0.7 ± 9.4 mmHg, p=0.739).

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Key result

Smartphone-based blood pressure app shows no significant difference compared to standard cuff measurements.

MD 0.7 ± 9.4 mmHg
P=0.739
n=50

Why the study?

New cuffless technologies for blood pressure measurement offer possibilities to improve hypertension awareness and control, prompting comparison of a smartphone app-based algorithm with office blood pressure measurement.

Does a smartphone application (RIVA digital) accurately measure blood pressure compared to conventional oscillometric cuff-based measurements in patients referred for ambulatory blood pressure monitoring?

Study Design

Type

Observational (n=50)

Blinding

Double-blind

Multicenter

Structured PICO

Population

50 adult patients referred for ambulatory blood pressure measurement, of whom 48% were female and 76% had known hypertension, evaluated over two consecutive days.

Intervention

Smartphone application (RIVA digital) estimating blood pressure based on photoplethysmographic (PPG) waveforms acquired from the finger's arterial bed using the phone's camera, calibrated to a first cuff measurement.

Comparator

Conventional oscillometric cuff-based office blood pressure measurement (OBPM) using Welch Allyn Connex Spot Monitor.

Outcome

Mean difference and standard deviation between smartphone-based blood pressure (AppBP) and cuff-based blood pressure (CuffBP) for systolic and diastolic values.surrogate

Main Result

Mean Difference: 0.7

p-value: p=0.739

The RIVA Digital smartphone app shows promising agreement with oscillometric cuff-based blood pressure measurements, particularly for diastolic values, though a high rate of signal rejection limits its current clinical utility.

Limitations

High rate of insufficient signal quality leading to the exclusion of over 50% of app-based measurements
Small sample size that does not meet formal validation protocol requirements
Use of an oscillometric device for comparison instead of a gold-standard auscultatory method
Some participants had only one valid app-based measurement available
High proportion of recordings with insufficient quality (56.25% excluded)
Small sample size (pilot study)
Not a formal validation study
Oscillometric cuff used as reference instead of gold-standard auscultatory method

Discussion

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Implication

Signal quality issues preclude clinical use; leaves open the need for refined algorithms in prospective validation studies.

Cite This Study

Vischer et al. (2022) conducted an observational in Arterial hypertension (n=50). RIVA digital smartphone application (AppBP) vs. Conventional oscillometric cuff-based office blood pressure measurement (CuffBP) was evaluated on Mean difference between calibrated smartphone app and cuff-based systolic blood pressure on Day 1 (MD 0.7 ± 9.4 mmHg, p=0.739). The RIVA digital smartphone application showed no significant difference compared to conventional cuff-based measurements for systolic blood pressure on Day 1 (mean difference 0.7 ± 9.4 mmHg, p=0.739).

synapsesocial.com/papers/6a1c5c984ebd09f3dfa9c041 https://doi.org/10.3390/diagnostics12030749

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Ask AI

Bookmark

Comparability of a Blood-Pressure-Monitoring Smartphone Application with Conventional Measurements—A Pilot Study

Study Design

Structured PICO

Main Result

Limitations

Discussion

Implication

Cite This Study

Comparability of a Blood-Pressure-Monitoring Smartphone Application with Conventional Measurements—A Pilot Study

Study Design

Structured PICO

Main Result

Limitations

Discussion

Implication

Cite This Study

Also Consider

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