What question did this study set out to answer?

This research aims to evaluate the accuracy of a new portable device for measuring ambulatory blood pressure in comparison to traditional methods.

April 1, 1990American Journal of HypertensionOpen Access

Determination of Clinical Accuracy and Nocturnal Blood Pressure Pattern by New Portable Device for Monitoring Indirect Ambulatory Blood Pressure

Q: What is the clinical evidence from this study?

Study design: Observational. Intervention: ABPM 630 portable device vs. Auscultatory method and UBP-100 finger volume-oscillometric device. Primary outcome: Nighttime average systolic blood pressure (p=<0.01).

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Key result

The ABPM 630 portable device recorded significantly higher nighttime systolic blood pressure than a finger volume-oscillometric device (117 vs 108 mm Hg; P<0.01) and frequently interrupted sleep.

Why the study?

Does the ABPM 630 portable device accurately measure ambulatory blood pressure compared to auscultatory and finger volume-oscillometric methods?

Population

40 untreated subjects for 24-hour monitoring, with additional measurements for auscultatory comparison

Comparison

Ambulatory blood pressure monitoring using the… vs Auscultatory method and finger…

Design

Cross-sectional

Follow-up

24 hours

Authors

YIYutaka ImaiUniversity College Dublin KAK. AbeOtsuka (Japan)SSSho SasakiFukushima Medical University

Discussion

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Implication

May overestimate nocturnal SBP and disrupt sleep; leaves open validation of ABPM 630 versus reference methods before clinical use.

Key Points

This research aims to evaluate the accuracy of a new portable device for measuring ambulatory blood pressure in comparison to traditional methods.
Compared BP measurements from the new device (ABPM 630) with the auscultatory method in 256 subjects.
Monitored BP over 24 hours in 40 untreated subjects using both ABPM 630 and a finger volume-oscillometric device.
Analyzed mean differences in systolic and diastolic BP between devices.
Mean difference for SBP from the auscultatory method was -0.28 +/- 6.15 mm Hg (n=256).
Nighttime average SBP measured by ABPM 630 (117 +/- 9.7 mm Hg) was significantly higher than that measured by the finger device (108 +/- 14.1 mm Hg, P<0.01).
Only 4 subjects reported no sleep disturbances, indicating potential discomfort with the arm-cuff inflation.

Study Design

Type

Observational (n=40)

Structured PICO

Does the ABPM 630 portable device accurately measure ambulatory blood pressure compared to auscultatory and finger volume-oscillometric methods?

Population

40 untreated subjects for 24-hour monitoring, with additional measurements (n=256 and n=297) for auscultatory comparison

Intervention

Ambulatory blood pressure monitoring using the ABPM 630 portable device (cuff-oscillometric and microphone technique)

Comparator

Auscultatory method (for accuracy) and finger volume-oscillometric device (UBP-100) (for 24-hour monitoring)

Outcome

Mean difference in systolic and diastolic blood pressure compared to auscultatory method, and 24-hour blood pressure patternsurrogate

Main Result

Absolute Event Rate: 117% vs 108%

p-value: p=<0.01

The ABPM 630 device provides accurate daytime blood pressure measurements but frequently causes sleep disturbance and may overestimate nighttime blood pressure compared to finger volume-oscillometric devices.

Limitations

Sleep disturbance and frequent interruption caused by the arm-cuff inflation

Cite This Study

Imai et al. (1990) reported an observational. ABPM 630 portable device vs. Auscultatory method and UBP-100 finger volume-oscillometric device was evaluated on Nighttime average systolic blood pressure (p=<0.01). The ABPM 630 portable device recorded significantly higher nighttime systolic blood pressure than a finger volume-oscillometric device (117 vs 108 mm Hg; P<0.01) and frequently interrupted sleep.

synapsesocial.com/papers/6a09e72c16dfdfe7ed3473bd https://doi.org/10.1093/ajh/3.4.293

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Determination of Clinical Accuracy and Nocturnal Blood Pressure Pattern by New Portable Device for Monitoring Indirect Ambulatory Blood Pressure

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Main Result

Limitations

Cite This Study

Determination of Clinical Accuracy and Nocturnal Blood Pressure Pattern by New Portable Device for Monitoring Indirect Ambulatory Blood Pressure

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Main Result

Limitations

Cite This Study

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