March 13, 2006

Automated blood pressure measurement in routine clinical practice

Q: What is the clinical evidence from this study?

Study design: RCT. Population: Hypertension (n=50). Intervention: Automated blood pressure recorder (BpTRU) vs. Conventional mercury sphygmomanometer. Primary outcome: Mean systolic blood pressure (mmHg) (p=<0.001).

MMMartin G. MyersGeneral Cardiology

Key Result

Automated blood pressure measurements taken while the patient rested alone (142/80 mmHg) were significantly lower than manual mercury sphygmomanometer readings (163/86 mmHg, P<0.001).

Study Design

Type

RCT (n=50)

Randomization

Random order

Structured PICO

Does automated blood pressure measurement reduce the white-coat effect compared to a conventional mercury sphygmomanometer in patients with hypertension?

Population

50 patients (56% women, mean age 62) referred to a specialist for hypertension management, evaluated during their first visit.

Intervention

Automated blood pressure measurement using the BpTRU recorder (initial reading with observer present, followed by five readings resting quietly alone).

Comparator

Conventional mercury sphygmomanometer (manual blood pressure taken in duplicate).

Outcome

Blood pressure measurement values (mmHg).surrogate

Automated blood pressure measurement taken while the patient rests alone significantly reduces the white-coat effect compared to manual mercury sphygmomanometer readings.

Main Result

Absolute Event Rate: 142% vs 163%

p-value: p=<0.001

Abstract

OBJECTIVE: To compare blood pressure measurements taken in routine clinical practice using an automated recorder, the BpTRU (VSM MedTech Ltd, Coquitlam, Canada), with readings taken by a conventional mercury sphygmomanometer. METHODS: Fifty consecutive patients 28 women, 22 men; mean (+/-SD) age 62+/-16 years referred to a specialist for management of hypertension had blood pressure taken on the first visit in random order using both a mercury sphygmomanometer and an automated device. RESULTS: The mean initial automated reading (mmHg) taken with the observer present (162+/-27/85+/-12) was similar to the mean manual blood pressure taken in duplicate (163+/-23/86+12). Both values were higher (P<0.001) than the mean of the next five readings taken with the automated recorder when the patient was resting quietly alone (142+/-21/80+/-12). Women exhibited a greater fall in blood pressure with the automated device than men. CONCLUSIONS: Use of an automated blood pressure recorder can eliminate some of the white-coat effect associated with readings taken by a mercury sphygmomanometer.

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Cite This Study

Martin G. Myers (Mon,) conducted a rct in Hypertension (n=50). Automated blood pressure recorder (BpTRU) vs. Conventional mercury sphygmomanometer was evaluated on Mean systolic blood pressure (mmHg) (p=<0.001). Automated blood pressure measurements taken while the patient rested alone (142/80 mmHg) were significantly lower than manual mercury sphygmomanometer readings (163/86 mmHg, P<0.001).

synapsesocial.com/papers/6a209e20e307124fcfcd2f3e https://doi.org/https://doi.org/10.1097/01.mbp.0000200481.64787.c0

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