Measurement Accuracy of a Stand-Alone Oscillometric Central Blood Pressure Monitor: A Validation Report for Microlife WatchBP Office Central

Cheng, Hao Min; Sung, Shih Hsien; Shih, Yuan Ta; Chuang, Shao Yuan; Yu, Wen Chung; Chen, Chen Huan

doi:10.1093/ajh/hps021

Cited by 40 publications

(28 citation statements)

References 33 publications

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“…In the literature, there are 15 studies referenced in PubMed on the evaluation of oscillometric devices to assess systolic cBP [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. It includes eight devices and they have all been published in the last 5 years, with more than half of them since 2012.…”

Section: Discussionmentioning

confidence: 99%

“…Some use a device-specific transfer function applied to the brachial oscillometric tracing [16,[18][19][20][21]24,25]; others apply wave analysis to derive cBP [17,22,23,[26][27][28][29][30]. Many use the brachial oscillometric approach to estimate systolic cBP as oscillometric traces are easy to obtain with a standard cuff and are operator independent.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of central blood pressure devices on the basis of a modified protocol of the European Society of Hypertension

Agnoletti

Millasseau²,

Topouchian³

et al. 2014

Blood Pressure Monitoring

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of central blood pressure devices on the basis of a modified protocol of the European Society of Hypertension

Agnoletti

Millasseau²,

Topouchian³

et al. 2014

Blood Pressure Monitoring

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“…The patient characteristics and study procedures are described in detail elsewhere [10], [11]. Information relevant to the present study is briefly described below.…”

Section: Methodsmentioning

confidence: 99%

Patient-Specific Oscillometric Blood Pressure Measurement

Liu

Cheng²,

Chen³

et al. 2016

IEEE Trans. Biomed. Eng.

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Objective Most automatic cuff blood pressure (BP) measurement devices are based on oscillometry. These devices estimate BP from the envelopes of the cuff pressure oscillations using fixed ratios. The values of the fixed ratios represent population averages, so the devices may only be accurate in subjects with normal BP levels. The objective was to develop and demonstrate the validity of a patient-specific oscillometric BP measurement method. Methods The idea of the developed method was to represent the cuff pressure oscillation envelopes with a physiologic model and then estimate the patient-specific parameters of the model, which includes BP levels, by optimally fitting it to the envelopes. The method was investigated against gold standard reference BP measurements from 57 patients with widely varying pulse pressures. A portion of the data was used to optimize the patient-specific method and a fixed-ratio method, while the remaining data were used to test these methods and a current office device. Results The patient-specific method yielded BP root-mean-square-errors ranging from 6.0 to 9.3 mmHg. On average, these errors were nearly 40% lower than the errors of each existing method. Conclusion The patient-specific method may improve automatic cuff BP measurement accuracy. Significance A patient-specific oscillometric BP measurement method was proposed and shown to be more accurate than the conventional method and a current device.

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“…When sufficient PWFs are obtained and analyzed, the cSBP and cPP are directly calculated [18]. The DBP is not provided and can be calculated as cSBP - cPP [19,20]. …”

Section: Watchbp Office Centralmentioning

confidence: 99%

“…However, currently there are no standardized validation methods for noninvasive central BP monitors although an international task force has been convened to address this issue. Therefore, for the validation of the WatchBP Office Central the most rigorous approach was chosen; 85 subjects were recruited according to the recommendations for noninvasive validation, and all requirements for the invasive reference standard were also fulfilled [20]. IBP was measured using a fluid-filled catheter which was advanced to the ascending aorta via the right radial artery and placed 2 cm above the aortic valve.…”

Section: Validationmentioning

confidence: 99%

Practical Suitability of a Stand-Alone Oscillometric Central Blood Pressure Monitor: A Review of the Microlife WatchBP Office Central

Verberk

Cheng

Huang³

et al. 2015

Pulse

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Accumulating evidence indicates that central blood pressure (CBP) is a better cardiovascular risk predictor than brachial blood pressure (BP). Although more additional benefits of CBP-based treatment above usual hypertension treatment are to be demonstrated, the demand for implementing CBP assessment in general clinical practice is increasing. For this, the measurement procedure must be noninvasive, easy to perform, and cost- and time-efficient. Therefore, oscillometric devices with the possibility to assess CBP seem the best option. Recently, such an oscillometric BP monitor, the Microlife WatchBP Office Central, was developed, which demonstrated its high accuracy in a validation study against invasive BP measurement. Calibration errors of this device are limited because the procedure is automated, standardized, and performed at the same place of and within 30 s from pulse wave assessment. The transformation from the peripheral pulse wave to CBP is done by means of an individual-based pulse wave analysis according to a theory of arterial compliance and wave reflections. In addition, the device has demonstrated to enable a more reliable diagnosis of hypertension by CBP than by peripheral BP, with a lower frequency of over- and underdiagnosis. Altogether, the available clinical evidence suggests that the Microlife WatchBP Office Central fulfills the criteria for general clinical use.

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Measurement Accuracy of a Stand-Alone Oscillometric Central Blood Pressure Monitor: A Validation Report for Microlife WatchBP Office Central

Abstract: Central SBP, PP, and DBP can be measured accurately by a stand-alone automatic BP monitor.

Cited by 40 publications

References 33 publications

Comparison of central blood pressure devices on the basis of a modified protocol of the European Society of Hypertension

Comparison of central blood pressure devices on the basis of a modified protocol of the European Society of Hypertension

Patient-Specific Oscillometric Blood Pressure Measurement

Practical Suitability of a Stand-Alone Oscillometric Central Blood Pressure Monitor: A Review of the Microlife WatchBP Office Central

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