Physiology-based patient simulator for blood pressure meter testing

Geršak, Gregor; Schiebl, M.; Nawotka, Michał; Jugo, Ehlimana; Ferreira, Maria do Céu; Duffy, Alan; Rosu, Dana Maria; Pavlasek, P.; Sedlák, Václav; Pražák, Dominik

doi:10.1016/j.measen.2021.100260

Cited by 6 publications

(5 citation statements)

References 5 publications

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“…However, these simulators generate signals only similar to the physiological ones and they use proprietary algorithms to generate these signals as well. Due to their limitations, they are currently only recommended for evaluating the repeatability and stability of SM, investigation on influence of environmental conditions of SMs, but not the accuracy of measurement [10].…”

Section: Blood Pressure Simulatorsmentioning

confidence: 99%

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Evaluation of Sphygmomanometers Using an Advanced Oscillometric Signal Generator

Sedlák¹,

Pražák²,

Tesař³

et al. 2023

Proceedings of the IMEKO TC11 Conference on Measurement in Testing, Inspection and Certification

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Reliable and accurate blood pressure measurements using sphygmomanometers are indispensable in the diagnostic and treatment of hypertension. Unfortunately, testing of performance and accuracy of automated oscillometric sphygmomanometers is complicated, lengthy and expensive.Fact that the oscillometric sphygmomanometers are majority of the blood pressure measuring devices on today's market makes the problem more pressing.EMPIR project adOSSIG built a physiologybased advanced blood pressure simulator with a goal of improving blood pressure measurements. This paper describes results of testing of sphygmomanometers using this newly developed simulator.

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Section: Blood Pressure Simulatorsmentioning

confidence: 99%

“…Additional testing of the aOSG was performed by the University of Ljubljana [10], where functionality was evaluated using a clinically validated SM and a commercially available blood pressure simulator for a comparison.…”

Section: Sphygmomanometer Evaluationmentioning

confidence: 99%

Evaluation of Sphygmomanometers Using an Advanced Oscillometric Signal Generator

Sedlák¹,

Pražák²,

Tesař³

et al. 2023

Proceedings of the IMEKO TC11 Conference on Measurement in Testing, Inspection and Certification

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show abstract

“…These have been limited assessments, primarily observing the simulator replaying to devices under test. Continued developments will ultimately allow all automated oscillometric sphygmomanometers to be evaluated with agreed and recognised extended data, enabling scientific comparisons (Gersak et al 2021). To encourage routine device testing there needs to be further assessment of the accuracy of reproduction of the clinical waveforms.…”

Section: Simulatorsmentioning

confidence: 99%

Technical evaluation of a simulator for accurate reproduction of oscillometric blood pressure pulses, providing traceability for automated oscillometric sphygmomanometers

Mieke,

Murray

2023

Biomed. Phys. Eng. Express

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Oscillometric blood pressure measurement devices are not directly traceable to primary standards. Currently, device accuracy is measured by comparison between a sample device and reference measurements in a clinical trial. We researched in this study the potential for an alternative evaluation with a simulator. Our research simulator was studied for repeatability and accuracy in delivering simulated blood pressure pulses. Clinical cuff pressure measurements were obtained, along with simultaneous recordings of oscillometric pulse waveforms, spanning the clinical range of cuff pressures, pulse intervals and pulse shapes. Oscillometric pulse peak amplitudes ranged from 1.1 to 3.6 mmHg. Simulated repeatability results showed an average Standard Deviation (SD) for pulse peaks of 0.018 mmHg; 1.0% of peak amplitudes. Comparing simulated pulse shapes, the average repeat SD was 0.015 mmHg; 0.8% of the normalised pulse shapes. The simulated accuracy results had a mean error of -0.014±0.042 mmHg with a mean accuracy of 97.8%. For pulse shape the corresponding values were 0.104±0.071 mmHg with a mean accuracy of 95.4%. The correlation between the reference and simulated pulse shapes ranged from 0.991 to 0.996 (all p<0.00003), with a mean 0.994. We conclude that oscillometric pulses can be reproduced with high repeatability and high accuracy with our research simulator. The extended uncertainty U(psim) = 0.3 mmHg for the simulated pulses is dominated by the uncertainty (64%) of the clinical reference data. These results underpin the potential of the simulator to become a secondary standard for millions of oscillometric sphygmomanometers.

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“…Even though the LF sound source was using a 200 W speaker in an enclosed system, it was still not powerful enough to generate the required pressure values. To test the RF microphone measuring system under actual high-pressure conditions, we needed to utilize a BP simulator, an electro-mechanical device for testing oscillometric BP monitors [33,34].…”

Section: Testing the System Using A Blood Pressure Simulatormentioning

confidence: 99%

Sphygmomanometer Dynamic Pressure Measurement Using a Condenser Microphone

Tomazini,

Geršak,

Beguš

2023

Sensors

Self Cite

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There is a worldwide need to improve blood pressure (BP) measurement error in order to correctly diagnose hypertension. Cardiovascular diseases cause 17.9 million deaths annually and are a substantial monetary strain on healthcare. The current measurement uncertainty of 3 mmHg should be improved upon. Dynamic pressure measurement standards are lacking or non-existing. In this study we propose a novel method of measuring air pressure inside the sphygmomanometer tubing during BP measurement using a condenser microphone. We designed, built, and tested a system that uses a radiofrequency (RF) modulation method to convert changes in capacitance of a condenser microphone into pressure signals. We tested the RF microphone with a low-frequency (LF) sound source, BP simulator and using a piezoresistive pressure sensor as a reference. Necessary tests were conducted to assess the uncertainty budget of the system. The RF microphone prototype has a working frequency range from 0.5 Hz to 280 Hz in the pressure range from 0 to 300 mmHg. The total expanded uncertainty (k = 2, p = 95.5%) of the RF microphone was 4.32 mmHg. The proposed method could establish traceability of BP measuring devices to acoustic standards described in IEC 61094-2 and could also be used in forming dynamic BP standards.

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Physiology-based patient simulator for blood pressure meter testing

Cited by 6 publications

References 5 publications

Evaluation of Sphygmomanometers Using an Advanced Oscillometric Signal Generator

Evaluation of Sphygmomanometers Using an Advanced Oscillometric Signal Generator

Technical evaluation of a simulator for accurate reproduction of oscillometric blood pressure pulses, providing traceability for automated oscillometric sphygmomanometers

Sphygmomanometer Dynamic Pressure Measurement Using a Condenser Microphone

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