Can a simulator that regenerates physiological waveforms evaluate oscillometric non-invasive blood pressure devices?

Area of Science:

• Biomedical Engineering
• Medical Device Technology
• Clinical Measurement

Background:

• A novel simulator was developed to regenerate recorded clinical oscillometric waveforms.
• This simulator enables testing of oscillometric non-invasive blood pressure (NIBP) measurement devices.
• The study assesses the utility of this simulator for NIBP device evaluations.

Purpose of the Study:

• To evaluate two NIBP devices using a simulator with a database of 243 clinical oscillometric waveforms.
• To determine the value of a waveform simulator in assessing NIBP device accuracy.
• To compare simulator-based results against established validation standards and protocols.

Main Methods:

• Two previously validated NIBP devices (Omron HEM-907 and GE ProCare 400) were selected.
• Devices were connected to the simulator, and pressures were recorded using 243 regenerated waveforms.
• Paired pressure differences (NIBP device vs. auscultatory reference) were calculated and assessed against European, American, and British Hypertension Society standards.

Main Results:

• Both NIBP devices partially met, but did not fully comply with, the validation standards and protocol.
• Omron HEM-907: Mean systolic difference -2.4 mmHg (+/-5.9 mmHg), mean diastolic difference -8.9 mmHg (+/-6.5 mmHg).
• GE ProCare 400: Mean systolic difference -6.5 mmHg (+/-10.4 mmHg), mean diastolic difference -2.9 mmHg (+/-7.0 mmHg).

Conclusions:

• This is the first study to evaluate NIBP devices using a simulator with regenerated clinical oscillometric waveforms.
• Despite prior clinical validation, both devices showed only partial compliance with standards when tested via the simulator.
• The simulator shows potential to replace challenging and costly clinical evaluations, facilitating broader NIBP device assessment.