Tonometry-derived features showed superior performance compared to other feature groups and baselines, while younger and normotensive subjects had the most consistent readings across all feature groups.
A study from Microsoft Research, published in the July 2022 IEEE Journal of Biomedical and Health Informatics, highlighted to need for more demographically diverse populations and challenging evaluation settings when performing blood pressure (BP) estimation studies, and identified tonometry-derived features as the most accurate measures for cuffless BP monitoring.
Rebecca Mieloszyk, et al, measured the BP of 1,125 subjects (aged 21-85, 49.2% female, multiple hypertensive categories) in-lab over a 24-hour period with a subset also receiving ambulatory measurements.
They collected radial tonometry, photoplethysmography (PPG), electrocardiography (ECG) and accelerometry signals simultaneously with auscultatory or oscillometric references for systolic (SBP) and diastolic blood pressure (DBP). They evaluated predictive models to estimate BP using a variety of sensor-based feature groups against challenging baselines.
The researchers found that tonometry-derived features showed superior performance compared to other feature groups and baselines, yielding prediction errors of 0.32±9.8 mmHg SBP and 0.54±7.7 mmHg DBP in-lab, and 0.86±8.7 mmHg SBP and 0.75±5.9 mmHg DBP for 24-hour averages.
Younger and normotensive subjects had the most consistent readings across all feature groups and showed the lowest SBP error standard deviation (SD). SBP SD was further reduced 15–20% when constrained to the calibration posture alone. Reference type, posture relative to calibration and controlled vs. ambulatory setting all significantly impacted BP errors.
Based on these findings, the authors concluded that there is a need for more demographically diverse populations and challenging evaluation settings for BP estimation studies.
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Tony Blank is president of Infinity Biomedical Group. He is formerly the cofounder of Barton & Blank, a regulatory consulting firm specializing in providing strategic and tactical regulatory support for medical devices and combination products. Immediately prior to forming Barton & Blank, Blank spent 12 years at Boston Scientific Corp. in both corporate and business regulatory leadership roles. Under his leadership of the cardiovascular regulatory teams, Boston Scientific obtained numerous regulatory approvals for cardiovascular medical devices and combination products—among these being worldwide regulatory approvals for drug-eluting stents, implantable cardioverter defibrillators (ICD) and cardiac resynchronization therapy defibrillators (CRT-D), cardiac pacemakers and cardiac resynchronization therapy pacemakers (CRT-P), and detachable coils for peripheral embolization. Blank has likewise been an active representative for Boston Scientific, the medical device industry and the regulatory profession on numerous policy issues working with AdvaMed. Among these activities has been participation in numerous Industry Working Groups—including the Pediatric Devices, Advertising and Promotion, and Reprocessing Working Groups (each of which he co-chaired). He is very involved in developing and delivering meaningful educational programs in the field of regulatory affairs and has been a regular speaker at educational events. In addition to his time at Boston Scientific, Blank has worked with cardiopulmonary, surgical, ophthalmic, vascular access and critical care medical devices.
Pat Baird works at Philips as the head of global software standards. Baird likes to think of his job as “policy engineering”— understanding the unmet needs (and frustrations) of regulators and developers, and working to develop standards, whitepapers and training to meet those needs. Past roles have included software developer, engineering manager, project manager, lead engineer, and most recently he was the director of risk management at Baxter Healthcare. Drawing on 20 years’ experience in product development, he has published and presented more than 50 papers regarding product development. Baird has an MBA and a Masters in healthcare quality and patient safety from Northwestern University.
Twice awarded IVT’s Speaker of the Year, Roberta Goode is the founder of Goode Compliance, where she created more than 350 jobs, forming an astonishingly talented team of biomedical engineers. After she and her team remediated enforcement actions for the world’s largest medical device manufacturers, Goode turned her attention to sharing that wealth of accumulated knowledge. Look for her in 2018 in a technical training and mentoring role as the head of Altrec, LLC.
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Susan Alpert, M.D. is president of SFA Consulting, LLC. She previously served as senior vice president, chief regulatory officer at Medtronic and was responsible for all of the company’s global regulatory efforts. Prior to joining Medtronic, Alpert served as vice president of regulatory sciences for C.R. Bard, Inc. She also previously worked at FDA where she held a variety of positions in the Centers dealing with drugs, devices and radiological health, and foods, including six years as the director of the Office of Device Evaluation.
Alpert is a microbiologist and a pediatrician with a specialty in infectious diseases and has practical experience in laboratory research and clinical trials. She serves on the board of advisors for the Medical Technology Leadership Forum and the board of the Women Business Leaders, or organization of women leaders in the health care sector. She also serves on the Executive Committee of the Clinical Trials Transformation Initiative, one of the public/private partnerships working with FDA to streamline the development of medical products.
Dr. Christopher Joseph Devine is the president of Devine Guidance International, a consulting firm specializing in providing solutions for regulatory compliance, quality, supplier management, and supply-chain issues facing the device industry. Devine has 32 years of experience in quality assurance, regulatory compliance and program management. He is a senior member of the American Society for Quality (ASQ), a member of the Regulatory Affairs Professionals Society (RAPS), and a member of the Project Management Institute, and resides on several technical advisory boards. Devine received his doctorate from Northcentral University, with his doctoral dissertation titled, “Exploring the Effectiveness of Defensive-Receiving Inspection for Medical Device Manufacturers: A Mixed-Method Study.” Devine holds a graduate degree in organizational management (MAOM) and an undergraduate degree in business management (BSBM).
Mark Leimbeck is the principal of UL Solutions Risk Management Practice. He has served as a subject matter expert and advisor in a number of functional areas, including risk management, quality management, project management, software application development, and engineering. During his career, Leimbeck has led and supported the implementation of various corporate improvement and development programs including quality system and regulatory compliance programs, new product development, IT systems and enterprise resource planning (ERP) implementation, and quality/lean Six Sigma process improvement projects. Leimbeck continues in a subject matter and advisory role, and participates in international, national and industry-based standards and guidance development committees. He holds a B.S. E.E.T. from Southern Illinois University and an M.B.A from the University of Chicago.
Stephen Wilcox, Ph.D., FIDSA is a principal and the founder of Design Science (Philadelphia), a 30+ person firm that specializes in optimizing the usability of products, particularly medical devices for clients including many major multinational corporations. Wilcox is a member of the Industrial Designers Society of America’s (IDSA) Academy of Fellows. He also served for several years as Chair of the IDSA Human Factors Professional Interest Section.
Wilcox also serves on the Advisory Boards of the Industrial Design Department of Philadelphia University and the School of Design of Carnegie Mellon University, on the Human Factors Engineering Committee of AAMI, and on the ISO/IEC committee (“Working Group 4”) that wrote the standard, IEC/ISO 62366. He holds a BS in psychology and anthropology from Tulane University, a Ph.D. in experimental psychology from Penn State, and a Certificate in Business Administration from the Wharton School of the University of Pennsylvania. He has won a number of design awards, has guest edited the journal Innovation several times and has served as a judge for a number of product design award competitions.
Wilcox has given hundreds of invited addresses to various organizations, has published more than 70 articles in professional journals, and is the current Editor in Chief of the Human Factors and Ergonomics Society journal, Ergonomics in Design. His book, Designing Usability into Medical Products (CRC/Taylor & Francis), co-authored with Michael Wiklund, was published in 2005.
Alberto Velez is a consultant for Chimera Consulting North America, LLC. Velez is a recognized expert in organization development for combination products with more than 12 years of experience in applying CGMP concepts to more than 35 combination products in new product development, manufacturing and quality systems. He is a frequent speaker on combination products topics at industry meetings and has more than 30 years of varied experience in medical device and combination product quality assurance, FDA readiness, product development and organizational effectiveness in the pharmaceutical and medical device industries. Velez has applied the CGMP’s/QSR’s to several different divisions in the Johnson & Johnson family of companies as well as other smaller medical device companies. He has also led R&D teams to develop and launch new technologies in endoscopic surgery and enteral feeding. His educational background is in chemical engineering, industrial engineering and quality engineering.
John Pracyk, is a rare Neurological Surgeon with an uncommon blend of business and medical expertise. This sophisticated futurist is recognized as a national thought leader in the design, development, and management of collaborative care delivery based on his history of healthcare program build-outs and medical administration successes. An accomplished writer and platform speaker, he is a frequently requested keynote speaker at prestigious organizations such as the Congress of Neurological Surgeons, The Barrow Neurological Institute, and Stryker Performance Solutions.
Having completed a healthcare-focused MBA from the nation’s preeminent physician-only degree program, with a Master’s thesis on competitive strategy and service-line development, Dr. Pracyk is a proactive innovator who inspires teams to surpass organizational goals, exceed patient care metrics, and enable transformational change. Healthgrades acknowledged him with their honor roll distinction.
His career to date has been characterized by three key elements: First, his ability to foster multidisciplinary consensus and collaborative care; second, his grasp of competitive strategy as a program architect; and third, his ethics-driven approach to medicine. While recognizing that revenue generation drives business, Dr. Pracyk balances business necessities with patient care and market realities. In 2016, Johnson & Johnson Medical Devices appointed him Franchise (Worldwide) Medical Director for Spine.
Patrick Caines is director, quality & post-market surveillance at Baxter Healthcare where he is responsible for the company’s global post-market surveillance and associated quality systems. Caines has 20 years’ experience in quality systems and compliance for both medical devices and clinical diagnostics and served as director, corporate post-market surveillance at General Electric Healthcare and Boston Scientific, and director of worldwide customer quality at Johnson and Johnson. Caines began his career as a hospital-based clinical laboratory scientist and held faculty appointments at the University of Windsor and Wayne State University. He holds a Ph.D. in clinical biochemistry from the University of Windsor, Ontario, Canada as well as an MBA from St. John Fisher College, Rochester, New York.
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