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Baranger J, Villemain O, Goudot G, Dizeux A, Le Blay H, Mirault T, Messas E, Pernot M, Tanter M. The fundamental mechanisms of the Korotkoff sounds generation. SCIENCE ADVANCES 2023; 9:eadi4252. [PMID: 37792931 PMCID: PMC10550233 DOI: 10.1126/sciadv.adi4252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 09/05/2023] [Indexed: 10/06/2023]
Abstract
Blood pressure measurement is the most widely performed clinical exam to predict mortality risk. The gold standard for its noninvasive assessment is the auscultatory method, which relies on listening to the so-called "Korotkoff sounds" in a stethoscope placed at the outlet of a pneumatic arm cuff. However, more than a century after their discovery, the origin of these sounds is still debated, which implies a number of clinical limitations. We imaged the Korotkoff sound generation in vivo at thousands of images per second using ultrafast ultrasound. We showed with both experience and theory that Korotkoff sounds are paradoxically not sound waves emerging from the brachial artery but rather shear vibrations conveyed in surrounding tissues by the nonlinear pulse wave propagation. When these shear vibrations reached the stethoscope, they were synchronous, correlated, and comparable in intensity with the Korotkoff sounds. Understanding this mechanism could ultimately improve blood pressure measurement and provide additional understanding of arterial mechanical properties.
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Affiliation(s)
- Jerome Baranger
- Physics for Medicine Paris, Inserm, ESPCI PSL Paris, CNRS, Paris, France
| | - Olivier Villemain
- Physics for Medicine Paris, Inserm, ESPCI PSL Paris, CNRS, Paris, France
| | - Guillaume Goudot
- Physics for Medicine Paris, Inserm, ESPCI PSL Paris, CNRS, Paris, France
- Université Paris Cité, Inserm UMR 970, PARCC, Vascular Medicine Department, Hôpital Européen Georges-Pompidou, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Alexandre Dizeux
- Physics for Medicine Paris, Inserm, ESPCI PSL Paris, CNRS, Paris, France
| | - Heiva Le Blay
- Physics for Medicine Paris, Inserm, ESPCI PSL Paris, CNRS, Paris, France
| | - Tristan Mirault
- Université Paris Cité, Inserm UMR 970, PARCC, Vascular Medicine Department, Hôpital Européen Georges-Pompidou, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Emmanuel Messas
- Université Paris Cité, Inserm UMR 970, PARCC, Vascular Medicine Department, Hôpital Européen Georges-Pompidou, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Mathieu Pernot
- Physics for Medicine Paris, Inserm, ESPCI PSL Paris, CNRS, Paris, France
| | - Mickael Tanter
- Physics for Medicine Paris, Inserm, ESPCI PSL Paris, CNRS, Paris, France
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2
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Kumar Y, Singh PK, Chaudhry D, Sharma A, Yadav P. Comprehensive diagnostic evaluation of palpatory method of blood pressure measurement. Eur J Intern Med 2023; 115:154-156. [PMID: 37268520 DOI: 10.1016/j.ejim.2023.05.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/12/2023] [Accepted: 05/23/2023] [Indexed: 06/04/2023]
Affiliation(s)
- Yogita Kumar
- Department of Pulmonary & Critical Care Medicine, Pt BDS Post-Graduate Institute of Medical Sciences, Rohtak, Haryana 124001, India
| | - Pawan Kumar Singh
- Department of Pulmonary & Critical Care Medicine, Pt BDS Post-Graduate Institute of Medical Sciences, Rohtak, Haryana 124001, India.
| | - Dhruva Chaudhry
- Department of Pulmonary & Critical Care Medicine, Pt BDS Post-Graduate Institute of Medical Sciences, Rohtak, Haryana 124001, India
| | - Amit Sharma
- Department of Pulmonary & Critical Care Medicine, Pt BDS Post-Graduate Institute of Medical Sciences, Rohtak, Haryana 124001, India
| | - Pooja Yadav
- Department of Pulmonary & Critical Care Medicine, Pt BDS Post-Graduate Institute of Medical Sciences, Rohtak, Haryana 124001, India
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3
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Liu Z, Zhou C, Wang H, He Y. Blood pressure monitoring techniques in the natural state of multi-scenes: A review. Front Med (Lausanne) 2022; 9:851172. [PMID: 36091712 PMCID: PMC9462511 DOI: 10.3389/fmed.2022.851172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Accepted: 08/11/2022] [Indexed: 11/17/2022] Open
Abstract
Blood pressure is one of the basic physiological parameters of human physiology. Frequent and repeated measurement of blood pressure along with recording of environmental or other physiological parameters when measuring blood pressure may reveal important cardiovascular risk factors that can predict occurrence of cardiovascular events. Currently, wearable non-invasive blood pressure measurement technology has attracted much research attention. Several different technical routes have been proposed to solve the challenge between portability or continuity of measurement methods and medical level accuracy of measurement results. The accuracy of blood pressure measurement technology based on auscultation and oscillography has been clinically verified, while majority of other technical routes are being explored at laboratory or multi-center clinical demonstration stage. Normally, Blood pressure measurement based on oscillographic method outside the hospital can only be measured at intervals. There is a need to develop techniques for frequent and high-precision blood pressure measurement under natural conditions outside the hospital. In this paper, we discussed the current status of blood pressure measurement technology and development trends of blood pressure measurement technology in different scenarios. We focuses on the key technical challenges and the latest advances in the study of miniaturization devices based on oscillographic method at wrist and PTT related method at finger positions as well as technology processes. This study is of great significance to the application of high frequency blood pressure measurement technology.
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Affiliation(s)
- Ziyi Liu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
- Guangdong Transtek Medical Electronics Co., Ltd., Zhongshan, China
| | - Congcong Zhou
- Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Biosensor National Special Laboratory, College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou, China
| | - Hongwei Wang
- Tongde Hospital of Zhejiang Province, Hangzhou, China
- *Correspondence: Hongwei Wang,
| | - Yong He
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
- Yong He,
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4
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Diamond-like Carbon Coatings in the Biomedical Field: Properties, Applications and Future Development. COATINGS 2022. [DOI: 10.3390/coatings12081088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Repairment and replacement of organs and tissues are part of the history of struggle against human diseases, in addition to the research and development (R&D) of drugs. Acquisition and processing of specific substances and physiological signals are very important to understand the effects of pathology and treatment. These depend on the available biomedical materials. The family of diamond-like carbon coatings (DLCs) has been extensively applied in many industrial fields. DLCs have also been demonstrated to be biocompatible, both in vivo and in vitro. In many cases, the performance of biomedical devices can be effectively enhanced by coating them with DLCs, such as vascular stents, prosthetic heart valves and surgical instruments. However, the feasibility of the application of DLC in biomedicine remains under discussion. This review introduces the current state of research and application of DLCs in biomedical devices, their potential application in biosensors and urgent problems to be solved. It will be useful to build a bridge between DLC R&D workers and biomedical workers in order to develop high-performance DLC films/coatings, promote their practical use and develop their potential applications in the biomedical field.
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5
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Vigato ES, Souza MCD, Dordetto PR, Lamas JLT. Evaluation of oscillometric blood pressure measurement devices available for online sale. Rev Bras Enferm 2022; 75:e20210658. [DOI: 10.1590/0034-7167-2021-0658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 12/22/2021] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Objectives: to characterize oscillometric blood pressure measurement devices for sale in the virtual market and identify which ones have undergone a validation study. Methods: this was a cross sectional study. The search for devices for sale was conducted on websites, and the sample was composed of 137 devices obtained from 644 ads. We conducted a bibliographic survey in five databases and web pages enlisting devices submitted for validation. The Kolmogorov-Smirnov test was used to check data distribution, followed by Mann-Whitney and Kruskal-Wallis tests for comparisons, using the SAS 9.4 program. Results: only 16.7% of the devices were validated. The home devices ranged from USD 10.57 to USD 275.67. Only 102 ads informed the cuff size, with different nomenclatures. Conclusions: most ads contained non-validated devices, which were cheaper. We identified some ads falsely informing validation.
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6
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Silva AFRD, Cruz RC, Albuquerque NLSD, Silva VMD, Araujo TLD. Blood pressure variability in individuals with diabetes mellitus: a scoping review. Rev Bras Enferm 2022; 75:e20210804. [DOI: 10.1590/0034-7167-2021-0804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 02/07/2022] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Objectives: to map methods and devices used to assess very short-, short-, medium-, and long-term pressure variability in adults with type 1 or 2 diabetes mellitus. Methods: scoping review conducted in January and February 2021 in MEDLINE, Web of Science, CINAHL, LILACS, PubMed, and Embase databases. Studies conducted within the last ten years analyzing pressure variability in adult and older patients with diabetes mellitus type 1 or 2 were included. Studies that used discontinued devices were excluded. Results: the sample was composed of 25 articles published since 2017, with the majority developed in Japan (n=11); with the predominance of the oscillometric method (n=22); the most used devices were from the Omron® brand (n=14); the most detected type was long-term variability (n=10). Conclusions: we observed the increasing application of the oscillometric method for pressure variability analysis with various brands and models of automatic devices.
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Al-harosh M, Yangirov M, Kolesnikov D, Shchukin S. Bio-Impedance Sensor for Real-Time Artery Diameter Waveform Assessment. SENSORS 2021; 21:s21248438. [PMID: 34960542 PMCID: PMC8709432 DOI: 10.3390/s21248438] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/08/2021] [Accepted: 12/15/2021] [Indexed: 01/21/2023]
Abstract
The real-time artery diameter waveform assessment during cardio cycle can allow the measurement of beat-to-beat pressure change and the long-term blood pressure monitoring. The aim of this study is to develop a self-calibrated bio-impedance-based sensor, which can provide regular measurement of the blood-pressure-dependence time variable parameters such as the artery diameter waveform and the elasticity. This paper proposes an algorithm based on analytical models which need prior geometrical and physiological patient parameters for more appropriate electrode system selection and hence location to provide accurate blood pressure measurement. As a result of this study, the red cell orientation effect contribution was estimated and removed from the bio-impedance signal obtained from the artery to keep monitoring the diameter waveform correspondence to the change of blood pressure.
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8
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Desebbe O, Tighenifi A, Jacobs A, Toubal L, Zekhini Y, Chirnoaga D, Collange V, Alexander B, Knebel JF, Schoettker P, Joosten A. Evaluation of a novel mobile phone application for blood pressure monitoring: a proof of concept study. J Clin Monit Comput 2021; 36:1147-1153. [PMID: 34409513 DOI: 10.1007/s10877-021-00749-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 08/12/2021] [Indexed: 10/20/2022]
Abstract
To provide information about the clinical relevance of blood pressure (BP) measurement differences between a new smartphone application (OptiBP™) and the reference method (automated oscillometric technique) using a noninvasive brachial cuff in patients admitted to the emergency department. We simultaneously recorded three BP measurements using both the reference method and the novel OptiBP™ (test method), except when the inter-arm difference was > 10 mmHg BP. Each OptiBP™ measurement required 1-min and the subsequent reference method values were compared to the values obtained with OptiBP™ using a Bland-Altman analysis and error grid analysis. Among the 110 patients recruited, OptiBP™ BP values could be collected on 61 patients (55%) and were included in the statistical analysis. The mean of differences (95% limits of agreement) between the reference method and the test method were - 0.1(- 22.5 to 22.4 mmHg) for systolic arterial pressure (SAP), - 0.1(- 12.9 to 12.7 mmHg) for diastolic arterial pressure (DAP) and - 0.3(- 18.1 to 17.4 mmHg) for mean arterial pressure (MAP). The proportions of measurements in risk zones A-E were 86.9%, 13.1%, 0%, 0%, and 0% for MAP and 89.3%, 10.7%, 0%, 0%, and 0% for SAP. In this pilot study conducted in stable and awake patients admitted to the emergency department, the absolute agreement between the OptiBP™ and the reference method was moderate. However, when BP measurements were made immediately after an initial calibration, error grid analysis showed that 100% of measurement differences between the OptiBP™ and reference method were categorized as no- or low-risk treatment decisions for all patients.Trial Registration: ClinicalTrials.gov Identifier: NCT04121624.
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Affiliation(s)
- Olivier Desebbe
- Department of Anesthesiology and Perioperative Medicine Sauvegarde Clinic, Ramsay Santé, Lyon, France
| | | | - Alexandra Jacobs
- Department of Anesthesiology, Erasme Hospital, Université Libre de Bruxelles, 808 route de lennik, 1070, Brussels, Belgium
| | - Leila Toubal
- Department of Anesthesiology and Intensive Care, Hôpitaux Universitaires Paris-Sud, Université Paris-Sud, Université Paris-Saclay, Paul Brousse Hospital, Assistance Publique Hôpitaux de Paris (APHP), Villejuif, France
| | - Yassine Zekhini
- Department of Anesthesiology, Erasme Hospital, Université Libre de Bruxelles, 808 route de lennik, 1070, Brussels, Belgium
| | - Dragos Chirnoaga
- Department of Anesthesiology, Erasme Hospital, Université Libre de Bruxelles, 808 route de lennik, 1070, Brussels, Belgium
| | - Vincent Collange
- Department of Anesthesiology, Médipole Lyon Villeurbanne, Léon Blum, France
| | - Brenton Alexander
- Department of Anesthesiology, University of California San Diego, La Jolla, San Diego, CA, USA
| | | | - Patrick Schoettker
- Department of Anesthesiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Alexandre Joosten
- Department of Anesthesiology, Erasme Hospital, Université Libre de Bruxelles, 808 route de lennik, 1070, Brussels, Belgium. .,Department of Anesthesiology and Intensive Care, Hôpitaux Universitaires Paris-Sud, Université Paris-Sud, Université Paris-Saclay, Paul Brousse Hospital, Assistance Publique Hôpitaux de Paris (APHP), Villejuif, France.
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9
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Ion M, Dinulescu S, Firtat B, Savin M, Ionescu ON, Moldovan C. Design and Fabrication of a New Wearable Pressure Sensor for Blood Pressure Monitoring. SENSORS 2021; 21:s21062075. [PMID: 33809497 PMCID: PMC8000553 DOI: 10.3390/s21062075] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/05/2021] [Accepted: 03/11/2021] [Indexed: 01/28/2023]
Abstract
In recent years, research into the field of materials for flexible sensors and fabrication techniques directed towards wearable devices has helped to raise awareness of the need for new sensors with healthcare applicability. Our goal was to create a wearable flexible pressure sensor that could be integrated into a clinically approved blood pressure monitoring device. The sensor is built from a microfluidic channel encapsulated between two polymer layers, one layer being covered by metal transducers and the other being a flexible membrane containing the microfluidic channel, which also acts as a sealant for the structure. The applied external pressure deforms the channel, causing changes in resistance to the microfluidic layer. Electrical characterization has been performed in 5 different configurations, using alternating current (AC) and (DC) direct current measurements. The AC measurements for the fabricated pressure sensor resulted in impedance values at tens of hundreds of kOhm. Our sensor proved to have a high sensitivity for pressure values between 0 and 150 mm Hg, being subjected to repeatable external forces. The novelty presented in our work consists in the unique technological flow for the fabrication of the flexible wearable pressure sensor. The proposed miniaturized pressure sensor will ensure flexibility, low production cost and ease of use. It is made of very sensitive microfluidic elements and biocompatible materials and can be integrated into a wearable cuffless device for continuous blood pressure monitoring.
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10
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The Story of the Silent Killer : A History of Hypertension: Its Discovery, Diagnosis, Treatment, and Debates. Curr Hypertens Rep 2020; 22:72. [PMID: 32852612 DOI: 10.1007/s11906-020-01077-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Hypertension is the leading risk factor for death and disability-adjusted life-years lost globally. Despite this tremendous impact on health, blood pressure measurement and treatment are relatively new to medical practice, with widespread measurement beginning just over 100 years ago. How, in such a short time, did blood pressure become such an integral measurement in medical practice that it is now considered one of the vital signs? Key revelations through Stephen Hales and his horse experiment, Riva-Rocci's modern blood pressure cuff, Korotkoff sounds, and President Roosevelt's death set the stage for discovery. Landmark trials such as the VA Cooperative studies of the 1960s through the recent Systolic Blood Pressure Intervention Trial and Prevention with Mediterranean Diet trials provide the foundation for modern clinical practice. An understanding of the history of hypertension can directly affect current clinical practice and offers unique insights into how the medical community has approached the management of one of the deadliest medical conditions in history.
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11
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Al-Qatatsheh A, Morsi Y, Zavabeti A, Zolfagharian A, Salim N, Z. Kouzani A, Mosadegh B, Gharaie S. Blood Pressure Sensors: Materials, Fabrication Methods, Performance Evaluations and Future Perspectives. SENSORS (BASEL, SWITZERLAND) 2020; 20:E4484. [PMID: 32796604 PMCID: PMC7474433 DOI: 10.3390/s20164484] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 07/31/2020] [Accepted: 08/04/2020] [Indexed: 12/14/2022]
Abstract
Advancements in materials science and fabrication techniques have contributed to the significant growing attention to a wide variety of sensors for digital healthcare. While the progress in this area is tremendously impressive, few wearable sensors with the capability of real-time blood pressure monitoring are approved for clinical use. One of the key obstacles in the further development of wearable sensors for medical applications is the lack of comprehensive technical evaluation of sensor materials against the expected clinical performance. Here, we present an extensive review and critical analysis of various materials applied in the design and fabrication of wearable sensors. In our unique transdisciplinary approach, we studied the fundamentals of blood pressure and examined its measuring modalities while focusing on their clinical use and sensing principles to identify material functionalities. Then, we carefully reviewed various categories of functional materials utilized in sensor building blocks allowing for comparative analysis of the performance of a wide range of materials throughout the sensor operational-life cycle. Not only this provides essential data to enhance the materials' properties and optimize their performance, but also, it highlights new perspectives and provides suggestions to develop the next generation pressure sensors for clinical use.
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Affiliation(s)
- Ahmed Al-Qatatsheh
- Faculty of Science, Engineering, and Technology (FSET), Swinburne University of Technology, Melbourne VIC 3122, Australia; (Y.M.); (N.S.)
| | - Yosry Morsi
- Faculty of Science, Engineering, and Technology (FSET), Swinburne University of Technology, Melbourne VIC 3122, Australia; (Y.M.); (N.S.)
| | - Ali Zavabeti
- Department of Chemical Engineering, The University of Melbourne, Parkville VIC 3010, Australia;
| | - Ali Zolfagharian
- Faculty of Science, Engineering and Built Environment, School of Engineering, Deakin University, Waurn Ponds VIC 3216, Australia; (A.Z.); (A.Z.K.)
| | - Nisa Salim
- Faculty of Science, Engineering, and Technology (FSET), Swinburne University of Technology, Melbourne VIC 3122, Australia; (Y.M.); (N.S.)
| | - Abbas Z. Kouzani
- Faculty of Science, Engineering and Built Environment, School of Engineering, Deakin University, Waurn Ponds VIC 3216, Australia; (A.Z.); (A.Z.K.)
| | - Bobak Mosadegh
- Dalio Institute of Cardiovascular Imaging, Weill Cornell Medicine, New York, NY 10065, USA;
| | - Saleh Gharaie
- Faculty of Science, Engineering and Built Environment, School of Engineering, Deakin University, Waurn Ponds VIC 3216, Australia; (A.Z.); (A.Z.K.)
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12
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Picone DS, Schultz MG, Otahal P, Black JA, Bos WJ, Chen CH, Cheng HM, Cremer A, Dwyer N, Fonseca R, Hughes AD, Kim HL, Lacy PS, Laugesen E, Ohte N, Omboni S, Ott C, Pereira T, Pucci G, Roberts-Thomson P, Rossen NB, Schmieder RE, Sueta D, Takazawa K, Wang J, Weber T, Westerhof BE, Williams B, Yamada H, Yamamoto E, Sharman JE. Influence of Age on Upper Arm Cuff Blood Pressure Measurement. Hypertension 2020; 75:844-850. [PMID: 31983305 PMCID: PMC7035100 DOI: 10.1161/hypertensionaha.119.13973] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Blood pressure (BP) is a leading global risk factor. Increasing age is related to changes in cardiovascular physiology that could influence cuff BP measurement, but this has never been examined systematically and was the aim of this study. Cuff BP was compared with invasive aortic BP across decades of age (from 40 to 89 years) using individual-level data from 31 studies (1674 patients undergoing coronary angiography) and 22 different cuff BP devices (19 oscillometric, 1 automated auscultation, 2 mercury sphygmomanometry) from the Invasive Blood Pressure Consortium. Subjects were aged 64±11 years, and 32% female. Cuff systolic BP overestimated invasive aortic systolic BP in those aged 40 to 49 years, but with each older decade of age, there was a progressive shift toward increasing underestimation of aortic systolic BP (P<0.0001). Conversely, cuff diastolic BP overestimated invasive aortic diastolic BP, and this progressively increased with increasing age (P<0.0001). Thus, there was a progressive increase in cuff pulse pressure underestimation of invasive aortic PP with increasing decades of age (P<0.0001). These age-related trends were observed across all categories of BP control. We conclude that cuff BP as an estimate of aortic BP was substantially influenced by increasing age, thus potentially exposing older people to greater chance for misdiagnosis of the true risk related to BP.
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Affiliation(s)
- Dean S Picone
- From the Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (D.S.P., M.G.S., P.O., J.A.B., N.D., R.F., P.R.-T., J.E.S.)
| | - Martin G Schultz
- From the Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (D.S.P., M.G.S., P.O., J.A.B., N.D., R.F., P.R.-T., J.E.S.)
| | - Petr Otahal
- From the Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (D.S.P., M.G.S., P.O., J.A.B., N.D., R.F., P.R.-T., J.E.S.)
| | - J Andrew Black
- From the Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (D.S.P., M.G.S., P.O., J.A.B., N.D., R.F., P.R.-T., J.E.S.)
- Royal Hobart Hospital, Hobart, Tasmania (J.A.B., P.R-.T., N.D.)
| | - Willem J Bos
- St Antonius Hospital, Department of Internal Medicine, Nieuwegein, the Netherlands (W.J.B.)
- Department of Internal Medicine, Leiden University Medical Center, the Netherlands (W.J.B.)
| | - Chen-Huan Chen
- Department of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan (C.-H.C., H.-M.C.)
- Department of Medical Education, Taipei Veterans General Hospital, Taiwan (C.-H.C., H.-M.C.)
| | - Hao-Min Cheng
- Department of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan (C.-H.C., H.-M.C.)
- Department of Medical Education, Taipei Veterans General Hospital, Taiwan (C.-H.C., H.-M.C.)
| | - Antoine Cremer
- Department of Cardiology/Hypertension, University Hospital of Bordeaux, France (A.C.)
| | - Nathan Dwyer
- From the Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (D.S.P., M.G.S., P.O., J.A.B., N.D., R.F., P.R.-T., J.E.S.)
- Royal Hobart Hospital, Hobart, Tasmania (J.A.B., P.R-.T., N.D.)
| | - Ricardo Fonseca
- From the Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (D.S.P., M.G.S., P.O., J.A.B., N.D., R.F., P.R.-T., J.E.S.)
| | - Alun D Hughes
- Institute of Cardiovascular Sciences, University College London, United Kingdom (A.D.H.)
| | - Hack-Lyoung Kim
- Division of Cardiology, Seoul National University Boramae Hospital, South Korea (H.-L.K.)
| | - Peter S Lacy
- Institute of Cardiovascular Sciences University College London (UCL) and National Institute for Health Research (NIHR) UCL/UCL Hospitals Biomedical Research Centre, United Kingdom (P.S.L., B.W.)
| | - Esben Laugesen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Denmark (E.L.)
| | - Nobuyuki Ohte
- Department of Cardio-Renal Medicine and Hypertension, Nagoya City University Graduate School of Medical Sciences, Japan (N.O.)
| | - Stefano Omboni
- Clinical Research Unit, Italian Institute of Telemedicine, Varese (S.O.)
- Scientific Research Department of Cardiology, Science and Technology Park for Biomedicine, Sechenov First Moscow State Medical University, Russian Federation (S.O.)
| | - Christian Ott
- Department of Nephrology and Hypertension, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, Germany (C.O., R.E.S.)
| | - Telmo Pereira
- Polytechnic Institute of Coimbra, ESTES, Department of Physiology, General Humberto Delgado Street 102, Lousã, Portugal (T.P.)
| | - Giacomo Pucci
- Unit of Internal Medicine at Terni University Hospital, Department of Medicine, University of Perugia, Italy (G.P.)
| | - Philip Roberts-Thomson
- From the Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (D.S.P., M.G.S., P.O., J.A.B., N.D., R.F., P.R.-T., J.E.S.)
- Royal Hobart Hospital, Hobart, Tasmania (J.A.B., P.R-.T., N.D.)
| | | | - Roland E Schmieder
- Department of Nephrology and Hypertension, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, Germany (C.O., R.E.S.)
| | - Daisuke Sueta
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Japan (D.S., E.Y.)
| | - Kenji Takazawa
- Center for Health Surveillance and Preventive Medicine, Tokyo Medical University Hospital, Japan (K.T.)
| | - Jiguang Wang
- Centre for Epidemiological Studies and Clinical Trials, Shanghai Key Laboratory of Hypertension, The Shanghai Institute of Hypertension, Department of Hypertension, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, China (J.W.)
| | - Thomas Weber
- Cardiology Department, Klinikum Wels-Grieskirchen, Wels, Austria (T.W.)
| | - Berend E Westerhof
- Department of Pulmonary Diseases, VU University Medical Center, Amsterdam, the Netherlands (B.E.W.)
| | - Bryan Williams
- Institute of Cardiovascular Sciences University College London (UCL) and National Institute for Health Research (NIHR) UCL/UCL Hospitals Biomedical Research Centre, United Kingdom (P.S.L., B.W.)
| | - Hirotsugu Yamada
- Department of Community Medicine for Cardiology, Tokushima Graduate School of Biomedical Sciences, Japan (H.Y.)
| | - Eiichiro Yamamoto
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Japan (D.S., E.Y.)
| | - James E Sharman
- From the Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (D.S.P., M.G.S., P.O., J.A.B., N.D., R.F., P.R.-T., J.E.S.)
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Vigato ES, Lamas JLT. Blood pressure measurement by oscillometric and auscultatory methods in normotensive pregnant women. Rev Bras Enferm 2019; 72:162-169. [PMID: 31851249 DOI: 10.1590/0034-7167-2018-0314] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Accepted: 09/14/2018] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE to compare blood pressure values obtained by auscultatory and oscillometric methods in different gestational periods, considering cuff width. METHOD it is a cross-sectional and quasi-experimental study approved by the Research Ethics Committee. The sample consisted of 108 low-risk pregnant women. Blood pressure measurements were performed in gestational periods of 10-14, 19-22 and 27-30 weeks. RESULTS The oscillometric device presented values similar to the auscultatory method in systolic blood pressure, but overestimated diastolic blood pressure. Underestimation of blood pressure occurred when using the standard width cuff rather than the correct width cuff in both measuring methods. CONCLUSION Verification of brachial circumference and use of adequate cuffs in both methods are indispensable to obtain reliable blood pressure values in pregnant women. We recommend performance of additional studies to evaluate diastolic blood pressure overestimation by the Microlife 3BTO-A.
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A novel predictor of radial spasm: arterial stiffness. Blood Press Monit 2019; 23:253-259. [PMID: 29985200 DOI: 10.1097/mbp.0000000000000340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE In this study, we aimed to assess the relationship between radial artery spasm (RAS) and arterial stiffness (AS) measured by the oscillometric method. MATERIALS AND METHODS A total of 123 consecutive patients scheduled for elective coronary angiography in a single default radial center were enrolled for the study. AS [namely, augmentation pressure; augmentation index (AIx); and pulse wave velocity] was assessed using a validated oscillometric device (Mobil-O-Graph NG 24 h PWA). Central arterial pressures were also recorded. In the cath lab, the number of puncture attempts, total procedural time (TPT), and largest catheter size were noted. If greater than two catheters were required to complete imaging, it was additionally specified. RAS was considered to exist if two or more of predefined clinical features were present. RESULTS RAS was observed in 20 (16.3%) patients. Patients were divided into two distinct groups in terms of the occurence of RAS. In the RAS(+) group, the proportion of hypertensive individuals was significantly higher, whereas there were fewer smokers. With respect to operational data, TPT (24.3±9.8 vs. 29.3±9.1 mins; P=0.038) and procedures carried out with more than one puncture attempts were significantly higher in the RAS(+) group. Among all oscillometric parameters, augmentation pressure, AIx, and PR were found to be higher in the RAS(+) group. According to multivariate analysis, TPT (P=0.029) and AIx (odds ratio: 1.044, 95% confidence interval=0.977-1.117; P=0.009) were found to be independent predictors of RAS. CONCLUSION Along with conventional risk factors, AS assessment, as a practical, noninvasive method, may help to predict RAS in angiographic procedures.
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Mean Blood Pressure of the General Population with the Mean of Three Measurements Versus the Mean of the Second and Third Measurements. Ricarto Study. High Blood Press Cardiovasc Prev 2019; 26:391-397. [DOI: 10.1007/s40292-019-00338-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 08/20/2019] [Indexed: 02/07/2023] Open
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Muntner P, Shimbo D, Carey RM, Charleston JB, Gaillard T, Misra S, Myers MG, Ogedegbe G, Schwartz JE, Townsend RR, Urbina EM, Viera AJ, White WB, Wright JT. Measurement of Blood Pressure in Humans: A Scientific Statement From the American Heart Association. Hypertension 2019; 73:e35-e66. [PMID: 30827125 DOI: 10.1161/hyp.0000000000000087] [Citation(s) in RCA: 652] [Impact Index Per Article: 130.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The accurate measurement of blood pressure (BP) is essential for the diagnosis and management of hypertension. This article provides an updated American Heart Association scientific statement on BP measurement in humans. In the office setting, many oscillometric devices have been validated that allow accurate BP measurement while reducing human errors associated with the auscultatory approach. Fully automated oscillometric devices capable of taking multiple readings even without an observer being present may provide a more accurate measurement of BP than auscultation. Studies have shown substantial differences in BP when measured outside versus in the office setting. Ambulatory BP monitoring is considered the reference standard for out-of-office BP assessment, with home BP monitoring being an alternative when ambulatory BP monitoring is not available or tolerated. Compared with their counterparts with sustained normotension (ie, nonhypertensive BP levels in and outside the office setting), it is unclear whether adults with white-coat hypertension (ie, hypertensive BP levels in the office but not outside the office) have increased cardiovascular disease risk, whereas those with masked hypertension (ie, hypertensive BP levels outside the office but not in the office) are at substantially increased risk. In addition, high nighttime BP on ambulatory BP monitoring is associated with increased cardiovascular disease risk. Both oscillometric and auscultatory methods are considered acceptable for measuring BP in children and adolescents. Regardless of the method used to measure BP, initial and ongoing training of technicians and healthcare providers and the use of validated and calibrated devices are critical for obtaining accurate BP measurements.
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Ackland GL, Brudney CS, Cecconi M, Ince C, Irwin MG, Lacey J, Pinsky MR, Grocott MPW, Mythen MG, Edwards MR, Miller TE, Miller TE, Mythen MG, Grocott MPW, Edwards MR, Ackland GL, Brudney CS, Cecconi M, Ince C, Irwin MG, Lacey J, Pinsky MR, Sanders R, Hughes F, Bader A, Thompson A, Hoeft A, Williams D, Shaw AD, Sessler DI, Aronson S, Berry C, Gan TJ, Kellum J, Plumb J, Bloomstone J, McEvoy MD, Thacker JK, Gupta R, Koepke E, Feldheiser A, Levett D, Michard F, Hamilton M. Perioperative Quality Initiative consensus statement on the physiology of arterial blood pressure control in perioperative medicine. Br J Anaesth 2019; 122:542-551. [DOI: 10.1016/j.bja.2019.01.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 12/10/2018] [Accepted: 01/02/2019] [Indexed: 01/19/2023] Open
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Zhang Z, Xi W, Wang B, Chu G, Wang F. A convenient method to verify the accuracy of oscillometric blood pressure monitors by the auscultatory method: A smartphone-based app. J Clin Hypertens (Greenwich) 2018; 21:173-180. [PMID: 30570199 DOI: 10.1111/jch.13460] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Revised: 10/09/2018] [Accepted: 10/23/2018] [Indexed: 11/30/2022]
Abstract
It is recommended that oscillometric devices be calibrated by auscultation when first used, but this is difficult in practice. Here, we introduce a smartphone-based technique to verify the accuracy of blood pressure monitors (BPMs). We enrolled 99 consecutive subjects and tested 6 brands of BPMs in this study. During measurements of electronic oscillometric BPMs, Korotkoff sounds were simultaneously collected using a stethoscope head beneath a cuff connected to a smartphone, and an app named Accutension Stetho could then yield an auscultatory BP reading as a reference. Next, differences in BP between the different BPMs and Accutension Stetho were determined. The percentage of BP differences falling within 5, 10, and 15 mm Hg; the mean (MD) value; and the standard deviation (SD) of BP differences and deflation errors were analyzed among all the BPMs. We found that the percentages of SBP differences falling within 5 mm Hg of the 6 BPMs were 80%, 79%, 77%, 72%, 68%, and 63%, in turn. The deflation rates among the 6 BPMs were 2.23, 3.48, 6.10, 2.44, 3.66, and 4.85 mm Hg/beat, respectively. Deflation errors, which were defined as deflation prior to the end of the Korotkoff sounds, existed in 4 BPMs. In conclusion, Accutension Stetho could detect BP differences between oscillometric BPM readings and simultaneous auscultatory readings. Diastolic BP was overestimated when the device deflated prior to the end of the Korotkoff sounds. Using the app, it is possible to evaluate the accuracy of BPMs among the same subjects.
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Affiliation(s)
- Zhi Zhang
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Weichun Xi
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Bingjiang Wang
- Department of Cardiology, Huai'an First People's Hospital affiliated with Nanjing Medical University, Huai'an, China
| | - Guang Chu
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Fang Wang
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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Zakrzewski AM, Anthony BW. Noninvasive Blood Pressure Estimation Using Ultrasound and Simple Finite Element Models. IEEE Trans Biomed Eng 2018; 65:2011-2022. [PMID: 28613159 PMCID: PMC10615346 DOI: 10.1109/tbme.2017.2714666] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE Many commercially available arterial blood pressure measurement devices suffer from a range of weaknesses. For example, common weaknesses include being inaccurate, invasive, and ad hoc; many also require explicit user calibration or cut off blood flow to a limb. A novel algorithmic approach is presented to accurately estimate systolic and diastolic blood pressure in a way that does not require any explicit user calibration, is noninvasive, and does not cut off blood flow. METHODS The approach uses ultrasound images of the arterial wall and corresponding contact force data to obtain blood pressure estimates. To acquire data, an ultrasound probe was placed on the patient's carotid artery and the contact force was increased from 1.5 to 12 N. The artery was then algorithmically segmented from the recorded DICOM B-Mode data. The segmentation data and the contact force were used as input into the Levenberg-Marquardt optimization method to solve for the parameters, including blood pressure, of a simple finite element model of the carotid artery. RESULTS The algorithm was validated on 24 healthy volunteers. Algorithm arterial blood pressure predictions were compared to oscillometric blood pressure cuff readings. Regression and Bland-Altman analyses were performed on the data. CONCLUSION Both systolic pressure and diastolic pressure can be estimated using this novel noninvasive ultrasound-based method (systolic accuracy/precision: $-$ 2.36 mmHg/10.21 mmHg; diastolic accuracy/precision: $-$ 0.32/8.23 mmHg). SIGNIFICANCE The method occupies a clinical middle ground between the arterial catheter and cuff-based techniques. It has the potential to give accurate results for patients with hypertension and atherosclerosis.
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Factitious hypertensive crises unraveled by Doppler ultrasound: potential limitations of oscillometric blood pressure assessment. J Hypertens 2017; 35:2116-2118. [PMID: 28858202 DOI: 10.1097/hjh.0000000000001487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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