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Measuring blood pressure without any devices

Eric A Finkelstein, Benjamin A Haaland, Marcel Bilger, Aarti Sahasranaman, Robert A Sloan, Ei Ei Khaing Nang, Kelly R Evenson
BACKGROUND: Despite the increasing popularity of activity trackers, little evidence exists that they can improve health outcomes. We aimed to investigate whether use of activity trackers, alone or in combination with cash incentives or charitable donations, lead to increases in physical activity and improvements in health outcomes. METHODS: In this randomised controlled trial, employees from 13 organisations in Singapore were randomly assigned (1:1:1:1) with a computer generated assignment schedule to control (no tracker or incentives), Fitbit Zip activity tracker, tracker plus charity incentives, or tracker plus cash incentives...
October 3, 2016: Lancet Diabetes & Endocrinology
Laila Hubbert, Jacek Baranowski, Baz Delshad, Henrik Ahn
Following implantation of a continuous-flow left ventricular assist device (LVAD), left atrial pressure (LAP) monitoring allows for precise management of intravascular volume, inotropic therapy and pump speed. In this case series of 4 LVAD recipients we report the first clinical use of this wireless pressure sensor for long-term monitoring of LAP during LVAD support. A wireless microelectromechanical system (MEMS) pressure sensor, (Titan™, ISS Inc., Ypsilanti, MI, USA) was placed in the left atrium in four patients at the time of LVAD implantation...
September 22, 2016: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
C Chi, S Yu, B Bai, K Wang, L Wang, Y Lu, Y Zhang, Y Xu
OBJECTIVE: Central blood pressure (BP) is reported to associate with target organ damages (TODs) better than brachial BP. However, data regarding the association of TODs with central and brachial BP in the community-dwelling health elderly are scare. We therefore hypothesized that TODs are better associated with central than brachial blood pressure (BP) in the elderly community-based population, with considering all hypertensive TODs, namely left ventricular hypertrophy (LVH), left ventricular (LV) diastolic dysfunction (DD), carotid plaque, arteriosclerosis and microalbuminuria...
September 2016: Journal of Hypertension
Kazuomi Kario, Naoko Tomitani, Yuri Matsumoto, Haruna Hamasaki, Yukie Okawara, Maiko Kondo, Ryoko Nozue, Hiromi Yamagata, Ayako Okura, Satoshi Hoshide
Asians have specific characteristics of hypertension (HTN) and its relationship with cardiovascular disease. The morning surge in blood pressure (BP) in Asians is more extended, and the association slope between higher BP and the risk for cardiovascular events is steeper in this population than in whites. Thus, 24-hour BP control including at night and in the morning is especially important for Asian patients with HTN. There are 3 components of "perfect 24-hour BP control": the 24-hour BP level, adequate dipping of nocturnal BP (dipper type), and adequate BP variability such as the morning BP surge...
March 2016: Annals of Global Health
Whitney Laurel Quong, Adrian Ting-Hei Fung, Rollin Yinglin Yu, York Nien-Hsiung Hsiang
OBJECTIVE: The purpose of this study was to measure the toe-brachial index (TBI) in healthy young adults and to compare it with the accepted reference range. METHODS: Medical students from the undergraduate classes at the University of British Columbia were prospectively recruited. Participants were surveyed on physical parameters (height, weight), lifestyle factors (physical activity and type, smoking status, alcohol consumption), and medical history (current medications, medical conditions, family history)...
March 2016: Journal of Vascular Surgery
Teba Alnima, Emilie J B M Goedhart, Randy Seelen, Chris P M van der Grinten, Peter W de Leeuw, Abraham A Kroon
Carotid baroreflex activation therapy produces a sustained fall in blood pressure in patients with resistant hypertension. Because the activation electrodes are implanted at the level of the carotid sinus, it is conceivable that the nearby located carotid body chemoreceptors are stimulated as well. Physiological stimulation of the carotid chemoreceptors not only stimulates respiration but also increases sympathetic activity, which may counteract the effects of baroreflex activation. The aim of this exploratory study is to investigate whether there is concomitant carotid chemoreflex activation during baroreflex activation therapy...
June 2015: Hypertension
Robert J Freercks, Charles R Swanepool, Kristy L Turest-Swartz, Henri R O Carrara, Sulaiman El Moosa, Anthony S Lachman, Brian L Rayner
INTRODUCTION: Central aortic systolic pressure (CASP) strongly predicts cardiovascular outcomes. We undertook to measure ambulatory CASP in 74 prevalent dialysis patients using the BPro (HealthStats, Singapore) device. We also determined whether coronary or abdominal aortic calcification was associated with changes in CASP and whether interdialytic CASP predicted ambulatory measurement. METHODS: All patients underwent computed tomography for coronary calcium score, lateral abdominal radiography for aortic calcium score, echocardiography for left ventricular mass index and ambulatory blood pressure measurement using BPro calibrated to brachial blood pressure...
January 2014: Cardiovascular Journal of Africa
Kelly Mottet, Dennis Filips, Sarvesh Logsetty, Ian Atkinson
BACKGROUND: Uncontrolled hemorrhage is a significant cause of preventable death. The iTClamp 50 is a temporary wound closure device designed to control bleeding within seconds of an injury. This study evaluates the ability of the iTClamp to control compressible bleeding in a human cadaver model. METHODS: Sterile water was pumped through the major arteries to mimic blood flow. Full-thickness, elliptical segments of skin were excised; arteriotomies or complete transections were performed on the major arteries in the thigh (distal femoral), groin (common femoral), neck (carotid), and arm (brachial)...
March 2014: Journal of Trauma and Acute Care Surgery
James P Howard, Graham D Cole, Horst Sievert, Deepak L Bhatt, Vasilios Papademetriou, David E Kandzari, Justin E Davies, Darrel P Francis
In clinical practice we pay close attention to choosing an appropriate intervention for patients and performing it safely. We may put less thought into how to measure the effect without bias. Clinical practice involving noisy values such as blood pressure requires intelligent processing to avoid confusing patients, but applying such discretion in clinical trials may inadvertently disrupt quantification of the benefit of the intervention, in unblinded trials. In this article we explore two sources of bias, which label for convenience "big day bias" and "check once more bias", which can lead to unintentional exaggeration of benefits from both drugs and device-based treatment for hypertension...
March 1, 2014: International Journal of Cardiology
Ali Y Mejaddam, Oscar A Birkhan, Antonis C Sideris, Gwendolyn M Van der Wilden, Ayesha M Imam, John O Hwabejire, Yuchiao Chang, George C Velmahos, Peter J Fagenholz, Daniel D Yeh, Marc A de Moya, David Richard King
BACKGROUND: Heart rate complexity (HRC), commonly described as a "new vital sign," has shown promise in predicting injury severity, but its use in clinical practice has been precluded by the absence of real-time data. This study was conducted to evaluate the utility of real-time, automated, instantaneous, hand-held heart rate entropy analysis in predicting the need for lifesaving interventions (LSIs). We hypothesized that real-time HRC would predict LSIs. METHODS: Prospective enrollment of patients who met criteria for trauma team activation was conducted at a Level I trauma center (September 2011 to February 2012)...
October 2013: Journal of Trauma and Acute Care Surgery
Mohammad Reza Ghotbi, Narges Khanjani, Abolfazl Barkhordari, Somayeh Rahimi Moghadam, Abbas Mozaffari, Mohammad Hosein Gozashti
Noise is one of the most harmful agents in the workplace. In addition to the adverse effects of noise on the auditory system, as a stressor it may cause increased blood pressure, cardiovascular disease, anxiety, and impaired secretion of hormones. The purpose of this study was to evaluate changes in urinary catecholamines in workers exposed to industrial noise. This is an experimental study of the workers at the smelter section of Sarcheshmeh Copper Industries done on two separate days. During the first day, urine samples from 20 workers who did not use any hearing protection device, were collected during an 8-h work shift and on the second day the same was done but they were asked to use earplugs...
November 2013: Environmental Monitoring and Assessment
Theodore J Baird, Marc Bailie, Daniel J Patrick, David Moddrelle, Joshua Yoder, David V Gauvin, Jill A Dalton
INTRODUCTION: Understanding the appropriate application of telemetry and other technologies for nonclinical investigation of functional safety issues in the context of ongoing toxicology evaluations is a current industry challenge. One major issue is related to the potential impact of surgical implantation of a telemetry device on contemporarily established measures of drug toxicity, and potential for confounding pathological issues related to the systemic and local response of the experimental animal to the presence of a foreign body...
May 2013: Journal of Pharmacological and Toxicological Methods
Yasuhiro Shobayashi, Satoshi Tateshima, Ryuichi Kakizaki, Ryo Sudo, Kazuo Tanishita, Fernando Viñuela
OBJECT: Little is known about how much protection a flow diversion stent provides to a non-thrombosed aneurysm without the adjunctive use of coils. METHODS: A three-dimensional anatomically realistic computation aneurysm model was created from the digital subtraction angiogram of a large internal carotid artery-ophthalmic artery aneurysm which could have been treated with either a neck bridging stent or a flow diversion stent. Three-dimensional computational models of the Neuroform EZ neck bridging stent and Pipeline embolization device were created based on measurements with a stereo-microscope...
November 2013: Journal of Neurointerventional Surgery
Umit Yasar Tekelioglu, Ercan Lutfi Gurses, Simay Serin, Hulya Sungurtekin
The aim of the present study is to evaluate the analgesic activity, patient satisfaction, and side effect profile of different concentrations of levobupivacaine plus fentanyl administered through thoracic epidural patient-controlled analgesia in patients undergoing thoracotomy. The study included 60 patients who were randomly divided into three groups. At the end of the surgery, group I (n = 20) received 0.125% levobupivacaine plus 3 mg fentanyl, group II received 0.1% levobupivacaine plus 3 mg fentanyl, and group III received 0...
September 2012: Acta Anaesthesiologica Taiwanica: Official Journal of the Taiwan Society of Anesthesiologists
Gareth J Buckley, Andre Shih, Fernando L Garcia-Pereira, Carsten Bandt
OBJECTIVE: To investigate the hemodynamic effects following the use of an impedance threshold device (ITD) in a canine model of cardiopulmonary arrest. DESIGN: Experimental, randomized crossover study. SETTING: Cardiovascular research laboratory at a university veterinary center. ANIMALS: Eight purpose bred beagle dogs. INTERVENTIONS: Dogs were anesthetized and instrumented for the measurement of right atrial pressure , systolic blood pressure, mean blood pressure, and diastolic arterial blood pressure, end-tidal CO(2) , and carotid blood flow (CBF)...
August 2012: Journal of Veterinary Emergency and Critical Care
Konstantinos Katsanos, Dimitris Karnabatidis, Panagiotis Kitrou, Stavros Spiliopoulos, Nikolaos Christeas, Dimitris Siablis
PURPOSE: To report the 6-month results of a prospective randomized trial investigating angioplasty with paclitaxel-coated balloons (PCB) vs. plain balloon angioplasty (BA) for the treatment of failing native arteriovenous fistulae (AVF) or prosthetic arteriovenous grafts (AVG). METHODS: The enrollment criteria for this non-inferiority hypothesis trial included clinical signs of failing dialysis access with angiographic documentation of a significant venous stenotic lesion in patients with AVF or AVG circuits...
April 2012: Journal of Endovascular Therapy
Joji Ishikawa, Efthimia G Nasothimiou, Nikos Karpettas, Scott McDoniel, Seth D Feltheimer, George S Stergiou, Thomas G Pickering, Joseph E Schwartz
BACKGROUND: We evaluated the agreement between office blood pressure (OBP) measured by a mercury sphygmomanometer (Sphyg) and an automatic (Auto) device without any observers, and compared Auto and Sphyg OBP with ambulatory blood pressure (ABP) and home blood pressure (HBP). METHODS: OBP was measured in 75 hypertensive patients at two sites using an automatic monitor without a doctor or a nurse present and by Sphyg during three clinic visits. Between visits, monitoring of ABP and HBP was also performed...
June 2012: Blood Pressure Monitoring
M Ogawa, K Motoi, T Yamakoshi, M Nogawa, Y Yamakoshi, M Shibata, Y Yamakoshi
The concept of tailored bioinstrumentation using rapid prototyping and three-dimensional CAD (3D-CAD) was proposed. This concept is to make individually designed and fabricated sensor unit to attach human body. Within the proposed concept, cuff-units for continuous blood pressure measurement were individually designed using 3D-CAD and fabricated automatically. As the result, blood pressure wave forms can be obtained using the finally developed cuff units. Using rapid prototyping device, the design and fabrication process were accelerated without any artisan-like high skilled persons...
2011: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Tatsuo Igarashi, Yoshihiro Shimomura, Tadashi Yamaguchi, Hiroshi Kawahira, Harufumi Makino, Wen-Wei Yu, Yukio Naya
PURPOSE: Recent surgical techniques have been advancing under endoscopic view and insufflation of carbon dioxide gas to expand the abdominal cavity. Isotonic fluid could be one candidate for expanding cavities to facilitate surgical maneuvering. We tested the feasibility and drawbacks of replacement of irrigating materials using a porcine model (water-filled laparoendoscopic surgery [WAFLES]). MATERIALS AND METHODS: Laparoscopic cholecystectomy was performed in two porcine models using instillation of sorbitol solution as irrigant...
January 2012: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
Tsukasa Namekata, Kenji Suzuki, Norio Ishizuka, Kohji Shirai
BACKGROUND: A cardio-ankle vascular index (CAVI) has been developed to represent the extent of arteriosclerosis throughout the aorta, femoral artery and tibial artery independent of blood pressure. To practically use CAVI as a diagnostic tool for determining the extent of arteriosclerosis, our study objectives were (1) to establish the baseline CAVI scores by age and gender among cardiovascular disease (CVD) risk-free persons, (2) to compare CAVI scores between genders to test the hypothesis that the extent of arteriosclerosis in men is greater than in women, and (3) to compare CAVI scores between the CVD risk-free group and the CVD high-risk group in order to test the hypothesis that the extent of arteriosclerosis in the CVD high-risk group is greater than in the CVD risk-free group...
2011: BMC Cardiovascular Disorders
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