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Bioimpedance

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https://www.readbyqxmd.com/read/28227693/using-bioimpedance-spectroscopy-parameters-as-real-time-feedback-during-tdcs
#1
Isar Nejadgholi, Herschel Caytak, Miodrag Bolic, Isar Nejadgholi, Herschel Caytak, Miodrag Bolic, Isar Nejadgholi, Miodrag Bolic, Herschel Caytak
An exploratory analysis is carried out to investigate the feasibility of using BioImpedance Spectroscopy (BIS) parameters, measured on scalp, as real-time feedback during Transcranial Direct Current Stimulation (tDCS). TDCS is shown to be a potential treatment for neurological disorders. However, this technique is not considered as a reliable clinical treatment, due to the lack of a measurable indicator of treatment efficacy. Although the voltage that is applied on the head is very simple to measure during a tDCS session, changes of voltage are difficult to interpret in terms of variables that affect clinical outcome...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227575/non-invasive-multi-modal-sensing-of-skin-stretch-and-bioimpedance-for-detecting-infiltration-during-intravenous-therapy
#2
Jambu A Jambulingam, Russell McCrory, Leanne West, Omer T Inan, Jambu A Jambulingam, Russell McCrory, Leanne West, Omer T Inan, Leanne West, Omer T Inan, Russell McCrory
Intravenous infiltration is a condition wherein an infused solution leaks inadvertently into soft tissue surrounding a hypodermic needle site. This occurrence affects approximately 6.5% of patients in hospitals worldwide, and can lead to severe tissue damage if not treated immediately. The methods currently used by medical staff to detect an infiltration are subjective and can potentially be prone to error. Infiltration is an even larger concern in pediatric patients, who have smaller veins than adults and have more difficulty in communicating pain or other discomfort associated with the infiltration with medical staff...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227494/localised-impedance-monitoring-device-for-the-remote-clinical-assessment-of-home-based-dialysis-patients
#3
A Montalibet, W Arkouche, P Bogonez Franco, S Bonnet, A Clarion, G Delhomme, C Gehin, S Gharbi, R Guillemaud, P Jallon, B Massot, P Pham, E Ribbe-Cornet, E McAdams, A Montalibet, W Arkouche, P Bogonez Franco, S Bonnet, A Clarion, G Delhomme, C Gehin, S Gharbi, R Guillemaud, P Jallon, B Massot, P Pham, E Ribbe-Cornet, E McAdams, B Massot, P Pham, A Montalibet, P Jallon, E Ribbe-Cornet, P Bogonez Franco, G Delhomme, S Bonnet, R Guillemaud, W Arkouche, A Clarion, C Gehin, S Gharbi, E McAdams
BioImpedance Spectroscopy (BIS) has been clinically used to determine the hydrational status of patients undergoing haemodialysis (HD). In the present project we are developing a calf-localised, integrated impedimetric device to periodically and conveniently measure and transmit information on the hydrational status of home-based patients to a remote clinic. Surprisingly, we have found that simple postural changes before or during measurement lead to significant fluid shifts in the lower leg that are as important and as long lasting as the effects of haemodialysis...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226982/measurement-of-electrical-impedance-in-different-ex-vivo-tissues
#4
Davide Meroni, Dario Bovio, Pietro A Frisoli, Andrea Aliverti, Davide Meroni, Dario Bovio, Pietro A Frisoli, Andrea Aliverti, Dario Bovio, Andrea Aliverti, Davide Meroni, Pietro A Frisoli
Bioimpedance allows living tissues characterization and detection of pathological states. Although in previous years several methods have been proposed to assess bioimpedance, many instruments used in studies of living tissues characterization are commercial devices designed for the measurement of components or electronic circuits and therefore the measurement of biological tissues can be affected by electrical polarization. In order to test if electrical impedance spectroscopy may be helpful in providing further information about the structure and the properties of tissues, an impedance meter for living-tissues, able to avoid polarization, was developed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226889/dual-mode-cmos-analog-front-end-afe-for-electrical-impedance-spectroscopy-eis-systems
#5
Virgilio Valente, Dai Jiang, Andreas Demosthenous, Virgilio Valente, Dai Jiang, Andreas Demosthenous, Dai Jiang, Andreas Demosthenous, Virgilio Valente
This paper presents the operation of a dual-mode wideband CMOS analog front-end (AFE) for electrical impedance spectroscopy. The chip combines two current-readout (CR) channels and four voltage-readout (VR) channels suitable for both bipolar and tetrapolar EIS analysis. The chip addresses the need for flexible readout units for real-time simultaneous single-cell and large scale tissue/organ analysis. Postlayout simulations show that the VR channel is capable of wideband operation up to 12 MHz with noise floor as low as 16...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28224647/electrical-impedance-myography-eim-in-individuals-with-col6-and-lama2-congenital-muscular-dystrophy-a-cross-sectional-and-two-year-analysis
#6
Carmel Nichols, Minal S Jain, Katherine G Meilleur, Tianxia Wu, James Collins, Melissa R Waite, Jahannaz Dastgir, Anam Salman, Sandra Donkervoort, Tina Duong, Katherine Keller, Meganne E Leach, Donovan J Lott, Michelle N McGuire, Leslie Nelson, Anne Rutkowski, Carole Vuillerot, Carsten G Bönnemann, Tanya J Lehky
INTRODUCTION: Electrical impedance myography (EIM) is a non-invasive electrophysiological technique that characterizes muscle properties through bioimpedance. We compared EIM measurements to function, strength, and disease severity in a population with congenital muscular dystrophy (CMD). METHODS: Forty-one patients with CMD, either collagen 6 related disorders (COL6-RD) (n = 21) or laminin alpha 2-related disorders (LAMA2-RD) (n = 20) and 21 healthy pediatric controls underwent 2 yearly EIM exams...
February 22, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28215030/remote-monitoring-to-reduce-heart-failure-readmissions
#7
REVIEW
Sitaramesh Emani
PURPOSE OF REVIEW: Rehospitalization for heart failure remains a challenge in the treatment of affected patients. The ability to remotely monitor patients for worsening heart failure may provide an avenue through which therapeutic interventions can be made to prevent a rehospitalization. Available data on remote monitoring to reduce heart failure rehospitalizations are reviewed within. RECENT FINDINGS: Strategies to reduce readmissions include clinical telemonitoring, bioimpedance changes, biomarkers, and remote hemodynamic monitoring...
February 18, 2017: Current Heart Failure Reports
https://www.readbyqxmd.com/read/28209604/birth-size-risk-factors-across-life-and-cognition-in-late-life-protocol-of-prospective-longitudinal-follow-up-of-the-mynah-mysore-studies-of-natal-effects-on-ageing-and-health-cohort
#8
Murali Krishna, G Mohan Kumar, S R Veena, G V Krishnaveni, Kalyanaraman Kumaran, Samuel Christaprasad Karat, Patsy Coakley, Clive Osmond, John R M Copeland, Giriraj Chandak, Dattatray Bhat, Mathew Varghese, Martin Prince, Caroline Fall
INTRODUCTION: For late-life neurocognitive disorders, as for other late-life chronic diseases, much recent interest has focused on the possible relevance of Developmental Origins of Health and Disease (DOHaD). Programming by undernutrition in utero, followed by overnutrition in adult life may lead to an increased risk, possibly mediated through cardiovascular and metabolic pathways. This study will specifically examine, if lower birth weight is associated with poorer cognitive functioning in late life in a south Indian population...
February 16, 2017: BMJ Open
https://www.readbyqxmd.com/read/28209335/impact-of-fluid-status-and-inflammation-and-their-interaction-on-survival-a-study-in-an-international-hemodialysis-patient-cohort
#9
Marijke J E Dekker, Daniele Marcelli, Bernard J Canaud, Paola Carioni, Yuedong Wang, Aileen Grassmann, Constantijn J A M Konings, Peter Kotanko, Karel M Leunissen, Nathan W Levin, Frank M van der Sande, Xiaoling Ye, Vaibhav Maheshwari, Len A Usvyat, Jeroen P Kooman
In hemodialysis patients extracellular fluid overload is a predictor of all-cause and cardiovascular mortality, and a relation with inflammation has been reported in previous studies. The magnitude and nature of this interaction and the effects of moderate fluid overload and extracellular fluid depletion on survival are still unclear. We present the results of an international cohort study in 8883 hemodialysis patients from the European MONDO initiative database where, during a three-month baseline period, fluid status was assessed using bioimpedance and inflammation by C-reactive protein...
February 13, 2017: Kidney International
https://www.readbyqxmd.com/read/28202349/muscle-ultrasound-and-sarcopenia-in-older-individuals-a-clinical-perspective
#10
REVIEW
Andrea Ticinesi, Tiziana Meschi, Marco V Narici, Fulvio Lauretani, Marcello Maggio
INTRODUCTION: A precise quantitative measurement of skeletal muscle mass is fundamental for diagnosing sarcopenia in older individuals. The current techniques of assessment, including dual-energy x-ray absorptiometry (DXA), bioimpedance analysis (BIA), and magnetic resonance imaging (MRI) are either difficult to perform in everyday clinical practice or biased by concurrent clinical confounders. B-mode muscle ultrasound can be helpful in assessing muscle mass and architecture, and thus possibly useful for diagnosing or screening sarcopenia...
February 12, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28198913/body-composition-in-patients-with-crohn-s-disease-and-ulcerative-colitis
#11
Ivi Ribeiro Back, Sonia Silva Marcon, Natalia Moreno Gaino, Daniela Salate Biagioni Vulcano, Mariana de Souza Dorna, Ligia Yukie Sassaki
BACKGROUND: The nutritional status of individuals with inflammatory bowel diseases is directly related to the severity of the disease and is associated with poor prognosis and the deterioration of immune competence. OBJECTIVE: To assess the nutritional status and the body composition of outpatients with inflammatory bowel diseases. METHODS: A cross-sectional study was conducted with clinical and nutritional assessment of patients with Crohn's disease and ulcerative colitis...
February 13, 2017: Arquivos de Gastroenterologia
https://www.readbyqxmd.com/read/28195941/noninvasive-bioelectrical-impedance-for-predicting-clinical-outcomes-in-outpatients-with-heart-failure
#12
Kristin J Lyons, Michelle K Bischoff, Gregg C Fonarow, Tamara B Horwich
BACKGROUND: Noninvasive bioelectrical impedance analysis (BIA) has shown promise in acute heart failure (HF) management. To our knowledge, its use in predicting outcomes in outpatients with chronic HF patients has not been well described. METHODS AND RESULTS: BIA assessment of edema index was performed in 359 outpatients with HF using the InBody 520 scale. Edema index was calculated by dividing extracellular by total body water. Patients were stratified into those with low (≤0...
March 2017: Critical Pathways in Cardiology
https://www.readbyqxmd.com/read/28193312/leukocyte-and-skeletal-muscle-telomere-length-and-body-composition-in-monozygotic-twin-pairs-discordant-for-long-term-hormone-replacement-therapy
#13
Elina Sillanpää, Paula Niskala, Eija K Laakkonen, Elodie Ponsot, Markku Alén, Jaakko Kaprio, Fawzi Kadi, Vuokko Kovanen, Sarianna Sipilä
Estrogen-based hormone replacement therapy (HRT) may be associated with deceleration of cellular aging. We investigated whether long-term HRT has effects on leukocyte (LTL) or mean and minimum skeletal muscle telomere length (SMTL) in a design that controls for genotype and childhood environment. Associations between telomeres, body composition, and physical performance were also examined. Eleven monozygotic twin pairs (age 57.6 ± 1.8 years) discordant for HRT were studied. Mean duration of HRT use was 7.3 ± 3...
February 14, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28191763/electrical-cell-substrate-impedance-spectroscopy-can-monitor-age-grouped-human-adipose-stem-cell-variability-during-osteogenic-differentiation
#14
Rachel C Nordberg, Jianlei Zhang, Emily H Griffith, Matthew W Frank, Binil Starly, Elizabeth G Loboa
Human adipose stem cells (hASCs) are an attractive cell source for bone tissue engineering applications. However, a critical issue to be addressed before widespread hASC clinical translation is the dramatic variability in proliferative capacity and osteogenic potential among hASCs isolated from different donors. The goal of this study was to test our hypothesis that electrical cell-substrate impedance spectroscopy (ECIS) could track complex bioimpedance patterns of hASCs throughout proliferation and osteogenic differentiation to better understand and predict variability among hASC populations...
February 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28187933/clinical-usefulness-of-abdominal-bioimpedance-viscan-in-the-determination-of-visceral-fat-and-its-application-in-the-diagnosis-and-management-of-obesity-and-its-comorbidities
#15
Javier Gómez-Ambrosi, Ignacio González-Crespo, Victoria Catalán, Amaia Rodríguez, Rafael Moncada, Víctor Valentí, Sonia Romero, Beatriz Ramírez, Camilo Silva, María J Gil, Javier Salvador, Alberto Benito, Inmaculada Colina, Gema Frühbeck
BACKGROUND & AIMS: Visceral adipose tissue (VAT) has been shown to be profoundly responsible of most of the obesity-associated metabolic derangements. The measurement of VAT usually implies the use of imaging techniques such as magnetic resonance imaging or computed tomography (CT). Our aim was to evaluate the accuracy of the determination of VAT by means of abdominal bioimpedance (BIA) with the ViScan device in comparison with CT and its clinical usefulness in the management of obesity...
January 28, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28181055/endotracheal-bioimpedance-cardiography-improves-immediate-postoperative-outcome-a-case-control-study-in-off-pump-coronary-surgery
#16
Thomas Leclercq, Marc Lilot, Thomas Schulz, Alexandre Meyer, Fadi Farhat, Jean-Luc Fellahi
The feasibility and clinical utility of the endotracheal cardiac output monitor (ECOM) to optimize intraoperative hemodynamics and improve short-term outcome in off-pump coronary artery bypass grafting (OPCAB) is unknown. We aimed to compare ECOM with a standard of care in that specific surgical setting. Twenty consecutive adult ECOM-monitored patients undergoing OPCAB were prospectively included (ECOM group) and retrospectively compared to 42 patients scheduled for similar surgery without ECOM monitoring (Control group)...
February 8, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28174440/analysis-of-affected-and-non-affected-sides-of-stroke-hemiparalysis-patients-and-correlations-between-rehabilitation-therapy-assessments-using-the-bioelectrical-impedance-analysis-method
#17
ChanUk Yoo, SeongKyo Suh, YoungGyu Kim
[Purpose] The purpose of this study was to demonstrate the use of bioelectrical impedance analysis as an appropriate rehabilitation therapy evaluation tool for stroke hemiplegic patients. [Subjects and Methods] A group of 20 stroke patients diagnosed with stroke hemiplegia who underwent stroke rehabilitation from October to November 2015 participated in this study. Using bioelectrical impedance analysis, stroke hemiparalysis patients were examined, and the affected and non-affected sides were compared. This correlation between impedance measurement values and rehabilitation therapy as an assessment tool was determined...
December 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28165555/nutritional-status-and-intrarenal-arterial-stiffness-in-cardiorenal-syndrome-a-pilot-study
#18
A Gigante, F Di Mario, B Barbano, E Rosato, G Di Lazzaro Giraldi, R Pofi, M L Gasperini, D Amoroso, R Cianci, A Laviano
OBJECTIVE: Cardio-Renal Syndrome (CRS) is a condition, which is more frequently observed in clinical practice. The aim of this study is to explore nutritional status and intrarenal arterial stiffness in patients affected by CRS. PATIENTS AND METHODS: 14 consecutive CRS patients, screened for anthropometry, biochemistry, nutritional and metabolic status underwent renal Doppler ultrasound and whole-body bioimpedance spectroscopy (BIS). RESULTS: We found a positive correlation between phase angle (PA) and CKD-EPI and MDRD (p=0...
January 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28154199/skin-sodium-concentration-correlates-with-left-ventricular-hypertrophy-in-ckd
#19
Markus P Schneider, Ulrike Raff, Christoph Kopp, Johannes B Scheppach, Sebastian Toncar, Christoph Wanner, Georg Schlieper, Turgay Saritas, Jürgen Floege, Matthias Schmid, Anna Birukov, Anke Dahlmann, Peter Linz, Rolf Janka, Michael Uder, Roland E Schmieder, Jens M Titze, Kai-Uwe Eckardt
The pathogenesis of left ventricular hypertrophy in patients with CKD is incompletely understood. Sodium intake, which is usually assessed by measuring urinary sodium excretion, has been inconsistently linked with left ventricular hypertrophy. However, tissues such as skin and muscle may store sodium. Using (23)sodium-magnetic resonance imaging, a technique recently developed for the assessment of tissue sodium content in humans, we determined skin sodium content at the level of the calf in 99 patients with mild to moderate CKD (42 women; median [range] age, 65 [23-78] years)...
February 2, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28145415/changes-in-serum-osmotic-pressure-following-haemodialysis-treatments-lead-to-changes-in-bioimpedance-spectroscopy-estimates-of-lean-and-adipose-tissue
#20
M Antonelou, S El-Kateb, N Davies, A Davenport
Haemodialysis (HD) patients are at risk of sarcopenia. Newer bioimpedance devices (BIS) using a three-compartmental body composition model, separate extracellular water overhydration from normo-hydrated lean tissue mass (LTM) and adipose tissue mass (ATM). During HD hydration status changes, along with changes in electrolytes and solutes, and may alter body composition measurements. As such, we measured BIS and serum osmotic pressure (sOP) pre- and post dialysis in 43 patients. There were no significant changes in LTM (39...
February 1, 2017: European Journal of Clinical Nutrition
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