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Bioimpedance

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https://www.readbyqxmd.com/read/29891183/the-prevalence-of-sarcopenia-in-chinese-elderly-nursing-home-residents-a-comparison-of-4-diagnostic-criteria
#1
Yanli Zeng, Xiaoyi Hu, Lingling Xie, Zengli Han, Yun Zuo, Ming Yang
OBJECTIVES: To investigate the prevalence and associated factors of sarcopenia defined by different criteria in nursing home residents. DESIGN: A cross-sectional study. SETTING: Four nursing homes in Chengdu, China. PARTICIPANTS: Elderly adults aged 65 years or older. MEASUREMENTS: We applied 4 diagnostic criteria [European Working Group on Sarcopenia in Older People (EWGSOP), Asia Working Group for Sarcopenia (AWGS), International Working Group on Sarcopenia (IWGS), and Foundation for the National Institutes of Health (FNIH)] to define sarcopenia...
June 8, 2018: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/29879146/bioelectrical-impedance-vector-analysis-biva-in-sport-and-exercise-systematic-review-and-future-perspectives
#2
Jorge Castizo-Olier, Alfredo Irurtia, Monèm Jemni, Marta Carrasco-Marginet, Raúl Fernández-García, Ferran A Rodríguez
BACKGROUND: Bioelectrical impedance vector analysis (BIVA) is a general concept that includes all methodologies used in the analysis of the bioelectrical vector, whereas the "classic" BIVA is a patented methodology included among these methods of analysis. Once this was clarified, the systematic review of the literature provides a deeper insight into the scope and range of application of BIVA in sport and exercise. OBJECTIVE: The main goal of this work was to systematically review the sources on the applications of BIVA in sport and exercise and to examine its usefulness and suitability as a technique for the evaluation of body composition, hydration status, and other physiological and clinical relevant characteristics, ultimately to trace future perspectives in this growing area, including a proposal for a research agenda...
2018: PloS One
https://www.readbyqxmd.com/read/29877824/a-multichannel-real-time-bioimpedance-measurement-device-for-pulse-wave-analysis
#3
Roman Kusche, Paula Klimach, Martin Ryschka
Pulse wave analysis is an important method used to gather information about the cardiovascular system. Instead of detecting the pulse wave via pressure sensors, bioimpedance measurements can be performed to acquire minuscule changes in the conductivity of the tissue, caused by the pulse wave. This work presents a microcontroller-based bioimpedance measurement system, which has the capability to acquire impedance measurements from up to four independent channels simultaneously. By combining a problem-specific analog measurement circuit with a 24 bits analog-to-digital converter, the system is capable of acquiring 1000 impedances per second with a signal-to-noise ratio in a range from 92 to 96 dB...
June 2018: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/29877822/mixed-signal-ic-with-pulse-width-modulation-wireless-telemetry-for-implantable-cardiac-pacemakers-in-0-18-%C3%AE-m-cmos
#4
Yasser Rezaeiyan, Milad Zamani, Omid Shoaei, Wouter A Serdijn
A low-power mixed-signal IC for implantable pacemakers is presented. The proposed system features three independent intracardiac signal readout channels with pulse-width-modulated outputs. Also, the proposed system is capable of measuring the amplitude and phase of the bioimpedance with pulse-width-modulated outputs for use in rate adaptive pacemakers. Moreover, a stimulation system is embedded, offering 16 different amplitudes from 1 to 7.8 V. A backscattering transmitter transfers the output signals outside the body with very little power consumption...
June 2018: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/29869117/validating-the-use-of-bioimpedance-spectroscopy-for-assessment-of-fluid-status-in-children
#5
Indranil Dasgupta, David Keane, Elizabeth Lindley, Ihab Shaheen, Kay Tyerman, Franz Schaefer, Elke Wühl, Manfred J Müller, Anja Bosy-Westphal, Hans Fors, Jovanna Dahlgren, Paul Chamney, Peter Wabel, Ulrich Moissl
BACKGROUND: Bioimpedance spectroscopy (BIS) with a whole-body model to distinguish excess fluid from major body tissue hydration can provide objective assessment of fluid status. BIS is integrated into the Body Composition Monitor (BCM) and is validated in adults, but not children. This study aimed to (1) assess agreement between BCM-measured total body water (TBW) and a gold standard technique in healthy children, (2) compare TBW_BCM with TBW from Urea Kinetic Modelling (UKM) in haemodialysis children and (3) investigate systematic deviation from zero in measured excess fluid in healthy children across paediatric age range...
June 4, 2018: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/29867616/metabolic-barriers-to-weight-gain-in-patients-with-anorexia-nervosa-a-young-adult-case-report
#6
Verena Haas, Andreas Stengel, Anja Mähler, Gabriele Gerlach, Celine Lehmann, Michael Boschmann, Martina de Zwaan, Stephan Herpertz
Background: Over-proportionally high energy requirements in some patients with anorexia nervosa (AN) have been reported, but their exact origin remains unclear. Objective: To objectively measure metabolic alterations in an AN patient with high energy requirements as judged by clinical observation. Materials and Methods: We present the case of a young woman with AN (index patient, IP; 19 years, admission BMI 13.9 kg/m2 ). After 3 months of treatment at BMI 17.4 kg/m2 , we assessed her resting energy expenditure (REE), respiratory exchange ratio (RER), diet-induced thermogenesis (DIT), seated non-exercise physical activity (NEPA in Volt by infrared sensors), and exercise activity thermogenesis (EAT) in a metabolic chamber; body composition (bioimpedance analysis), energy intake (15d-food protocol), physical activity (accelerometry) and endocrine parameters...
2018: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/29866967/calibration-and-electrical-validation-of-a-bis-portable-system
#7
José Alves, Filipe Sousa, Miguel V Correia
Heart failure (HF) affects at least 26 million people worldwide and is considered a global pandemic. Almost 1 out of 4 hospitalised patients are re-hospitalised for HF within the 30-day post-discharge period. This can be avoided if changes to the hemodynamics of the HF patient's body are early detected. Bioimpedance Spectroscopy (BIS) is a method that allows the measurement and analysis of multi-frequency body complex impedance and can be used to detect changes to the HF patient's hemodynamics. This paper presents the calibration and validation process of a low-cost portable BIS system, as well as, the study of the best Cole parameter estimation methods...
2018: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/29861438/analysis-of-consistency-of-transthoracic-bioimpedance-measurements-acquired-with-dry-carbon-black-pdms-electrodes-adhesive-electrodes-and-wet-textile-electrodes
#8
Hugo F Posada-Quintero, Natasa Reljin, Caitlin Eaton-Robb, Yeonsik Noh, Jarno Riistama, Ki H Chon
The detection of intrathoracic volume retention could be crucial to the early detection of decompensated heart failure (HF). Transthoracic Bioimpedance (TBI) measurement is an indirect, promising approach to assessing intrathoracic fluid volume. Gel-based adhesive electrodes can produce skin irritation, as the patient needs to place them daily in the same spots. Textile electrodes can reduce skin irritation; however, they inconveniently require wetting before each use and provide poor adherence to the skin...
May 26, 2018: Sensors
https://www.readbyqxmd.com/read/29806514/volume-status-and-arterial-blood-pressures-are-associated-with-arterial-stiffness-in-hemodialysis-patients
#9
Alper Erdan, Abdullah Ozkok, Nadir Alpay, Vakur Akkaya, Alaattin Yildiz
BACKGROUND: Arterial stiffness is a strong predictor of mortality in hemodialysis patients. In this study, we aimed to investigate possible relations of arterial stiffness with volume status determined by bioimpedance analysis and aortic blood pressure parameters. Also, effects of a single hemodialysis session on these parameters were studied. METHODS: A total of 75 hemodialysis patients (M/F: 43/32; mean age: 53 ± 17) were enrolled. Carotid-femoral pulse wave velocity, augmentation index, and aortic pulse pressure were measured by applanation tonometry before and after hemodialysis...
May 1, 2018: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/29792174/perspectives-on-clinical-use-of-bioimpedance-in-hemodialysis-focus-group-interviews-with-renal-care-professionals
#10
Jenny Stenberg, Catrin Henriksson, Magnus Lindberg, Hans Furuland
BACKGROUND: Inadequate volume control may be a main contributor to poor survival and high mortality in hemodialysis patients. Bioimpedance measurement has the potential to improve fluid management, but several dialysis centers lack an agreed fluid management policy, and the method has not yet been implemented. Our aim was to identify renal care professionals' perceived barriers and facilitators for use of bioimpedance in clinical practice. METHODS: Qualitative data were collected through four focus group interviews with 24 renal care professionals: dieticians, nephrologists and nurses, recruited voluntarily from a nation-wide selection of hemodialysis centers, having access to a bioimpedance-device...
May 23, 2018: BMC Nephrology
https://www.readbyqxmd.com/read/29790389/unmasking-a-sustained-negative-effect-of-sglt2-inhibition-on-body-fluid-volume-in-the-rat
#11
Takahiro Masuda, Yuko Watanabe, Keiko Fukuda, Minami Watanabe, Akira Onishi, Ken Ohara, Toshimi Imai, Hermann Koepsell, Shigeaki Muto, Volker Vallon, Daisuke Nagata
The chronic intrinsic diuretic and natriuretic tone of sodium-glucose cotransporter 2 (SGLT2) inhibitors is incompletely understood, because their effect on body fluid volume (BFV) has not been fully evaluated and because they often increase food and fluid intake at the same time. Here we first compared the effect of the SGLT2 inhibitor ipragliflozin (Ipra, 0.01% in diet for 8 weeks) and vehicle (Veh) in Spontaneously Diabetic Torii rat, a non-obese type 2 diabetic model, and non-diabetic Sprague-Dawley rats...
May 23, 2018: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29789877/-meta-analyses-on-measurement-precision-of-non-invasive-hemodynamic-monitoring-technologies-in-adults
#12
G Pestel, K Fukui, M Higashi, I Schmidtmann, C Werner
An ideal non-invasive monitoring system should provide accurate and reproducible measurements of clinically relevant variables that enables clinicians to guide therapy accordingly. The monitor should be rapid, easy to use, readily available at the bedside, operator-independent, cost-effective and should have a minimal risk and side effect profile for patients. An example is the introduction of pulse oximetry, which has become established for non-invasive monitoring of oxygenation worldwide. A corresponding non-invasive monitoring of hemodynamics and perfusion could optimize the anesthesiological treatment to the needs in individual cases...
May 22, 2018: Der Anaesthesist
https://www.readbyqxmd.com/read/29783628/is-3-carboxy-4-methyl-5-propyl-2-furanpropionate-cmpf-a-clinically-relevant-uremic-toxin-in-haemodialysis-patients
#13
Mathilde Luce, Anais Bouchara, Myriam Pastural, Samuel Granjon, Jean Christophe Szelag, Maurice Laville, Walid Arkouche, Denis Fouque, Christophe O Soulage, Laetitia Koppe
3-Carboxy-4-methyl-5-propyl-2-furanpropionate (CMPF) is a metabolite of furan fatty acid and a marker of fish oil intake. CMPF is described as a protein-bound uremic toxin and interacts with free oxygen radicals, which can induce cell damages. However, the clinical consequences of CMPF accumulation in haemodialysis patients remain poorly documented. The aims of this study are to investigate potential association between CMPF levels and (i) biochemical and nutritional parameters; (ii) cardiovascular events and (iii) mortality...
May 18, 2018: Toxins
https://www.readbyqxmd.com/read/29769749/reference-values-for-body-composition-and-associations-with-blood-pressure-in-kenyan-adults-aged-%C3%A2-50-years-old
#14
Madeleine C Bastawrous, Carmen Piernas, Andrew Bastawrous, Jason Oke, Daniel Lasserson, Wanjiku Mathenge, Matthew J Burton, Susan A Jebb, Hannah Kuper
BACKGROUND/OBJECTIVES: To develop age- and sex-specific centile reference curves for fat-free mass (FFM) and fat mass (FM) adjusted for height in an adult Kenyan population and to investigate the association between FM, FFM and blood pressure (BP). SUBJECTS/METHODS: Measures of body composition from bioimpedance analyses and BP were collected in 1995 participants aged ≥50 years in Nakuru County, Kenya. Reference curves were produced using the LMS method. Multivariable linear regression models were used to test the cross-sectional association between body composition indexes and BP...
May 15, 2018: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29756974/-effects-of-lacto-vegetarian-diet-and-stabilization-core-exercises-on-body-composition-and-pain-in-women-with-fibromyalgia-randomized-controlled-trial
#15
Alejandro Martínez-Rodríguez, Belén Leyva-Vela, Alba Martínez-García, Yolanda Nadal-Nicolás
BACKGROUND: fibromyalgia is a disease of unknown origin characterized by chronic muscular pain. The lack of knowledge about this disease is one of the main causes that makes complex to make a diagnosis and an appropriate treatment. OBJECTIVE: the main objective of this study was to know the efficacy of a physiotherapy treatment combined with a lacto-vegetarian dietary-nutritional intervention, on low back pain and body composition in women with fibromyalgia. METHODS: twenty-one women were randomly divided into three groups: A (core stabilization exercises + lacto-vegetarian diet), B (placebo + lacto-vegetarian diet) and C (control)...
March 1, 2018: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/29756970/critical-overview-of-current-anthropometric-methods-in-comparison-with-a-new-index-to-make-early-detection-of-overweight-in-spanish-university-students-the-normalized-weight-adjusted-index
#16
Guillermo Doménech-Asensi, Carlos Gómez-Gallego, Gaspar Ros-Berruezo, Francisco Javier García-Alonso, Manuel Canteras-Jordana
BACKGROUND: overweight and obesity have been increasing, and university students are an important target for prevention programs. Previous studies have reported differences in the diagnosis between different anthropometric methods, so some students can be misclassified depending on the method used. OBJECTIVE: to evaluate the efficacy of different anthropometric methods to detect those university students in a probable status of overweight, including a comparison with a new proposed method, the normalized weight-adjusted index (NWAI)...
March 1, 2018: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/29754530/compression-with-23-mmhg-or-35-mmhg-stockings-after-saphenous-catheter-foam-sclerotherapy-and-phlebectomy-of-varicose-veins-a-randomized-controlled-study
#17
Attilio Cavezzi, Giovanni Mosti, Roberto Colucci, Valentina Quinzi, Luca Bastiani, Simone U Urso
Objectives To compare two different medical compression stockings after varicose vein treatment. Patients and methods A randomized single-blind controlled study on two compression regimes after saphenous catheter foam sclerotherapy + phlebectomy was performed. After pads and 5 mmHg contention sock, 23 mmHg (group A, Struva 23®) or 35 mmHg (group B, Struva 35®) medical compression stocking was applied 24 h/day for seven days; subsequently 21-23 mmHg medical compression stocking in daytime. Symptoms, compliance, skin findings, and bioimpedance spectroscopy parameters were assessed...
January 1, 2018: Phlebology
https://www.readbyqxmd.com/read/29750877/respiratory-induced-hemodynamic-changes-measured-by-whole-body-multichannel-impedance-plethysmography
#18
P Langer, P Jurák, V Vondra, J Halámek, M Mešťaník, I Tonhajzerová, I Viščor, L Soukup, M Matejkova, E Závodná, P Leinveber
The cardiovascular system is described by parameters including blood flow, blood distribution, blood pressure, heart rate and pulse wave velocity. Dynamic changes and mutual interactions of these parameters are important for understanding the physiological mechanisms in the cardiovascular system. The main objective of this study is to introduce a new technique based on parallel continuous bioimpedance measurements on different parts of the body along with continuous blood pressure, ECG and heart sound measurement during deep and spontaneous breathing to describe interactions of cardiovascular parameters...
May 10, 2018: Physiological Research
https://www.readbyqxmd.com/read/29750030/validation-of-exhaled-volatile-organic-compounds-analysis-using-electronic-nose-as-index-of-copd-severity
#19
Panaiotis Finamore, Claudio Pedone, Simone Scarlata, Alessandra Di Paolo, Simone Grasso, Marco Santonico, Giorgio Pennazza, Raffaele Antonelli Incalzi
Aim: Six-minute walking test distance (6MWD) and body mass index, obstruction, dyspnea and exercise (BODE) index are measures of functional status in COPD patients, but require space, time and patient's compliance. Exhaled volatile organic compounds (VOCs) analysis via electronic nose is a quick and easy method that has already been used to discriminate COPD phenotypes. The aim of this study is to evaluate whether VOCs analysis can predict functional status and its variation over time in COPD patients...
2018: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/29748651/advances-in-assessing-body-composition-during-pregnancy
#20
REVIEW
Jasper Most, Kara Lynn Marlatt, Abby Duhé Altazan, Leanne Maree Redman
The prevalence of excess gestational weight gain is increasing worldwide and is associated with pregnancy complications, including gestational diabetes mellitus, pre-eclampsia, preterm birth, macrosomia, and development of obesity in offspring. Whereas gestational weight gain positively correlates with the gain in fat mass (FM), fat-free mass (FFM) gain is relatively consistent across pregnancies. Commonly used methods to assess body composition include anthropometry, densitometry (air displacement plethysmography, underwater weighing), and hydrometry (isotope dilution, bioimpedance analysis)...
May 2018: European Journal of Clinical Nutrition
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