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"Bioimpedance"

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https://www.readbyqxmd.com/read/29455909/elevated-tissue-sodium-deposition-in-patients-with-type-2-diabetes-on-hemodialysis-detected-by-23-na-magnetic-resonance-imaging
#1
Christoph Kopp, Peter Linz, Carolin Maier, Peter Wabel, Matthias Hammon, Armin M Nagel, Daniela Rosenhauer, Stephan Horn, Michael Uder, Friedrich C Luft, Jens Titze, Anke Dahlmann
Long-term elevated blood sugar levels result in tissue matrix compositional changes in patients with diabetes mellitus type 2 (T2DM). We hypothesized that hemodialysis patients with T2DM might accumulate more tissue sodium than control hemodialysis patients. To test this,23 Na magnetic resonance imaging (23 Na MRI) was used to estimate sodium in skin and muscle tissue in hemodialysis patients with or without T2DM. Muscle fat content was estimated by1 H MRI and tissue sodium content by23 Na MRI pre- and post-hemodialysis in ten hemodialysis patients with T2DM and in 30 matched control hemodialysis patients...
February 15, 2018: Kidney International
https://www.readbyqxmd.com/read/29451589/active-brazilian-crack-cocaine-users-nutritional-anthropometric-and-drug-use-profiles
#2
Mariana Escobar, Juliana N Scherer, Cassia M Soares, Luciano S P Guimarães, Martine E Hagen, Lisia von Diemen, Flavio Pechansky
OBJECTIVE: To evaluate the nutritional status of crack users and to analyze its correlation with drug use profiles. METHODS: Cross-sectional study with 108 crack users. Anthropometric data were assessed through body mass index (BMI) and bioimpedance (BIA) measurements. A blood test to analyze hematocrit, hemoglobin, glucose, and lipid profiles was also performed. Crack use was determined through a standardized interview. RESULTS: Based on BMI and BIA, most individuals were eutrophic (about 70%)...
February 15, 2018: Revista Brasileira de Psiquiatria
https://www.readbyqxmd.com/read/29451295/evaluation-of-hif-1%C3%AE-and-inos-in-ischemia-reperfusion-gastric-model-bioimpedance-histological-and-immunohistochemical-analyses
#3
Eduardo Peña-Mercado, Mario Garcia-Lorenzana, Elena Arechaga-Ocampo, Claudia H González-De la Rosa, Nohra E Beltran
Gastrointestinal ischemia/reperfusion (I/R) generates pathological alterations that could lead to death. Early ischemic damage markers could be used to guide therapy and improve outcomes. AIM: To relate hypoxia-inducible factor 1α (HIF-1α) activation and inducible nitric oxide synthase (iNOS) expression to gastric impedance changes due to I/R damage. METHODS: Experimental animals were randomly distributed into 3 groups: control, ischemia (30 min) and I/R (60 min)...
February 16, 2018: Histology and Histopathology
https://www.readbyqxmd.com/read/29445518/why-do-endocrine-profiles-in-elite-athletes-differ-between-sports
#4
Peter H Sönksen, Richard I G Holt, Walailuck Böhning, Nishan Guha, David A Cowan, Christiaan Bartlett, Dankmar Böhning
Background: Endocrine profiles have been measured on blood samples obtained immediately post-competition from 693 elite athletes from 15 Olympic Sports competing at National or International level; four were subsequently excluded leaving 689 for the current analysis. Methods: Body composition was measured by bioimpedance in a sub-set of 234 (146 men and 88 women) and from these data a regression model was constructed that enabled 'estimated' lean body mass and fat mass to be calculated on all athletes...
2018: Clinical Diabetes and Endocrinology
https://www.readbyqxmd.com/read/29439257/assessing-extracellular-volume-in-hemodialysis-patients-using-intradialytic-blood-pressure-slopes
#5
Hao Liu, Rong Lu, Shani Shastri, Mark Sonderman, Peter Noel Van Buren
BACKGROUND/AIMS: Extracellular volume (ECV) overload is a mortality risk factor in hemodialysis patients, but no standard approach exists to objectively assess this clinically. We aimed to quantify relationships between slopes of repeated intradialytic blood pressure (BP) measurements and ECV. METHODS: In a cross-sectional study of 71 hemodialysis patients, we calculated BP slopes from all intradialytic measurements using Gaussian regression. We measured extracellular and total body water (TBW) with bioimpedance spectroscopy...
February 13, 2018: Nephron
https://www.readbyqxmd.com/read/29421542/leptin-levels-and-its-correlation-with-crack-cocaine-user-severity-a-preliminary-study
#6
Mariana Escobar, Juliana Nichterwitz Scherer, Felipe Ornell, Giovana Bristot, Cassia Medino Soares, Luciano Santos Pinto Guimarães, Lísia Von Diemen, Flavio Pechansky
BACKGROUND: Crack-cocaine is an important public health problem in Brazil and worldwide. It is a potent form of cocaine which results in rapid and damaging stimulating effects on the central nervous system through inhibition of the dopamine transporter. Some studies have suggested that both food and drugs - including crack, can act on the same brain reward mechanisms, altering the dopamine pathways that modulate behavioral responses. Our hypothesis was that leptin, a well-known peptide that modulates energy metabolism and appetite, can be used as a biomarker for drug use...
February 5, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29420149/muscle-glycogen-depletion-does-not-alter-segmental-extracellular-and-intracellular-water-distribution-measured-using-bioimpedance-spectroscopy
#7
Keisuke Shiose, Yosuke Yamada, Keiko Motonaga, Hideyuki Takahashi
Although each gram of glycogen is well known to bind 2.7-4.0 g of water, no studies have been conducted on the effect of muscle glycogen depletion on body water distribution. We investigated changes in extracellular and intracellular water (ECW and ICW) distribution in each body segment in muscle glycogen-depletion and glycogen-recovery condition using segmental bioimpedance spectroscopy technique (BIS). Twelve male subjects consumed 7.0 g.kg body mass-1 of indigestible (glycogen-depleted group) or digestible (glycogen-recovered group) carbohydrate for 24 hours after a glycogen-depletion cycling exercise...
February 8, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29414836/estimating-of-residual-kidney-function-by-multi-frequency-bioelectrical-impedance-analysis-in-hemodialysis-patients-without-urine-collection
#8
Ilia Beberashvili, Tatyana Yermolayeva, Anna Katkov, Nedal Garra, Leonid Feldman, Oleg Gorelik, Kobi Stav, Shai Efrati
BACKGROUND/AIMS: Residual kidney function (RKF) is a pivotal predictor of better clinical outcomes in maintenance hemodialysis (MHD) patients. So far there has been no attempt to use bioimpedance analysis (BIA) measurements to calculate residual glomerular filtration rate (GFR) in dialysis population. We hypothesized that performing of multi-frequency BIA at the beginning and end of hemodialysis session can enable us to predict the measured residual GFR in MHD patients. Thus our aim was to develop and validate a new RKF prediction equation using multi-frequency BIA in MHD patients...
January 31, 2018: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/29413107/bioimpedance-parameters-in-adolescent-athletes-in-relation-to-bone-maturity-and-biochemical-zinc-indices
#9
Josely Correa Koury, Astrogildo Vianna de Oliveira-Junior, Mariana Ribeiro Costa Portugal, Karla de Jesus Fernandes de Oliveira, Carmen Marino Donangelo
Phase angle (PA) is derived from resistance and reactance determined by bioimpedance analysis (BIA) and it appears to relate to cellular stability and integrity. Interpretation of PA values could be complemented by bioelectrical impedance vector analysis (BIVA), which relates to body hydration and structure. Body composition, age, sex, and nutrients are known to stabilize cell membranes, such as zinc, have been related to PA although information is scarce in adolescent athletes. The aim of the present study was to assess the association of body composition, skeletal maturity and zinc biochemical indices with phase angle and bioelectrical impedance parameters, in forty male adolescent soccer athletes (13...
March 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29407300/dual-energy-x-ray-absorptiometry-and-bioimpedance-analysis-are-clinically-useful-for-measuring-muscle-mass-in-kidney-transplant-recipients-with-sarcopenia
#10
M Yanishi, H Kinoshita, H Tsukaguchi, Y Kimura, Y Koito, E Jino, M Watanabe, M Sugi, T Matsuda
PURPOSE: Computed tomography (CT) is considered the gold standard method for the diagnosis and characterization of sarcopenia. The aim of the present study was to determine the correlation between the volume of psoas muscle measured using CT and the measurement of muscle mass with dual energy X-ray absorptiometry (DXA) and bioimpedance analysis (BIA) in kidney transplant recipients. METHODS: Fifty-eight recipients (42 males and 16 females) were enrolled. Diagnostic criteria for sarcopenia were according to those of the Asia Working Group for Sarcopenia...
January 2018: Transplantation Proceedings
https://www.readbyqxmd.com/read/29406309/addition-of-internal-electrodes-is-beneficial-for-focused-bioimpedance-measurements-in-the-lung
#11
Jakob Orschulik, Nadine Hochhausen, Michael Czaplik, Daniel Teichmann, Steffen Leonhardt, Marian Walter
Bioimpedance measurements are used in many biomedical applications, such as Bioimpedance Spectroscopy (BIS) or Electrical Impedance Tomography (EIT). While BIS measures and analyzes the impedance in a frequency range at constant electrode positions, EIT aims to reconstruct images of the conductivity distribution from multiple measurements at different electrode positions. Our aim is to add spatial information to BIS measurements by using electrode positions focus measurements on desired regions of interest...
February 6, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29402170/residual-limb-fluid-volume-change-and-volume-accommodation-relationships-to-activity-and-self-report-outcomes-in-people-with-trans-tibial-amputation
#12
Joan E Sanders, Robert T Youngblood, Brian J Hafner, Marcia A Ciol, Katheryn J Allyn, David Gardner, John C Cagle, Christian B Redd, Colin R Dietrich
BACKGROUND: Fluctuations in limb volume degrade prosthesis fit and require users to accommodate changes using management strategies, such as donning and doffing prosthetic socks. OBJECTIVES: To examine how activities and self-report outcomes relate to daily changes in residual limb fluid volume and volume accommodation. STUDY DESIGN: Standardized, two-part laboratory protocol with an interim observational period. METHODS: Participants were classified as "accommodators" or "non-accommodators," based on self-report prosthetic sock use...
February 1, 2018: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/29395372/a-high-whey-protein-vitamin-d-and-e-supplement-preserves-muscle-mass-strength-and-quality-of-life-in-sarcopenic-older-adults-a%C3%A2-double-blind-randomized-controlled-trial
#13
Yacong Bo, Changfeng Liu, Zhe Ji, Ruihong Yang, Qianqian An, Xueyuan Zhang, Jie You, Dandan Duan, Yafei Sun, Yiwei Zhu, Han Cui, Quanjun Lu
OBJECTIVE: Sarcopenia, an age-related decline of muscle mass, strength, and physical function, was associated with falls, frailty, and poor quality of life. The aim of the current study is to examine the effect of nutritional supplement containing whey protein, vitamin D and E on measures of sarcopenia. METHODS: A total of 60 sarcopenic older adult subjects participated in the current randomized, double-blind, placebo-controlled (iso-caloric control product) trial for 6 months...
January 9, 2018: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29386302/does-routine-bioimpedance-guided-fluid-management-provide-additional-benefit-to-non-anuric-peritoneal-dialysis-patients-results-from-compass-clinical-trial
#14
Kook-Hwan Oh, Seon Ha Baek, Kwon-Wook Joo, Dong Ki Kim, Yon-Su Kim, Sejoong Kim, Yun Kyu Oh, Byoung Geun Han, Jae Hyun Chang, Wookyung Chung, Ki Young Na
INTRODUCTION: In peritoneal dialysis (PD) patients, volume overload is related to cardiac dysfunction and mortality, while intravascular volume depletion is associated with a rapid decline in the residual renal function (RRF). This study sought to determine the clinical usefulness of bioimpedance spectroscopy (BIS)-guided fluid management for preserving RRF and cardiac function in PD patients. SUBJECTS AND METHODS: This is a multicenter, prospective, open-label study that was conducted over a 1-year period (NCT01887262)...
January 31, 2018: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
https://www.readbyqxmd.com/read/29376503/comment-on-on-the-correct-use-of-stepped-sine-excitations-for-the-measurement-of-time-varying-bioimpedance
#15
Gyözö G Láng, Dora Zalka
Many electrochemical/bioelectrochemical systems are intrinsically nonstationary and are affected by time-dependent phenomena. The requirement of stationarity in the classical version of impedance spectroscopy appears to be in conflict with the essential properties of the object, therefore a post-experimental mathematical/analytical procedure is necessary for the reconstruction of the "true" impedance spectra. In this communication, a method for the correction of the impedance data is discussed.
January 29, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29376499/reply-to-comment-on-on-the-correct-use-of-stepped-sine-excitations-for-the-measurement-and-identification-of-time-varying-bioimpedance
#16
Ebrahim Louarroudi, Benjamin Sanchez
The authors G. Lang and D. Zalka commented on our previous note (Louarroudi & Sanchez 2017), indicating interpolation as a suitable method to estimate the instantaneous impedance of a time-varying impedance from stepped-sine excitations. Here, we briefly delve into the underlying assumptions of the interpolation scheme and discuss the technical challenges awaiting future research.
January 29, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29370428/the-effect-of-high-volume-online-haemodiafiltration-on-nutritional-status-and-body-composition-the-protein-stores-preservation-peset-study
#17
Pablo Molina, Belén Vizcaíno, Mariola D Molina, Sandra Beltrán, Mercedes González-Moya, Antonio Mora, Cristina Castro-Alonso, Julia Kanter, Ana I Ávila, José L Górriz, Nuria Estañ, Luis M Pallardó, Denis Fouque, Juan J Carrero
Background: Compared with conventional haemodialysis (HD), online haemodiafiltration (OL-HDF) achieves a more efficient removal of uraemic toxins and reduces inflammation, which could favourably affect nutritional status. We evaluate the effect of OL-HDF on body composition and nutritional status in prevalent high-flux HD (HF-HD) patients. Methods: In all, 33 adults with chronic kidney disease (CKD) Stage 5 undergoing maintenance HF-HD were assigned to post-dilution OL-HDF (n = 17) or to remain on HF-HD (n = 16, control group) for 12 months...
January 22, 2018: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29363322/albuminuria-in-kidney-transplant-recipients-is-associated-with-increased-urinary-serine-proteases-and-activation-of-the-epithelial-sodium-channel
#18
Gitte Rye Hinrichs, Jannie Solmunde Michelsen, Rikke Zachar, Ulla Glenert Friis, Per Svenningsen, Henrik Birn, Claus Bistrup, Boye L Jensen
Albuminuria predicts adverse renal outcome in kidney transplant recipients. The present study addressed the hypothesis that albuminuria is associated with increased urine serine proteases with the ability to activate the epithelial sodium channel (ENaC) and with greater extracellular volume and higher blood pressure. In a cross-sectional design, kidney transplant recipients with (n=18) and without (n=19) albuminuria were included for office blood pressure measurements, estimation of volume status by bioimpedance, and collection of spot urine and plasma samples...
January 24, 2018: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29361075/function-shoulder-motion-pain-and-lymphedema-in-breast-cancer-with-and-without-axillary-web-syndrome-an-18-month-follow-up
#19
Linda A Koehler, David W Hunter, Anne H Blaes, Tufia C Haddad
Background: Axillary web syndrome (AWS) can develop following breast cancer surgery and presents as a tight band of tissue in the axilla with shoulder abduction. Objective: The objectives were to determine the prevalence and natural history of AWS, and the association between AWS and function, range of motion, pain, lymphedema, and body mass index (BMI). Design: This study was a longitudinal prospective cohort study utilizing a repeated measures design...
January 18, 2018: Physical Therapy
https://www.readbyqxmd.com/read/29360048/growth-and-body-composition-of-preterm-infants-less-than-or-equal-to-32%C3%A2-weeks-cohort-study
#20
Letícia Duarte Villela, Maria Dalva Barbosa Baker Méio, Vânia de Matos Fonseca, Andrea Dunshee de Abranches, Saint-Clair Gomes Junior, Ana Carolina Carioca da Costa, Maria M Murta, Sylvia Reis Gonçalves Nehab, Fernanda Valente Mendes Soares, Maria Elisabeth Lopes Moreira
BACKGROUND: Extremely preterm infants with weights less than the 10th percentile at discharge have a fat-free mass deficit. AIM: To analyze the relationship of weight Z-scores less than -2SD at term age with fat-free mass and fat mass at term age and at 1 and 3 months of corrected age in very preterm infants. STUDY DESIGN: COHORT STUDY: Subjects: Sixty-six preterm infants born before or at 32 weeks gestation with birth weight equal or greater than the 10th percentile for age were included at term age...
January 19, 2018: Early Human Development
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