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Bioimpedance spectroscopy

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https://www.readbyqxmd.com/read/29754530/compression-with-23-mmhg-or-35-mmhg-stockings-after-saphenous-catheter-foam-sclerotherapy-and-phlebectomy-of-varicose-vein-a-randomized-controlled-study
#1
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/29725649/impact-of-misclassification-of-obesity-by-body-mass-index-on-mortality-in-patients-with-ckd
#2
Ting-Yun Lin, Paik-Seong Lim, Szu-Chun Hung
Introduction: Unlike the general population, a higher body mass index (BMI) is associated with greater survival among patients with chronic kidney disease (CKD). This "obesity paradox" may be due to limitations of BMI as a measure of adiposity in CKD. Both BMI and body fat percentage (BF%) are used to classify obesity, but outcomes may vary. Therefore, we investigated the 2 different cutoffs for diagnosing obesity (BMI ≥28 kg/m2 or BF% >25% for men and >35% for women) and the impact on all-cause mortality in CKD...
March 2018: KI Reports
https://www.readbyqxmd.com/read/29718469/pre-dialysis-fluid-status-pre-dialysis-systolic-blood-pressure-and-outcome-in-prevalent-haemodialysis-patients-results-of-an-international-cohort-study-on-behalf-of-the-mondo-initiative
#3
Marijke Dekker, Constantijn Konings, Bernard Canaud, Paola Carioni, Adrian Guinsburg, Magdalena Madero, Jeroen van der Net, Jochen Raimann, Frank van der Sande, Stefano Stuard, Len Usvyat, Yuedong Wang, Xiaoqi Xu, Peter Kotanko, Jeroen Kooman
Background: Pre-dialysis fluid overload (FO) associates with mortality and causes elevated pre-dialysis systolic blood pressure (pre-SBP). However, low pre-SBP is associated with increased mortality in haemodialysis patients. The objective of this study was to investigate the interaction between pre-dialysis fluid status (FS) and pre-SBP in association with mortality. Methods: We included all patients from the international Monitoring Dialysis Outcome Initiative (MONDO) database with a pre-dialysis multifrequency bioimpedance spectroscopy measurement in the year 2011...
April 27, 2018: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29691162/bioimpedance-spectroscopy-as-a-practical-tool-for-the-early-detection-and-prevention-of-protein-energy-wasting-in-hemodialysis-patients
#4
Marta Arias-Guillén, Eduardo Perez, Patricia Herrera, Bárbara Romano, Raquel Ojeda, Manel Vera, José Ríos, Néstor Fontseré, Francisco Maduell
OBJECTIVES: To evaluate whether body composition monitor (BCM) could be a practical instrument for nephrologists to assess nutritional status in patients on hemodialysis (HD) and whether it is more effective in identifying patients at highest risk of developing protein-energy wasting (PEW) alone or in combination with other tools currently used for that purpose. DESIGN: Observational cross-sectional study in 91 HD patients (60 ± 14 years, 70.3% male, 24 ± 4...
April 21, 2018: Journal of Renal Nutrition
https://www.readbyqxmd.com/read/29688512/greater-fluid-overload-and-lower-interdialytic-weight-gain-are-independently-associated-with-mortality-in-a-large-international-hemodialysis-population
#5
Manfred Hecking, Ulrich Moissl, Bernd Genser, Hugh Rayner, Indranil Dasgupta, Stefano Stuard, Andrea Stopper, Charles Chazot, Franklin W Maddux, Bernard Canaud, Friedrich K Port, Carmine Zoccali, Peter Wabel
Background: Fluid overload and interdialytic weight gain (IDWG) are discrete components of the dynamic fluid balance in haemodialysis patients. We aimed to disentangle their relationship, and the prognostic importance of two clinically distinct, bioimpedance spectroscopy (BIS)-derived measures, pre-dialysis and post-dialysis fluid overload (FOpre and FOpost) versus IDWG. Methods: We conducted a retrospective cohort study on 38 614 incident patients with one or more BIS measurement within 90 days of haemodialysis initiation (1 October 2010 through 28 February 2015)...
April 20, 2018: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29680929/evaluation-of-factors-affecting-time-to-achieve-dry-weight-among-hemodialysis-patients-using-bioimpedance-spectroscopy
#6
Amjad Khan, Amer Hayat Khan, Azreen Syazril Adnan, Syed Azhar Syed Sulaiman, Nafees Ahmad, Siew Hua Gan
BACKGROUND: Achieving and maintaining dry weight appears to be an effective strategy for controlling and maintaining normotension among hypertensive patients on hemodialysis (HD). OBJECTIVE: The present study aimed to determine the time at which the majority of patients achieve postdialysis dry weight using bioimpedance spectroscopy (BIS). METHODS: A total of 220 HD patients were prospectively assessed for fluid overload using the Fresenius body composition monitor (BCM)...
April 22, 2018: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/29650264/diagnostic-accuracy-of-bioimpedance-spectroscopy-in-patients-with-lymphedema-a-retrospective-cohort-analysis
#7
Evelyn S Qin, Mindy J Bowen, Wei F Chen
BACKGROUND: Bioimpedance spectroscopy (BIS) is used by healthcare specialists to diagnose lymphedema. BIS measures limb fluid content by assessing tissue resistance to the flow of electric current. However, there is debate regarding the validity of BIS in diagnosing early lymphedema. Indocyanine green (ICG) lymphography has been established as the most accurate diagnostic modality to date for lymphedema diagnosis. In this retrospective study, we test the sensitivity, specificity, and diagnostic accuracy of BIS in diagnosing lymphedema by referencing its results with ICG lymphography...
April 9, 2018: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/29620449/low-lean-tissue-mass-can-be-a-predictor-of-one-year-survival-in-hemodialysis-patients
#8
Aleksandra Rymarz, Julia Gibińska, Maria Zajbt, Wiesław Piechota, Stanisław Niemczyk
PURPOSE: Nutritional status has a significant impact on the outcomes in the dialysis population. The aim of this study was to evaluate the association between body composition and a one-year survival of hemodialysis patients. METHODS: Forty-eight patients with chronic kidney disease stage V treated with hemodialysis for more than three months were included. Body composition was assessed by bioimpedance spectroscopy (Body Composition Monitor, Fresenius Medical Care)...
November 2018: Renal Failure
https://www.readbyqxmd.com/read/29615750/impact-of-systemic-volume-status-on-cardiac-magnetic-resonance-t1-mapping
#9
Marlies Antlanger, Stefan Aschauer, Andreas A Kammerlander, Franz Duca, Marcus D Säemann, Diana Bonderman, Julia Mascherbauer
Diffuse myocardial fibrosis is a key pathophysiologic feature in heart failure and can be quantified by cardiac magnetic resonance (CMR) T1 mapping. However, increases in myocardial free water also prolong native T1 times and may impact fibrosis quantification. Thus far, the impact of systemic patient volume status remains unclear. In this study, native T1 time by CMR was investigated in hemodialysis (HD) patients (n = 37) and compared with healthy controls (n = 35). Volume status was quantified by bioimpedance spectroscopy and correlated with CMR T1 time...
April 3, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29596717/influence-of-body-composition-and-nutrition-parameters-in-handgrip-strength-are-there-differences-by-sex-in-hemodialysis-patients
#10
Cristina Garagarza, Ana Laura Flores, Ana Valente
BACKGROUND: Hemodialysis (HD) patients are vulnerable to multiple metabolic and nutrition derangements, leading to changes in body composition. Handgrip strength (HGS) has been used as a nutrition marker. We aimed to evaluate the relationship between HGS and lean tissue mass (LTM) with several parameters in HD patients and develop HGS predictive equations. METHODS: Cross-sectional study with 155 patients in HD treatment for ≥3 months. Body composition was assessed through bioimpedance spectroscopy...
December 18, 2017: Nutrition in Clinical Practice
https://www.readbyqxmd.com/read/29576357/longitudinal-changes-in-phase-angle-by-bioimpedance-in-intensive-care-patients-differ-between-survivors-and-non-survivors
#11
L H Ellegård, P Petersen, L Öhrn, I Bosaeus
BACKGROUND & AIMS: Intensive care (ICU) patients suffer from metabolic stress, creating a catabolic state which might disturb nutritional status and body composition. Alterations in body fluid compartments by disease or massive volume resuscitation could invalidate bioimpedance hydrometry. Still bioimpedance might give other information. METHODS: 52 ICU patients (35 male, 17 female, mean age 66 years), BMI 29,2 were assessed by bioimpedance spectroscopy. Phase angle (PhA) at 50 kHz was assessed...
April 2018: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/29559788/the-relationship-between-hydration-status-male-sexual-dysfunction-and-depression-in-hemodialysis-patients
#12
Kamal Hassan, Yotam Elimeleh, Mona Shehadeh, Hassan Fadi, Irina Rubinchik
Background: Disturbances in sexual function are common among dialysis patients. Normal erections require a complex balance of physiological, psychological, emotional, hormonal, neurological and vascular factors. This study examined a possible association of overhydration (OH) with male sexual dysfunction and depression in hemodialysis (HD) patients. Patients and methods: This cross-sectional study assessed hydration status by whole-body bioimpedance spectroscopy in patients on maintenance HD for more than 12 months...
2018: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/29527997/hand-grip-strength-is-associated-with-serum-testosterone-and-albumin-levels-in-male-kidney-transplant-recipients
#13
Bahar Gürlek Demirci, Siren Sezer, Emre Tutal, Turan Çolak, Saliha Uyanık, Mehmet Haberal
OBJECTIVES: In kidney transplant recipients, reduced muscle mass and hand-grip strength are associated with impaired nutritional status. Serum testosterone is highly associated with muscle strength in the general population. Here, we aimed to determine the associations among serum testosterone, hand-grip strength, and nutritional and inflammatory parameters, as well as graft function. MATERIALS AND METHODS: Our study included 144 stable male kidney transplant recipients from our renal transplant outpatient clinic...
March 2018: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/29511114/the-vital-study-and-overall-pooled-analysis-with-the-vips-non-invasive-stroke-detection-device
#14
Christopher P Kellner, Eric Sauvageau, Kenneth V Snyder, Kyle M Fargen, Adam S Arthur, Raymond D Turner, Andrei V Alexandrov
INTRODUCTION: Effective triage of patients with emergent large vessel occlusion (ELVO) to endovascular therapy capable centers may decrease time to treatment and improve outcome for these patients. Here we performed a derivation study to evaluate the accuracy of a portable, non-invasive, and easy to use severe stroke detector. METHODS: The volumetric impedance phase shift spectroscopy (VIPS) device was used to assign a bioimpedance asymmetry score to 248 subjects across three cohorts, including 41 subjects presenting as acute stroke codes at a major comprehensive stroke center (CSC), 79 healthy volunteers, and 128 patients presenting to CSCs with a wide variety of brain pathology including additional stroke codes...
March 6, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29489063/plasma-kallikrein-activates-the-epithelial-sodium-channel-in-vitro-but-is-not-essential-for-volume-retention-in-nephrotic-mice
#15
S Haerteis, A Schork, T Dörffel, B N Bohnert, R Nacken, M Wörn, M Xiao, D Essigke, A Janessa, A H Schmaier, E P Feener, H-U Häring, M Bertog, C Korbmacher, F Artunc
AIM: Recent work has demonstrated that activation of the epithelial sodium channel (ENaC) by aberrantly filtered serine proteases causes sodium retention in nephrotic syndrome. The aim of this study was to elucidate a potential role of plasma kallikrein (PKLK) as a candidate serine protease in this context. METHODS: We analysed PKLK in the urine of patients with chronic kidney disease (CKD, n = 171) and investigated its ability to activate human ENaC expressed in Xenopus laevis oocytes...
February 28, 2018: Acta Physiologica
https://www.readbyqxmd.com/read/29439257/assessing-extracellular-volume-in-hemodialysis-patients-using-intradialytic-blood-pressure-slopes
#16
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/29420149/muscle-glycogen-depletion-does-not-alter-segmental-extracellular-and-intracellular-water-distribution-measured-using-bioimpedance-spectroscopy
#17
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/29406309/addition-of-internal-electrodes-is-beneficial-for-focused-bioimpedance-measurements-in-the-lung
#18
Jakob Orschulik, Nadine Hochhausen, Michael Czaplik, Daniel Teichmann, Steffen Leonhardt, Marian Walter
OBJECTIVE: Bioimpedance measurements such as bioimpedance spectroscopy (BIS) or electrical impedance tomography (EIT) are used in many biomedical applications. 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 tetrapolar BIS measurements by using electrode positions that focus measurements on desired regions of interest...
March 29, 2018: Physiological Measurement
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
#19
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)...
March 2018: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
https://www.readbyqxmd.com/read/29376503/on-the-correct-use-of-stepped-sine-excitations-for-the-measurement-of-time-varying-bioimpedance
#20
G G Láng, D 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.
February 28, 2018: Physiological Measurement
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