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Bioimpedance spectroscopy

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https://www.readbyqxmd.com/read/29136192/assessing-the-hydration-status-of-children-with-chronic-kidney-disease-and-on-dialysis-a-comparison-of-techniques
#1
Caroline S Y Eng, Devina Bhowruth, Mark Mayes, Lynsey Stronach, Michelle Blaauw, Amy Barber, Lesley Rees, Rukshana C Shroff
Background: Fluid balance is pivotal in the management of children with chronic kidney disease (CKD) and on dialysis. Although many techniques are available to assess fluid status, there are only a few studies for children, of which none have been comparable against cardiovascular outcome measures. Methods: We performed a longitudinal study in 30 children with CKD5-5D and 13 age-matched healthy controls (71 measurements) to determine a correlation between optimal weight by bioimpedance spectroscopy (Wt-BIS) and clinical assessment (Wt-CA)...
November 9, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29102374/body-composition-is-associated-with-clinical-outcomes-in-patients-with-non-dialysis-dependent-chronic-kidney-disease
#2
Ting-Yun Lin, Ching-Hsiu Peng, Szu-Chun Hung, Der-Cherng Tarng
An inverse relationship between body mass index (BMI) and mortality (the obesity paradox) has been found in patients with non-dialysis-dependent chronic kidney disease (CKD). However, it is unclear whether increased muscle mass or body fat confers the survival advantage. To resolve this we investigated the impact of body makeup on a composite outcome of death or cardiovascular events in a prospective cohort of 326 patients with stage 3-5 CKD not yet on dialysis. Lean mass and body fat were determined using the Body Composition Monitor, a multifrequency bioimpedance spectroscopy device, and were expressed as the lean tissue or fat tissue index, respectively...
November 1, 2017: Kidney International
https://www.readbyqxmd.com/read/29063664/reducing-chronic-breast-cancer-related-lymphedema-utilizing-a-program-of-prospective-surveillance-with-bioimpedance-spectroscopy
#3
Pat W Whitworth, Andrea Cooper
This single-institution experience evaluated the use of bioimpedance spectroscopy to facilitate early detection and treatment of breast cancer-related lymphedema (BCRL) in a cohort of 596 patients (79.6% high risk). Seventy-three patients (12%) developed an elevated L-Dex score with axillary lymph node dissection (P < .001), taxane chemotherapy (P = .008), and regional nodal irradiation (P < .001) associated. At last follow-up, only 18 patients (3%) had unresolved clinically significant BCRL requiring complete decongestive physiotherapy...
October 24, 2017: Breast Journal
https://www.readbyqxmd.com/read/29060669/electrical-bioimpedance-spectroscopy-as-biosensor-technique-to-identify-cells-lineages-and-cell-differentiation-process
#4
C I Guerrero-Robles, G J Vazquez-Zapien, M M Mata-Miranda, J E Noriega-Gonzalez, C A Gonzalez-Diaz
The identification and characterization of diverse cells types and cell differentiation process requires complex techniques as flow cytometry, immunocytochemistry and the exploration of molecular markers; such techniques require infrastructure and qualified personnel. The objective of this study was to analyze the use of Electrical Bioimpedance Spectroscopy (EBIS) measurements as a non-complex alternative technique to identify populations of undifferentiated mouse Pluripotent Stem Cells (mPSCs), Mouse Embryonic Fibroblasts (MEFs) and the differentiation process from preadipocytes (3T3-L1) to mature adipocytes...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060136/estimation-of-peripheral-blood-volume-and-interstitial-volume-in-hemodialysis-patients-using-bioimpedance-techniques
#5
Fansan Zhu, Peter Kotanko, Nathan W Levin
This paper describes a method to estimate interstitial fluid volume and peripheral blood volume (BVP) in hemodialysis (HD) patients using whole body (wBIS) and calf (cBIS) bioimpedance spectroscopy techniques. The aim of this study was to evaluate the usefulness of the technique. Thirty five HD patients were studied pre and post HD. Extracellular volume (ECV) and total body water (TBW) were measured using wBIS and cBIS. The calf resistances at 5 kHz (R5) and at 1000 kHz (R1000) respectively reflect ECV and TBW in the calf...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28991039/heavy-load-lifting-acute-response-in-breast-cancer-survivors-at-risk-for-lymphedema
#6
Kira Bloomquist, Peter Oturai, Megan L Steele, Lis Adamsen, Tom Møller, Karl Bang Christensen, Bent Ejlertsen, Sandra C Hayes
PURPOSE: Despite a paucity of evidence, prevention guidelines typically advise avoidance of heavy lifting in an effort to protect against breast cancer-related lymphedema. This study compared acute responses in arm swelling and related symptoms after low- and heavy-load resistance exercise among women at risk of lymphedema while receiving adjuvant taxane-based chemotherapy. METHODS: This is a randomized, cross-over equivalence trial. Women receiving adjuvant taxane-based chemotherapy for breast cancer who had undergone axillary lymph node dissection (n=21) participated in low- (60-65% 1 repetition maximum (RM), two sets of 15-20 repetitions) and heavy-load (85-90% 1RM, three sets of 5-8 repetition) upper-extremity resistance exercise separated by a one-week wash-out period...
October 4, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28960036/measurement-of-fluid-status-using-bioimpedance-methods-in-korean-pediatric-patients-on-hemodialysis
#7
Eun Mi Yang, Eujin Park, Yo Han Ahn, Hyun Jin Choi, Hee Gyung Kang, Hae Il Cheong, Il Soo Ha
Adequate fluid management is an important therapeutic goal of dialysis. Recently, bioelectrical impedance methods have been used to determine body fluid status, but pediatric reports are rare. To determine the accuracy of bioelectrical impedance methods in the assessment of body fluid statusof children undergoing hemodialysis (HD), 12 children on HD were studied. A multi-frequency bioimpedance analysis device (Inbody S10) and bioimpedance spectroscopy device (BCM) were used to evaluate fluid status. Fluid removal during a HD session (assessed as body-weight change, ΔBWt) was compared with the difference in total body water determined by each device (measured fluid difference, ΔMF), which showed strong correlation using either method (Pearson's coefficient, r = 0...
November 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/28956701/segmental-bioimpedance-informs-diagnosis-of-breast-cancer-related-lymphedema
#8
Brenda J Svensson, Elizabeth S Dylke, Leigh C Ward, Sharon L Kilbreath
BACKGROUND: Detection of lymphedema, particularly its mild stage, is clinically challenging. The aim of this study was to determine whether segmental bioimpedance spectroscopy (BIS) provided additional information to whole arm BIS in assessing women with or at risk of lymphedema following breast cancer. METHODS AND RESULTS: Participants (n = 66), aged 61.6 ± 10.5 years (mean ± standard deviation [SD]), were grouped according to lymphedema status: (1) at-risk (n = 24) had no indicators of lymphedema and (2) lymphedema (n = 42) were suspected to be developing lymphedema or had previously met lymphedema diagnostic criteria and undergone treatment...
September 28, 2017: Lymphatic Research and Biology
https://www.readbyqxmd.com/read/28955425/intra-abdominal-fat-comparison-of-computed-tomography-fat-segmentation-and-bioimpedance-spectroscopy
#9
Peter Finch
BACKGROUND: Intra-abdominal fat is an important factor in determining the metabolic syndrome/insulin resistance, and thus the risk of diabetes and ischaemic heart disease. Computed Tomography (CT) fat segmentation represents a defined method of quantifying intra-abdominal fat, with attendant radiation risks. Bioimpedance spectroscopy may offer a method of assessment without any risks to the patients. A comparison is made of these two methods. METHODS: This was a preliminary study of the utility of multifrequency bioimpedance spectroscopy of the mid abdomen as a measure of intra-abdominal fat, by comparison with fat segmentation of an abdominal CT scan in the -30 to -190 HU range...
June 2017: Malawi Medical Journal: the Journal of Medical Association of Malawi
https://www.readbyqxmd.com/read/28946965/testosterone-deficiency-in-dialysis-patients-difference-between-dialysis-techniques
#10
Secundino Cigarrán, Francisco Coronel, Enrique Florit, Jesús Calviño, Juan Villa, Lourdes Gonzalez Tabares, José Antonio Herrero, Juan Jesús Carrero
Testosterone deficiency is a prevalent condition in male patients with chronic kidney disease. However, it is not known whether the type of renal replacement therapy has an impact on testosterone deficiency that accompanies loss of renal function. METHODS: The cross-sectional study enrolled 79 prevalent male patients on dialysis; 43 on haemodialysis (HD) and 36 on peritoneal dialysis (PD). The median age was 69 years and 31.6% were diabetics. Endogenous testosterone levels were measured by immunoluminescence assay (normal range 3-10...
September 2017: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
https://www.readbyqxmd.com/read/28933052/erratum-to-utilization-of-bioimpedance-spectroscopy-in-the-prevention-of-chronic-breast-cancer-related-lymphedema
#11
David I Kaufman, Chirag Shah, Frank A Vicini, Marisa Rizzi
In the original publication of the article, under the heading, Study limitations in the Discussion section, the second paragraph, fifth sentence was published incorrectly as "Patients with an L-Dex increase of ≥ 5.5 undergo…sleeve for 4 weeks".
September 20, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28904881/numerical-expression-of-volume-status-using-the-bioimpedance-ratio-in-continuous-ambulatory-peritoneal-dialysis-patients-a-pilot-study
#12
Mun Jang, Won Hak Kim, Jung Hee Lee, Mi Soon Kim, Eun Kyoung Lee, So Mi Kim, Jai Won Chang
BACKGROUND: Volume overload results in higher mortality rates in patients on continuous ambulatory peritoneal dialysis (CAPD). The ratio of bioimpedance (RBI) might be a helpful parameter in adjusting dry body weight in CAPD patients. This study examined whether it is possible to distinguish between non-hypervolemic status and hypervolemic status in CAPD patients by using only RBI. METHODS: RBI was calculated as follows: RBI = impedance at 50 kHz/impedance at 500 kHz...
September 2017: Kidney Research and Clinical Practice
https://www.readbyqxmd.com/read/28902883/association-between-e-e%C3%A2-ratio-and-fluid-overload-in-patients-with-predialysis-chronic-kidney-disease
#13
Jae-Seok Kim, Jae-Won Yang, Jin Sae Yoo, Seung Ok Choi, Byoung-Geun Han
BACKGROUND: Chronic fluid overload is common in patients with chronic kidney disease (CKD) and can with time lead to diastolic dysfunction and heart failure. We investigated whether markers of fluid status, such as NT-proBNP and bioimpedance spectroscopy (BIS), can predict echocardiographic findings of diastolic dysfunction in non-dialysis CKD5 patients. METHODS: BIS, echocardiography, and measurement of serum NT-proBNP were performed in patients with non-dialysis CKD stage 5 at a single study visit...
2017: PloS One
https://www.readbyqxmd.com/read/28883854/predictive-abilities-of-baseline-measurements-of-fluid-overload-assessed-by-bioimpedance-spectroscopy-and-serum-n-terminal-pro-b-type-natriuretic-peptide-for-mortality-in-hemodialysis-patients
#14
Ianis Siriopol, Dimitrie Siriopol, Luminita Voroneanu, Adrian Covic
INTRODUCTION: Fluid overload is one of the most important, yet modifiable, risk factors associated with worse outcomes in hemodialysis (HD) patients. However, its precise assessment in clinical practice is still under investigation. MATERIAL AND METHODS: This is an observational prospective study which included 285 stable patients with end-stage renal disease on standard thrice-weekly HD therapy. Overhydration was assessed by the combination of relative fluid overload (RFO), using bioimpedance spectroscopy, and N-terminal pro-B-type natriuretic peptide (NT-proBNP)...
August 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28851933/intravenous-fluid-challenge-decreases-intracellular-volume-a-bioimpedance-spectroscopy-based-crossover-study-in-healthy-volunteers
#15
Matthäus Ernstbrunner, Barbara Kabon, Oliver Zotti, Markus Zeitlinger, Carolin Berner, Georg Hinterholzer, Marcus Säemann, Florian Frommlet, Edith Fleischmann, Manfred Hecking
The effects of intravenous fluid therapy on fluid compartments and hemodynamics of the human body remain enigmatic. We therefore tested the efficacy of bioimpedance spectroscopy in a crossover study, where 15 males received 0.5 ml/kg/min ELO-MEL-isoton (osmolarity = 302 mosmol/l) during 60 minutes, or nothing at all. In group "Fluid", fluid load increased from -0.2 ± 1.0 l extracellular volume at baseline to its maximum of 1.0 ± 0.9 l in minute 70, and remained continuously elevated throughout minute 300...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28834362/is-high-volume-online-hemodiafiltration-associated-with-malnutrition
#16
Nicolás Macías, Almudena Vega, Soraya Abad, Alba Santos, Santiago Cedeño, Tania Linares, Ana María García-Prieto, Inés Aragoncillo, Claudia Yuste, Juan Manuel López-Gómez
Chronic malnutrition is a common problem in patients with end-stage renal disease on hemodialysis. Some studies have reported albumin loss into dialysis fluid during postdilution online hemodiafiltration (OL-HDF). The aim of the study was to assess the nutritional status of patients on high-volume OL-HDF and to demonstrate that higher convective clearances are not associated with malnutrition due to possible loss of nutrients with ultrafiltration. Demographic and clinical data, corporal composition with bioimpedance spectroscopy, dialysis features, albumin loss into dialysis fluid and laboratory parameters were collected in twenty-eight patients with ESRD undergoing postdilution OL-HDF with stable convective volumes over 28 L/session...
August 2017: Therapeutic Apheresis and Dialysis
https://www.readbyqxmd.com/read/28831632/utilization-of-bioimpedance-spectroscopy-in-the-prevention-of-chronic-breast-cancer-related-lymphedema
#17
David I Kaufman, Chirag Shah, Frank A Vicini, Marisa Rizzi
BACKGROUND: This analysis was performed to assess the impact of early intervention following prospective surveillance using bioimpedance spectroscopy (BIS) to detect and manage breast cancer-related lymphedema (BCRL). METHODS: From 8/2010 to 12/2016, 206 consecutive patients were evaluated with BIS. The protocol included pre-operative assessment with L-Dex as well as post-operative assessments at regular intervals. Patients with L-Dex scores >10 from baseline were considered to have subclinical BCRL and were treated with over-the-counter (OTC) compression sleeve for 4 weeks...
August 22, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28817729/comparison-of-bioimpedance-spectroscopy-and-x-ray-micro-computed-tomography-for-total-fat-volume-measurement-in-mice
#18
COMPARATIVE STUDY
Gaelle Aubertin, Amira Sayeh, Jean-Philippe Dillenseger, Estelle Ayme-Dietrich, Philippe Choquet, Nathalie Niederhoffer
Obesity and the metabolic syndrome are two pathologies whose prevalence are in a constant increase. Evaluation of the total fat mass but also of the distribution between visceral and subcutaneous adipose tissue are important factors while assessing the pathophysiology of these two pathologies. Computed tomography (CT) and bioimpedance (BIS) are the translational methods the most frequently used in human beings as well as in rodent models in longitudinal studies on adiposity and obesity. Surprisingly, no direct comparison of micro-CT and BIS was reported yet in mice...
2017: PloS One
https://www.readbyqxmd.com/read/28781137/bioimpedance-spectroscopy-a-technique-to-monitor-interventions-for-swelling-in-minor-burns
#19
Pippa Kenworthy, Tiffany L Grisbrook, Michael Phillips, Paul Gittings, Fiona M Wood, William Gibson, Dale W Edgar
The control of edema in burn injured patients is a priority as it can impede the wound healing process. Bioimpedance spectroscopy (BIS) has been identified as a method of swelling assessment that has merit after burns. The aim of this study was to examine the reliability and validity of BIS in the measurement of localised burn wound edema across (1) different dressing conditions (no dressing, non silver and silver dressings) and (2) three electrode positions. BIS resistance (R) was hypothesised to be inversely proportional to fluid (edema) volume...
August 3, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28764509/note-temperature-effects-in-the-modified-howland-current-source-for-electrical-bioimpedance-spectroscopy
#20
S Fernandez Santos, P Bertemes-Filho
The aim of this study is to show how the modified Howland current source (MHCS) is affected by temperature changes. The source has been tested in a temperature range from 20 to 70 °C and frequency range from 100 Hz to 1 MHz. Parameters like output current, output impedance, total harmonic distortion, and oscillation have been measured. The measurements were made inside a temperature controlled environment. It was showed that the MHCS is stable at temperatures below 70 °C. Operational amplifiers with a low temperature drift and matching resistor should be carefully considered in order to prevent oscillations at high temperatures...
July 2017: Review of Scientific Instruments
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