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Bioimpedance spectroscopy

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https://www.readbyqxmd.com/read/28107316/lymphedema-improving-screening-and-treatment-among-at-risk-breast-cancer-survivors
#1
Kelly Reichart
Inadequate peripheral lymphedema screening is a persistent gap in the provision of quality survivorship care at many breast cancer centers. Lymphedema should be identified and treated during the subclinical stage, when it is more likely reversible. The purpose of this project was to integrate a screening process for patients with breast cancer at risk for lymphedema, using bioimpedance spectroscopy via the L-Dex®, in a breast cancer center. A protocol was developed that included specific criteria for early patient referral to physical therapy...
February 1, 2017: Clinical Journal of Oncology Nursing
https://www.readbyqxmd.com/read/28093894/importance-of-body-water-in-the-efficacy-of-convective-solute-transport-in-online-hemodiafiltration
#2
Nicolás Macías, Alba Santos García, Almudena Vega Martínez, Soraya Abad Estébanez, Marian Goicoechea Diezhandino, Juan Manuel López Gómez
High-volume online hemodiafiltration (OL-HDF) has been associated with improved patient survival compared to conventional hemodialysis in recent trials, where the importance of convective volume (CV) in this benefit is noted. The purpose of this study was to determine the corporal composition parameters influencing the efficacy of CV in the removal of different molecular weight (MW) molecules. Demographic data, corporal composition parameters with bioimpedance spectroscopy, dialysis features and the reduction rates of different MW molecules in a four-hour OL-HDF session were collected in 61 patients...
January 16, 2017: Therapeutic Apheresis and Dialysis
https://www.readbyqxmd.com/read/28033125/validity-of-bmi-based-body-fat-equations-in-men-and-women-a-four-compartment-model-comparison
#3
Brett S Nickerson, Michael R Esco, Phillip A Bishop, Michael V Fedewa, Ronald L Snarr, Brian M Kliszczewicz, Kyung-Shin Park
The purpose of this study was to compare body mass index (BMI)-based body fat percentage (BF%) equations and skinfolds to a four-compartment (4C) model in men and women. One hundred and thirty adults (63 women and 67 men) volunteered to participate (age = 23±5 years). BMI was calculated as weight (kg) divided by height squared (m). BF% was predicted with the BMI-based equations of Jackson et al. (BMIJA), Deurenberg et al. (BMIDE), Gallagher et al. (BMIGA), Zanovec et al. (BMIZA), Womersley and Durnin (BMIWO) and from 7-site skinfolds using the generalized skinfold equation of Jackson et al...
December 20, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27992875/calf-resistivity-values-in-chronic-kidney-disease-in-a-caucasian-population
#4
Eric Seibert, Stephan G Müller, Johanna Pattmöller, Peter Kotanko, Fansan Zhu, Nathan W Levin, Roman Fiedler, Martin K Kuhlmann, Matthias Girndt
BACKGROUND: Continuous intradialytic calf bioimpedance spectroscopy (cBIS) allows assessment of changes in calf extracellular fluid volume (ECV) to determine dry weight (DW) in hemodialysis patients. During dialysis, calf ECV decreases until excessive ECV has been removed and normalized resistivity ρN,5 rises to values comparable to those of a normal population (cBIS-DW). It is not clear whether chronic kidney disease (CKD) itself influences ρN,5 and whether normal values depend on race and ethnicity...
December 20, 2016: Nephron
https://www.readbyqxmd.com/read/27869707/ex-vivo-characterization-of-bioimpedance-spectroscopy-of-normal-ischemic-and-hemorrhagic-rabbit-brain-tissue-at-frequencies-from-10-hz-to-1-mhz
#5
Lin Yang, Ge Zhang, Jiali Song, Meng Dai, Canhua Xu, Xiuzhen Dong, Feng Fu
Stroke is a severe cerebrovascular disease and is the second greatest cause of death worldwide. Because diagnostic tools (CT and MRI) to detect acute stroke cannot be used until the patient reaches the hospital setting, a portable diagnostic tool is urgently needed. Because biological tissues have different impedance spectra under normal physiological conditions and different pathological states, multi-frequency electrical impedance tomography (MFEIT) can potentially detect stroke. Accurate impedance spectra of normal brain tissue (gray and white matter) and stroke lesions (ischemic and hemorrhagic tissue) are important elements when studying stroke detection with MFEIT...
November 18, 2016: Sensors
https://www.readbyqxmd.com/read/27861264/use-of-b-mode-ultrasound-as-a-body-fat-estimate-in-collegiate-football-players
#6
Parker N Hyde, Kristina L Kendall, Ciaran M Fairman, Nicholas A Coker, Mary E Yarbrough, Steve J Rossi
Hyde, PN, Kendall, KL, Fairman, CM, Coker, NA, Yarbrough, ME, and Rossi, SJ. Utilization of B-mode ultrasound as a body fat estimate in collegiate football players. J Strength Cond Res 30(12): 3525-3530, 2016-The purpose of the present study was to validate a 7-site ultrasound imaging protocol to predict the percent body fat (%BF) in a division I football team. Body composition was estimated by ultrasound, 7-site skinfolds, and the 3-compartment-water (3C-W) model of Siri, using bioimpedance spectroscopy to estimate the total body water and air displacement plethysmography (using BODPOD) to determine the body density...
December 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27832647/extracellular-volume-overload-and-increased-vasoconstriction-in-patients-with-recurrent-intradialytic-hypertension
#7
Peter Noel Van Buren, Yunyun Zhou, Javier A Neyra, Guanghua Xiao, Wanpen Vongpatanasin, Jula Inrig, Robert Toto
BACKGROUND/AIMS: Intradialytic hypertension (IH) occurs frequently in some hemodialysis patients and increases mortality risk. We simultaneously compared pre-dialysis, post-dialysis and changes in extracellular volume and hemodynamics in recurrent IH patients and controls. METHODS: We performed a case-control study among prevalent hemodialysis patients with recurrent IH and hypertensive hemodialysis controls. We used bioimpedance spectroscopy and impedance cardiography to compare pre-dialysis, post-dialysis, and intradialytic change in total body water (TBW) and extracellular water (ECW), as well as cardiac index (CI) and total peripheral resistance index (TPRI)...
2016: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/27828939/determinants-of-body-composition-in-breastfed-infants-using-bioimpedance-spectroscopy-and-ultrasound-skinfolds-methods-comparison
#8
Zoya Gridneva, Anna R Hepworth, Leigh C Ward, Ching T Lai, Peter E Hartmann, Donna T Geddes
BACKGROUND: Accurate, noninvasive, and inexpensive methods are required to measure infant body composition. Ultrasound (US) and bioimpedance spectroscopy (BIS) have been validated in adults and introduced in pediatric populations. The aim of this study was to evaluate the performance of both methods in determining percentage fat mass (%FM) in breastfed infants. METHODS: %FM of 2, 5, 9, and 12 mo-old healthy, breastfed term infants (n = 58) was calculated using BIS-derived total body water equations and skinfold equations then compared with reference models...
December 21, 2016: Pediatric Research
https://www.readbyqxmd.com/read/27821919/bioelectrical-impedance-analysis-for-severe-stroke-patients-with-upper-extremity-hemiplegia
#9
Chanuk Yoo, Jaehyung Kim, Yeongae Yang, Jinsu Lee, Gyerok Jeon
[Purpose] This study is to analyze bioimpedance parameters and occupational assessment for severe stroke patients with upper extremity hemiplegia. [Subjects and Methods] Experimental subjects were 20 hemiplegic stroke patients receiving rehabilitation therapy between November to October, 2015. Prediction marker (PM), and phase angle (θ), a nd characteristic frequency (fc) were measured using bioelectrical impedance spectroscopy (MultiScan 5000). Bioelectrical impedance vector analysis (BIVA) was also obtained from the bioimpedance data...
October 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27811407/improved-electrode-positions-for-local-impedance-measurements-in-the-lung-a-simulation-study
#10
Jakob Orschulik, Rudolf Petkau, Tobias Wartzek, Nadine Hochhausen, Michael Czaplik, Steffen Leonhardt, Daniel Teichmann
Impedance spectroscopy can be used to analyze the dielectric properties of various materials. In the biomedical domain, it is used as bioimpedance spectroscopy (BIS) to analyze the composition of body tissue. Being a non-invasive, real-time capable technique, it is a promising modality, especially in the field of lung monitoring. Unfortunately, up to now, BIS does not provide any regional lung information as the electrodes are usually placed in hand-to-hand or transthoracic configurations. Even though transthoracic electrode configurations are in general capable of monitoring the lung, no focusing to specific regions is achieved...
December 2016: Physiological Measurement
https://www.readbyqxmd.com/read/27806008/impact-of-measured-vs-predicted-residual-lung-volume-on-body-fat-percentage-via-underwater-weighing-and-four-compartment-model
#11
Brett S Nickerson, Michael R Esco, Phillip A Bishop, Randall E Schumacker, Mark T Richardson, Michael V Fedewa, Jonathan E Wingo, Bailey A Welborn
The purpose of this study was to compare underwater weighing (UWW) and four-compartment (4C) model body fat percentage (BF%) for predicted vs. simultaneously measured residual lung volume (RLV). Forty-seven women and thirty-three men (age=22±5 years) had UWW and 4C model BF% determined using Boren et al. (RLVBOREN), Goldman and Becklake (RLVGB), and Miller et al. (RLVMILLER) RLV prediction equations. Criterion UWW BF% included body density (BD) values with simultaneous RLV. Criterion 4C model BF% included BD via UWW with simultaneous RLV, total body water via bioimpedance spectroscopy, and bone mineral content via dual energy x-ray absorptiometry...
October 27, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27798648/association-of-fluid-status-and-body-composition-with-physical-function-in-patients-with-chronic-kidney-disease
#12
Shih-Ming Hsiao, Yi-Chun Tsai, Hui-Mei Chen, Ming-Yen Lin, Yi-Wen Chiu, Tzu-Hui Chen, Shu-Li Wang, Pei-Ni Hsiao, Lan-Fang Kung, Shang-Jyh Hwang, Mei-Feng Huang, Yi-Chun Yeh, Cheng-Sheng Chen, Mei-Chuan Kuo
BACKGROUND: Impairment of physical function and abnormal body composition are the major presentations in patients with chronic kidney disease (CKD). The aim of this study is to investigate the relationship between body composition and physical function in CKD patients. METHODS: This cross-sectional study enrolled 172 of CKD stages 1-5 from February 2013 to September 2013. Handgrip strength (upper extremity muscle endurance), 30-second chair-stand test (lower extremity muscle endurance) and 2-minute step test (cardiorespiratory endurance) were used as indices of physical function...
2016: PloS One
https://www.readbyqxmd.com/read/27793064/hypertrophy-type-resistance-training-improves-phase-angle-in-young-adult-men-and-women
#13
A S Ribeiro, A Avelar, L Dos Santos, A M Silva, L A Gobbo, B J Schoenfeld, L B Sardinha, E S Cyrino
The main purpose of the present study was to investigate the effect of a hypertrophy-type resistance training protocol on phase angle, an indicator of cellular integrity, in young adult men and women. 28 men (22.2±4.3 years, 67.8±9.0 kg and 174.2±6.8 cm) and 31 women (23.2±4.1 years, 58.7±12.1 kg and 162.7±6.4 cm) underwent a progressive RT for 16 weeks (2 phases, 8 weeks each), 3 times per week, consisting of 10 to 12 whole body exercises with 3 sets of 8-12 repetitions maximum. Phase angle, resistance, reactance and total body water (intra and extracellular water compartments) were assessed by bioimpedance spectroscopy (Xitron 4200 Bioimpedance Spectrum Analyzer)...
January 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27677366/changes-in-body-composition-following-haemodialysis-as-assessed-by-bioimpedance-spectroscopy
#14
K Tangvoraphonkchai, A Davenport
BACKGROUND/OBJECTIVES: Patients with chronic kidney disease treated by haemodialysis (HD) are at increased risk of sarcopenia. Bioelectrical impedance spectroscopy (BIS) can be used to determine body composition, and is one of the several potential screening tools for sarcopenia. The newer generation of portable hand-held devices can be readily used in dialysis centres. The results from BIS devices using a two-compartmental model of body composition can be affected by hydration status and so ideally measurements should be made when patients are not overhydrated...
September 28, 2016: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27673568/intrarater-reliability-of-tonometry-and-bioimpedance-spectroscopy-to-measure-tissue-compressibility-and-extracellular-fluid-in-the-legs-of-healthy-young-people-in-australia-and-myanmar
#15
Janet Douglass, Patricia Graves, Susan Gordon
BACKGROUND: Measurements of tissue compressibility and extracellular fluid (ECF) are used to monitor progression of lymphedema, a chronic swelling of the subcutaneous tissue. Later stages of lymphedema are characterized by fibrotic induration in the subcutis and hyperkeratosis of the skin. Several devices are available to measure these changes, but previous reliability and validity studies have been conducted primarily on adult women with unilateral arm lymphedema using contralateral limbs as controls...
September 27, 2016: Lymphatic Research and Biology
https://www.readbyqxmd.com/read/27670250/phase-angle-and-impedance-ratio-reference-cut-points-from-the-united-states-national-health-and-nutrition-examination-survey-1999-2004-from-bioimpedance-spectroscopy-data
#16
Adam J Kuchnia, Levi M Teigen, Abigail J Cole, Urvashi Mulasi, M Cristina Gonzalez, Steven B Heymsfield, David M Vock, Carrie P Earthman
BACKGROUND: Raw bioimpedance parameters (eg, 50-kHz phase angle [PA] and 200-kHz/5-kHz impedance ratio [IR]) have been investigated as predictors of nutrition status and/or clinical outcomes. However, their validity as prognostic measures depends on the availability of appropriate reference data. Using a large and ethnically diverse data set, we aimed to determine if ethnicity influences these measures and provide expanded bioimpedance reference data for the U.S. POPULATION: HASH(0x4213770) METHODS: The National Health and Nutrition Examination Survey (NHANES) is an ongoing compilation of studies conducted by the U...
September 26, 2016: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/27669193/validity-of-selected-bioimpedance-equations-for-estimating-body-composition-in-men-and-women-a-four-compartment-model-comparison
#17
Brett S Nickerson, Michael R Esco, Phillip A Bishop, Randall Schumacker, Mark Richardson, Michael V Fedewa, Jonathan E Wingo, Bailey A Welborn
The purpose of this study was to compare body fat percentage (BF%) and fat-free mass (FFM) values from bioelectrical impedance analysis (BIA) equations to values determined from a four-compartment (4C) model. Eighty-two adults (42 men and 40 women) volunteered to participate (age = 23 ± 5 years). BF% and FFM were estimated from previously developed BIA equations by Chumlea et al. (BIACH), Deurenberg et al. (BIADE), Kyle et al. (BIAKYLE), and Sun et al. (BIASUN). 4C model body composition was derived from underwater weighing for body density, dual energy X-ray absorptiometry for bone mineral content, and bioimpedance spectroscopy for total body water...
September 20, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27666944/validating-body-fat-assessment-by-bioelectric-impedance-spectroscopy-in-taiwanese-hemodialysis-patients
#18
Paik Seong Lim, Chang Hsu Chen, Fansan Zhu, Peter Kotanko, Yachung Jeng, Chun Yu Hu, Li Shu Chiu, Hui-Chen Chang
OBJECTIVE: Obesity is becoming increasingly common in hemodialysis (HD) patients and is associated with inflammation and increased mortality. The primary aim of the present study was to evaluate the accuracy and variability of the bioimpedance device in measuring body fat in Taiwanese dialysis patients. DESIGN: Cross-sectional study. SUBJECTS: One hundred twenty-two adult patients receiving HD in a single hospital in Taiwan. SETTING: We compared the results of fat mass (FM) measured by dual-energy x-ray absorptiometry (DEXA) and bioelectrical impedance spectroscopy device (Body composition monitor, BCM)...
January 2017: Journal of Renal Nutrition
https://www.readbyqxmd.com/read/27647998/overhydration-negatively-affects-quality-of-life-in-peritoneal-dialysis-patients-evidence-from-a-prospective-observational-study
#19
Hye Eun Yoon, Young Joo Kwon, Ho Cheol Song, Jin Kuk Kim, Young Rim Song, Seok Joon Shin, Hyung Wook Kim, Chang Hwa Lee, Tae Won Lee, Young Ok Kim, Byung Soo Kim, Kyoung Hyoub Moon, Yoon Kyung Chang, Seong Suk Kim, Kitae Bang, Jong Tae Cho, Sung Ro Yun, Ki Ryang Na, Yang Wook Kim, Byoung Geun Han, Jong Hoon Chung, Kwang Young Lee, Jong Hyeok Jeong, Eun Ah Hwang, Yong-Soo Kim
UNLABELLED: Backgound: This study evaluated whether the hydration status affected health-related quality of life (HRQOL) during 12 months in peritoneal dialysis (PD) patients. METHODS: The hydration status and the HRQOL were examined at baseline and after 12 months using a bioimpedance spectroscopy and Kidney Disease Quality of Life-Short Form, respectively in PD patients. Four hundred eighty-one patients were included and divided according to the baseline overhydration (OH) value; normohydration group (NH group, -2L≤ OH ≤+2L, n=266) and overhydration group (OH group, OH >+2L, n=215)...
2016: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/27630580/recognition-of-fibrotic-infarct-density-by-the-pattern-of-local-systolic-diastolic-myocardial-electrical-impedance
#20
Gerard Amorós-Figueras, Esther Jorge, Tomás García-Sánchez, Ramón Bragós, Javier Rosell-Ferrer, Juan Cinca
Myocardial electrical impedance is a biophysical property of the heart that is influenced by the intrinsic structural characteristics of the tissue. Therefore, the structural derangements elicited in a chronic myocardial infarction should cause specific changes in the local systolic-diastolic myocardial impedance, but this is not known. This study aimed to characterize the local changes of systolic-diastolic myocardial impedance in a healed myocardial infarction model. Six pigs were successfully submitted to 150 min of left anterior descending (LAD) coronary artery occlusion followed by reperfusion...
2016: Frontiers in Physiology
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