Journal of Electrical Bioimpedance最新文献

{"title":"Electrical impedance myography as a marker of muscle mass in rats with simulated Anorexia Nervosa.","authors":"Megan E Rosa-Caldwell, Buket Sonbas Cobb, Lauren Breithaupt, Seward B Rutkove","doi":"10.2478/joeb-2025-0014","DOIUrl":"10.2478/joeb-2025-0014","url":null,"abstract":"<p><strong>Motivation: </strong>Anorexia Nervosa (AN) is characterized by a severe reduction in caloric intake resulting in substantial weight loss. Methods to evaluate muscle loss specifically during AN or following a weight recovery intervention are difficult to administer and expensive.</p><p><strong>Purpose: </strong>To evaluate the utility of electrical impedance myography (EIM) to assess changes to muscle mass during simulated AN and different durations of weight recovery in rats.</p><p><strong>Methods: </strong>Female Sprague-Dawley rats (n=11/group, total of 66 rats, 8 weeks old) were divided into simulated AN or healthy control conditions. Simulated AN included 30 days of 50-60% food restriction. Following AN intervention, rats were further subdivided into recovery cohorts which included five, fifteen, or thirty days of ab libitum food consumption to elicit weight gain. EIM was assessed at various stages of weight loss and recovery and correlated to metrics of muscle mass.</p><p><strong>Results: </strong>Various EIM parameters detected changes in muscle mass both during simulated AN and following weight restoration. The resistance parameter produced the most consistent results during simulated AN and following various stages of weight recovery. Moreover, the resistance parameter had the highest correlation with gastrocnemius mass (r = ~0.50, p<0.05). Maximal tetanic plantar flexion was also analyzed but did not correlate with any EIM parameters.</p><p><strong>Conclusion: </strong>EIM can non-invasively detect changes to muscle mass during AN and following various states of weight recovery.</p>","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"16 1","pages":"107-114"},"PeriodicalIF":0.0,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12351448/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144875711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Predictive classification and regression models for bioimpedance vector analysis: Insights from a southern Cuban cohort.","authors":"Jose Luis García Bello, Taira Batista Luna, My Phuong Pham-Ho, Minh Tho Nguyen, Alcibíades Lara Lafargue, Héctor Manuel Camué Ciria, Yohandys A Zulueta","doi":"10.2478/joeb-2025-0012","DOIUrl":"10.2478/joeb-2025-0012","url":null,"abstract":"<p><p>This study used predictive models to explore the link between bioparameters at characteristic frequency and their positions within tolerance ellipses in a southern Cuban cohort. The database includes 367 individuals (235 females, 132 males) aged 18-86. Among them, 61 had cancer, while 306 were healthy. After balancing the data, the analysis used 16 bioimpedance-based characteristics along with other anthropometric and location factors. The results showed that characteristic frequency bioparameters (Zc, θc, Xcc, and Rc) are key for assessing health and location. There was a strong agreement between experimental and predicted values for Zc, θc, Xcc, and Rc across various categories. Cancer patients showed higher Zc and slightly lower <i>θ</i> _<i>c</i> and Xcc values, attributed to unbalanced body composition and cell membrane deterioration. Females exhibited higher Zc and Xcc values, indicating better cell membrane integrity. Predictions are consistent across quartiles and percentiles, with lower <i>θ</i> _<i>c</i> observed in higher quartiles and centiles where more cancer patients are located. Variations in Rc values across different BIVA statuses demonstrated the model's robustness in estimating impedance parameters in diverse physiological conditions. These predictive models are significant for assigning locations without developing BIVA methods, enhancing clinical assessments and health monitoring.</p>","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"16 1","pages":"89-98"},"PeriodicalIF":0.0,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12337257/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144822812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing the consistency between the anthropometric method and bioelectrical impedance analysis when calculating the Heath-Carter somatotype in people without obesity: a cross-sectional study.","authors":"Kyialbek Sakibaev, Alexander Meshtel, Tatyana Grichanova, Kylychbek Suiunov, Abdyrakhman Eshiev, Sagynbek Dzholdubaev, Nazgul Tashmatova, Mirlan Nuruev, Aiperi Alimbekova, Akmaral Argynbaeva, Uulkan Manas Kyzy, Bekbolot Keneshbaev, Kulpunai Karimova","doi":"10.2478/joeb-2025-0013","DOIUrl":"10.2478/joeb-2025-0013","url":null,"abstract":"<p><p>Body physique assessment is important for various fields of science and practice, including anthropology, medicine, sports nutrition and pedagogy. The classic Heath-Carter method is complex and multi-step, while bioelectrical impedance analysis makes it easier and faster to evaluate this parameter. The purpose of this study is a comparative analysis of the anthropometric method and bio-electrical impedance analysis in assessing the somatotype. Differences and a low degree of agreement were found between these methods in determining the somatotype.</p><p><strong>Study design: </strong>Studies were carried out at the Department of Anatomy and Biological Anthropology of the Russian University of Sports \"SCOLIPE\" (Russia) and the morphological departments of the medical faculties of Osh State University (OshSU) of the Kyrgyz Republic from February to April 2024.</p><p><strong>Results: </strong>Bioelectrical impedance analysis quickly and more significantly speeds up the process of assessing a person's body type.</p><p><strong>Conclusion: </strong>Bioimpe-dance analysis shows an increased level of mesomorphy scores in both males and females, and the difference in males is more pronounced. On the other hand, endomorphy scores were lower when assessing the somatotype using the anthropometric method.</p>","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"16 1","pages":"99-106"},"PeriodicalIF":0.0,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12337254/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144822811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Early thrombus detection in ECMO with optimized impedance measurements: A simulative study.","authors":"Filip Slapal, Diogo F Silva, Steffen Leonhardt, Marian Walter","doi":"10.2478/joeb-2025-0011","DOIUrl":"10.2478/joeb-2025-0011","url":null,"abstract":"<p><p>Extracorporeal oxygenation supports patients with severe cardiac or respiratory failure, with the oxygenator providing critical gas exchange. Thrombus formation in the oxygenator can impair efficiency and increase risks such as hemolysis and embolism, but existing detection methods are limited in accuracy and timeliness. This study introduces a computational bioimpedance approach for early thrombus detection that integrates advanced modeling and machine learning techniques while preserving the oxygenator's functionality. We developed a finite element model of an oxygenator to simulate bioimpedance measurements using varied electrode configurations. Neural networks optimized electrode placement and injection-measurement patterns, enhancing sensitivity to conductivity changes. A second neural network was trained on simulated data to distinguish between normal and thrombus-affected conditions, achieving an F1-score exceeding 94% in classification tasks. Simulations demonstrated the feasibility of this method, with optimized configurations significantly improving detection accuracy. The findings suggest that computational bioimpedance, combined with neural network optimization, provides a robust framework for automated thrombus detection inside an oxygenator.</p>","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"16 1","pages":"80-88"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12258018/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144638344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wireless power system for left ventricular assist device: Influence of coil design and tissue behavior on efficiency.","authors":"Hawraa A Almorshidi, Ali Jafer Mahdi, Manal Hussain Nawir","doi":"10.2478/joeb-2025-0010","DOIUrl":"10.2478/joeb-2025-0010","url":null,"abstract":"<p><p>This paper proposes a compact wireless power transfer (WPT) system designed to energize an implanted heart pump. The design integrates several power converters: a buck-boost converter supplied by a 14-volt battery, an H-bridge inverter, a low-pass filter, and a resonant inductive coupling WPT unit. A resistive load of 40 ohms is used to simulate the equivalent pump's operation. To improve efficiency and limit power losses caused by high-frequency skin effects, a Litz wire is utilized. Consequently, a multi-layer transmission coil structure is employed to strengthen coupling and ensure deeper field penetration. The system operates in an open-loop configuration with manual adjustment of the DC-DC converter's duty cycle. A frequency of 6.78 MHz is selected based on the Industrial, Scientific, and Medical band due to its recognized safety and its ability to achieve deeper penetration into biological tissues. To optimize the design, precise mathematical modeling of both the WPT system and the tissue layers is conducted, simulating their impact on electromagnetic field behavior. Simulation results demonstrate an impressive power transfer efficiency of 91% across a separation of 60 mm. It is worth noting that most existing studies focus on low-power wireless energy delivery for internal medical devices; this research advances the field by targeting higher power demands, positioning it as a practical solution for critical applications like heart assist pumps.</p>","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"16 1","pages":"69-79"},"PeriodicalIF":0.0,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12239193/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144601830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel bioparameters derived from bioimpedance measurements for accurate prediction of weight status in infant-juvenile individuals: A regression analysis.","authors":"Taira Batista Luna, Jose Luis García Bello, Alcibíades Lara Lafargue, Héctor Manuel Camué Ciria, Yohandys A Zulueta","doi":"10.2478/joeb-2025-0009","DOIUrl":"10.2478/joeb-2025-0009","url":null,"abstract":"<p><p>In this study, a linear support vector machine regression model was used to explore the correlation between weight status and two novel bioparameters, specific resistance and reactance, in an infant-juvenile cohort from eastern Cuba. The model was trained using various characteristics, including bioimpedance measurements, to predict phase angle, specific resistance, and reactance with high accuracy. The results showed that the variation of these characteristics with weight status and sex is consistent with previous literature. Additionally, two robust bioparameters derived from bioimpedance measurements and anthropometric-physiological parameters were identified for predicting weight status. The predictive models developed in this study are essential for accurately assessing weight status and disease risks in infants and juveniles in the eastern Cuban region. These findings highlight the potential applications of bioimpedance measurements and bioparameters in health and disease risk assessment, contributing to the growing body of literature on this topic.</p>","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"16 1","pages":"62-68"},"PeriodicalIF":0.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12136677/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144227055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative analysis of body composition results of university students obtained using two bioimpedance analyzers.","authors":"Ma Fidelina Peñaloza-Talavera, Clara H Gonzalez-Correa, William Narvaez-Solarte, Izabella C Gomes-Santana-Pereira, Jhony A Diaz-Vallejo","doi":"10.2478/joeb-2025-0008","DOIUrl":"10.2478/joeb-2025-0008","url":null,"abstract":"<p><p>Body composition is a key health indicator that distinguishes between fat mass and lean mass, factors associated with the risk of metabolic and cardiovascular diseases. Among measurement methods, bioelectrical impedance analysis (BIA) is widely used, with single- and multi-frequency devices showing differences in performance.</p><p><strong>Objective: </strong>To compare the accuracy of the OMRON^® HBF-514C (single-frequency) and BIODY XPERT ZM II^® (multi-frequency) bioimpedance analyzers in measuring body composition in university students.</p><p><strong>Materials and methods: </strong>An observational, cross-sectional, and comparative study was con-ducted with 40 students (20 men, 20 women) from the University of Caldas, without a history of metabolic diseases. Body fat, muscle mass, basal metabolic rate (BMR), and BMI were measured using both devices. Data normality was assessed, and means were compared using the student's t-test (p < 0.05).</p><p><strong>Results: </strong>In women, Biody showed significantly higher values for body fat, muscle mass, and basal metabolic rate compared to Omron (p < 0.05), with no differences in BMI. In men, only muscle mass and basal metabolic rate were significantly higher with Biody (p < 0.05), with no differences in body fat or BMI.</p><p><strong>Conclusions: </strong>Biody showed significantly higher values than Omron for muscle mass and basal metabolic rate. In women, the differences exceeded the acceptable 5% variability, suggesting that multifrequency devices may offer greater consistency. Although no gold standard was used, Omron could be a valid alternative in men.</p>","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"16 1","pages":"56-61"},"PeriodicalIF":0.0,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12085985/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144095209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bioimpedance spectroscopy of breast phantoms.","authors":"Andrey Kuzmin, Viktor Baranov","doi":"10.2478/joeb-2025-0007","DOIUrl":"https://doi.org/10.2478/joeb-2025-0007","url":null,"abstract":"<p><p>This article is devoted to the study of the possibility of detecting breast tumors, which can be used for early diagnostics of breast cancer, by the dielectric impedance spectroscopy method. Dielectric impedance spectroscopy is a version of the bioimpedance spectroscopy method, based on the concept of breast tissue as a heterogeneous dielectric, the electrical and mathematical models of which are based on the Havriliak-Negami model. This opens the possibility of getting rid of direct mechanical and electrical contacts between the electrical impedance sensors of the mammograph and the skin. To determine the sensitivity of the dielectric impedance spectroscopy (DIS) method, a series of experiments was performed with phantoms with and without inclusion based on physiological solution (isotonic saline solution) and agar-agar. Using a special capacitive sensor and an LCR meter, the frequency response of the phantoms was determined. Analysis of the statistical characteristics of the differences in the frequency response curves showed significant differences (up to 8% for active R and 4% for reactive X components). The results confirmed the operability of the dielectric impedance spectroscopy method. An important direction for further research is to determine the most informative frequency range.</p>","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"16 1","pages":"50-55"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12008613/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144054789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase angle and extracellular edema predict risk of postoperative complications in total joint arthroplasties.","authors":"Natalie Nguyen, Michael C Marinier, Bryan Mouser, Victoria C Tappa, Marshall Rupe, Jacob M Elkins","doi":"10.2478/joeb-2025-0005","DOIUrl":"10.2478/joeb-2025-0005","url":null,"abstract":"<p><strong>Intro: </strong>Total knee arthroplasty (TKA) and total hip arthroplasty (THA) are common procedures that improve mobility but carry a risk of postoperative complications, particularly in patients with obesity. Body Mass Index (BMI) is traditionally used for risk assessment but does not account for muscle mass or fat distribution. Bioelectrical impedance analysis (BIA) provides a more detailed body composition evaluation. This study investigates the association between BIA-derived metrics and postoperative complications in TKA and THA, hypothesizing that these metrics are superior predictors compared to BMI.</p><p><strong>Methods: </strong>A retrospective cohort study was performed on 567 adult patients who underwent primary THA or TKA from January 2020 to December 2023. The data collected included demographic characteristics, comorbidities, preoperative laboratory values, preoperative BIA measurements and postoperative complications. Multivariate logistic regression models were developed to identify independent predictors of postoperative complications. Receiver operating characteristic (ROC) curves assessed the predictive accuracy of BIA-metrics models compared to BMI model.</p><p><strong>Results: </strong>In a cohort of 567 patients (55.7% female, median age 66), no significant difference in BMI was found between the complication and non-complication groups. However, the complication group had a higher ECW/TBW ratio (0.396 vs. 0.393, p = 0.011), higher ECW/ICW ratio (0.657 vs. 0.647, p = 0.012), and a lower phase angle (4.65 vs. 4.80, p = 0.039). Multivariate logistic regression analysis revealed that higher standardized ECW/TBW (OR 1.65, 95% CI 1.17-2.31, p = 0.004) and ECW/ICW z-scores (OR 1.61, 95% CI 1.15-2.23, p = 0.005) were associated with increased odds of postoperative complications, while a lower phase angle was protective (OR 0.58, 95% CI 0.37-0.91, p = 0.018). ROC analysis showed moderate predictive accuracy for ECW/TBW (AUC 0.71, 95% CI 0.62-0.79), ECW/ICW (AUC 0.70, 95% CI 0.62-0.79), and phase angle (AUC 0.69, 95% CI 0.60-0.79). In contrast, BMI was not significantly associated with complications, and BMI model demonstrated inferior predictive accuracy (AUC 0.61).</p><p><strong>Conclusion: </strong>ECW/TBW, ECW/ICW and phase angle are associated with postoperative complications in patients undergoing primary TKA or THA. These metrics provide better predictive accuracy than BMI enhancing preoperative risk stratification.</p>","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"16 1","pages":"35-42"},"PeriodicalIF":0.0,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11945341/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143732073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gender differences in the effects of skin hydration on electrodermal activity measurements.","authors":"Ardawan A Youssif, Dindar S Bari","doi":"10.2478/joeb-2025-0006","DOIUrl":"10.2478/joeb-2025-0006","url":null,"abstract":"<p><p>Electrodermal activity (EDA) is defined as a general term for all electrical behaviors in the skin, encompassing all active and passive electrical properties that can be traced back to the skin and its appendages. EDA measurements can be impacted by various factors and conditions. A factor of effect on EDA recordings, which has not been investigated before is the gender-related differences in the effects of skin hydration on EDA signals. Hence, this study aimed to study gender-related differences in the EDA parameters under conditions of skin hydration. 30 males and 30 females participated in this study under two different conditional (normal and hydration) experiments. Three EDA parameters (tonic and phasic components) were recorded from both groups. In the hydration experiment, 0.2 gram of 0.5% KCI in a 2% agar jelly was applied to the skin of all participants to moisturize their skin. The data from both experiments were analyzed to investigate gender-related differences in the effects of skin hydration on EDA measurements. It was found that EDA measurements, in particular the tonic component were not influenced by gender-related differences under hydration conditions. However, some significant (<i>p</i><0.05) differences were observed between males and females in certain phasic parameters in response to specific stimuli. This study suggests that skin hydration does not contribute to gender-related differences in EDA recordings. These results are probably important in EDA investigations and applications.</p>","PeriodicalId":38125,"journal":{"name":"Journal of Electrical Bioimpedance","volume":"16 1","pages":"43-49"},"PeriodicalIF":0.0,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11978434/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143812567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}