Hand-to-Hand Model for Bioelectrical Impedance Analysis to Estimate Fat Free Mass in a Healthy Population

Equations for predicting body composition from bioelectrical impedance analysis (BIA) parameters are age-, sex- and population-specific. Currently there are no equations applicable to women of reproductive age in rural South Asia. Hence, we developed equations for estimating total body water (TBW), fat-free mass (FFM) and fat mass in rural Bangladeshi women using BIA, with 2H2O dilution as the criterion method. Women of reproductive age, participating in a community-based placebo-controlled trial of vitamin A or β-carotene supplementation, were enrolled at 19·7 (sd 9·3) weeks postpartum in a study to measure body composition by 2H2O dilution and impedance at 50 kHz using multi-frequency BIA (n 147), and resistance at 50 kHz using single-frequency BIA (n 82). TBW (kg) by 2H2O dilution was used to derive prediction equations for body composition from BIA measures. The prediction equation was applied to resistance measures obtained at 13 weeks postpartum in a larger population of postpartum women (n 1020). TBW, FFM and fat were 22·6 (sd 2·7), 30·9 (sd 3·7) and 10·2 (sd 3·8) kg by 2H2O dilution. Height2/impedance or height2/resistance and weight provided the best estimate of TBW, with adjusted R2 0·78 and 0·76, and with paired absolute differences in TBW of 0·02 (sd 1·33) and 0·00 (sd 1·28) kg, respectively, between BIA and 2H2O. In the larger sample, values for TBW, FFM and fat were 23·8, 32·5 and 10·3 kg, respectively. BIA can be an important tool for assessing body composition in women of reproductive age in rural South Asia where poor maternal nutrition is common.

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Changes in the electrical properties of the tissues in patients with anorexia nervosa measured by bioelectrical impedance analysis

European Psychiatry ◽

10.1016/j.eurpsy.2016.01.324 ◽

2016 ◽

Vol 33 (S1) ◽

pp. S163-S164

Author(s):

H. Karakula-Juchnowicz ◽

M. Teter ◽

G. Kozak ◽

A. Makarewicz ◽

J. Kalinowska ◽

...

Keyword(s):

Anorexia Nervosa ◽

Bioelectrical Impedance Analysis ◽

Bioelectrical Impedance ◽

Impedance Analysis ◽

Nutrition Status ◽

Control Group ◽

Healthy Population ◽

Extracellular Compartment ◽

Status Assessment ◽

Competing Interest

IntroductionMonitoring patient with anorexia nervosa (AN) include clinical, biological and psychological factors. In recent years many researchers criticize the BMI as useful measure for controlling evolution of AN.ObjectivesBioelectrical impedance analysis (BIA) is one of the main methods for nutritional status assessment.AimsThe aim of this study was the assessment of the nutrition status in a group of patients with anorexia nervosa in comparison to healthy population (HP).MethodsThe study involved 37 participants: 21 patients with AN and 16 healthy volunteers constituting the control group (HP). The patients were divided into two groups according a BMI: I group 14 < BMI < 15,5 (n = 11; age 18.0 ± 4.37) and II group: 15,5 < BMI < 17,5 (n = 10; age 17.82 ± 3.68). The mean age of HP was 17.68 ± 1.57 and BMI 20.56 ± 1.16 kg/m2. BIA was performed by using ImpediMed bioimpedance analysis SFB7 BioImp. The parameters: phase angle (PA), TBW%, ECW, ICW, ECW/ICW were analyzed.ResultsPA was decreased significantly in the I (4.5°±0,6) and II group (4.7°±0,6) of AN patients’ in comparison with HP (5.6°±0,7). TBW was 9% higher in I group and ECW was increased 6% in the both AN groups compared with HP (P < 0.01). Additionally ECW/ICW ratio indicated the higher transfer of water into the extracellular compartment in AN group (P < 0.01).ConclusionsBIA is accurate tool to indicate the valuable indicators of detecting malnutrition in AN. Further studies are needed to validate the significance of these parameters for the full identification of the nutrition status of AN patients’.Disclosure of interestThe authors have not supplied their declaration of competing interest.

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Bioelectrical Impedance Analysis Overestimates Fat‐Free Mass in Breast Cancer Patients Undergoing Treatment

Nutrition in Clinical Practice ◽

10.1002/ncp.10438 ◽

2019 ◽

Vol 35 (6) ◽

pp. 1029-1040

Author(s):

Kirsten Elizabeth Bell ◽

Schuyler Schmidt ◽

Amanda Pfeiffer ◽

Lisa Bos ◽

Carrie Earthman ◽

...

Keyword(s):

Breast Cancer ◽

Cancer Patients ◽

Bioelectrical Impedance Analysis ◽

Bioelectrical Impedance ◽

Impedance Analysis ◽

Fat Free Mass ◽

Breast Cancer Patients

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Assessment of fat-free mass from bioelectrical impedance analysis in men and women with Prader-Willi syndrome: cross-sectional study

International Journal of Food Sciences and Nutrition ◽

10.1080/09637486.2018.1554623 ◽

2019 ◽

Vol 70 (5) ◽

pp. 645-649 ◽

Cited By ~ 2

Author(s):

Giorgio Bedogni ◽

Graziano Grugni ◽

Gabriella Tringali ◽

Sofia Tamini ◽

Paolo Marzullo ◽

...

Keyword(s):

Bioelectrical Impedance Analysis ◽

Bioelectrical Impedance ◽

Impedance Analysis ◽

Cross Sectional Study ◽

Fat Free Mass ◽

Prader Willi Syndrome ◽

Sectional Study ◽

Cross Sectional ◽

Men And Women

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Bioelectrical impedance analysis of body composition for the anesthetic induction dose of propofol in older patients

BMC Anesthesiology ◽

10.1186/s12871-019-0856-x ◽

2019 ◽

Vol 19 (1) ◽

Author(s):

Ana M. Araújo ◽

Humberto S. Machado ◽

Amílcar C. Falcão ◽

Patrício Soares-da-Silva

Keyword(s):

Phase Angle ◽

Older Patients ◽

Bioelectrical Impedance Analysis ◽

Bioelectrical Impedance ◽

Total Body Weight ◽

Impedance Analysis ◽

Fat Free Mass ◽

Cross Sectional ◽

Old Patients ◽

Induction Dose

Abstract Background Older people are currently the fastest growing segment of the worldwide population. The present study aimed to estimate propofol dose in older patients based on size descriptors measured by bioelectrical impedance analysis (BIA). Methods A cross sectional study in adult and older patients with body mass index equal to or lower than 35 kg/m2 was carried out. BIA and Clinical Frail Scale scoring were performed during pre-operative evaluation. Propofol infusion was started at 2000 mg/h until loss of consciousness (LOC) which was defined by “loss of eye-lash reflex” and “loss of response to name calling”. Total dose of propofol at LOC was recorded. Propofol plasma concentration was measured using gas chromatography/ion trap-mass spectrometry. Results Forty patients were enrolled in the study. Total propofol dose required to LOC was lower in Age ≥ 65 group and a higher plasma propofol concentration was measured in this group. 60% of old patients were classified as “apparently vulnerable” or “frail” and narrow phase angle values were associated with increasing vulnerability scores. In the Age ≥ 65 group, the correlation analysis showed that the relationship between propofol dose and total body weight (TBW) scaled by the corresponding phase angle value is stronger than the correlation between propofol dose and TBW or fat free mass (FFM). Conclusions This study demonstrates that weight-based reduction of propofol is suitable in older patients; however FFM was not seen to be more effective than TBW to predict the propofol induction dose in these patients. Guiding propofol induction dose according to baseline frailty score should also be considered to estimate individualized dosage profiles. Determination of phase angle value appears to be an easy and reliable tool to assess frailty in older patients. Trial registration ClinicalTrials.gov Identifier: NCT02713698. Registered on 23 February 2016.

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Original Paper Relationships Between Indices of Arm Anthropometry, Bioimpedance, and Laboratory in Maintenance Hemodialysis Patients

10.21203/rs.3.rs-56288/v1 ◽

2020 ◽

Author(s):

Jenn-Yeu Wang ◽

Shu- Chin Chen ◽

Betau Hwang

Keyword(s):

Bioelectrical Impedance Analysis ◽

Clinical Laboratory ◽

Bioelectrical Impedance ◽

Impedance Analysis ◽

Hemodialysis Patients ◽

Fat Free Mass ◽

Single Frequency ◽

Maintenance Hemodialysis ◽

Upper Arm ◽

Muscle Area

Abstract Background Maintenance hemodialysis patients often experience protein- calorie malnutrition. Our aim is to evaluate the independent prediction accuracy of bioelectrical impedance analysis derived variables by the measurements of upper arm anthropometry and clinical laboratory indexes for evaluation of nutritional status of hemodialysis patients. Furthermore, the relationship between measurements of upper arm anthropometry and clinical laboratory indexes and cross –sectional evaluation of the prevalence of malnutrition with the use of the norms and thresholds were done. Methods In a cross- sectional survey of 32 stable hemodialysis patients (aged 28 to 82 years) in hemodialysis unit of Taipei Municipal Zhongxiao Hospital, we evaluated measurements of upper arm anthropometry with measurements of single frequency bioelectrical impedance analysis and clinical laboratory indexes. Results The comparisons between measurements of upper arm anthropometry with measurements of single frequency bioelectrical impedance analysis and some of clinical laboratory indexes were statistically significant. This study further found that both mid-arm fat area and triceps skin-fold thickness were independent contributors to percent fat mass after adjustment for body mass index and gender in the multiple regression models. This study also demonstrated that mid-arm muscle circumference, or mid-arm muscle area, or corrected mid-arm muscle area independently predicted height normalized indices of fat-free mass respectively after adjustment for body mass index and gender in the multiple regression models. The prevalence of protein wasting measured by mid-arm muscle circumference (50%) appears to be equivalent to that measured by serum albumin concentration (50%). Conclusions Mid-arm muscle and fat variables by upper arm anthropometry correlated with nutritional variables of single frequency bioelectrical impedance analysis and clinical laboratory indexes. Mid-arm muscle and fat variables by upper arm anthropometry were independent predictors of body composition regarding height-normalized indices of fat-free mass and percent fat mass of hemodialysis patients even after adjustment of gender and BMI.

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