scholarly journals Validity and Reliability of Micro-controller based BIA Instrument for Assessment of Upper and Lower limb in Male Subjects at Multi-Frequency

2021 ◽  
Vol 23 (08) ◽  
pp. 762-770
Author(s):  
Charu Pawar ◽  
◽  
Munna Khan ◽  
J.P. saini ◽  
◽  
...  
Keyword(s):  
Lower Limb ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Validity And Reliability ◽  
Standard Device ◽  
Left Limb ◽  
The Right ◽  
Result Analysis ◽  
Male Subjects ◽  
Error Percentage

The purpose of this study was to validate the resultant data for assessment of upper and lower limb for male subjects, using developed microcontroller based bioelectrical impedance analysis (BIA) instrument with standard device (Microprocessor based 4 channel auto mode T.E.N.S unit) at multi-frequency. Twenty-two male subjects of age 21-45 years were taken under the examination. Data measured by developed BIA instrument is validated with data recorded by standard device. The recorded data represent that the measured data varies with frequencies. The frequencies used for the measurement were 5 KHz, 50 KHz, 100 KHz, 250 KHz, and 500 KHz. The results indicates that impedance of upper and lower limb change according to the frequency variations, and reduces with the increment of the different frequencies. A result also indicates that impedance of the left limb is greater than the impedance of the right limb. The results analysis of upper limb shows that error percentage between developed BIA instrument and standard device is less than 1.93Ω for left arm and less than 1.50Ω for the right arm at the same frequencies. The result analysis of lower limb shows that mean error percentage between both instruments, for left leg is less than 3.37Ω and less than 2.78Ω for right leg.

A Prospective Study of Postoperative Lymphedema After Surgery for Cervical Cancer

2010 ◽  
Vol 20 (5) ◽  
pp. 900-904 ◽  
Author(s):  
Michael J. Halaska ◽  
Marta Novackova ◽  
Ivana Mala ◽  
Marek Pluta ◽  
Roman Chmel ◽  
...  
Keyword(s):  
Cervical Cancer ◽  
Lower Limb ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Conservative Surgery ◽  
Cancer Surgery ◽  
Lower Limbs ◽  
Control Group ◽  
The Right ◽  
A Prospective Study

Objective:Lymphedema is a severe postoperative complication in oncological surgery. Multifrequency bioelectrical impedance analysis (MFBIA) is a new method for early lymphedema detection. The objective was to establish the methodology of MFBIA for lower-limb lymphedema and to detect a lymphedema in patients undergoing cervical cancer surgery.Methods:From a population of 60 patients undergoing cervical cancer surgery, 39 underwent radical hysterectomy Wertheim III (RAD group), and 21 underwent conservative surgery (laparoscopic lymphadenectomy plus simple trachelectomy/simple hysterectomy - CONS group). A control group of 29 patients (CONTR group) was used to determine the SD of impedance at zero frequency (R0). Patients were examined before surgery and at 3 and 6 months after surgery by MFBIA and by measuring the circumference of the lower limbs.Results:No differences were found between the CONS and RAD groups on age, height, weight, and histopathologic type of tumor. However, the number of dissected lymph nodes differed significantly between the groups (17.3 in the CONS group vs 25.8 in the RAD group,P= 0.0012). The SD ofR0in the CONTR group was 36.0 and 39.0 for the right and the left leg, respectively. No difference in prevalence of lymphedema based on circumference method was found (35.9% in the RAD and 47.6% in the CONS groups, not statistically significant).Conclusions:No difference in the prevalence of lymphedema was found between the CONS and RAD groups. A methodology for MFBIA for the detection of lower-limb lymphedema was described.

Predicting composition of leg sections with anthropometry and bioelectrical impedance analysis, using magnetic resonance imaging as reference

1999 ◽  
Vol 96 (6) ◽  
pp. 647-657 ◽  
Author(s):  
N. J. FULLER ◽  
C. R. HARDINGHAM ◽  
M. GRAVES ◽  
N. SCREATON ◽  
A. K. DIXON ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Adipose Tissue ◽  
Magnetic Resonance ◽  
Coefficient Of Variation ◽  
Lower Limb ◽  
Bioelectrical Impedance Analysis ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Tissue Composition ◽  
Resonance Imaging

Magnetic resonance imaging (MRI) was used to evaluate and compare with anthropometry a fundamental bioelectrical impedance analysis (BIA) method for predicting muscle and adipose tissue composition in the lower limb. Healthy volunteers (eight men and eight women), aged 41 to 62 years, with mean (S.D.) body mass indices of 28.6 (5.4) kg/m2 and 25.1 (5.4) kg/m2 respectively, were subjected to MRI leg scans, from which 20-cm sections of thigh and 10-cm sections of lower leg (calf) were analysed for muscle and adipose tissue content, using specifically developed software. Muscle and adipose tissue were also predicted from anthropometric measurements of circumferences and skinfold thicknesses, and by use of fundamental BIA equations involving section impedance at 50 kHz and tissue-specific resistivities. Anthropometric assessments of circumferences, cross-sectional areas and volumes for total constituent tissues matched closely MRI estimates. Muscle volume was substantially overestimated (bias: thigh, -40%; calf, -18%) and adipose tissue underestimated (bias: thigh, 43%; calf, 8%) by anthropometry, in contrast to generally better predictions by the fundamental BIA approach for muscle (bias: thigh, -12%; calf, 5%) and adipose tissue (bias: thigh, 17%; calf, -28%). However, both methods demonstrated considerable individual variability (95% limits of agreement 20–77%). In general, there was similar reproducibility for anthropometric and fundamental BIA methods in the thigh (inter-observer residual coefficient of variation for muscle 3.5% versus 3.8%), but the latter was better in the calf (inter-observer residual coefficient of variation for muscle 8.2% versus 4.5%). This study suggests that the fundamental BIA method has advantages over anthropometry for measuring lower limb tissue composition in healthy individuals.

A Prospective Study in Detection of Lower-Limb Lymphedema and Evaluation of Quality of Life After Vulvar Cancer Surgery

2012 ◽  
Vol 22 (6) ◽  
pp. 1081-1088 ◽  
Author(s):  
Marta Novackova ◽  
Michael J. Halaska ◽  
Helena Robova ◽  
Ivana Mala ◽  
Marek Pluta ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Lower Limb ◽  
Bioelectrical Impedance Analysis ◽  
Vulvar Cancer ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Cancer Surgery ◽  
Control Group ◽  
Inguinofemoral Lymphadenectomy

BackgroundLower-limb lymphedema is one of the most disabling adverse effects of vulvar cancer surgery. Multifrequency Bioelectrical Impedance Analysis (MFBIA) is a modern noninvasive method to detect lymphedema. The first aim of this study was to prospectively determine the prevalence of secondary lower-limb lymphedema after surgical treatment for vulvar cancer using objective methods, circumference measurements and MFBIA technique. The second aim was to compare quality of life (QoL) before and 6 months after vulvar surgery.MethodsTwenty-nine patients underwent vulvar cancer surgery in our study: 17 underwent inguinofemoral lymphadenectomy (RAD), and 12 underwent sentinel lymph node biopsy (CONS). Patients were examined before and 6 months after vulvar surgery by measuring the circumference of the lower limbs and with MFBIA. A control group of 27 healthy women was also measured. To evaluate QoL, the European Organisation for Research and Treatment of Cancer (EORTC) QoL questionnaires (QLQ-C30 and QLQ-CX24) were administered to patients before and 6 months after surgery.ResultsUsing circumference measurement, 9 lymphedemas (31%) were diagnosed: 3 (25%) in the CONS and 6 (37.5%) in the RAD group (P= 0.69). After vulvar surgery, patients in the RAD group reported more fatigue and worsening of physical and role functioning. When comparing both groups, the RAD group had significantly worse parameters in social functioning, fatigue, and dyspnea.ConclusionsLower radicality in inguinofemoral lymphadenectomy shows a trend toward lower morbidity and significantly improves QoL. Multifrequency Bioelectrical Impedance Analysis was tested in these patients as a noninvasive, objective method for lymphedema detection. Detection of lymphedema based on subjective evaluations proved to have an unsatisfactory sensitivity. Less radical surgery showed objectively better results in QoL.

Bioelectrical Impedance Analysis of Water Reduction in Lower-Limb Lymphedema by Lymphaticovenular Anastomosis

2018 ◽  
Vol 35 (04) ◽  
pp. 306-314 ◽  
Author(s):  
Yoshichika Yasunaga ◽  
Daisuke Yanagisawa ◽  
Erika Ohata ◽  
Kiyoshi Matsuo ◽  
Shunsuke Yuzuriha
Keyword(s):  
Lower Limb ◽  
Bioelectrical Impedance Analysis ◽  
Linear Regression Analysis ◽  
Reduction Rate ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Body Water ◽  
Volume Reduction ◽  
Water Volume ◽  
The Mean

Background Although lymphedema is fundamentally abnormal accumulation of excess water in the extracellular space, previous studies have evaluated the efficacy of physiological bypass surgery (lymphaticovenular anastomosis [LVA]) for lymphedema without measuring water volume. This study clarified the water reductive effect of LVA using bioelectrical impedance analysis (BIA). Methods The efficacy of LVA for unilateral lower-limb lymphedema was evaluated using BIA in a retrospective cohort. The water volume of affected and unaffected legs was measured using multifrequency BIA before and after LVA. Preoperative measurements were undertaken after compression therapy for at least 3 months. The follow-up period after LVA was a minimum of 6 months. Results Thirty consecutive patients with unilateral lower-limb lymphedema were enrolled. The mean water volume reduction of the affected leg by LVA (ΔLBW) was 0.86 L (standard deviation [SD]: 0.86, median: 0.65) with a mean number of 3.3 anastomoses (SD: 1.7). The mean reduction rate of edema was 45.1% (SD: 36.3). Multiple linear regression analysis revealed water volume difference between the affected and unaffected legs before LVA (excess LBW) as the strongest predictor of ΔLBW (R 2 = 0.759, p < 0.01; β = 0.500, p < 0.01). Conclusion The LVA reduces the volume of accumulated body water in lower-limb lymphedema. As excess LBW most strongly predicted the amount of water volume reduction by LVA, body water volume measurement by BIA before LVA might identify patients with low excess LBW not expected to benefit from LVA, regardless of apparent differences in limb circumference.

Modeling upper and lower limb muscle volume by bioelectrical impedance analysis

2007 ◽  
Vol 103 (4) ◽  
pp. 1428-1435 ◽  
Author(s):  
Alexander Stahn ◽  
Elmarie Terblanche ◽  
Günther Strobel
Keyword(s):  
Lower Limb ◽  
Bioelectrical Impedance Analysis ◽  
Total Error ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Muscle Volume ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Low Frequencies ◽  
Appendicular Skeletal Muscle

Most studies employing bioelectrical impedance analysis (BIA) for estimating appendicular skeletal muscle mass using descriptive BIA models rely on statistical rather than biophysical principles. The aim of the present study was to evaluate the feasibility of estimating arm and leg muscle volume (MV) based on multiple bioimpedance measurements and using a recently proposed mathematical model and to compare this technique to conventional segmental BIA at high and low frequencies. MV of the arm and leg, respectively, was determined in 15 young, healthy, active men [age 22 ± 2 (SD) yr, total body fat 15.6 ± 5.1%] by magnetic resonance imaging (MRI) and BIA using a conventional and new bioimpedance model. MRI-determined MV for leg and arm was 6,268 ± 1,099 and 1,173 ± 172 cm3, respectively. Estimated MV by the new BIA model [leg: 6,294 ± 1,155 cm3 (50 kHz), 6,278 ± 1,103 cm3 (500 kHz); arm: 1,216 ± 172 cm3 (50 kHz), 1,155 ± 157 cm3 (500 kHz)] was not statistically different from MRI-determined MV (leg: P= 0.958; arm: P= 0.188). The new BIA model was superior to conventional BIA and performed best at 500 kHz for estimating leg MV as indicated by the lower relative total error [new: 3.6% (500 kHz), 5.2% (50 kHz); conventional: 7.6% (500 kHz) and 8.3% (50 kHz)]. In contrast, the new BIA model, both at 50 and 500 kHz, did not improve the accuracy for estimating arm MV [new: 10.8% (500 kHz), 10.6% (50 kHz); conventional: 11.8% (500 kHz), 11.4% (50 kHz)]. It was concluded that modeling of multiple BIA measurements has advantages for the determination of lower limb muscle volume in healthy, active adult men.

Evolution Of Subclinical Systemic Lymphedema In-Patient With Lipedema And Axillary Dissection

2020 ◽  
Vol 7 (07) ◽  
pp. 4868-4870
Author(s):  
Jose Maria Pereira de Godoy ◽  
Lívia Maria Pereira de Godoy ◽  
Maria de Fatima Guerreiro Godoy
Keyword(s):  
Breast Cancer ◽  
Upper Limb ◽  
Bioelectrical Impedance ◽  
Breast Cancer Case ◽  
Impedance Analysis ◽  
Cancer Case ◽  
Warning Sign ◽  
Normal Range ◽  
The Right ◽  
Surgical Treatments

Background: The surgical treatments of breast cancer associated or not with axillary drainage and radiotherapy constitute the main cause of secondary upper limb lymphedema. Obesity is a particularly aggravating aspect in patients with lymphedema. Novel concepts of subclinical systemic lymphedeman and clinical systemic lymphedema have recently been described. The aim of the present study was to evaluate the evolution of subclinical systemic lymphedema to upper limb lymphedema following treatment for breast cancer. Case: A 36-year-old female patient had been submitted to treatment for breast cancer involving left-side mastectomy and lymph node drainage during a pregnancy three years earlier. She had undergone both chemotherapy and radiotherapy. The patient had a portacath in the right arm for chemotherapy, which was removed after the first evaluation. She was submitted to bioelectrical impedance analysis, which revealed an increase in intracellular and extracellular water and body water in all limbs and the trunk above the normal range. The patient returned approximately two years after the initial evaluation, complaining of edema in the left arm. Conclusion: The treatment of breast cancer in patients with lipedema could lead to the development of subclinical lymphedema in patients with a BMI less than 30 kg/m2. Therefore, such conditions constitute a warning sign for the development of lymphedema.

Water Reductive Effect of Lymphaticovenular Anastomosis on Upper-Limb Lymphedema: Bioelectrical Impedance Analysis and Comparison with Lower-Limb Lymphedema

2020 ◽  
Vol 36 (09) ◽  
pp. 660-666 ◽  
Author(s):  
Yoshichika Yasunaga ◽  
Daisuke Yanagisawa ◽  
Yuta Nakajima ◽  
Shinei Mimura ◽  
Miharu Kobayashi ◽  
...  
Keyword(s):  
Upper Limb ◽  
Lower Limb ◽  
Bioelectrical Impedance Analysis ◽  
Reduction Rate ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Volume Reduction ◽  
Water Volume ◽  
Arm Lymphedema ◽  
The Mean

Abstract Background We previously examined the water reductive effect of lymphaticovenular anastomosis (LVA) using bioelectrical impedance analysis (BIA) measurement on lower-limb lymphedema and revealed mean water volume reduction and edema reduction rate by leg LVA to be 0.86 L and 45.1%, respectively. This study aimed to clarify the water reductive effect of LVA on arm lymphedema and compare its results with those for leg lymphedema. Patients and Methods The efficacy of LVA for unilateral arm lymphedema was evaluated using BIA in a retrospective cohort. Limb circumference and arm body water volume (ABW) of the affected and unaffected arms were measured before and after LVA. Mean water volume reduction (ΔABW) and edema reduction rate by arm LVA were compared with values for leg LVA cited from our previous report as a historical control. Results Nineteen consecutive patients were enrolled. The mean ΔABW and edema reduction rate by BIA were 0.267 L and 46.0%, respectively. The decreasing rate of ABW by BIA was significantly larger than those of the upper extremity lymphedema index and sum of 5 circumferences measurement methods. ΔABW could be predicted by a regression line based on the preoperative water volume difference between affected and unaffected limbs. The mean edema reduction rates for arm and leg LVA were comparable. Conclusion The water reductive effect of LVA on upper-limb lymphedema was demonstrated by BIA assessment. BIA can reflect the effect of LVA more sensitively than conventional objective measurements and may facilitate the interpretation of LVA results. Although water volume reduction by arm LVA was less than that by leg LVA, the edema reduction rates were comparable.

scholarly journals Measuring Body Composition in Individuals with Intellectual Disability: A Scoping Review

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Amanda Faith Casey
Keyword(s):  
Body Composition ◽  
Intellectual Disability ◽  
Waist Circumference ◽  
Scoping Review ◽  
Reliability And Validity ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Skinfold Thickness ◽  
Regression Equations ◽  
Validity And Reliability

Background. Research shows obesity to be more prevalent amongst individuals with intellectual disability (ID) making correct measurement of body composition crucial. This study reviewed the validity and reliability of methods used for assessing body composition in individuals with ID.Methods. Authors conducted electronic searches through PubMed (1990 to present) and PsycINFO (1990 to present) and assessed relevant articles independently based on scoping review guidelines. Reviewers included primary research related to the validity and reliability of body composition measures on individuals with ID.Results. Searches identified six articles assessing body composition methods used on individuals with ID including body mass index (BMI), skinfold thickness, bioelectrical impedance analysis (BIA), waist circumference, tibia length, and anthropometric girth measurements. BMI and waist circumference appear suitable measures but skinfold thickness measurements may not be advisable due to participants' noncompliance resulting in a lack of precision and inaccurate results.Conclusions. The current literature contains too few well-conducted studies to determine the precision and validity of body composition measures on individuals with ID. There may be a need to devise further regression equations that apply to individuals with specific types of ID in order to increase the reliability and validity of body composition measurements.

Sign in / Sign up

Export Citation Format

Share Document