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Bioelectrical impedance analyzers

There has been increasing interest in understanding body composition in early life and factors that may influence its evolution. While several technologies exist to measure body composition in infancy, the equipment is typically large, and thus not readily portable, is expensive, and requires a qualified operator. Bioelectrical impedance analysis shows promise as an inexpensive, portable, and easy to use tool. Despite the technique being widely used to assess body composition for over 35 years, it has been seldom used in infancy. This may be related to the evolving nature of the fat-free mass compartment during this period.
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Bioelectrical Impedance Analysis (BIA)

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Bioelectrical Impedance Analysis: Definition and Tips

Metrics details. Bioelectrical impedance analysis BIA is a simple, inexpensive, quick and non-invasive technique for measuring body composition. Peer Review reports. Loss of body weight and depletion of fat free muscle mass are common and serious problems in patients with chronic obstructive pulmonary disease COPD irrespective of the degree of airflow limitation [ 1 — 3 ]. Malnutrition in COPD has been associated with systemic inflammation, cachexia, anorexia, skeletal muscle dysfunction, dyspnoea, reduced health status, enhanced risk of exacerbations and increased mortality [ 4 — 8 ]. Surrogate measures such as the well-known Body Mass Index BMI give no indication of body composition, muscle mass or nutritional state.
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Bioelectrical Impedance Analysis

Bioelectrical impedance analysis BIA is a method for measuring body composition based on the rate at which an electrical current travels through the body. Body fat adipose tissue causes greater resistance impedance than fat-free mass and slows the rate at which the current travels. BIA scales estimate body fat percent using bioelectrical impedance analysis. You've probably seen body fat scales on store shelves or online that use bioelectrical impedance analysis. Since the scales can be expensive, you've probably wondered what is bioelectrical impedance analysis and is it worth paying for?
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Bioimpedance analysis is a noninvasive, low cost and a commonly used approach for body composition measurements and assessment of clinical condition. There are a variety of methods applied for interpretation of measured bioimpedance data and a wide range of utilizations of bioimpedance in body composition estimation and evaluation of clinical status. This paper reviews the main concepts of bioimpedance measurement techniques including the frequency based, the allocation based, bioimpedance vector analysis and the real time bioimpedance analysis systems. Commonly used prediction equations for body composition assessment and influence of anthropometric measurements, gender, ethnic groups, postures, measurements protocols and electrode artifacts in estimated values are also discussed.
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