SEGMENTAL BIOELECTRICAL-IMPEDANCE ANALYSIS - THEORY AND APPLICATION OF A NEW TECHNIQUE
SEGMENTAL BIOELECTRICAL-IMPEDANCE ANALYSIS - THEORY AND APPLICATION OF A NEW TECHNIQUE
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DOI：
10.1152/jappl.1994.77.1.98
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发表时间：
1994-07-01
影响因子：
3.3
通讯作者：
LOZIER, SL
中科院分区：
文献类型：
--
作者：
ORGAN, LW;BRADHAM, GB;LOZIER, SL
用于身体组成的生物电阻抗分析（BIA）基于体积导体模型，其产生类似于FFM的数学关系Ht（2）/R，其中Ht是身高，R是全身电阻或阻抗，并且FFM是无脂肪质量。虽然这种关系存在于人类主体中，但其强度和有用性受到相互矛盾的报道。本研究重新评估了BIA的理论和方法，并描述了一种测量节段性阻抗的新技术，该技术可能解决与当前全身阻抗方法相关的一些主要局限性。通过使用来自200名成人受试者的数据，分四个步骤开发了BIA的新理论和方法：1）提出了用基于电阻率的模型代替Ht（2）/R模型的基本原理，2）描述了用于节段性BIA的仅使用外周电极位点的实用六电极技术，3）基于新的分段BIA技术开发了脂肪重量的预测方程; 4）使用新的脂肪分布测量开发了脂肪分布的预测方程，这是阻抗方法学的潜在新用途，阻抗指数。
Bioelectrical impedance analysis (BIA) for body composition has been based on the volume conductor model that results in the mathematical relationship Ht(2)/R similar to FFM, where Ht is body height, R is whole body resistance or impedance, and FFM is fat-free mass. Although this relationship exists in the human subject, its strength and usefulness have been subject to conflicting reports. This study reassessed the theory and methodology of BIA and describes a new technique for measuring segmental impedance that may resolve some major limitations associated with the current whole body impedance methodology. By use of data from 200 adult subjects, a new theory and methodology for BIA were developed in four steps: 1) a rationale was presented for replacing the Ht(2)/R model by one based on electrical resistivity, 2) a practical six-electrode technique for segmental BIA that uses only peripheral electrode sites was described, 3) prediction equations for fat weight based on the new segmental BIA technique were developed, and 4) prediction equations for fat distribution, a potential new use of impedance methodology, were developed using a new measure of fat distribution, the impedance index.