Medical Clinic New Glasgow - BIA or also known as Bioimpedance Analysis is a simple non invasive method utilized to be able to help determine the body's composition. BIA device accuracy would really depend on various factors like the frequency at which measurements are taken and the type of instrument utilized.
Initially utilized over 30 years ago, BIA machines determine the total water content of an individual's body. By means of passing an extremely minimal level electrical current through the body the impedance to the flow of the current can be determined.
BIA is primarily based on two main concepts. Firstly, the reality that the body has water as well as conducts electrolytes. Water is found in the cells inside a person's body, inside intracellular fluid or also known as ICF as well as outside the cells within the extracellular fluid or likewise known as ECF. At high frequencies the current goes through both the ICF and ECF whereas at low-level frequency, while a current goes through the ECF space it does not enter the cell membrane.
The next concept relates to the impedance of a geometrical system related to conductor length or its signal frequency over a cross sectional area. Putting all of the ideas together, a fixed value for the impedance could actually be measured from a fixed current going through a person's body. This flow is inversely proportional to the quantity of fluid. Total fluid determinations can actually be made specific for extracellular fluid by appropriate choice of signal frequency.
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