THE USE OF THE BIOELECTRICAL IMPEDANCE VECTOR ANALYSIS

Authors

  • Ágnes SIMON-UGRON University of „Babeş-Bolyai” from Cluj-Napoca, Faculty of Physical Education and Sport. uagi77@yahoo.com
  • Maria-Daniela MACRA-OŞORHEAN University of „Babeş-Bolyai” from Cluj-Napoca, Faculty of Physical Education and Sport. maria.macra@ubbcluj.ro

Keywords:

bioelectrical impedance vector analysis, body composition, health, hydration.

Abstract

Bioelectrical impedance vector analysis (BIVA) is a non-invasive, quick and inexpensive technique to estimate body composition and healthcare assessment systems. This technique measures the opposition of body tissues to the flow of an alternating current of 800 μA at an operating frequency of 50 kHz, called bioelectrical impedance. This bioelectrical impedance (Z) consists of two components, resistance (R) and reactance (Xc). In biological structures, application of a constant low-level alternating current results in an impedance to the spread of the current that is frequency dependent. All biological structures have a specific resistance, defined as the strength of opposition by a tissue to the electric current flow. The living organism contains intra and extracellular fluids that behave as electrical conductors and cell membranes that act as electrical condensers and are regarded as imperfect reactive elements. BIVA is a pattern analysis of impedance measurements plotted as a vector in a coordinate system. Reference values adjusted for age, BMI and gender are plotted as so-called tolerance ellipses in the coordinate system. On this basis, a statement can be made with regard to water balance and body cell mass. Specific BIVA is a promising alternative to classic BIVA for assessing two-compartment body composition, with potential application in nutritional, sport and geriatric medicine.

Utilizarea analizei vectoriale prin bioimpedanță. Analiza vectorială prin bioimpedanță (BIVA) este o tehnică neinvazivă, rapidă și necostisitoare pentru a estima compoziția corporală. Această tehnică măsoară opoziția țesuturilor organismului la fluxul de curent alternativ de 800 μA la o frecvență de funcționare de 50 kHz, denumită impedanță bioelectrică.

Această impedanță bioelectrică (Z) este formată din două componente: de rezistență (R) și reactanță (Xc). În structurile biologice, aplicarea unui nivel scăzut de curent alternativ constant duce la o impedanță de răspândire a curentului, care este dependentă de frecvență. Toate structurile biologice au o rezistență specifică, definită ca puterea de opoziție a unui țesut la fluxul de curent electric. Organismul viu conține lichide intra- și extracelulare care se comportă ca conductori electrici, și membranele celulare care acționează în calitate de condensatoare electrice și sunt considerate ca elemente reactive imperfecte.

BIVA este o analiză model de măsurători de impedanță, reprezentate grafic ca un vector într-un sistem de coordonate. Valorile de referință ajustate pentru vârstă, IMC și de gen sunt reprezentate grafic ca așa-numitele elipse de toleranță în sistemul de coordonate. Pe această bază, o afirmație poate fi făcută în ceea ce privește echilibrul apei și masa celulară a corpului.

Din punct de vedere specific BIVA este o alternativă promițătoare pentru BIVA clasic pentru evaluarea compoziției corporale cu posibile aplicații în medicina nutrițională, sportivă și geriatrică.

Cuvinte cheie: analiza vectorială prin bioimpedanță, compoziția corporală, sănătate, hidratare.

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https://www.google.ro/search?q=biva+nomogram&source=lnms&tbm=isch&sa=X&ei=jkZgVOysHoKLaKvNgsAN&ved=0CAgQ_AUoAQ&biw=1280&bih=642#facrc=_&imgdii=_&imgrc=5_FynxOIoHInlM%253A%3BbrxmsG0sW9Y_9M%3Bhttp%253A%252F%252Fopeni.nlm.nih.gov%252Fimgs%252F512%252F25%252F3151484%252F3151484_10741_2011_9244_Fig1_HTML.png%3Bhttp%253A%252F%252Fopeni.nlm.nih.gov%252Fdetailedresult.php%253Fimg%253D3151484_10741_2011_9244_Fig1_HTML%2526req%253D4%3B488%3B263

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Published

2015-03-30

How to Cite

SIMON-UGRON, Ágnes, & MACRA-OŞORHEAN, M.-D. (2015). THE USE OF THE BIOELECTRICAL IMPEDANCE VECTOR ANALYSIS. Studia Universitatis Babeș-Bolyai Educatio Artis Gymnasticae, 60(1), 71–79. Retrieved from https://studia.reviste.ubbcluj.ro/index.php/subbeducatio/article/view/4711

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