Avaliação da aplicabilidade da bioimpedância à quantificação dos compartimentos fluidos corporais
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2013
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A bioimpedância parece ser especialmente adequada à medição não-invasiva de diversas variáveis fisiológicas. O presente estudo pretendeu averiguar se a quantificação da água corporal total e dos compartimentos intra e extracelular, obtida com um equipamento de análise baseada na bioimpedância, é relacionável com os valores das concentrações dos iões sódio, potássio e cloreto obtido a partir do ionograma do sangue venoso. Foram estudados 12 voluntários, de ambos os géneros, idade e condição de saúde variadas, embora sem qualquer patologia do foro hidro-electrolítico. As medições da água corporal foram obtidas com o Bodystat® QuadScan 4000 e o ionograma por potenciometria. Nas presentes condições experimentais, que apenas devem ser entendidas como uma abordagem preliminar às questões de investigação levantadas, não foram demonstradas relações entre as variáveis em estudo. Contudo, o interesse potencial e a praticabilidade do método, justificam novas abordagem que visem aumentar o número de paciente estudados e refinar a metodologia de análise.
Bioimpedance seems to be particularly suited to the non-invasive measurement eof several physiological variables. The present study aimed to ascertain whether the quantification of total body water and intracellular and extracellular fluid compartments, obtained through a bioimpedance-based analytical device, could be correlated with the concentration sodium, potassium and chloride ions, obtained from venous blood ionogram. Volunteers of both genders, of various ages and with various health conditions were studied. None of the volunteers suffered from any hydro-electrolytic disorder. Body water measurements were obtained by a Bodystat® QuadScan 4000 and ionogram obtained through potentiometry. Under the present experimental conditions, which should be considered merely a preliminary approach to the questions raised, no relations were established between the variables under study. However, the method´s potential interest and its practicability justifies further investigation. This would include increasing the number of patients studied and refining the methodology used.
Bioimpedance seems to be particularly suited to the non-invasive measurement eof several physiological variables. The present study aimed to ascertain whether the quantification of total body water and intracellular and extracellular fluid compartments, obtained through a bioimpedance-based analytical device, could be correlated with the concentration sodium, potassium and chloride ions, obtained from venous blood ionogram. Volunteers of both genders, of various ages and with various health conditions were studied. None of the volunteers suffered from any hydro-electrolytic disorder. Body water measurements were obtained by a Bodystat® QuadScan 4000 and ionogram obtained through potentiometry. Under the present experimental conditions, which should be considered merely a preliminary approach to the questions raised, no relations were established between the variables under study. However, the method´s potential interest and its practicability justifies further investigation. This would include increasing the number of patients studied and refining the methodology used.
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MEDICINA, FISIOLOGIA, MEDICINE, PHYSIOLOGY, FLUÍDOS CORPORAIS, BODY FLUIDS, BIOIMPEDÂNCIA, BIOIMPEDANCE, MEIOS DE DIAGNÓSTICO, DIAGNOSTIC PROCEDURES