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Endocrinología, Diabetes y Nutrición (English ed.) The hemisoma in which the bioelectrical impedance vector analysis is performed h...
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Vol. 72. Issue 9.
(November 2025)
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Vol. 72. Issue 9.
(November 2025)
Original article
The hemisoma in which the bioelectrical impedance vector analysis is performed has no influence on outcomes in patients receiving intravenous fluid therapy
El hemisoma en el que se realiza el análisis de la impedancia bioeléctrica no tiene influencia en los resultados en pacientes que reciben fluidoterapia intravenosa
Marina Jara Vidal
Corresponding author
marinajaravidal@hotmail.com

Corresponding author.
, Andrés Ruiz de Assín Valverde, Marta Gallach Martínez, Noel Roig Marín, César Gonzalvo Díaz, Rosa Pilar Quílez Toboso, Lourdes García Blasco, Silvia Aznar Rodríguez, José Juan Lozano García, José Joaquín Alfaro Martínez
Endocrinology and Nutrition Service, University Hospital Complex of Albacete, Spain
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Table 1. Characteristics of patients receiving intravenous fluids included in the study.
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Table 2. Electrical values as a function of hemisoma and the presence or absence of catheter (fluid).
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Table 3. Statistical results of the Passing–Block test.
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Abstract
Introduction

This study investigates the concordance of bioelectrical impedance vector analysis (BIVA) measurements in both hemisomes in patients receiving fluid therapy, since clinical practice suggests performing them in the hemisoma contralateral to that of its administration to avoid interferences.

The primary objective of this study was to evaluate the concordance of phase angle (PhA), resistance and reactance, both standardized by height (Rz/h, Xc/h) between the hemisoma where the patient is receiving iv fluids and the other one.

Methods

Clinical, prospective and descriptive study, which included 100 hospitalized patients with total parenteral nutrition (TPN) or other intravenous fluid therapy. BIVA measurements were taken in both hemisomes and analyzed by means of Bland–Altman plots, Passing–Block test and conditional method agreement trees (COAT).

Results

100 patients were included (57 men and 43 women), with an average age of 67.2±15.1 years. Univariate analysis using the Bland–Altman plot showed no concordance of PhA, Rz/h and Xc/h between both hemisomes in patients who received fluid therapy, but Passing–Block test showed no systematic or proportional differences between hemisomas and multivariate COAT analysis did not show that the specified covariates affected concordance.

Conclusions

No systematic or proportional differences between hemisomas in resistance and reactance has been demonstrated, suggesting the possibility of being able to perform the measurement independently of the side of fluid administration.

Keywords:
BIVA
Bioelectrical impedance
Body composition
Parenteral nutrition
Fluid therapy
Abbreviations:
ASMI
BIA
BIVA
CRF
PICC
CT
COAT
ICLA
CCC
DXA
FFM
FM
Average H
Z
BIA-MF
TPN
PhA
Xc
Rz
BIA-MS
BIA-SF
BIA-BIS
Z/h
Xc/h
Rz/h
Resumen
Introducción

Este estudio investiga la concordancia de las mediciones del análisis de vector de impedancia bioeléctrica (BIVA) en ambos hemisomas en pacientes que reciben fluidoterapia, ya que la práctica clínica sugiere realizarlas en el hemisoma contralateral al de su administración para evitar interferencias.

El objetivo principal de este estudio fue evaluar la concordancia del ángulo de fase (PhA), resistencia y reactancia, ambas estandarizadas por altura (Rz/h, Xc/h) entre el hemisoma en el que el paciente está recibiendo fluidos intravenosos y el contralateral.

Métodos

Estudio clínico, prospectivo y descriptivo, que incluyó 100 pacientes hospitalizados con nutrición parenteral total (NPT) u otra fluidoterapia intravenosa. Las mediciones de BIVA se realizaron en ambos hemisomas y se analizaron mediante gráficos de Bland-Altman, prueba de Passing Block y árboles de acuerdo de métodos condicionales (COAT).

Resultados

Se incluyeron 100 pacientes (57 hombres y 43 mujeres), con una edad media de 67,2±15,1 años. El análisis univariante mediante el gráfico de Bland-Altman no mostró concordancia de PhA, Rz/h y Xc/h entre ambos hemisomas en pacientes que recibieron fluidoterapia, el test Passing Block no mostró diferencias sistemáticas o proporcionales entre hemisomas y el análisis multivariante COAT no mostró que las covariables especificadas afectaran a la concordancia.

Conclusiones

No se han demostrado diferencias sistemáticas o proporcionales entre hemisomas en resistencia y reactancia, lo que sugiere la posibilidad de poder realizar la medición independientemente del lado de administración de fluidos.

Palabras clave:
BIVA
Bioimpedancia eléctrica
Composición corporal
Nutrición parenteral
Fluidoterapia

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