Aplicaciones clínicas, limitaciones y valor pronóstico del análisis de bioimpedancia eléctrica en el paciente crítico: Revisión narrativa
DOI:
https://doi.org/10.70983/b8pb7z19Palabras clave:
Análisis de impedancia bioeléctrica, Composición corporal, Enfermedad crítica, Estado nutricionalResumen
El paciente crítico presenta alteraciones drásticas en la composición corporal, haciendo crucial su monitorización. Esta revisión narrativa resume la literatura sobre las aplicaciones clínicas, las limitaciones y el valor pronóstico del análisis de bioimpedancia eléctrica (BIA) en cuidados intensivos.
Se realizó una búsqueda sistemática en PubMed, Cochrane Library y Google Scholar utilizando términos MeSH y palabras clave relacionadas con BIA, composición corporal, estado nutricional y enfermedad crítica. Se seleccionaron artículos científicos y capítulos de libros pertinentes a los subtemas de investigación.
Debido a la reanimación hídrica, las ecuaciones predictivas tradicionales de la BIA sobreestiman la masa libre de grasa. La evidencia actual justifica emplear modelos de ajuste por sobrehidratación y priorizar parámetros celulares directos, como el análisis vectorial y el ángulo de fase (AF). El AF es un biomarcador subrogado útil para detectar el deterioro de la integridad celular y pérdida muscular. Su monitorización longitudinal tiene un alto valor pronóstico: un AF disminuido predice mayor mortalidad, ventilación prolongada y secuelas neuromusculares del síndrome post-UCI (debilidad adquirida en la UCI y disfagia post-extubación).
Interpretada con rigor metodológico, la BIA identifica la sobrehidratación, estratifica el riesgo de complicaciones y diagnostica fidedignamente las reservas corporales. Tras el egreso de la UCI, permite evaluar objetivamente la recuperación a largo plazo.
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Derechos de autor 2026 Juan Ramón Ballesteros-Villascan , Luis Fernando Cruz-Hernandez , Marycarmen Godínez-Victoria, Nadia Carolina Rodríguez-Moguel, Alan García-Grimaldo (Autor/a)
Esta obra está bajo una licencia internacional Creative Commons Atribución-NoComercial 4.0.
