Research

Loss of muscle mass is a key characteristic of malnutrition. Bioimpedance is an available technology capable of generating measures of lean tissue at the bed-side. We compared the utility of two different bioimpedance approaches, multiple-frequency bioelectrical impedance analysis (MF-BIA) and bioimpedance spectroscopy (BIS) in head and neck cancer (HNC) patients. Variables of interest were 50 kHz phase angle (PA), 200 kHz/5 kHz impedance ratio (IR), fat-free mass (FFM), total body water (TBW), extracellular water (ECW), and the ratio of ECW/TBW.

Bioelectric impedance analysis (BIA) is used to measure the body composition and total body water of normal subjects. The purpose of this study was to determine if the hydration of patients with burns could be assessed by BIA. Assessments of total body water as determined by BIA and the tritiated water method were prospectively compared.

The aim of this study was to evaluate changes in body fat stores in major burn injuries as determined by bioelectrical impedance. Nutritional needs directing the provided diet was assessed by indirect calorimetry.

To construct bivariate tolerance ellipses from impedance values normalized for height, which can be used in Mexican population for the assessment of body composition and compare them with others made in different populations.

Clinicians lack well-validated, non-invasive, objective tools to guide volume management in the post-resuscitative period. Bioimpedance analysis (BIA) represents a novel method for guiding fluid management. We studied the relationship of BIA vector length (VL), an indicator of volume status, to the need for mechanical ventilation in patients with sepsis.

Acute heart failure (AHF) still represents one of the major reasons for hospitalization. AHF patients present with an increase in total body water (TBW) content, which is related to the disease severity. For emergency department physicians, a rapid assessment of the TBW can help in the diagnosis and management of these patients.

Bio-electrical impedance (BI) analysis is a simple body composition method ideal for children. However, its utility in sick or malnourished children is complicated by variability in hydration. BI vector analysis (BIVA)
potentially resolves this, using a theoretical model that differentiates hydration from cell mass. We tested this model against reference methods in healthy children varying widely in age and nutritional status.

Change in hydration is common in children with severe acute malnutrition (SAM) including during treatment, but is difficult to assess. We investigated the utility of bio-electrical impedance vector analysis (BIVA), a quick non-invasive method, for indexing hydration during treatment.Utility of bio-electrical impedance vector analysis for monitoring treatment of severe acute malnutrition in children

This study explored whether the cachectic state assessed by bioimpedance vector analysis provides additional prognostic information about mortality from all causes.

The aim of this study was to investigate the association of fluid overload, measured by bioelectrical impedance vector analysis (BIVA) and also by accumulated fluid balance, with 30-day mortality rates in patients admitted to the emergency department (ED).