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Changes in Bioimpedance Parameters and Basal Metabolic Rate after Heart Surgery. Comparison of a Simple and a Complicated Case

VAL058

Réka Kegyes Bozó

Presented at the Diets Conference 2, Frankfurt, September 2008

OBJECTIVE: Show changes in body composition due to cardiac surgery. Show changes in Basal Metabolic Rate (BMR) due to cardiac surgery.

DESIGN: Multifrequency bioimpedance analysis may provide insight into the compartmental changes. Cells are non-conductive at low frequency (5 kHz) current passes in the extracellular space. Integrity of the cells can be characterized by the measured impedance values at 200 kHz and 5 kHz Illness Marker (IM). Tracking IM over time cellular health can be predicted; may be a prognostic tool.

SUBJECTS/METHODS: Two age and gender matched patients undergone cardiac surgery were chosen. Body weight measured by digital scale to the nearest 0.1 kg. Body height measured by stadiometer to the nearest 0.1 cm. Bioimpedance measurements performed by a multifrequency device (Quadscan 4000 – Bodystat Ltd., Isle of Man). Measurements done 3 times: at admission, in the first 24 hours following surgery, before discharge.

CONCLUSION: Bioimpedance analysis is a simple, bed-side tool for tracking changes: in body composition of Illness Marker of Basal Metabolic Rate during hospitalization. Illness Marker can be used to raise the awareness of potential complicated clinical course. Individualized nutrition based upon the BMR is possible.

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