• Ugeskrift for laeger · Oct 1996

    [Thoracic electric impedance and fluid balance during aortic surgery].

    • F Jónsson, P Madsen, L G Jørgensen, M Lunding, and N H Secher.
    • Anaestesiologisk afdeling, Rigshospitalet, København.
    • Ugeskr. Laeg. 1996 Oct 28; 158 (44): 6256-9.

    AbstractIndices of fluid balance were evaluated during and after aortic surgery in 16 consecutive patients. Thoracic electrical impedance (TI), heart rate (HR), central venous (CVP), pulmonary artery mean (PAMP), pulmonary wedge (PWP) and mean arterial (MAP) pressures as well as fourteen arterial and venous blood gas variables were followed. Consistent with a reduction of TI during the operation, fluid balance was in excess, and it remained elevated on the first postoperative morning. The HR, MAP and PWP remained stable, while CVP and PAMP decreased. Of the determined variables only TI revealed a meaningful correlation to fluid balance (rho = -0.41; p < 0.01). The results indicate that while central venous and pulmonary artery mean pressures gave the impression of a volume deficit, the positive fluid balance was mirrored by thoracic electrical impedance.

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