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  • Title: [Thoracic impedance in the determination of hydration following heart surgery under extracorporeal circulation].
    Author: Kessler G, Enders I, Schilling B.
    Journal: Anaesthesiol Reanim; 1990; 15(3):169-72. PubMed ID: 2393480.
    Abstract:
    Changes in thoracic water content are measurable by determining basic impedance (Zo). In 57 cardiac surgical patients Zo decreased postoperatively by an average 24% corresponding to water retention of about 1.51. On the second postoperative day the difference to the initial preoperative value was still 8.5% corresponding to a water amount of over 500 ml. A close mathematic correlation exists between changes in the basic impedance (delta Zo) and fluid balance with a correlation coefficient of 0.94. The simple, non-invasive method is suitable for therapeutic control of fluid balance and quantitative diagnosis of pulmonary hyperhydration forms of various causes.
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