Extracellular and intracellular fluid volume monitoring during dialysis by multifrequency impedancemetry

ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs
Michel Y JaffrinA Le Gourrier

Abstract

Impedance techniques can, in principle, permit non-invasive monitoring of extracellular (Ve) and intracellular (Vi) fluid volumes during dialysis. The authors present a method that determines the resistances Re and Ri of extracellular and intracellular compartments, respectively, by extrapolating impedance measurement toward zero, as well as infinite frequencies, according to the Cole-Cole model of biologic issues. These measurements were made using a XITRON 4000 B impedance meter (Xitron Technologies Inc., San Diego, CA) at frequencies ranging from 5 kHz to 1 MHz. The fact that the body is not a cylindric, homogeneous conductor is taken into account by introducing shape factors ke and ki and different resistivities pe and pi for the extracellular and intracellular fluid compartments. Assuming that these four unknown parameters can be regarded as constant during dialysis, the authors obtain: [formula: see text] where subscript o denotes initial values at start of dialysis. Impedances were measured at 30 min intervals on 11 pediatric patients and two adults, whereas total body water volume was determined by measuring urea in collected dialysate. Without ultrafiltration, Ve and Vi do not change significantly in percentage whereas...Continue Reading

Citations

Feb 28, 2006·Kidney International·M KraemerV Wizemann
Jun 25, 1999·Research Quarterly for Exercise and Sport·D R Wagner, V H Heyward
Nov 9, 2012·Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association·Davina J TaiUNKNOWN Alberta Kidney Disease Network
Dec 4, 2001·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·T ShulmanR M Lindsay
Jun 13, 2002·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·Michel Y JaffrinMichel Tolani
Sep 6, 2017·Scientific Reports·Vaibhav MaheshwariPeter Kotanko
May 1, 1997·Medical & Biological Engineering & Computing·M MaasraniB Boudailliez
May 1, 1997·Medical & Biological Engineering & Computing·M Y JaffrinB Boudailliez
May 23, 2008·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·Gihad E NesrallahRobert M Lindsay
Jan 22, 2008·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·Arsh K Jain, Robert M Lindsay
Mar 12, 2008·Expert Review of Medical Devices·James R Matthie
Jun 6, 1998·Journal of Applied Physiology·J MatthieP Withers
May 10, 2002·The International Journal of Artificial Organs·M FenechU Malmen
May 1, 1997·Journal of Applied Physiology·A De LorenzoP Withers

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