Abstract
We investigated the ability of whole body and segmental multiple frequency bioelectrical impedance (MFBIA) to detect peritoneal fluid in peritoneal dialysis patients. Prospective study. Teaching hospital renal unit. Patients on regular peritoneal dialysis. Whole body and segmental MFBIA measurements before and after drainage of peritoneal fluid. Changes estimated by MFBIA in total body water (-0.4 (0.8) litres) and extracellular water (-0.3 (0.3) litres) were much lower than the actual changes (2.0 (0.4) litres), P<0.0001. Derived resistances Recf and Ricf increased significantly for the trunk but not for total body measurements and changes did not correlate with volumes of fluid drained. MFBIA is limited in its ability to detect intraperitoneal fluid, using both whole body and segmental techniques.
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