| Summary: | Remote dielectric sensing (ReDS<sup>TM</sup>) is a novel technology that noninvasively quantifies lung fluid levels. Trends in ReDS values following hemodialysis remain uninvestigated. In a 64-year-old man with clinically stable hemodynamics, 2.7 L of fluid was drained during hemodialysis whereas the ReDS value remained almost unchanged (from 32 to 30%). In a 60-year-old woman with unstable hemodynamics, only 1.8 L of fluid was drained during hemodialysis, whereas ReDS value decreased considerably from 37 to 27%. Given our initial experience measuring ReDS values during hemodialysis, the ratio of fluid removal by hemodialysis between systemic plasma and lung fluid might vary in each patient. ReDS value might be a promising marker to determine the degree of fluid removal in addition to the conventional multidisciplinary index, particularly for those with unstable hemodynamics. The implications of ReDS-guided hemodialysis remain a future concern.
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