Analyzers, Physiologic, Extracellular Limb Fluid, Electrical Impedance

Definition : Physiologic analyzers designed to measure the bioelectrical impedance in the extracellular fluid found in the limbs. These analyzers consist of a main unit with an instrument that includes a low-frequency electric signal generator that delivers an electric current in a spectrum of frequencies (e.g., up to one kHz) to determine the impedance of the extracellular fluid in the limbs, computerized circuits that analyze the impedance measurements using firmware, and detachable wires with electrodes at the distal end that are located on pre-determined areas on the patient limbs. The main unit also includes recording capabilities and a display to show the appropriate disposition of the electrodes on the patient limbs, the results of the measurement, and the impedance value changes from previous measurements. The analyzer generates an index intended to help physicians to identify the early stages of unilateral lymphedema in a limb (arm or leg) by following the index variation with time. The instrument may include an optional software for further data analysis in a standard personal computer.

Entry Terms : "Electrical Impedance Analyzers, Extracellular Limb Fluid" , "Extracellular Limb Fluid Electrical Impedance Analyzer" , "Lymphedema Early Detection Instruments" , "Unilateral Lymphedema Measuring Instruments, Tissue Impedance"

UMDC code : 31267

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