Measuring In-Socket Residual Limb Volume Fluctuation

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Abstract􀀃 The􀀃 goal􀀃 of􀀃 this􀀃 project􀀃 is􀀃 a􀀃 useful􀀃 clinical􀀃 instrument􀀃 for􀀃 diagnosis􀀃 and􀀃 treatment􀀃 of􀀃 residual􀀃limb􀀃volume􀀃fluctuation􀀃in􀀃individuals􀀃who􀀃use􀀃prosthetic􀀃limbs.􀀃 The􀀃specific􀀃aims􀀃are􀀃to􀀃enhance􀀃our􀀃current􀀃bioimpedence􀀃analysis􀀃system􀀃to􀀃measure􀀃 in􀍲socket􀀃residual􀀃limb􀀃volume􀀃change.􀀃􀀃The􀀃intent􀀃is􀀃to􀀃create􀀃an􀀃effective􀀃tool􀀃for􀀃in􀍲 clinic􀀃 analysis􀀃 and􀀃 interpretation,􀀃 providing􀀃 a􀀃 quick􀀃 and􀀃 quantitative􀀃 indication􀀃 of􀀃 a􀀃 patient’s􀀃diurnal􀀃limb􀀃volume􀀃fluctuation􀀃status,􀀃insight􀀃into􀀃its􀀃source,􀀃and􀀃methods􀀃for􀀃 treatment.􀀃 To􀀃accomplish􀀃the􀀃aims􀀃our􀀃current􀀃bioimpedence􀀃instrument􀀃is􀀃enhanced.􀀃􀀃We􀀃create􀀃 custom􀀃 high􀍲fidelity􀀃 excitation􀀃 circuitry􀀃and􀀃 signal􀀃 processing􀀃 hardware􀀃 within􀀃 a􀀃 small􀀃 portable􀀃 unit􀀃 that􀀃 connects􀀃 wirelessly􀀃 to􀀃 a􀀃 base􀀃 computer.􀀃 Custom􀀃 data􀀃 processing􀀃 architectures􀀃and􀀃algorithms􀀃are􀀃created􀀃to􀀃allow􀀃quick􀀃and􀀃clear􀀃data􀀃presentation􀀃and􀀃 visualization.􀀃 􀀃 Because􀀃 insight􀀃 gained􀀃 from􀀃 our􀀃 previous􀀃 bioimpedance􀀃 studies􀀃 on􀀃 amputee􀀃 subjects􀀃 is􀀃 extensive,􀀃 these􀀃 needs􀀃 are􀀃 clearly􀀃 defined.􀀃 􀀃A􀀃 clinical􀀃 instrument􀀃 ready􀀃 for􀀃 beta􀀃 testing􀀃 and􀀃 commercialization􀀃 should􀀃 be􀀃 completed􀀃 within􀀃 a􀀃 two􀍲year􀀃 time􀀃frame.􀀃􀀃 The􀀃 health􀀃 relatedness􀀃 of􀀃 the􀀃 project􀀃 is􀀃 a􀀃 novel􀀃 and􀀃 useful􀀃 clinical􀀃 instrument􀀃 for􀀃 diagnosis􀀃 and􀀃 treatment􀀃 of􀀃 a􀀃 major􀀃 challenge􀀃 in􀀃 limb􀀃 prosthetics:􀀃 limb􀀃 volume􀀃 fluctuation.􀀃 􀀃 This􀀃 instrument􀀃 could􀀃 be􀀃 extended􀀃 towards􀀃 the􀀃 implementation􀀃 and􀀃 evaluation􀀃 of􀀃 novel􀀃 volume􀀃 control􀀃 strategies􀀃 and􀀃 also􀀃 applied􀀃 to􀀃 other􀀃 areas􀀃 of􀀃 rehabilitation􀀃where􀀃management􀀃of􀀃interstitial􀀃fluid􀀃control􀀃is􀀃clinically􀀃relevant.􀀃􀀃