Ama-Electrodes

Ijeli Emanzi Noma Namathisela Ngama-Electrolyte

Izakhiwo zemishini noma ze-viscous ze-contact medium zibalulekile, futhi ngokuvamile i-electrolyte iqiniswa into yejeli noma iqukethe isipontshi noma izingubo ezithambile.Ama-electrode e-Commercial electrocardiogram (ECG) avame ukulethwa njengamadivayisi afakwe ngaphambili ukuze asetshenziswe kanye, futhi okuphakathi kungase kuqukathe izinto ezilondolozayo zokwandisa ukuphila kwesitoreji, noma izinhlayiya ze-quartz ngezinjongo zokuhuha esikhumbeni.

Ngokuvamile, ukuhamba kwe-ionic ngakho-ke ukuqhutshwa kokunamathiselwe kwe-viscosity ephezulu kuphansi kune-liquid.Ama-electrolyte amanzi okugxila okuphezulu (>1%) angena esikhumbeni ngenkuthalo, ngesikhathi esingaguquki esivame ukucashunwa njenge-oda le-10 min (Tregear, 1966; Almasi et al., 1970; McAdams et al., 1991b).Kodwa-ke, empeleni inqubo ayiyona i-exponential (njengoba izinqubo zokusabalalisa zingekho), futhi ingase iqhubeke amahora nezinsuku (Grimnes, 1983a) (bona Umfanekiso 4.20).Ukungena kunamandla lapho kukhuphuka ukuhlushwa kwe-electrolyte, kodwa futhi isikhumba esiningi siyacasula.I-NaCl ibekezelelwa kangcono isikhumba somuntu ekugxilweni okuphezulu kunamanye ama-electrolyte amaningi.Umfanekiso 7.5 ubonisa ukungena kwe-electrolyte esikhumbeni emahoreni ama-4 okuqala ngemva kokungena kwe-electrode esikhumbeni.Ukuphazamiseka kokuthi 1 Hz kubuswa okuqukethwe kwe-electrolyte ye-stratum corneum, kunomnikelo ongaphansi kuka-1% ovela ku-electrode ngokwayo enesignali encane evimbela ukugqama.Uma ama-sweat ducts agcwele noma asanda kugcwaliswa, ukuqhutshwa kwemigudu kuvimbela ukuvinjelwa okuphezulu kwe-stratum corneum eyomile.

I-conductivity σ yamanye amakhilimu/ama-pasta ajwayele ukusetshenziswa yilawa: Redux creme (Hewlett Packard) 10.6 S/m, Electrode creme (Grass) 3.3 S/m, Beckman-Offner paste 17 S/m, NASA Flight paste 7.7 S/m , kanye ne-NASA electrode cream 1.2 S/m.I-NASA Flight paste iqukethe u-9% we-NaCl, u-3% we-potassium chloride (KCl), kanye no-3% we-calcium chloride (CaCl), esewonke u-15% (ngesisindo) wama-electrolyte.Okunamathiselwe kwe-electroencephalogram (EEG) okujiyile kungase kuqukathe okungafika ku-45% KCl.

Uma kuqhathaniswa, i-0.9% ye-NaCl (ngesisindo) isisombululo se-saline ye-physiological sine-conductivity ye-1.4 S / m;Ngakho-ke ama-gel amaningi angama-electrolyte aqinile.Amanzi olwandle aqukethe cishe usawoti ongu-3.5%, kanti uLwandle Olufile luqukethe > 25% kasawoti onokwakheka kuka-50% MgCl2, 30% NaCl, 14% CaCl2, kanye no-6% KCl.Lokho kwehluke kakhulu kusawoti wamanzi olwandle (NaCl 97% wokuqukethwe kukasawoti okuphelele).ULwandle Olufile lubizwa ngokuthi “lufile” ngoba usawoti walo omningi uvimbela izitshalo nezinhlanzi ukuba zingahlali lapho.

Okuhlangenwe nakho kuye kwabonisa ukuthi uma ijeli linamandla, lingena ngokushesha esikhumbeni kanye namapayipi okujuluka.Nokho, ukusabela kwesikhumba njengokucasuka kwesikhumba nokubabomvu nakho kuyashesha.Ukuhlolwa kwe-ECG okusheshayo, ama-gel anamandla angasetshenziswa;ngokuqapha phakathi nezinsuku, ijeli yokuxhumana kufanele ibe buthakathaka.Abantu abaningi bayawazisa amahora okugeza emanzini olwandle, ngakho usawoti ongu-3.5% kufanele ezikhathini eziningi wamukeleke.

Ngomsebenzi we-electrodermal (Isahluko 10.3), ijeli emanzi yokuxhumana kufanele ibe nosawoti ophansi ukuze kuqinisekiswe ukuphuma ngokushesha kwamapayipi.