Ii-electrodes

Ijeli emanzi okanye Ncamathelisa nge-Electrolytes

Iimpawu ze-mechanical okanye ze-viscous ze-contact medium zibalulekile, kwaye kaninzi i-electrolyte igxininiswe yinto ye-gel okanye iqulethwe kwisipontshi okanye iimpahla ezithambileyo.Ii-electrode ze-Commercial electrocardiogram (ECG) zihlala zihanjiswa njengezixhobo ezifakwe ngaphambili zokusetyenziswa okukodwa, kwaye i-medium ingaba ne-preservatives ukwandisa ubomi bokugcina, okanye i-quartz particles ngeenjongo zokuqhawula esikhumbeni.

Ngokuqhelekileyo, ukuhamba kwe-ionic kwaye ngoko ke i-conductivity kwi-viscosity paste ephezulu iphantsi kunolwelo.I-electrolyte emanzi yoxinaniso oluphezulu (> 1%) ingena esikhumbeni ngokusebenzayo, kunye nexesha elihlala licatshulwa ngokuphindaphindiweyo ukuba libe lomyalelo we-10 min (Tregear, 1966; Almasi et al., 1970; McAdams et al., 1991b).Nangona kunjalo, eneneni inkqubo ayinayo i-exponential (njengoko iinkqubo zokusasazwa zingekho), kwaye inokuqhubeka iiyure kunye neentsuku (Grimnes, 1983a) (jonga uMfanekiso 4.20).Ukungena kunamandla okuphakamileyo koxinzelelo lwe-electrolyte, kodwa kunye nokucaphukisa ngakumbi ulusu.I-NaCl inyamezeleke ngcono ulusu lomntu ekugxininiseni okuphezulu kunezinye i-electrolyte ezininzi.Umzobo 7.5 ubonisa ukungena kwe-electrolyte eluswini kwiiyure ezi-4 zokuqala emva kokuqalisa kwe-electrode eluswini.I-impedance kwi-1 Hz ilawulwa ngumxholo we-stratum corneum electrolyte, kunye negalelo elingaphantsi kwe-1% ukusuka kwi-electrode's small-signal polarizing impedance.Ukuba i-sweat ducts izaliswe okanye isandul 'ukuzaliswa, ukuqhutyelwa kweemibhobho kukhupha i-impedance ephezulu ye-dry stratum corneum.

I-conductivity σ yezinye iikhrimu zoqhagamshelwano ezisoloko zisetyenziswa rhoqo zezi: 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 , kunye ne-NASA electrode cream 1.2 S/m.I-NASA Flight paste iqulethe i-9% ye-NaCl, i-3% ye-potassium chloride (KCl), kunye ne-3% ye-calcium chloride (CaCl), iyonke i-15% (ngobunzima) ye-electrolytes.Intlama etyebileyo ye-electroencephalogram (EEG) inokuqulatha ukuya kuthi ga kwi-45% KCl.

Ngokuthelekisa, i-0.9% ye-NaCl (ngobunzima) isisombululo se-saline ye-physiological ine-conductivity ye-1.4 S / m;iijeli ezininzi ke ngoko eyomeleleyo electrolytes.Amanzi olwandle aneetyuwa ezimalunga ne-3.5%, kwaye uLwandle oluFileyo luqulathe > 25% yeetyuwa ezinokwakheka kwe-50% MgCl2, 30% NaCl, 14% CaCl2, kunye ne-6% KCl.Oko kwahluke kakhulu kwityuwa yamanzi olwandle (NaCl 97% yesiqulatho setyuwa iyonke).ULwandle Olufileyo lubizwa ngokuba “lufile” ngenxa yokuba ityuwa yalo eninzi ibangela ukuba izityalo neentlanzi zingahlali apho.

Amava abonise ukuba i-gel yomelele, ngokukhawuleza ukungena kwesikhumba kunye ne-sweat ducts.Nangona kunjalo, ukusabela kolusu njengokukrala kolusu kunye nokubabomvu kwakhona kuyakhawuleza.Ukuhlolwa kwe-ECG ngokukhawuleza, iigels ezinamandla zinokusetyenziswa;ukubeka iliso ngexesha leentsuku, i-gel yoqhagamshelwano kufuneka ibe buthathaka.Uninzi lwabantu luyazixabisa iiyure zokuhlamba emanzini olwandle, ngoko ityuwa ye-3.5% kufuneka kwiimeko ezininzi yamkeleke.

Ngomsebenzi we-electrodermal (Isahluko 10.3), i-gel emanzi yokudibanisa kufuneka ibe netyuwa ephantsi ukuqinisekisa ukuchithwa ngokukhawuleza kwee-ducts.