Electrodes

Wet Gel ma ọ bụ Tapawa na Electrolytes

Ihe eji arụ ọrụ ma ọ bụ viscous nke kọntaktị kọntaktị dị mkpa, na mgbe mgbe, a na-eme ka electrolyte dị arọ site na ihe gel ma ọ bụ dị na sponge ma ọ bụ uwe dị nro.A na-ebunyekarị elektrọd electrocardiogram azụmahịa (ECG) dị ka ngwaọrụ pregelled maka otu ojiji, na usoro nwere ike ịnwe ihe nchekwa iji bulie ndụ nchekwa, ma ọ bụ akụkụ quartz maka ebumnuche abrading na akpụkpọ ahụ.

N'ozuzu, ionic ngagharị na ya mere conductivity na a elu viscosity mado dị ala karịa na a mmiri mmiri.Wet electrolytes nke nnukwu itinye uche (> 1%) na-abanye n'ime akpụkpọ ahụ nke ọma, na-enwe oge na-emekarị ka ọ bụrụ usoro nke 10 min (Tregear, 1966; Almasi et al., 1970; McAdams et al., 1991b).Otú ọ dị, n'ezie usoro ahụ abụghị ihe mgbagwoju anya (dịka usoro mgbasa ozi na-abụghị), ma nwee ike ịga n'ihu ruo awa na ụbọchị (Grimnes, 1983a) (lee foto 4.20).Ntinye ahụ na-esiwanye ike ka ọnụọgụ electrolyte dị elu, mana ọ na-agbakasịkwa akpụkpọ ahụ.NaCl na-anabata nke ọma site na akpụkpọ mmadụ n'ogo dị elu karịa ọtụtụ electrolytes ndị ọzọ.Onyonyo 7.5 na-egosi ntinye electrolyte n'ime akpụkpọ ahụ n'ime awa 4 mbụ mgbe electrode malitere na akpụkpọ ahụ.Ọdịnaya stratum corneum electrolyte na-achịkwa impedance na 1 Hz, yana ntinye ihe na-erughị 1% site na nhụsianya polarizing nke pere mpe nke electrode.Ọ bụrụ na ọsụsọ na-ejupụta ma ọ bụ na-ejupụta n'oge na-adịbeghị anya, nhazi nke ducts na-egbochi nnukwu mgbochi nke stratum corneum akọrọ.

The conductivity σ nke ụfọdụ na-ejikarị kọntaktị creams/pastas bụ: Redux creme (Hewlett Packard) 10.6 S/m, Electrode creme (Ahịhịa) 3.3 S/m, Beckman-Offner mado 17 S/m, NASA Flight mado 7.7 S/m , na NASA electrode ude 1.2 S/m.NASA ụgbọ elu tapawa nwere 9% NaCl, 3% potassium chloride (KCl), na 3% calcium chloride (CaCl), na mkpokọta 15% (site arọ) nke electrolytes.Tapawa electroencephalogram (EEG) siri ike nwere ike ịnwe ihe ruru 45% KCl.

N'iji ya tụnyere, 0.9% NaCl (n'ịdị arọ) ngwọta saline physiological nwere nhazi nke 1.4 S / m;Ya mere ọtụtụ gels bụ ike electrolytes.Mmiri mmiri nwere ihe dị ka 3.5% nnu, na Oké Osimiri Nwụrụ Anwụ nwere> 25% nnu nwere ihe mejupụtara 50% MgCl2, 30% NaCl, 14% CaCl2, na 6% KCl.Nke ahụ dị nnọọ iche na nnu mmiri mmiri (NaCl 97% nke ọdịnaya nnu zuru ezu).A na-akpọ Oké Osimiri Nwụrụ Anwụ “nwụrụ anwụ” n’ihi na nnu ya dị elu na-egbochi osisi na azụ̀ ibi n’ebe ahụ.

Ahụmahụ egosila na ka gel na-esiwanye ike, ngwa ngwa ịbanye n'ime akpụkpọ ahụ na ọsụsọ.Otú ọ dị, mmeghachi omume akpụkpọ anụ dị ka mgbakasị ahụ na reddening na-adịkwa ngwa ngwa.Maka nyocha ngwa ngwa ECG, enwere ike iji gels siri ike mee ihe;maka nlekota n'ime ụbọchị, kọntaktị gel ga-adị ike.Ọtụtụ ndị mmadụ na-enwe ekele maka awa ịsa ahụ na mmiri mmiri, yabụ ọdịnaya nnu nke 3.5% kwesịrị ịnakwere n'ọtụtụ ọnọdụ.

Maka ọrụ electrodermal (Isi nke 10.3), onye na-akpọtụrụ mmiri gel ga-enwerịrị ọdịnaya nnu dị ala iji mesie ike ịpụpụ ngwa ngwa nke ducts.