ECG chiratidzo chekugadzirisa

A Electrocardiogram (ECG) inoshandiswa kutora kuratidzwa kwechimiro chemwoyo pane imwe nguva. Iyo yakabatana neganda kuburikidza neyemagetsi ekunze uye yakashandurwa kuita masaini yemagetsi ekuunganidza. Imwe neimwe sero meter yakaumbwa kunze kwemoyo ine muripo wakabatana, ndeipi depolarizes panguva yega yega yemoyo. Iyo inoratidzika paganda muchimiro chemasaini madiki emagetsi, izvo zvinogona kuwanikwa uye zvakakudzwa neElectrocardiogram.

Pakutanga kwa1900, Willem Einthoven akagadzira yekutanga yeElectrocardiogram. Iyo system ndeye bulky uye inoda kuti vanhu vazhinji vazvirambe. Murwere anodiwa kuisa maoko nemakumbo mune yakakura elektrode ine elektrolyte. Mishandiso yanhasi yeECG yekuongorora inoongorora uye nyore kutakura, kuti varwere vanogona zvakare kutakura kana vachifamba. Imwe gumi nemaviri-inotungamira ecg yekushandisa kumba inogona kutakurwa muhomwe.

ECG Basics:

Izwi rekuti "kutungamira" paElectrocardiogram mune ino chinyorwa chinoreva musiyano wependi pakati pemamwe ma electrodes maviri, iwo musiyano wakanyorwa nemudziyo. Semuenzaniso, "Kutungamira_I" ndiyo voltage pakati kuruboshwe uye kurudyi ruoko magetsi. Zvese zvinotungamira_i uye zvinotungamira_ii zvinoreva kuumbwa kunotungamira. V1-V6 inoreva pachipfuva inotungamira. ECG Tracking V1 ndiyo mutsauko pakati peVC1 Voltage (iyo voltage yeChipfuva Electrode), uye avhareji voltage ye #tress_i, inotungamira_ii, uye inotungamira_iii. A standard 12-kutungamira ecg system inosanganisira masere echokwadi tsika uye mana anotorwa tsika. Tafura 1 inopa tsananguro pfupi yeiyo dzakasiyana-siyana kutungamira voltages (chaiye uye inotorwa).

Tungamira zita rekuverenga zvinyorwa

Uku kutungamira chaiko, kuratidzwa muECG trace.

Tafura 1: Tungamira mazita uye ECG kurekodha nzvimbo.

A akajairwa ECG waveform inoratidzwa mumufananidzo 1. Iyo x axis inomiririra nguva yakatarwa. Pano, yega yega grid (5 mm) inoenderana ne20 ms. Iyo y axis inoratidza iyo yekubvumira chiratidzo chakabatwa. Chikamu chimwe nechimwe (5 mm) pane y axis inoenderana ne 0.5 mv. (10mm / mv uye 25mm / s)

Mufananidzo 1: Chaizvoizvo ECG waveform.

ECG maficha:

Nhanho yekutanga mukugadzirwa kweiyo ECG system inosanganisira kunzwisisa mhando dzezvikwangwani dzinoda kuwanikwa. Iyo yeElectrocardiogram Signal chiratidzo inosanganisira yakaderera-Amplitude voltage iripo mune yakakwirira bias uye ruzha. Mufananidzo 2 unoratidza hunhu hwe ecg chiratidzo. Iko kune yakakwira yekubvisa muhurongwa nekuda kwehafu-cell-voltage inogadzirwa nema electrodes. AG / AGCL (sirivha-sirivha chloride) ndiyo yakajairika electrode mune electrocardiogram system, uye yayo yepamusoro yekunyora voltage ndeye +/- 300mv. Iyo chaiyo inotarisirwa chiratidzo ndeye +/- 0.5mv Superimposed pane iyo electrode yekubvisa. Uye zvakare, iyo system ichavharawo kumusoro iyo 50 / 60hz ruzha kubva kune iyo simba mutsara kuti ugadzire yakajairika modhi chiratidzo. Iyo yekuvhara yemugetsi mutsara ruzha runogona kunge rwakakura kwazvo uye zvinoda kushandurwa.

Mufananidzo 2: Hunhu hweECG chiratidzo kuti uwaniswe.

ECG kuwana

Analog Front-End Process chikamu chakakosha cheECG system nekuti inoda kusiyanisa pakati penziyo uye chiratidzo chaunoda (iyo amplitude idiki). Iyo Analog Front-End Processing Circuit inosanganisira chiyero champlifier kuti uderedze chiratidzo mune zvakajairika maitiro. Iyo kuyerwa Amplifier inoshanda ku +/- 5V uye inowanzoshandiswa kuwedzera iyo yekuisa voltage range. Iyi kuyerwa amplifier inofanirwa kuve neyakajeka yekuisa kusakwana nekuti kusakundikana kweganda kunogona kuve kwakakura kwazvo. A OP APP inodiwa kune chiratidzo chekugadzirisa kweiyo electrocardiogram kifaa. Chikwangwani chechiratidzo cheECG Action System inosanganisira kuyerwa amplifiers, mafirita (ayo anogona kuitwa neOp amps) uye adcs.