Ropa-oxygen monitor inoratidza chikamu cheropa rakatakurwa neokisijeni.Kunyanya zvakanyanya, inoyera kuti ndeipi muzana yehemoglobin, puroteni iri muropa inotakura okisijeni, inotakurwa.Zvinogamuchirwa zvakajairwa zviyero zvevarwere vasina pulmonary pathology kubva pa95 kusvika 99 muzana.Kune murwere anofema mukamuri mhepo iri padyo negungwa, fungidziro ye arterial poO2inogona kugadzirwa kubva muropa-oxygen monitor "saturation yeperipheral oxygen" (SpO2) kuverenga.
A normal pulse oximeter inoshandisa electronic processor uye peya yelight-emitting diodes (LEDs) madiki akatarisana nephotodiode kuburikidza nechikamu chinopenya chemuviri wemurwere, kazhinji kacho chigunwe kana nzeve.Imwe LED yakatsvuka, ine wavelength ye660 nm, uye imwe infrared ine wavelength ye940 nm.Kupfekwa kwechiedza pamasaisai aya kunosiyana zvakanyanya pakati peropa rakatakurwa neokisijeni neropa risina oxygen.Oxygenated hemoglobin inotora mwenje we infrared uye inobvumira mwenje mutsvuku kupfuura.Deoxygenated hemoglobin inobvumira kuti chiedza che infrared chipfuure uye chinotora chiedza chitsvuku.Iwo maLED anotevedzana kuburikidza nekutenderera kwawo kweimwe pa, ipapo imwe, yobva yadzima kanokwana makumi matatu pasekondi izvo zvinobvumira iyo photodiode kupindura kune tsvuku uye infrared mwenje zvakasiyana uye zvakare kugadzirisa kune ambient mwenje baseline.
Huwandu hwechiedza chinofambiswa (nemamwe mazwi, icho chisina kubatwa) chinoyerwa, uye masaini akapatsanurwa akajairwa anogadzirwa kune yega wavelength.Aya masaini anochinja-chinja nekufamba kwenguva nekuti huwandu hweropa retsinga riripo rinowedzera (chaizvoizvo pulses) nekurova kwemoyo wega wega.Nekubvisa chiedza chiduku chinopfuudzwa kubva pachiedza chinopfuudzwa muwavelength imwe neimwe, migumisiro yemamwe matukisi inogadziriswa, ichigadzira chiratidzo chinoramba chiripo che pulsatile arterial blood.Chiyero chechiyero chechiedza chitsvuku kusvika kuchiyero chechiedza che infrared chinobva chaverengwa ne processor. (iyo inomiririra reshiyo yeokisijeni hemoglobin kune deoxygenated hemoglobin), uye chiyero ichi chinozoshandurwa kuita SpO.2ne processor kuburikidza netafura yekutarisa yakavakirwa pamutemo weBeer-Lambert.Kupatsanurwa kwechiratidzo kunoshandawo zvimwe zvinangwa: plethysmograph waveform ("pleth wave") inomiririra iyo pulsatile chiratidzo chinowanzo kuratidzwa chiratidzo cheiyo pulses pamwe nemhando yechiratidzo, uye chiyero chenhamba pakati pe pulsatile uye baseline absorbance ("perfusion). index”) inogona kushandiswa kuongorora kunhuhwirira.
Nguva yekutumira: Chikunguru-01-2019