I-SPO2ingahlukaniswa ibe izingxenye ezilandelayo: “S” isho ukugcwala kwamanzi, “P” isho ukushaya kwenhliziyo, kanti “O2” isho umoya-mpilo.Lesi sifinyezo sikala inani lomoya-mpilo oxhunywe kumaseli e-hemoglobin ohlelweni lokujikeleza kwegazi.Ngamafuphi, leli nani libhekisela enanini lomoya-mpilo othwalwa amangqamuzana abomvu egazi.Lesi silinganiso sikhombisa ukusebenza kahle kokuphefumula kwesiguli kanye nokusebenza kahle kokugeleza kwegazi kuwo wonke umzimba.Ukugcwala komoyampilo kusetshenziswa njengephesenti ukukhombisa umphumela walesi silinganiso.Isilinganiso sokufunda komuntu omdala ophile kahle singama-96%.
Ukugcwala komoyampilo egazini kukalwa kusetshenziswa i-pulse oximeter, ehlanganisa imonitha ekhompuyutha kanye namacuffs eminwe.Ombhede weminwe ungaboshelwa eminweni, ezinzwaneni, emakhaleni noma ezindlebeni zesiguli.Umqaphi ube esebonisa ukufundwa okubonisa inani lomoya-mpilo egazini lesiguli.Lokhu kwenziwa kusetshenziswa amagagasi ahumusekayo abonakalayo kanye nezimpawu ezizwakalayo, ezihambisana nokushaya kwenhliziyo kwesiguli.Njengoba ukugcwala komoyampilo egazini kwehla, amandla esignali ayancipha.Imonitha iphinde ibonise izinga lokushaya kwenhliziyo futhi ine-alamu, lapho ukushaya kwenhliziyo kushesha kakhulu/kunensa futhi ukugcwaliswa kwesikhala kuphezulu kakhulu/kuphansi, kukhishwa isignali ye-alamu.
Iidivayisi yokugcwalisa umoya-mpilo wegazikulinganisa igazi eline-oxygen kanye negazi le-hypoxic.Amafrikhwensi amabili ahlukene asetshenziswa ukukala lezi zinhlobo ezimbili zegazi: amaza abomvu nawe-infrared.Le ndlela ibizwa ngokuthi i-spectrophotometry.Ifrikhwensi ebomvu isetshenziselwa ukukala i-hemoglobin ephelelwe amanzi, futhi i-infrared frequency isetshenziselwa ukukala igazi eline-oxygen.Uma ibonisa ukumuncwa okukhulu kakhulu kubhendi ye-infrared, lokhu kubonisa ukugcwaliswa kwesikhala okuphezulu.Ngokuphambene, uma ukumuncwa okuphezulu kuboniswa ebhendini ebomvu, lokhu kubonisa ukugcwaliswa kwesikhala okuphansi.
Ukukhanya kudluliselwa ngomunwe, futhi imisebe yokudluliselwa iqashwe owamukelayo.Okunye kwalokhu kukhanya kudonswa izicubu negazi, futhi lapho imithambo yegazi igcwele igazi, ukumuncwa kuyanda.Ngokufanayo, lapho imithambo ingenalutho, izinga lokumuncwa liyehla.Ngoba kulolu hlelo lokusebenza, okuwukuphela kokuguquguquka ukugeleza okuguquguqukayo, ingxenye emile (okungukuthi isikhumba nezicubu) ingasuswa ekubalweni.Ngakho-ke, isebenzisa amaza okukhanya amabili aqoqwe esilinganisweni, i-pulse oximeter ibala ukugcwala kwe-hemoglobin ene-oxygen.
97% saturation = 97% ukucindezela ingxenye ye-oxygen (evamile)
90% saturation = 60% oxygen partial pressure (iyingozi)
80% saturation = 45% blood oxygen partial pressure (hypoxia enzima)
Isikhathi sokuthumela: Nov-21-2020