1. Umsebenzi nomgomo
Ngokwezici ze-spectral ze-oxyhemoglobin (HbO2) kanye ne-hemoglobin (Hb) encishisiwe ekukhanyeni okubomvu nasezifundeni zokukhanya kwe-infrared, kungabonakala ukuthi ukumuncwa kwe-HbO2 ne-Hb endaweni yokukhanya okubomvu (600-700nm) kuhluke kakhulu, kanye nokumunca ukukhanya nokuhlakazeka kwegazi okuncane Izinga lincike kakhulu ekugcwaleni komoyampilo egazini;ngenkathi isendaweni ye-infrared spectral (800～1000nm), ukumuncwa kuhluke kakhulu.Izinga lokumunca ukukhanya nokuhlakazeka kwegazi okuncane kuhlobene kakhulu nokuqukethwe kwe-hemoglobin.Ngakho-ke, okuqukethwe kwe-HbO2 ne-Hb kuhlukile ekumunceni.I-spectrum nayo ihlukile, ngakho-ke igazi ku-catheter yegazi ye-oximeter lingabonisa ngokunembile ukugcwala komoyampilo wegazi ngokuya ngokuqukethwe kwe-HbO2 ne-Hb, kungakhathaliseki ukuthi kuyi-arterial blood noma i-venous saturation.Isilinganiso sokubukeka kwegazi okuzungeze u-660nm kanye no-900nm (ρ660/900) sibonisa kakhulu izinguquko ekugcwaleni komoyampilo wegazi, futhi amamitha avamile omtholampilo wokugcwala komoyampilo egazini (njengamamitha e-Baxter saturation) nawo asebenzisa lesi silinganiso njengento eguquguqukayo.Endleleni yokudlulisa ukukhanya, ngaphezu kwe-arterial hemoglobin idonsa ukukhanya, ezinye izicubu (njengesikhumba, izicubu ezithambile, igazi le-venous kanye negazi le-capillary) nazo zingadonsa ukukhanya.Kodwa lapho ukukhanya kwesigameko kudlula emunweni noma endlebeni, ukukhanya kungamuncwa igazi elishaya ngamandla nezinye izicubu ngesikhathi esisodwa, kodwa ukukhanya okumuncwa kokubili kuhlukile.Amandla okukhanya (AC) amuncwa igazi le-arterial pulsatile ashintsha ngokushintsha kwegagasi lomfutho we-arterial Kanye noshintsho.Amandla okukhanya (DC) amuncwa ezinye izicubu akushintshi ngokushaya kwenhliziyo nesikhathi.Kusukela kulokhu, isilinganiso sokumunca ukukhanya esingu-R kumaza wamaza amabili singabalwa.R=(AC660/DC660)/(AC940/DC940).I-R ne-SPO2 ahlobene kabi.Ngokwevelu engu-R, inani elihambisanayo le-SPO2 lingatholwa ejikeni elijwayelekile.
2. Izici nezinzuzo ze-probe
Ithuluzi le-SPO2 lihlanganisa izingxenye ezintathu eziyinhloko: i-probe, imojula yokusebenza kanye nengxenye yokubonisa.Kwabaqaphi abaningi emakethe, ubuchwepheshe bokubona i-SPO2 sebuvele buvuthwe kakhulu.Ukunemba kwevelu ye-SPO2 etholwe yisiqapha kuhlobene kakhulu nophenyo.Kunezici eziningi ezithinta ukutholwa kophenyo.Idivayisi yokuthola, izintambo zezokwelapha, nobuchwepheshe bokuxhuma obusetshenziswa uphenyo kuzothinta umphumela wokutholwa.
A·Idivayisi yokuthola
Ama-diode akhipha ukukhanya nama-photodetectors athola amasignali yizingxenye ezibalulekile ze-probe.Kuphinde kube ukhiye wokunquma ukunemba kwevelu yokuthola.Ngokombono, ubude begagasi bokukhanya okubomvu bungu-660nm, futhi inani elitholwa lapho ukukhanya kwe-infrared kungu-940nm lilungile.Nokho, ngenxa yobunkimbinkimbi benqubo yokukhiqiza idivayisi, ubude beza beza lokukhanya okubomvu nokukhanya kwe-infrared okukhiqizwayo buhlala buchezukile.Ubukhulu bokuchezuka kobude begagasi lokukhanya buzothinta inani elitholiwe.Ngakho-ke, inqubo yokukhiqiza ama-diode akhipha ukukhanya kanye namadivayisi okubona i-photoelectric ibaluleke kakhulu.I-R-RUI isebenzisa imishini yokuhlola ye-FLUKE, enezinzuzo kokubili ngokunemba nokuthembeka.
B · Intambo Yezokwelapha
Ngaphezu kokusebenzisa izinto ezingenisiwe (ezinokwethenjelwa ngokwamandla anwebekayo aphezulu kanye nokumelana nokugqwala), iphinde yakhelwe ngokuvikela okukabili, okungacindezela ukuphazamiseka komsindo futhi kugcine isignali iqinile uma iqhathaniswa nesendlalelo esisodwa noma ukungabikho kwesivikelo.
C · Umqamelo
I-probe ekhiqizwa yi-R-RUI isebenzisa i-soft pad eklanyelwe ngokukhethekile (i-finger pad), ekhululekile, ethembekile, futhi engeyona i-allergenic ekuthintaneni nesikhumba, futhi ingasetshenziswa ezigulini ezinobunjwa obuhlukene.Futhi isebenzisa idizayini egoqwe ngokugcwele ukugwema ukuphazamiseka okubangelwa ukuvuza kokukhanya ngenxa yokunyakaza kweminwe.
D isiqeshana somunwe
Isiqeshana somunwe somzimba senziwe ngezinto ze-ABS ezingashi nokumelana nomlilo, eziqinile futhi akulula ukuzilimaza.Ipuleti elivikela ukukhanya liphinde laklanywa kusiqeshana somunwe, esingavikela kangcono umthombo wokukhanya okuzungezile.
E·Intwasahlobo
Ngokuvamile, esinye sezizathu eziyinhloko zokulimala kwe-SPO2 ukuthi intwasahlobo ikhululekile, futhi ukunwebeka akwanele ukwenza amandla okubamba anganele.I-R-RUI isebenzisa i-high-tension electroplated carbon steel spring, ethembekile futhi ehlala isikhathi eside.
F itheminali
Ukuze kuqinisekiswe ukuxhumeka okuthembekile nokuqina kwe-probe, ukuncishiswa kwenqubo yokudlulisa isignali kucatshangelwa kutheminali yokuxhuma nokuqapha, futhi kwamukelwa inqubo ekhethekile yokugcina igolide.
G·Inqubo yokuxhuma
Inqubo yokuxhuma ye-probe nayo ibaluleke kakhulu emiphumeleni yokuhlolwa.Ukuma kwamaphedi athambile kuye kwalinganiswa futhi kwahlolwa ukuze kuqinisekiswe izindawo ezifanele zesidlulisi kanye nomamukeli wedivayisi yokuhlola.
H · Mayelana nokunemba
Qinisekisa ukuthi uma inani le-SPO2 lingu-70%~~100%, iphutha alidluli ukuhlanganisa noma ukususa u-2%, futhi ukunemba kuphezulu, ukuze umphumela wokutholwa uthembeke kakhulu.
Isikhathi sokuthumela: Jun-24-2021