PULSE oximetry mwa theoretically imatha kuwerengera kuchuluka kwa okosijeni wa hemoglobini kuchokera ku chiŵerengero cha pulsatile kupita ku kuwala kofiira komwe kumagawidwa ndi chiŵerengero chomwecho cha kuwala kwa infrared transilluminating chala, khutu, kapena minofu ina.Machulukidwe omwe amachokera ayenera kukhala osadalira mtundu wa khungu, ndi zina zambiri, monga kuchuluka kwa hemoglobin, kupukuta misomali, dothi, ndi jaundice.Maphunziro angapo akuluakulu olamuliridwa poyerekeza odwala akuda ndi oyera (ophunzira 380) 1,2 adanenanso kuti palibe cholakwika chilichonse chokhudzana ndi mtundu wa pigment mu ma pulse oximeters pakukhudzika kwabwinobwino.
Komabe, Severinghaus ndi Kelleher3 adawunikiranso deta kuchokera kwa ofufuza angapo omwe adanenapo zolakwika zosawerengeka (+ 3 mpaka + 5%) mwa odwala akuda.4-7 Chitsanzo cha zolakwika chifukwa cha mitundu yosiyanasiyana ya pigment chinawunikiridwa ndi Ralston.ndi al.8 Kotindi al.9 inanena kuti kupukutira kwa misomali ndi inki pakhungu kungayambitse zolakwika, zomwe zatsimikiziridwa mosadziwika bwino ndi ena kuchokera ku inki yosindikizira zala, 10 henna, 11 ndi meconium.12 Utoto wolowetsedwa kudzera m'mitsempha umayambitsa zolakwika kwakanthawi.13 Leendi al.14 idapeza kuchulukirachulukira kwa machulukitsidwe, makamaka pakuchulukira kochepa kwa odwala okhala ndi pigmented (Indian, Malayvs.Chitchaina).The Technology Subcommittee of the Working Group on Critical Care, Ontario Ministry of Health, 15 inanena zolakwa zosavomerezeka mu pulse oximetry pa machulukitsidwe otsika m'mitu ya pigmented.Zeballos ndi Weisman16 anayerekezera kulondola kwa Hewlett-Packard (Sunnyvale, CA) oximeter ya makutu ndi Biox II pulse oximeter (Ohmeda, Andover, MA) mu 33 anyamata akuda amasewera olimbitsa thupi pazitali zitatu zosiyana.Pamtunda wa 4,000 m, kumene mpweya wa okosijeni (Sao2) unachokera ku 75 mpaka 84%, Hewlett-Packard inachepetsa Sao2by 4.8 ± 1.6%, pamene Biox inaposa Sao2by 9.8 ± 1.8% (n = 22).Zinanenedwa kuti zolakwa zimenezi, zomwe zinanenedwa kale mwa azungu, zonse zinali mokokomeza mwa akuda.
M'zaka zathu zambiri zoyesa kulondola kwa pulse oximeter pa kuchuluka kwa okosijeni otsika mpaka 50%, nthawi zina tawona kukondera kwakukulu, makamaka pamilingo yotsika kwambiri, mwa zina koma osati m'maphunziro ena ozama kwambiri.Kafukufukuyu adapangidwa makamaka kuti awone ngati zolakwika pa Sao2correlate yotsika ndi khungu.
Ma pulse oximeter onse omwe amagulitsidwa ku United States amafunikira ndi US Food and Drug Administration kuti ayesedwe ndikutsimikiziridwa kuti ndi olondola osakwana ± 3% muzu wotanthauza kulakwitsa kwakukulu pa Sao2values pakati pa 70 ndi 100%.Mayesero ochuluka a ma calibration ndi kutsimikizira achitika mwa anthu odzipereka omwe ali ndi khungu lowala.
Bungwe la Food and Drug Administration posachedwapa lati maphunziro olondola a pulse oximeter omwe aperekedwa kuti avomereze chipangizo cha Food and Drug Administration akuphatikizapo anthu omwe ali ndi maonekedwe osiyanasiyana a khungu, ngakhale kuti palibe chofunikira chochuluka chomwe chagawidwa.Sitikudziwa chilichonse chomwe chimathandizira izi.
Ngati pali kukondera kwakukulu komanso kobwerezabwereza pazakudya zotsika m'maphunziro a khungu lakuda, kuphatikiza kwa anthu akhungu lakuda kumawonjezera gulu loyesera zolakwa zapakati, mwina zokwanira kupangitsa kukanidwa ndi Food and Drug Administration.Ngati kukondera komwe kungathe kubwezeredwa kumapezeka pakutsika kochepa kwa anthu akhungu lakuda mu ma pulse oximeters onse, zilembo zochenjeza ziyenera kuperekedwa kwa ogwiritsa ntchito, mwina ndi zifukwa zowongolera.
Nthawi yotumiza: Jan-07-2019