Pulse oximetry

Pulse oximetry ndi njira yosasokoneza yowunika kuchuluka kwa okosijeni wamunthu (SO2).Ngakhale kuwerenga kwake kwa mpweya wa okosijeni (SpO2) sikufanana nthawi zonse ndi kuwerengera kofunikira kwambiri kwa mpweya wabwino wa okosijeni (SaO2) kuchokera ku kusanthula kwa mpweya wamagazi a magazi, zonsezi zimagwirizanitsidwa bwino kuti njira yotetezeka, yabwino, yosasokoneza, yotsika mtengo ya pulse oximetry. Ndikofunikira poyezera kuchuluka kwa okosijeni pakugwiritsa ntchito kuchipatala.

Munjira yake yodziwika bwino (yopatsirana) yogwiritsira ntchito, chipangizo cha sensor chimayikidwa pagawo lopyapyala la thupi la wodwalayo, nthawi zambiri nsonga ya chala kapena khutu, kapena ngati khanda, kudutsa phazi.Chipangizocho chimadutsa mafunde awiri a kuwala kudutsa mbali ya thupi kupita ku photodetector.Imayesa kusintha kwa kuyamwa pamtundu uliwonse wa mafunde, kulola kuti izindikire kuyamwa chifukwa cha kugunda kwa magazi okha, osaphatikizapo magazi a venous, khungu, fupa, minofu, mafuta, ndi (nthawi zambiri) kupukuta misomali.[1]

Reflectance pulse oximetry ndi njira yocheperako kuposa transmissive pulse oximetery.Njirayi sikutanthauza gawo lochepa thupi la munthu ndipo ndiloyenera kugwiritsidwa ntchito ponseponse monga mapazi, mphumi, ndi chifuwa, komanso ili ndi zofooka zina.Vasodilation ndi kuphatikiza kwa venous magazi m'mutu chifukwa cha kuwonongeka kwa venous kubwerera kumtima kungayambitse kuphatikizika kwa mitsempha yamagazi ndi venous pamphumi ndikupangitsa zotsatira zabodza za SpO2.Zinthu zotere zimachitika mukamachitidwa opaleshoni yokhala ndi endotracheal intubation komanso mpweya wabwino wamakina kapena odwala omwe ali ndi Trendelenburg.