I-oximeter yewashi le-Narigmed ilungele ukugqokwa nokukala. Ikakhulukazi, ubuchwepheshe be-oksijeni yegazi emkhiqizweni bungasetshenziselwa izimo ezihlukahlukene kanye nabantu bazo zonke izinhlobo zesikhumba, futhi busetshenziswa odokotela ukukala umoya-mpilo wegazi, izinga lokushaya kwenhliziyo, izinga lokuphefumula kanye nenkomba ye-perfusion. Ilungiselelwe ngokukhethekile futhi yathuthukiswa ukuze isebenze ngokumelene nokunyakaza nokusebenza okuphansi kwe-perfusion. Isibonelo, ngaphansi kokunyakaza okungahleliwe noma okuvamile kwe-0-4Hz, i-0-3cm, ukunemba kwe-pulse oximetry (SpO2) yi-± 3%, futhi ukunemba kokulinganisa kwezinga lokushaya kwenhliziyo yi-± 4bpm. Uma inkomba ye-hypoperfusion inkulu noma ilingana no-0.025%, ukunemba kwe-pulse oximetry (SpO2) kungu-±2%, futhi ukunemba kokulinganisa izinga lokushaya kwenhliziyo ngu-±2bpm.