I-Endotracheal Tube ene-lumen yokuphuma ikhonjiswe ekulawuleni indlela yokuphefumula ngokufaka ngomlomo/emakhaleni kuqhoqhoqho, kanye nokuphuma noma ukugeleza kwamanzi kwesikhala esingaphansi kwe-subglottic.
Umgudu wokuphefumula uyindlela yokuphefumula yomuntu embozwe ulwelwesi lwamafinyila, kanye nesango lomoya ongaphandle ukuze ungene futhi uphume emzimbeni womuntu.Ifihla amafinyila ukuze amswakama futhi ashise umoya ovela ezweni elingaphandle.