The most important approach for the nurse to use when applying a nasal cannula is TO MEASURE OXYGEN SATURATION.
Measuring oxygen saturation gives data about a person's overall oxygenation. Oxygen saturation is measured with the help of a Pulse Oximeter. It is a small device that is clipped to the finger to measure oxygenation.
Oxygen saturation refers to the fraction of oxygen-saturated hemoglobin as compared to the total hemoglobin in the body.
D:
a,b,c are inherently bad or simply not helpful
Mucous membrane, membrane lining body cavities and canals that lead to the outside, chiefly the respiratory, digestive, and urogenital tracts. Mucous membranes line many tracts and structures of the body, including the mouth, nose, eyelids, trachea (windpipe) and lungs, stomach and intestines, and the ureters, urethra, and urinary bladder.