Final answer:
The false statement about oximetry is that normal oxygen saturation is 85% to 90%, when in reality it ranges from 95-100 percent, indicating the presence of hypoxemia when lower.
Step-by-step explanation:
The statement which is FALSE about oximetry is: normal oxygen saturation is 85% to 90%. In fact, normal pulse oximeter readings range from 95-100 percent. Lower percentages reflect hypoxemia, or low blood oxygen.
Overall, oximetry is an essential method for patient monitoring and measures the concentration of oxygen in the blood using a device called a pulse oximeter. A pulse oximeter works by passing a beam of red and infrared light through a capillary bed (typically on the fingertip), with a photodetector measuring the amount of light that is absorbed by the blood's hemoglobin. This allows healthcare providers to monitor oxygen levels and ensure that patients are appropriately oxygenated.