How is oxygen measured in pulse oximetry?

Answer 1

Medically, measuring Oxygen Saturation is termed Oximetry due to the use of a pulse oximeter which uses infra red light to and spectrophotometry based principles to estimate the level of O2 bound to haemoglobin in the blood when sat on a peripheral extremity such as the toe, finger or nose.

Answer 2

Oxygen saturation, the percentage of hemoglobin oxygen binding sites that are occupied by an oxygen molecule, is usually measure with a pulse oximeter (also spelled oxymeter). This is a device that measures the absorption of specific wave lengths or red and ultraviolet light and compares their ratios to determine the saturation.

Answer 3

There are two main ways we measure blood oxygenation. The invasive way is by drawing an Arterial Blood Gas. The other method, which is non-invasive is the Oxygen Saturation or O2 Sat method. This is done with a clip on the finger or ear, or even a probe on the head.

Answer 4

The pulse oximeter sends red and infrared light through a spot that has a lot of blood flow such as a finger. A sensor on the other side measures how much light was absorbed, and in what wavelengths, and uses that information to calculate the comparative concentrations of oxygenated and deoxygenated blood.

Answer 5

Oxygen saturation describes the extent the to which hemoglobin in the red blood cells is saturated with oxygen.

Answer 6

90-100%.
Anything below 90% saturation is considered hypoxic.

Answer 7

Oddly enough, the blood haemoglobin oxygen saturation.

Answer 8

pulse oximeter