Pulse oximetry

Pulse oximetry :-

•          Non invasive – oxygen saturation monitoring device widely used in medical practice.

•          In the red range the oxyhaemoglobin absorbs less light than deoxyhaemoglobin  & vice –versa in the infrared region.

•          System consists of a probe containing a diode that emits light in two wavelengths

•          Red –660nm

•          Infrared –850nm

•          Probe is placed on labial surface of tooth-ideally on middle 1/3rd & photodetector diode is placed on opposing surfaces of tooth.