<prompt> Pulse oximetry is used in:Blood volumeBlood coefficientLaser wavelength for estimation of blood flowProbe with diode is used to measure oxygen saturation  <response>: Pulse Oximetry is a non-invasive method to measure the oxygen saturation levels during the administration of anesthesia or other medications with the help of a finger, ear, or foot probes.The pulse oximeter sensor consists of two light-emitting diodes, one to transmit red light 660 nm and the other to transmit infrared light 940 nm, and a photodetector on the opposite side of the vascular bed. The light-emitting diode transmits red and infrared light through a vascular bed such as the finger or ear.Ref: Grossmans endodontics, 13th edition, pg no:76 