<prompt> Pulse oximetry monitorsOxygen saturation of hemoglobinOxygen content of bloodPulse pressureOxygen paial pressure  <response>: Pulse oxymetry monitors hea rate, oxygen saturation of hemoglobin and gives aerial waveform. It works on the principle of transmission spectrophotometry and optical plethysmography. It has 2light emitting diodes.one is red with the wavelength of 660nm and other one is infrared with the wavelength of 940nm. 