Speed:-  The pulse oximeter measures the arterial saturation of oxygen in seconds for a patient; measurements obtained from arterial blood gases (ABG) may take a few minutes to obtain and are usually drawn by a respiratory analyst, sent to the blood gas laboratory, calculated and reported to the doctor as a final point. Precise and easy to use:-  With most patients, pulse oximeters are precise, especially in crisis situations where seconds are also important. Most button operation oximeters and as long as the probe is correctly placed, it can be used by virtually anyone. Oximeters of the latest generation are sleek, rough and even easier to use. In addition, they are available for home use now.  Non-invasiveand reliable:-   The pulse oximeter performs through the nail-bed on a fingertip and measures. It is easy to use and very reliable if the oximeter is used properly and is regularly calibrated. Good peripheral circulation in the extremities of the patient is important for accurate measurements and most oximeters on the market integrate a perfusion gage that shows the patient's strength.