Some of the most noticeable machines and robots out there today are things that cover a great deal of real estate and contain many large and complex moving parts. Some robots on the other hand are amazingly small or contain very tiny moving parts which aid in many types of human applications such as various medical procedures like a NY robotic hysterectomy that uses very small robotic machinery to assist in a procedure that is considered far less invasive than those performed in the past. In addition amazing new advances in small machinery are being made with things like swarm robotics.

While pulse oximeters are a non-invasive and easy method for obtaining information about a patient's arterial flow, a pulse oximeter might display incorrect reading under some circumstances. For example, severe hypo tension or some types of cardiac arrhythmias may influence a reading and lead to an incorrect analysis. If a patient is shivering or if he or she is affected by bright overhead lights, a reading may also be incorrect. Also, if a patient's nails are painted, this may cause a pulse oximeter to exhibit a falsely low reading although natural skin tone or issues of jaundice should generally not affect readings.