In the hospital, there are a lot of equipments and gadgets that nurses need to know. Just like finger pulse oximeter. It used to monitor oxygen saturation and pulse rate.It is a simple procedure but if it is taken for granted it will lead to some complications. The pulse oximeter should be changed in every certain hours so that the finger will not be become cyanotic or became dead. Nurses have a big part on the patients quick recovery because of their efficient nursing care to all the patients.