Medical Definition of PULSE OXIMETER. : a device that measures the oxygen saturation of arterial blood in a subject by utilizing a sensor attached typically to a finger, toe, or ear to determine the percentage of oxyhemoglobin in blood pulsating through a network of capillaries and that typically sounds an alarm if the blood saturation becomes .... a device that measures the oxygen saturation of arterial blood in a subject by utilizing a sensor attached typically to a finger, toe, or ear to determine the percentage of oxyhemoglobin in blood pulsating through a network of capillaries.
Answer: The approximate distribution of blood types in the U.S. population is as follows: 1  O-positive: 38 percent. 2  O-negative: 7 percent. 3  A-positive: 34 percent. 4  A-negative: 6 percent. 5  B-positive: 9 percent. 6  B-negative: 2 percent. 7  AB-positive: 3 percent.
It is also the safest for newborn infants especially the ones with underdeveloped immune systems. However, O negative blood type is relatively rare compared to the other blood types. It is only present in 1 out of 15 individuals. This means approximately 6.6% of the population has O negative blood. However, not all of the ethnic groups share the same proportions of O negative blood types. This blood type is present in about 8% in Caucasians, 4% in African American, 4% in Hispanic, and 1% in Asian.