oximetry performed noninvasively, usually on the finger or ear lobe, in which the small increase in absorption of light during the systolic pulse is used to calculate oxygen saturation.Oxygen saturation measurement, SaO Critical care.ximetry performed noninvasively, usually on the finger or ear lobe, in which the small increase in absorption of light during the systolic pulse is used to calculate oxygen saturation.
The baseline for the populationâs percentage of left-handed people is around 10 percent, but in some societies that number is far greater. Among Venezuelaâs Yanomami tribe, about 5 in every 1,000 people are murdered yearlyâand about 23 percent of the population is left-handed. For the Eipo in Indonesia, the murder rate is 3 in 1,000, and theyâre about 27 percent left-handed. And then there are the people of Jimi Valley in Papua New Guinea, who have a murder rate of 5.4 in 1,000 and an above-average instance of left-handed people at 13 percent.
Left-Handedness Stumps Science. They make up a stable fraction of the population, yet their presence is often invisible: left-handers. Yet despite decades of research, very little is known about why some people are left-handed. Scientists have proposed causes ranging from genes, to damage in utero, to an edge in fistfights to explain why southpaws make up 10 percent of the world's population.