Barometric pressure therapy is a medical treatment. Artificial pressure elevation has been around for decades. It was first used to treat divers who were exposed to high pressure when submerged for long periods of time, resulting in a medical condition called the bends. Later, hyperbaric pressure chambers (typically at 150% to 300% elevated pressure) were developed to treat individuals with mountain sickness and, even later, used to promote wound healing. Only over the past 15 years has hyperbarics been used to treat a variety of other medical disorders.t first thought, you might expect the air of the atmosphere to distribute itself uniformly over the surface of the earth so that the barometric pressure at the same elevation would be the same everywhere. After all, the water in a pond or lake "seeks its own level," and, except for the tides, the water in the oceans does as well. But this is not the case with the atmosphere. Several factors, among them the rotation of the earth and the uneven heating of the earth's surface by the sun, come together to cause the air to seemingly slosh about so that at some places it is piled up deeper than at other places.