Common causes of upper back pain that do not involve the spine include: 1  Heart attack. 2  Pneumonia and pleuritis. 3  High blood pressure.  Fibromyalgia (widespread muscle pain and tenderness) or other chronic pain 1  syndromes. Problems with the esophagus, like acid reflux or heartburn.  Ribs that are bruised or broken due to trauma.
Normal Blood Oxygen Levels. Healthy people have a normal range of oxygen saturation from 95% â 100%, although levels down to 90% are common and not usually cause for alarm.During exercise, the increased oxygen consumption may reduce blood saturation, but the increased breathing rate and blood flow compensate for this.ecause hemoglobin saturated with CO (carbon monoxide) can not be differentiated from that with oxygen, a pulse oximetry test may indicate the blood level is normal, when in fact the oxygen levels are low.
I have taken children off oxygen at a level of 78 percent with doctors orders. There are certain conditions with babies that the low saturation is not a for certain indicator of death. levels of o2 depend on age and health. normal should be 90-100. panic should be below 87 however certain conditions permit lower levels. Talk with the doctors or health care people.