Blood oxygen levels under 90 percent are considered low and warrant immediate medical attention, according to the Mayo Clinic. A dangerous blood oxygen level, also called hypoxemia, occurs when a lower-than-average level of oxygen is circulating from the blood to the cells and tissues of the body. Normal blood oxygen levels are within the 95 to 100 percent range.Know More
According to WebMD, symptoms of low blood oxygen levels include shortness of breath, fast heart rates, sweating, wheezing, mental confusion, coughing and changes in the color of the skin that can range from cherry red to blue. When these symptoms are experienced by any individual, WebMD recommends calling 911 emergency services immediately.
Causes of low blood oxygen levels include anemia; pneumonia; ARDs, or acute respiratory distress syndrome; COPD, or chronic obstructive pulmonary disease; pulmonary edemas; sleep apnea and congenital heart disease. Other causes of hypoxemia include interstitial lung disease, high altitudes, blocked airways and anesthetics or narcotic medications, according to the Mayo Clinic.
WebMD also lists severe asthma attacks as potentially life-threatening causes of hypoxemia. During these occurrences, the airways narrow, making it harder to get air into the lungs. Many individuals instinctively cough, which uses more oxygen and can exacerbate the problem. Therefore, individuals with asthma must always have their rescue inhalers on hand and adhere strictly to their medically supervised asthma treatment plan.Learn more about Medical Ranges & Levels
A normal oxygen level is 95 to 100 percent oxygen, as measured by pulse oximetry, says the Mayo Clinic. A pulse oximeter is a small device which clips on a finger and measures oxygen saturation in the blood, a measurement which is usually considered to be the equivalent of blood oxygen levels.Full Answer >
Oxygen attaches to hemoglobin in the blood that carries it to other tissues, so when the red blood cell count is low, the blood oxygen levels also drop. When a person does not have enough healthy red blood cells, he is anemic, according to MedlinePlus.Full Answer >
Elevated red blood cell counts may occur in response to dehydration, which decreases blood plasma levels, according to Mayo Clinic. Kidney, heart and bone marrow disease may also increase red blood cell production. This occurs in people who smoke, have sleep apnea or live in high altitude areas as wellFull Answer >
A fasting blood-sugar level below 100 milligrams per deciliter is considered normal, according to Mayo Clinic. Those with fasting blood-sugar levels between 100 and 125 milligrams per deciliter are said to be pre-diabetic, and those with levels above 125 on two separate occasions are diagnosed with diabetes.Full Answer >