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Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...
Normal arterial blood oxygen saturation levels in humans are 96–100 percent. [1] If the level is below 90 percent, it is considered low and called hypoxemia . [ 2 ] Arterial blood oxygen levels below 80 percent may compromise organ function, such as the brain and heart, and should be promptly addressed.
A blood test is a laboratory analysis performed on a blood sample that is usually extracted from a vein in the arm using a hypodermic needle, or via fingerprick. Multiple tests for specific blood components, such as a glucose test or a cholesterol test , are often grouped together into one test panel called a blood panel or blood work .
female, fertile (days 12-14) 35-60 × 10 −11: female, luteal (days 15-28) 20-40 × 10 −11: female, pregnancy 3-70 × 10 −7: female, postmenopausal 1-3 × 10 −11: Estriol (E3) nonpregnant <2 × 10 −9: pregnancy, weeks 22-30 3-5 × 10 −9: pregnancy, weeks 32-37 6-11 × 10 −9: pregnancy, weeks 38-41 25-170 × 10 −9: Estrogen: male ...
Women with the highest levels of LDL cholesterol had a 36% higher risk for heart disease compared with those with the lowest levels. The highest levels of Lp(a) indicated a 33% elevated risk, and ...
The standard definition of a reference range for a particular measurement is defined as the interval between which 95% of values of a reference population fall into, in such a way that 2.5% of the time a value will be less than the lower limit of this interval, and 2.5% of the time it will be larger than the upper limit of this interval, whatever the distribution of these values.
Assuming a hemoglobin concentration of 15 g/dL and an oxygen saturation of 99%, the oxygen concentration of arterial blood is approximately 200 mL of O 2 per L. The saturation of mixed venous blood is approximately 75% in health. Using this value in the above equation, the oxygen concentration of mixed venous blood is approximately 150 mL of O ...
The pulse may vary due to exercise, fitness level, disease, emotions, and medications. [11] The pulse also varies with age. A newborn can have a heart rate of 100–160 bpm, an infant (0–5 months old) a heart rate of 90–150 bpm, and a toddler (6–12 months old) a heart rate of 80–140 bpm. [12]