A high RDW blood test result may indicate anemia due to either iron deficiency or a deficiency of folate and vitamin B12, according to Wikipedia. It may also be a result of a recent hemorrhage. False high RDW readings sometimes occur when the wrong type of blood is used for the test. As MedFriendly explains, other causes for a high RDW test result include liver disease and hemolytic anemia.Know More
An RDW test is a test of red cell distribution width, and it measures the variation in the size of red blood cells. According to MedFriendly, this test is often done in conjunction with measuring the mean corpuscular volume, or MCV, of the red blood cells. The MCV is the average amount of space that each cell takes up within the bloodstream.
A comparison of the RDW and MCV measurements helps to determine what type of anemia a person is experiencing. When anemia is present and RDW and MCV are both high, anemia is typically due to folate and vitamin B12 deficiency. As Health Research Funding explains, red blood cells increase in size due to B12 and folate deficiency, raising the MCV. When RDW levels are high but MCV levels are not, the cause is more likely iron-deficiency anemia. In iron-deficiency anemia, a lack of iron in the blood causes a decrease in hemoglobin, which is the substance in red blood cells that carries oxygen.Learn More
A PSA blood test is commonly used to predict, diagnose and monitor the presence of prostrate cancer in men. "PSA" stands for "prostrate-specific antigen," a protein produced exclusively by the male prostrate gland. PSA blood tests measure levels of this protein in the bloodstream, according to HealthCentral.Full Answer >
"BUN" stands for blood urea nitrogen and measures a person's kidney function. Urea nitrogen is produced in the liver from the breakdown of dietary proteins, and then normally functioning kidneys excrete it. A normal BUN range is between 7 and 20, according to the National Kidney Foundation.Full Answer >
Low MPV in a blood test means a person's mean platelet volume is lower than normal, according to WebMD. Mean platelet volume refers to the average size of the platelets in the blood.Full Answer >
A 39 on the AST blood test is slightly above the normal range of 10 to 34 international units per liter, notes MedlinePlus. AST, the abbreviation for aspartate aminotransferase, is an enzyme found in the heart, liver and other body tissues.Full Answer >