An ear infection is an inflammation of the middle ear, usually caused by bacteria, that occurs when fluid builds up behind the eardrum. Anyone can get an ear infection, but children get them more often than adults. Five out of six children will have at least one ear infection by their third birthday.
Red blood cell distribution width is a way for scientists to measure red blood cell volume and size. When red blood cells are larger than normal, that could indicate a problem. The reference range for RDW is as follows: RDW-SD: 29-46 fL.
Red blood cell distribution width. Human red blood cells. The red blood cell distribution width , or RDW , is a measure of. the variation of red blood cell width that is reported as part of a. standard complete blood count. Usually red blood cells are a standard. size. Certain disorders, however, cause a significant variation in cell. size.