What Is the Red Blood Cell Distribution Width?
The red blood cell distribution width RDW is a parameter reflecting the heterogeneity of red blood cell volume. It is expressed by the coefficient of variation of the red blood cell volume, which is more objective and accurate than the observation of uneven red blood cell size on blood smears.
Red blood cell distribution width
- Chinese name
- Red blood cell distribution width
- Foreign name
- Red Cell volume Distribution Width
- Purpose
- Classification for anemia
- Nature
- Parameters reflecting red blood cell volume heterogeneity
- RDW-CV
- Normal reference value 11.0-16.0
- RDW-SD
- Normal reference value 35.0-56.0
- Short name
- RDW
- The red blood cell distribution width RDW is a parameter reflecting the heterogeneity of red blood cell volume. It is expressed by the coefficient of variation of the red blood cell volume, which is more objective and accurate than the observation of uneven red blood cell size on blood smears.
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- The red blood cell distribution width output is divided into two items:
- Red blood cell distribution width variation coefficient (RDW-CV)
- Red blood cell distribution width standard deviation (RDW-SD)
- Among them, the normal reference range of RDW-CV is 11.0-16.0%, and the normal reference range of RDW-SD is 35.0-56.0fl.
- A low value indicates that red blood cells are more tidy than normal human red blood cells, which has little clinical significance.