What Is The Difference Between Rdw SD And RDW CV?

What is Rdw standard deviation?

RDW is the standard deviation (SD) of the red cell volume divided by the mean corpuscular volume (MCV).

Because higher MCV also predicts mortality risk, we hypothesized that RDW-SD (the RDW numerator) predicts mortality more strongly than RDW..

What does Rdw mean in a blood test?

A red cell distribution width (RDW) test is a measurement of the range in the volume and size of your red blood cells (erythrocytes). Red blood cells move oxygen from your lungs to every cell in your body.

What does low RDW and high MCV mean?

It may also indicate chronic liver disease. High RDW and low MCV. This suggests iron deficiency or microcytic anemia. High RDW and high MCV. This indicates a lack of B-12 or folate.

What is the normal range of RDW SD in blood test?

The reference range for RDW is as follows: RDW-SD 39-46 fL. RDW-CV 11.6-14.6% in adult.

What is Microcytic anemia?

Microcytic anemia definition Microcytosis is a term used to describe red blood cells that are smaller than normal. Anemia is when you have low numbers of properly functioning red blood cells in your body. In microcytic anemias, your body has fewer red blood cells than normal.

What does MCHC mean in a blood test?

RBCs with more hemoglobin result in a higher MCH and vice versa. The mean corpuscular hemoglobin concentration (MCHC) is a measurement of the average amount of hemoglobin in the RBCs compared to the average size of the RBCs. Put another way, the MCHC is the ratio of the MCH to the MCV.

What is Rdw SD and RDW CV?

The two RDW measurements currently in use are the red cell distribution width – coefficient of variation (RDW-CV) and the red cell distribution width – standard deviation (RDW-SD). The RDW-CV is a calculation based on both the width of the distribution curve and the mean cell size.

What does high RDW CV mean?

If your RDW is too high, it could be an indication of a nutrient deficiency, such as a deficiency of iron, folate, or vitamin B-12. These results could also indicate macrocytic anemia, when your body doesn’t produce enough normal red blood cells, and the cells it does produce are larger than normal.

What does a low RDW SD mean?

Deleted profile. A low RDW (below 10.2%) means that the red blood cells vary very little in size. One reason for a low RDW level is macrocytic anemia. Another cause of a low RDW level is microcytic anemia. In these two disorders the red blood cells do not vary much in size because they are either all small or all large …

What does Rdw SD mean in blood work?

Red blood cell distribution width (RDW or RDW-CV or RCDW and RDW-SD) is a measure of the range of variation of red blood cell (RBC) volume that is reported as part of a standard complete blood count. Usually red blood cells are a standard size of about 6–8 μm in diameter.

What are the symptoms of high red blood cell count?

If you have a high RBC count, you could experience symptoms such as:fatigue.shortness of breath.joint pain.tenderness in the palms of the hands or soles of the feet.itching skin, particularly after a shower or bath.sleep disturbance.

What can cause a high red blood cell count?

What causes a high red blood cell count?Heart failure, causing low blood oxygen levels.Congenital heart disease (born with it)Polycythemia vera (a blood disorder in which the bone marrow produces too many red blood cells)Kidney tumors.More items…•