What is RDW Analysis | The most prominent medical information about him 2022


What is RDW analysis?

Blood cells in the human body are divided into three types, which are red blood cells, white blood cells, and platelets, and each of these three types has its own tasks, which are as follows:

  • Red blood cells: Red blood cells transport oxygen from the lungs to all organs and tissues of the body.
  • White blood cells: White blood  cells are an integral part of the immune system of the human body, as they fight and fight viruses and germs that enter the body.
  • Platelets:  The only function of platelets is blood clotting.

Hemoglobin is one of the most important components of blood cells, and the healthy level of it in men ranges between 38.8-46.4%, while in women it ranges between 35.4-44.4%.

The RDW test is part of the complete blood count group, which examines and measures the heterogeneity of red blood cells.

The presence of a large variation in the size of red blood cells is a significant indicator of the presence of some health problems, as the diameter of normal red blood cells ranges between 6 to 8 micrometers.

The presence of some problems in hemoglobin may change the size of red blood cells, and thus there is a problem in the flow of oxygen to all parts of the body.

When should an RDW analysis be performed?

An RDW analysis should be used in some cases that need to be reassured about the red blood cell volume measurement, including the following:

  • If there is a family history of one or some inherited blood diseases such as thalassemia or sickle cell anemia.
  • If the person suffers from a chronic disease such as diabetes or Crohn's disease.
  • If the person has one of the symptoms of anemia, which is dizziness, pallor of the face, weakness and imbalance.
  • When you follow a diet that lacks iron and minerals necessary for human health.
  • If the person loses a very large amount of blood as a result of a surgical operation or when he suffers a serious injury.
  • If there is a chronic infection that has been present for a long time.
  • If there is an increase or decrease in the results of the examination of blood clotting or platelets in the body.
  • When there is a severe deficiency in the assessment of acquired immunity, as a result of a decrease in white blood cells in the body.
  • When suffering from a cancerous disease such as leukemia or cancer of the lymphatic system, especially when suffering from rectal cancer or colon cancer.
  • An RDW test can be done as a routine check up before a surgical procedure is performed.
How is an RDW analysis performed?
How is an RDW analysis performed?

How is an RDW analysis performed?

There is no reason to do anything to prepare for an RDW analysis, such as fasting or otherwise, and in most cases, the specialist doctor will tell you the instructions and instructions used to perform the RDW analysis.

The analysis is done by inserting a small needle into a vein in the arm to withdraw a sufficient sample of blood. This small needle is connected to a test tube to enter the blood with it.

There is no danger when doing this analysis, and all that can happen is a weak pain or the appearance of a small bruise after entering the needle and drawing blood, but there is nothing worth worrying about.

Normal RDW Analysis Measurements and Values

The normal RDW analysis values ​​and measurements for both men and women range as follows:

  • Measurements are at the normal level in men when it ranges between 11.8 - 15.6%.
  • The values ​​are normal in women when the measurements range between 11.9 - 15.5%.

It must be noted that there may be a health problem despite the presence of a normal measurement of the level of red blood cell volume, in which case another analysis called MCV, which is known as (mean cell volume) must be performed.

It is the mean corpuscular volume analysis, and this analysis is performed to compare its results with the results of the RDW analysis to confirm the diagnosis of the patient's condition.

There are some cases in which there are normal results for the RDW analysis with a different value for the MCV analysis, and these cases are as follows:

RDW analysis value is normal and MCV value is elevated

These results occur when there is one of the following reasons:

  • Aplastic anemia, which is known as (Aplastic anemia).
  • Having a chronic liver disease.
  • Taking many antivirals or taking chemotherapy.

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