Red cell Distribution Width (RDW) - Whole Blood

Red cell Distribution Width (RDW) - Whole Blood


This test is a calculation of the variation in the size of RBCs. This helps in understanding anemias and blood disorders

This Test Includes

RDW (Red Cell Distribution Width)

Test Instructions

Total parameters available: 1

Parameter Names:

  • Red cell Distribution Width (RDW) - Whole Blood

Test Instructions/Precautions:

  • Alcohol: Please abstain from alcohol before the test
  • Medication :Any pre-existing medication should only be stopped after consultation with the referring Physician
  • Fluids Allowed : Water only


Soft Copy (Portal/Email) : If the sample is collected before 12 noon then the report will get delivered as per Reporting Time / Maximum TAT (Turn Around Time) indicated with the test. For samples collected after 12 Noon, 12 hours may be added to the Report Turn Around TimeHard Copy : Delivered at home upon request. A small convenience fee may apply.

Why it is Done

The doctor orders a RDW test if and when- The patient exhibits symptoms of anaemia such as fatigue, dizziness, cold feet and hands, pale skin etc. The patient has a family history of sickle cell anaemia, thalassemia or any other genetic haematological condition. The patient loses excess blood during any medical procedure or in an injury. The patient suffers from a chronic illness like diabetes, HIV/AIDS or Crohn's disease. The patient is on a diet that is low in minerals and iron. The patient suffers from a long-term infection.

What is this test

A Red Cell Distribution Width test or RDW test, is performed to measure the range of variation in the size and volume of a person's red blood cells. The RDW test is done to diagnose anaemia, thalassemia, diabetes, liver diseases, cancer and heart diseases.