Charlotte Miller

What Is PDW In Blood Test?

Are you curious to know what is PDW in blood test? You have come to the right place as I am going to tell you everything about PDW in blood test in a very simple explanation. Without further discussion let’s begin to know what is PDW in blood test?

When you undergo a comprehensive blood test, you may come across various parameters and acronyms that might seem unfamiliar. One of these is PDW, which stands for Platelet Distribution Width. PDW is a valuable component of a complete blood count (CBC) that provides insights into your overall health and can help diagnose various medical conditions. In this blog post, we will explore what PDW is, why it is important, and what abnormal PDW levels might indicate.

What Is PDW In Blood Test?

Platelet Distribution Width (PDW) is a measure of the variation in platelet size in a blood sample. Platelets, also known as thrombocytes, are tiny cell fragments in your blood that play a crucial role in blood clotting and wound healing. PDW specifically assesses the range of platelet sizes present in your blood.

How Is PDW Measured?

PDW is measured as part of a CBC, a routine blood test that provides information about the composition of your blood. The CBC includes various parameters such as hemoglobin levels, red blood cell count, white blood cell count, and platelet count. PDW is determined using a machine called a hematology analyzer, which analyzes a blood sample and generates a complete blood count report.

The Significance Of PDW

PDW serves as a valuable tool for healthcare professionals to assess and diagnose various medical conditions. Here’s why PDW is important:

  1. Platelet Health: PDW helps evaluate the health and functionality of your platelets. Platelets come in different sizes, and variations in size can indicate underlying health issues.
  2. Blood Clotting Disorders: Abnormal PDW levels can suggest the presence of blood clotting disorders or other conditions that affect platelet function. High PDW may indicate increased platelet destruction or abnormal platelet production, while low PDW may be associated with certain platelet disorders.
  3. Inflammatory Conditions: PDW can also be influenced by inflammatory conditions in the body. Inflammation can lead to changes in platelet size and distribution, which are reflected in the PDW value.
  4. Diagnostic Tool: PDW, when considered alongside other CBC parameters, can aid in the diagnosis of various medical conditions, including thrombocytopenia (low platelet count), thrombocytosis (high platelet count), and bone marrow disorders.

Interpreting PDW Levels

PDW levels are typically reported as part of the CBC results. The interpretation of PDW values may vary slightly among laboratories, but in general:

  • Normal PDW: A normal PDW value falls within a specific reference range established by the laboratory conducting the test. This range can vary, so it’s essential to refer to the specific reference values provided with your test results.
  • High PDW: An elevated PDW may suggest conditions such as platelet destruction disorders, bone marrow disorders, or certain inflammatory conditions.
  • Low PDW: A low PDW may be associated with conditions like Bernard-Soulier syndrome, May-Hegglin anomaly, or other rare platelet disorders.

It’s important to remember that PDW values are just one part of a comprehensive blood test, and healthcare professionals consider these values in conjunction with other clinical information to make accurate diagnoses.


Platelet Distribution Width (PDW) is a vital component of a complete blood count (CBC) that provides insights into platelet health and blood clotting functions. Understanding PDW values and their significance can help healthcare professionals diagnose and monitor various medical conditions. If you receive blood test results with abnormal PDW values, it’s essential to consult with your healthcare provider for further evaluation and guidance on any necessary treatments or follow-up tests.


How Much PDW Is High?

The reference ranges for MPV and PDW were 8.6–15.5 fL and 8.1–25.0 fL, respectively.

What Is The Normal Range For PDW%?

The value of PDW ranges from 8.3% to 56.6% in healthy individual. It is the measure of variability in size of platelets. The changes in the PDW and MPV are always in the same direction, that is, if MPV increases, PDW also increases and vice versa.

Is 18 PDW High?

PDW: Means the platelet distribution, this index has a normal value of 7 – 18%. If it is higher than normal, it means that the platelets are not of equal size. If it is larger than normal, it may suggest sickle cell disease, pulmonary disease, infection, and some other pathology.

What If PDW And Mpv Is High?

Background: Platelet indices are potentially useful markers for the early diagnosis of thromboembolic diseases. An increase in both mean platelet volume (MPV) and platelet distribution width (PDW) due to platelet activation, resulting from platelet swelling and pseudopodia formation was hypothesized.

I Have Covered All The Following Queries And Topics In The Above Article

PDW In Blood Test Low

PDW Blood Test High

PDW Blood Test Normal Range

How To Decrease PDW In Blood

PDW High Causes

PDW Blood Test High In Pregnancy

PDW Normal Range In Percentage

Mpv Blood Test

What Is PDW In Blood Test

What happens when PDW is high