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What is Packed Cell Volume or PCV Blood Test?

What Is PCV in a Blood Test?

Why is a PCV Test Necessary?

When Should I Get the PCV Test?

What is the Procedure for the PCV Test?

How Should You Prepare for the PCV Test?

How is PCV Measured in Blood Tests?

How to Read Results of PCV in a Blood Test?

Normal Range of PCV in a Blood Test

The results of PCV tests are given as percentages. If the PCV blood test results indicate a level of 50%, red blood cells fill 50 millilitres by volume in 100 millilitres of blood. Any increase or reduction in this value could be a sign of several illnesses and issues, some of which might be chronic.

The PCV test normal range varies depending on gender, age, and other factors.

S. No. Normal Range Gender
1 38-52% Males
2 34-58% Females

Having PCV levels below or above the recommended levels may mean different things for different people depending on their symptoms and testing requirements.

S. No. Range Status
1 < 35.5 Low
2 35.5 - 48.6 Normal
3 > 48.6 High

Symptoms of High PCV

The primary causes of high PCV include pulmonary or lung diseases, heart diseases, kidney cancer, and genetic disorders. 

Go through the following table to see the symptoms of high PCV. Individuals having high PCV levels experience the following symptoms:

Symptoms Description
Flushed Skin Increased red blood cells make the skin look reddened or flushed due to the high blood flow and vascular congestion.
Dizziness The thicker blood can reduce the efficiency of blood flow to the brain, leading to dizziness or lightheadedness.
Vision Problems High PCV can lead to changes in blood flow in the eyes, potentially causing blurred vision or visual disturbances.
Headaches Increased blood viscosity results in high blood pressure and reduced oxygen delivery to the brain, causing headaches.
Enlarged Spleen The spleen may enlarge (splenomegaly) in filtering and managing the increased red blood cells, leading to pain in the upper left abdomen.

These symptoms indicate the body's struggle to manage the high volume of red blood cells and can be associated with underlying conditions that require medical evaluation and management.

What If PCV in Blood is High?

What are the Causes of High PCV?

High-packed cell volume, or hematocrit, shows a high percentage of red blood cells in the blood. The causes of high PCV include the following:

Causes Description
Dehydration Plasma volume reduction from fluid loss or inadequate fluid intake may concentrate red blood cells and raise PCV.
Polycythemia Vera This bone marrow disorder causes excessive production of red blood cells.
Chronic Lung Diseases Lung disorders, like chronic obstructive pulmonary disease, increase red blood cells as a response to low oxygen levels.
Heart Disease Conditions of the heart may occur, leading to secondary erythrocytosis.
Kidney Disease Most kidney diseases are caused by excessive erythropoietin, which increases the hormone level that stimulates the formation of RBCs.

High PCV can also be an acclimatisation response to residing at high altitudes, whereby the body produces more red blood cells to facilitate better transportation of oxygen. If you think that you might have a high PCV, contact your healthcare provider to gain appropriate evaluation and management.

Symptoms of Low PCV

Medical experts associate low PCV with several medical conditions, such as chronic bleeding, bone marrow disorder, cancer, kidney failure, thalassemia, skin cell anaemia, and autoimmune diseases.

When an individual has a low PCV level, they have the following symptoms

Symptoms Description
Pale Complexion The skin's noticeable paleness can occur due to reduced blood flow, anaemia, or other underlying health conditions.
Weakness A lack of physical strength or energy can make everyday tasks or activities difficult. Various factors, including illness or nutritional deficiencies, can cause this.
Fatigue A state of extreme tiredness or exhaustion that is not relieved by rest. It can result from overwork, lack of sleep, or medical conditions.
Low Energy A general feeling of reduced vitality or endurance, where an individual feels less able to engage in regular activities or maintain usual activity levels.
Breathing Trouble Difficulty breathing, which may include shortness of breath, wheezing, or a feeling of breathlessness, can be a sign of respiratory or cardiovascular issues.
Irregular Breathing An abnormal breathing pattern, such as rapid, slow, or erratic breaths. It can be associated with various conditions, including anxiety, respiratory disorders, or heart problems.
Cold Feet or Hands A sensation of coldness in the hands and legs, even during summer, might indicate poor circulation, anaemia, or other circulatory issues.

What If PCV in Blood is Low?

What are the Causes of Low PCV?

Low PCV (packed cell volume), also known as low hematocrit, indicates a lower proportion of red blood cells in the blood. The causes of low PCV can include:

Causes Description
Anaemia Various forms include iron-deficiency anaemia, vitamin B12 or folate deficiency, and chronic disease.
Chronic Blood Loss From conditions like gastrointestinal bleeding, heavy menstruation, or trauma.
Bone Marrow Disorders Conditions like aplastic anaemia, leukaemia, or other myelodysplastic syndromes affect red blood cell production.
Hemolysis Increased destruction of red blood cells due to conditions such as hemolytic anaemia or autoimmune disorders.
Kidney Disease Chronic kidney disease can reduce erythropoietin production, essential for red blood cell production.
Nutritional Deficiencies Iron, vitamin B12, or folate deficiency can lead to decreased red blood cell production.
Chronic Inflammation or Infection Chronic diseases or infections that affect red blood cell production or lifespan.

A thorough evaluation by a healthcare provider is necessary to determine the specific cause and appropriate treatment.

Other Factors that Influence PCV Levels

FAQs about PCV in Blood Tests