Haematocrit

What is being analysed?

Haematocrit is a blood test that measures the percentage of red blood cells (RBCs) in your blood. It provides valuable information about your overall blood health and oxygen-carrying capacity.

What does the result mean?

The haematocrit result indicates the proportion of RBCs in your blood volume. A higher haematocrit suggests dehydration, polycythaemia (excess RBCs), or other conditions, while a lower haematocrit may indicate anaemia or blood loss.

Why do the analysis?

Haematocrit analysis helps diagnose various blood disorders, monitor treatments like blood transfusions or erythropoietin therapy, assess hydration status, and evaluate overall health.

When to do the analysis?

Haematocrit testing is often included in routine blood screenings during annual check-ups, pre-surgery evaluations, or when symptoms such as fatigue, weakness, or shortness of breath suggest possible blood-related issues.

What sample is required?

A blood sample is required for haematocrit analysis. It's typically drawn from a vein in your arm using a needle.

Is any type of prior preparation necessary?

No specific preparation is usually required for haematocrit testing. However, it's essential to inform your healthcare provider about any medications, supplements, or recent illnesses that might affect the results.

How is it used?

Haematocrit results are interpreted alongside other blood tests and clinical information to diagnose conditions such as anaemia, polycythaemia, dehydration, or blood loss. It guides healthcare providers in determining appropriate treatments and monitoring disease progression.

What are the normal values?

The normal haematocrit range varies according to age groups, with adult males having a range of 40% to 54%, adult females 37% to 47%, and children with values that vary depending on their age.

What does it mean to have altered values?

High Haematocrit (Polycythaemia): May indicate conditions like dehydration, lung disease, kidney disease, bone marrow disorders, or polycythaemias vera.

Low Haematocrit (Anaemia): Can be caused by nutritional deficiencies (iron, vitamin B12, folate), chronic diseases, bleeding disorders, bone marrow problems, or excessive blood loss.

Table of normal Haematocrit values

Age Group        

Normal Haematocrit Range

Adult Males

40% to 54%

Adult Females 

37% to 47%

Children

Varies with age

Note: Values may vary slightly between different laboratories and population groups. Always consult with a healthcare professional for interpretation of your specific results.