Direct Coombs Test (DCT), Whole Blood EDTA Test
- Category
- Blood
- Sample
- Blood sample taken from a vein in your arm
- Reports () Terms & Conditions Report time varies with time of sample collection.
- In 3 days
- Fasting
- No Fasting
- Age
- 5+ Years
What Is This Test?
The Direct Coombs Test detects antibodies or complement proteins stuck to the surface of your red blood cells.
Why this test is performed?
Helps diagnose autoimmune haemolytic anaemia, investigate transfusion reactions and diagnose haemolytic disease of the newborn (when a baby's red cells are attacked by the mother's antibodies).
Who should take this test?
Tiredness, weakness, pale skin, fever, frequent infections, easy bruising or bleeding; routine health check-ups.
Test Preparation
No fasting needed.
Medical disclaimer · for information only, not medical advice
This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.
In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.
Read our Editorial Policy and Medical Review Process.
- Report time: In 5 days
- No fasting
- Report time: In 30 days
- No fasting
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Frequently asked questions
Your red cells are coated with antibodies, which can shorten their life. Your doctor will look for the cause, such as an autoimmune condition, medicine or transfusion.
No fasting is needed. You can eat and drink normally unless your doctor has advised otherwise.
Blood sample taken from a vein in your arm.
Usually within 31–55 hours after the sample reaches the lab. You will receive the report online.
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