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Eldon Biologicals Blood Type Test (Eldon Card) 2 Pack

  • Description
  • Features
  • Instructions
  • Whats in the Box?

It is essential that everyone know their own blood group and that of their family members. There are many occasions when knowing your blood group could be important, for example, if you or a member of your family, required an urgent blood transfusion it would be useful to know your blood group in advance. If it was an uncommon group it would allow the hospital valuable time to ensure adequate supplies.

If you travel overseas carrying a blood group card could prove invaluable. Accidents and other emergencies can often be dealt with more efficiently knowing the blood group of the person or persons involved.

This is a simple test which identifies your blood group easily and accurately.

Blood grouping is essential for safe blood transfusions. A patient must receive a blood type that is compatible with their own blood type. If the blood types are not compatible, red blood cells will clump together, making clots that can block vessels and cause death.

In general a person with type A blood can donate to a person with type A or AB. A person with type B blood can donate to a person with type B or AB. A person with type AB blood can only donate to a person with AB only and someone with O type blood can donate to anyone. This is because type O blood has no antigen on its surface and is often called a universal donor. Blood type AB is the universal recipient as they can receive red blood cells of any ABO type. In an emergency if there is no time for blood grouping the person in need of a transfusion would be given type O blood.

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In 1901, scientist Karl Landsteiner reported that blood could be classified into blood ‘types’.

There are 4 main blood groups A, B, AB and O, of which group O is the most common (47% of population). The blood type is determined by proteins called antigens found on the surface of red blood cells. If you have the antigen A on the red blood cells then you have got type A blood. When B antigen is present, you have type B blood, when both A and B are present, you have type AB blood. When neither are present you have type O blood.

Another blood group system involves Rhesus factors. The name Rhesus comes from the Rhesus monkeys in which the protein was first discovered. Rhesus factor D, the most important, is found in the blood of 85% of people, they are known as Rhesus positive. The remaining 15% are Rhesus negative. So people can be classified according to both systems, for example AB positive or O negative.

The Rhesus factor is important during pregnancy, a baby’s life can be endangered if it inherits a Rhesus positive blood type from its father while the mother is Rhesus negative. This is because the mother can form antibodies against the baby’s blood.

Here is a list of the blood types and their frequency in the UK population :

O Rh (D) Positive40%
O Rh (D) Negative7%
A Rh (D) Positive36%
A Rh (D) Negative6%
B Rh (D) Positive7%
B Rh (D) Negative1%
AB Rh (D) Positive2.5%
AB Rh (D) Negative0.5%

How accurate is this test?

The test is accurate and will detect the common blood grouping system A,B,O,AB and Rhesus(D). Unusual blood groups or rare sub-types will not be detected by this method. Further investigation by a blood transfusion laboratory will be necessary to identify such groups.

Please note: This test should not be used to determine blood type for transfusion purposes.


  • The card can only be used once
  • Do not use this test if the foil pouch has been opened
  • Perform test at room temperature

Instructions for use. 

Read the entire instructions before carrying out the test. Ensure the applicators (eldonsticks) are only used for stirring and spreading the blood. You may find this test easier to carry out if you have a friend or family member assist you.

  1. Wash your hands before carrying out the test and again after carrying out the test.
  2. Open the foil pouch containing the test card. Place the card on a table or flat surface.
  3. Lay out the applicators (eldonsticks) ready for use.
  4. Fill a small cup with tap water and using the plastic pipette, draw a small volume of the tap water into the plastic pipette. You draw the water by simply holding the small, thin end in the water and squeezing the top part.
  5. With the test card still on a flat surface release one drop of water onto each of the coloured reagents spots on the EldonCard.
  6. Twist off the little green protective cap from the lancet. Place the lancet upon a table.
  7. Wipe a fingertip with the alcohol impregnated tissue provided and allow it to dry.
  8. Place the lancet against the end of the finger and press the green body against your finger to release the needle.
  9. Massage the finger from the bottom to the top to encourage bloodflow. Press the blood towards fingertip. Repeat pressing until a drop with a 3 to 4 mm (1/8 inch) diameter is seen.
  10. Transfer the blood to an EldonStick, approached from beneath the finger. Don’t smear the blood over the skin.
  11. Place the eldonstick with the drop of blood into the first circle. The blood should touch the water already present. Gently press the side of the eldonstick head against the card and stir in the water and blood mixture until the coloured dry material has dissolved.
  12. Repeat this procedure for the other 3 circles, making sure you use a new eldonstick for each circle. You should NEVER transfer liquid from one circle to another.
  13. Once all 4 circles are complete gently tilt the whole card vertically on its bottom edge and keep this position for 10 seconds. You will see the blood flowing slowly to the bottom of the circle. Repeat this procedure tilting the card on the 3 other sides.
  14. As soon as you have finished tilting read and record the results immediately. See the table below for how the results are interpreted.

  • Instruction leaflet
  • Blood group test card x 1 (inside foil pouch)
  • Blood group result card
  • Lancets
  • Plastic pipette
  • Alcohol swabs
  • Applicators x 4.
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