Patients with these diseases rely on regular blood transfusions as part of their ongoing treatment plan. Due to the high volumes of transfusions these patients receive, the closer a blood donation matches a patient’s blood type, the less likely they will experience side effects.
Whilst certain types of blood, such as O, A, B and AB are well known, there are actually 45 recognised types, with some being extremely rare due to several factors, including ethnicity.
The innovative new test uses DNA analysis to help find the best compatible blood for patients with complex requirements. The change is set to be particularly beneficial for patients with black, Asian, mixed race or ethnic background.
Sickle cell disorder is an inherited blood disorder, which is more common in people of Black African and Caribbean heritage and can result in severe organ damage and intense pain if damaged red blood cells block vessels and restrict oxygen supply.
People with thalassaemia cannot produce enough haemoglobin, which is used by red blood cells to carry oxygen around the body, causing severe anaemia, which can be fatal if not treated. Thalassaemia is mainly seen in patients with an Asian, Middle Eastern, or Southern Mediterranean heritage.
Life-saving transfusions are commonly used to treat rare inherited blood disorders, but around a fifth of patients develop antibodies against certain blood groups following transfusion. Due to the difficulty in finding suitable matching blood, patients can then experience treatment delays and although rare, in some instances experience blood transfusion reactions.
To help improve blood matching and reduce the risk of antibodies developing, the Welsh Blood Service and the Hereditary Anaemia Service in Wales are encouraging patients with sickle cell, thalassaemia or transfusion-dependent rare inherited anaemias to have this test taken alongside their routine hospital blood tests.