![]() ![]() If the amount of blood taken is too small, the lab will struggle to produce enough serum to test. When the laboratory receives your sample, it is spun and separated into the blood cells and liquid (serum) that surrounds the cells. Venous blood tests can also be affected by haemolysis when there are difficulties in taking the sample, although this is far less common.Īn insufficient sample simply means that there is not enough blood to test. Take your time and avoid both of the above reasons to reduce your chances of a haemolysed sample and having to re-take your test. ![]() Scrape your finger on the side of the tube instead of letting the droplets fall in.With a finger-prick sample, your sample may become haemolysed if you: We also recommend you give the container a gentle swirl after each drop of blood has been collected to help the sample mix together.Ī haemolysed sample can occur when some of the red blood cells burst and the haemoglobin (the protein in your red blood cells that carries oxygen to the body) escapes and spoils the surrounding sample. To avoid your blood sample clotting, carefully invert your tube five times (without shaking it). You have taken a while to collect your sample and the blood has clotted before you have mixed it.Your blood has not been mixed thoroughly after collection.It is your body’s natural defence in stopping you from bleeding excessively. The three most common causes of blood sample errors:Ĭlotting (also known as coagulation) is when your blood turns from a liquid to a gel. Here are the three most common causes of blood sample errors and how you can help to avoid them. Finger-prick tests are just as accurate as venous blood tests if collected properly. Although they are most likely to occur if a sample has been collected via the finger-prick method, errors can still arise when a venous collection method has been used (although this is far less common). Blood sample errors are a common occurrence and can happen for a variety of reasons. ![]()
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