Pink blood bottle Pink blood bottle Overview You might also be interested in our OSCE Flashcard Collection which contains over 2000 flashcards that cover clinical examination, procedures, communication skills and data interpretation. However, to get an ESR you will need a full purple bottle. About 1ml of blood is sufficient to perform a full blood count. The purple tube needs inverting about 8 times to mix the sample with the EDTA. Less common tests performed using the purple blood bottle include: Blood film for abnormal cells or malaria parasites.Tests Common testsĬommon tests performed using the purple blood bottle include: Its blood-binding capacity means it can be labelled with radioisotopes and used as an EDTA scan to assess renal glomerular filtration rate. EDTA also binds metal ions in the blood and is used in chelation therapy to treat iron, lead or mercury poisoning. Purple blood bottles contain EDTA (ethylenediaminetetraacetic acid), which acts as a potent anticoagulant by binding to calcium in the blood. Purple blood bottles are generally used for haematology tests where whole blood is required for analysis. For more information on how to take blood, see our venepuncture OSCE guide. You may also be interested in our blood test reference ranges guide.
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