types of blood collection tubes
purple bottle -
It is used for hematology tests the most common of these is the full blood count (FBC) this includes -
- hemoglobin(Hb) - which is an important investigation in numerous scenarios including blood loss .
- platelets - which if depleted can result in increased bleeding risk.
- white cell count - which is typically increased in infection .
the purple bottle is also used for other tests -
- - hba1c - which is important in the assessment of diabetic blood sugar control.
yellow (gold) bottle -
It is used for a range of biochemistry
tests including
- -urea and electrolytes (U&E) -
- sodium
- potassium
- urea
- creatinine.
used for assessing kidney function and detecting electrolyte derangement for example -hyperkalemia
other tests include -
- liver function tests
- c-reactive protein
- bone profile
- magnesium
- lipids
- thyroid function tests
- cardiac enzymes
the same bottle is also used for various more specialist endocrinology oncology toxicology virology and immunology tests .
blue bottle -
is for hematology tests to assess the clotting system-coagulation screen includes-
- prothrombin time(PT)
- activated partial thromboplastin time(APTT)
- fibrinogen
INR- is important for monitoring warfarin therapy
d-dimer's - are useful in the diagnosis of deep vein thrombosis and pulmonary emboli
gray bottle -
is used for two specific biochemistry tests -
- blood glucose -which can be a fasting or a random value .
- lactate -which can be raised in any addition causing tissue hypoperfusion for example-, sepsis or acute ischemia .
pink bottle -
is used to send the blood sample to the transfusion lab for patients who may require a blood
transfusion'
- group and save - determines and stores the patient's blood group so blood can be ordered swiftly if needed.
- cross match - refers to the process of ordering blood for the patient typically.
the bottle must be labeled by hand at the patient's bedside.
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