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Many test tubes use EDTA as the anticoagulant - but there are other anticoagulants used as well. Be more specific if you wish a more specific answer.
EDTA
The tube tops can vary depending on supplier, but red top is normally with no anticoagulant so it is used for any tests requiring serum not plasma, so most virology and biochem tests. Not usually used for Haematology tests.
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Many test tubes use EDTA as the anticoagulant - but there are other anticoagulants used as well. Be more specific if you wish a more specific answer.
It hinders it. EDTA, a commonly used anticoagulant, works by chelating calcium. This also has the consequence that large volumes of blood transfusions causes calcium deficiency.
prothrombin time
C-reactive protein test (CRP)
The PTT test can be used to monitor the effect of heparin on a patient's coagulation system.
EDTA
Heparin (from ancient greek Hepar,liver)is widely used as an injectable anticoagulant, and has the highest negative charge density of any known biological molecule. It can also be used to form an inner anticoagulant surface on various experimental and medical devices such as test tubesand renal dialysis machines.
The anticoagulants most often used are ethylene-diamine-tetra-acetate (EDTA), ammonium-potassium oxalate (Heller and Paul double oxalate), and heparin. THIS LINK WILL ANSWER YOUR QUESTION IN THE FIRST PARAGRAPH (a.) http://www.free-ed.net/sweethaven/MedTech/Hematology/lessonMain.asp?iNum=0304
1. INR (international normalised ratio) 2. aPTT
The pro-time (PT) has traditionally been used. Currently, variations in the reagents used to conduct the test are corrected by using a math formula and are expressed as an international normalized ratio (INR).
The tube tops can vary depending on supplier, but red top is normally with no anticoagulant so it is used for any tests requiring serum not plasma, so most virology and biochem tests. Not usually used for Haematology tests.
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