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Light Blue. The additive in these tubes is usually Na+ Citrate and there is a marking on the test tube to indicate the minimum fill. Blood must come at least up to the line or it will not be acceptable.
Coagulation time is the test in which venous blood is allowed to clot in a test tube.
sodium fluoride
baby blue
Blue top tube which contains citrate.
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First
For most of the blood tests fasting blood specimen is required
It heat ups specimen and with the use of the wire gauze it heats the entire beaker or test tube.
It prevents coagulation by binding calcium ions.
Light Blue. The additive in these tubes is usually Na+ Citrate and there is a marking on the test tube to indicate the minimum fill. Blood must come at least up to the line or it will not be acceptable.
sodium fluoride
Coagulation time is the test in which venous blood is allowed to clot in a test tube.
Usually, the vaccum in the tube is such that it cannot really be overfilled. Sometimes, blood is collected using a plain syringe and then put into a blue top. This can easily be the cause of cause overfilling. As for the effects, the ratio of the blood to anticoagulant would be such that there is less anticoagulant. This can cause the specimen to clot, and/or slightlydecrease the coagulation results. Less anticoagulant, clots faster.
Tiny clots will form in the specimen.