PT/PTT and INR
24 hours
Capillary Coagulation Test
Plasma.
The prothrombin time (PT) test measures how long it takes for blood to clot. This test evaluates the coagulation factors involved in the extrinsic pathway.
INR is "International normalized ratio": it is a test for blood coagulation.
Time of onset, and age
The principle of the heat coagulation test for proteins is based on the denaturation and coagulation of proteins when exposed to heat. By heating a solution containing proteins, the proteins unfold and aggregate, forming a visible clot or precipitate. This test is commonly used to assess the presence of specific proteins by noting the formation of a clot or precipitate upon heating.
A coagulation cascade is the sequence of biochemical activities, involving clotting factors, that stop bleeding by forming a clot.
Blue top tube which contains citrate.
There is one simple office procedure for the same. You take out about one ml blood from the vein of the patient. Feel the thin capillary glass tubes with this blood. Start breaking the small portion of the same every fifteen seconds. You will see the clot and that gives you the coagulation time. Alternately you can put a drop of blood on the glass slide. Try to move needle from the drop of blood. Note the time. When you can lift the clot by tip of needle, that is clotting time.
Blue test tubes are typically used for blood coagulation (BC) tests.
to compare the upper part with the lower part