Difference between prothrombin time and clotting time
Answers
When you get a cut, your body jumps into action to keep things from getting out of hand. Cells called platelets get there first to slow the bleeding. Then, a bunch of proteins, called clotting factors, show up. They all fit together to form a solid mass -- a blood clot -- to stop the bleeding so you can start healing.
That’s what typically happens. But if you tend to bleed easily or you get clots when you shouldn’t, then you may have a problem with your clotting factors.
That’s when you might need a prothrombin time test, which measures how quickly your blood clots. It’s also called a PT, pro time, or INR test.
Clotting time is the time required for a sample of blood to coagulate in vitro under standard conditions. There are various methods for determining the clotting time, the most common being the capillary tube method. ... Normal value of clotting time is 8 to 15 minutes.
Answer:
Prothrombin time assesses the extrinsic (factor VII) and common (factors X, V, II [prothrombin] and I [fibrinogen]) pathways, whereas aPTT assesses the intrinsic (prekallikrein, HMWK, and factors XII, XI, IX, and VIII) and common pathways.