In the therapeutic use of heparin, the blood clotting time is usually maintained at what rate of the normal clotting rate?

The rate of a normal clotting 200 to 250 seconds. Blood clots are gel-like clumps of blood. They are beneficial when they form in response to an injury or a cut, plugging the injured blood vessel, which stops bleeding. A number of conditions can cause this type of blood clot.