Kaolin clotting time
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Not to be confused with Kaolin cephalin clotting time.
Kaolin clotting time (KCT) is a sensitive test to detect lupus anticoagulants.[2] There is evidence that suggests it is the most sensitive test for detecting lupus anticoagulants.[3] It can also detect factor VIII inhibitors but is sensitive to unfractionated heparin as well.[4]
The KCT on whole blood is known as the "Activated Clotting Time" (ACT) and is widely used in various instruments during surgery such as cardiac bypass to monitor heparin.[5]