What Is Important About the Test Systems Used for Detection

Multiple Choice

What is important about the test systems used for detection of the lupus anticoagulant?

A) The phospholipid concentration should be high.
B) Ellagic acid should be the PTT activator substance.
C) The patient plasma and normal plasma used for mixing studies should be platelet poor.
D) A 1:1 mix should be performed when the initial test is normal to improve the sensitivity.