You test for lupus anticoagulant [LAC] using a low-PL PTT reagent and a hex-phase high-PL mix. The mix results are 10 seconds shorter than the first test. What do you conclude?

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LAC-positive
50% (9 votes)
LAC-negative
6% (1 vote)
Inconclusive
11% (2 votes)
First confirm with DRVVT
33% (6 votes)
Total votes: 18