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. Author manuscript; available in PMC: 2018 Jan 1.
Published in final edited form as: J Thromb Haemost. 2016 Nov 30;15(1):57–65. doi: 10.1111/jth.13533

Figure 2.

Figure 2

This figure depicts the percentages of patients testing seropositive by low titre (OD > 0.4) and high titre (OD > 1.0) anti-PF4/heparin antibody definitions at preoperative, postoperative day 5 and postoperative day 30 timepoints. Adding a confirmatory step of heparin dependent binding (>50% reduction in optical density after the addition of excess heparin) reduces the number of seropositive patients by approximately one third in the low titre and one quarter in the high titre columns.