H-PF4 antibody
tests
DVT confirmed by Doppler
Thrombocytopenia after surgery
(1st nadir)
Positive n=4
Negative n=36
Not done n=102
0
4
0
Thrombocytopenia after initial recovery (2nd  nadir) Positive n=0
Negative n=2
Not done n=7
2
5
2
Table 2: Patients Subgroups with Testing for DVT.