Table 1.

Median and range of anti-factor Xa activity in equine platelet-poor plasma spiked with various doses of unfractionated heparin (UFH).

UFH dose (U/mL)	Anti-Xa activity (U/mL)		Number of horses
	Median	Range
0	0	0–0	9
0.02	0	0–0	6
0.05	0	0–0	4
0.1	0	0–0.1	3
0.2	0.1	0.1–0.2	5
0.5	0.3	0.2–0.6	4
1	0.7	0.6–0.8	4
2	1.5	1.4–2.9	5