Quote:
Originally Posted by Riot
No, you're right - splenic contraction increases the RBC thus PCV.
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Couldn't you draw the blood levels prerace and match them versus a baseline? If a horses prerace hematocrit level is off the charts then it would be scratched?
I think the cyclists do 50% level = a "positive" test.
In racehorses I like to see the levels over 40 though the "normal" range is usually called at 34-42. Sometimes in the summer we might see a higher level because of dehydration.