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Originally Posted by Danzig
is there a way to know beforehand whether a horse will bleed at any given time? are there warnings, advanced notice? any way to know if it'll be a minor or a major episode?
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Unfortunately, no.
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since i've read that major bleeding can cause permanent damage that can lesser a horses ability in future, is there a way to know ahead of time what horses need lasix?
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Bleeding into the lungs is detectable in all race horse horses post-exercise:
5% of the time by waiting for blood to bubble up out of the lungs, up through the trachea, and gush from nostrils
75% of the time by using an endoscope to look for evidence of frank blood in the trachea
93% of the time by doing a transtracheal wash or broncheoalvelar lavage and seeing blood cells that have ruptured into the alveoli (air sacs).
The location of scarring is the capillary-aveolar sac interface.
On the track, horses don't get approved for lasix use until a vet documents a bleeding episode via endoscopy.