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Understanding nosebleeds in racehorses
Dr Colin Roberts FRCVS
"One would imagine that bleeding into the lungs must be detrimental to performance, but there is little evidence of this. Se ...
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"Assessing Intrapulmonary Blood Accumulation in Racehorses with Exercise-Induced Pulmonary Haemorrhage (EIPH)" A report for the Rural Industries Research and Development Corporation
by Professor Ron Slocombe
https://rirdc.infoservices.com.au/downloads/99-168
Exercise-induced pulmonary haemorrhage (EIPH) is a condition that occurs in almost
all horses that compete. Although the basic mechanisms that lead to EIPH are now well
understood, an understanding of these mechanisms has not led to new ways to prevent
or treat EIPH. Large volumes of haemorrhage into lungs are known to severely affect
performance but the minimum volume of blood that affects performance has not been
determined. The effects of the presence of blood, especially at these minimum volumes,
on lung structure was unknown.
This research identified the effects of small volumes of blood on lung structure and on
performance, and explored ways of determining the amount of haemorrhage in live
animals after episodes of EIPH. The results of these investigations show that small
volumes of blood can affect performance, and that blood also induces long-lasting
changes in lung structure. (©OÓProf¸Ü¦³¼vÅT噃):yyy:
Furthermore, this publication considered the important issue of whether lung injury
could predispose to EIPH and confirmed under experimental conditions that it may,
therefore indicating that EIPH may predispose to further episodes of haemorrhage.
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