I am pretty sure this is what it refers to...


EURODICAUTOM

Subject Agriculture - Food Industry - Livestock Industry - Fisheries - Bio-industry (AG)
Statistics (ST)




(1)
TERM testigo

Reference Metro


Definition that part of an experimental series providing a standard of comparison for determining the effects of the treatment(s)

Reference Ford-Robertson,Soc.Am.Foresters
(1)
TERM control

Reference Ford-Robertson,Soc.Am.Foresters

Note {GRM} n.
(2)
TERM check

Reference Ford-Robertson,Soc.Am.Foresters

Note {GRM} n.
{REG} USA



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Note added at 15 mins (2003-08-30 20:15:20 GMT)
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Frequently Asked Questions about Prothrombin Time


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What is the Protime?
The \"protime\" (or \"prothrombin time\") is a method of measuring how well the body clots.


Why is the protime used to gauge liver function?
Since the liver makes the proteins (called clotting \"factors\") in the blood that make blood clot, the protime is a measure of how well the liver is doing what it should be. If the liver is failing then it stops making enough clotting factors, and the protime becomes abnormally \"prolonged\".

What is the normal protime?
The normal protime is determined by the laboratory each day by testing normal blood. ***Any specimens that day are then compared to the \"control\" normal value. Usually a normal control protime is about 11 seconds. When the protime is 22 seconds, it is said to be \"twice control\". Generally a protime is considered to be prolonged if it is more than 1.2 times the control time***.

http://www.transweb.org/qa/qa_txp/faq_protime.html