QuoteGiven all that, samples tested by the British could be beyond tolerance in Kentucky. Who knows? Another battle of Lexington - southern division - could be in the offing.
Every individual laboratory runs hundreds of samples for a test on it\'s own machines, and the values of those samples establishes the lab\'s own \"reference ranges\" (often called \"normals\", but they are technically not \"normals\").
These reference range levels are adjusted constantly by the laboratory supervisors. They are established statistically. They are reviewed frequently.
Those are the \"reference ranges\" you see listed on a laboratory sheet with your test results from that laboratory.
One laboratory\'s lower reference range for one test may be, for example, Lab A = 0.4 ng/Ul, while another laboratory\'s lower reference range may be Lab B = 0.5 ng/Ul.
What \"reference range\" means is only that X% of animals or humans test within that range. Other animals test above or below.
Being above or below the reference range for a particular laboratory may or may not mean the value is abnormal or indicates a problem.
There are also established \"reference ranges\" for individual metabolic values in the literature, the general lower and upper ends of values.
So if I run a blood test on you, and your value comes back 0.3 ng/Ul, I may worry about it a tad more if it came from Lab B above, not Lab A. Because the deviation from the reference range is larger. But that value could still be completely normal in the individual patient.
The tolerance levels acceptable are established working with the laboratories. If a new laboratory opens in Kentucky, I have no doubt whatsoever the racing commission and the laboratory will talk to each other about them, after the new laboratories machines are in service and they run samples and establish reference ranges.