Just wondered if anyone can answer this. If you are hypo and Free T3 is good - top of the range, or somewhere handy to it; is it possible to have a minus TSH - below zero, I mean? Apologies if this is a daft question, but you know how it is; one mulls things over...
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steviecat
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diogenesRemembering
Not in reality, but if some TSH tests have a zero standard that really isn't zero, then a patient's sample with a TSH lower than the "zero standard" will show negative.
Ah, that makes sense. Many thanks, Diogenes
Although if zero isn't really zero, how negative can one be, I wonder?
Steviecat,
It depends how low the assay registers. I've had <0.0001 and <0.001 both described as undetectable.
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