Hi!
It sounds like you had an arterial blood draw -blood taken from an artery rather than a vein for specific tests like blood gas levels (usually for respiratory or cardiac workup issues)....~MM
I don't think blood can be drawn from a muscle; it has to come from a vein.
Blood is typically drawn from the inside of the elbow; however, I have had it drawn from further down the inside of my arm, but never from a muscle.
Other than that, I don't understand your question. Is it thyroid related? What number are you talking about?
Is this a thyroid related question?
In all my time of having a bazillion and ten blood draws, and when the veins collapsed I have never had it taken from the front of the forearm. I have been in hospital over 16 times and had veins collapse and had it taken from my ankle.
What figure are you talking about? What was the test called?