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Retired NBME Free 120 Answers
amm13e
i think with no proper Blood supply, the PTH cant sample the Ca2+ levels in the blood, making the gland secrete more PTH
+7
castlblack
secrete pth into where? the lost blood supply it doesn't have? Also, there are no parathyroid glands because the dude had a thyroidectomy!
+2
alimd
@castlblack maybe they left it hanging of the fucking veins)))
+2
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weenathon
I originally chose vein because I was thinking maybe the hormone release couldn't be carried to the body anymore, but looking back the working of "moderate hemorrhaging" and vessels requiring ligation is what implies it's an artery. Just throwing that out there in case you thought like I did.
+6
cheesetouch
if you were clueless like me (well I knew artery but..), picking one with 'thyro' in the name when discussing a thyroid surgery is a good guess :)
+10
cbreland
I'm really out here picking one of the answers with vein
+2
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tekkenman101
Main supply to parathyroids is inferior, so no.
+1
burak
everyone keeps saying it is sensing low ca level so secreting more pth. But Ca is already low so it is not sensing anything wrongly. Or I am just blind i dont know.
+1
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yng
Yes the superior part supplied by superior thyroid gland which is a branch of external carotid branch.
+1
suckitnbme
Superior thyroid artery does supply some blood to the parathyroids through anastomoses but the main vascular supply is from the inferior thyroid artery.
+2
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submitted by ivypoison(6)
Why high PTH 200pg/ml (normal <60)? it should be primary hypoparathyroidism!