When measuring calcium...What is ptu (propylthiouracil)? And what does 164 mean for me? What is the norm for 41 years old?

Pth? I think you meant PTH instead of ptu (propylthiouracil). The normal values vary with the lab that you went to so you need to look at the normal range that came with the lab. In my lab, 60 is the highest normal so 164 would be high.