What age? - increases by around 50% with age.
See recent papers about apparently high prevalence of primary
hyperparathyroidism in Australia based on somewhat controversial
diagnostic criteria (since parathyroid nodularity is common - at least
5% of random autopsy studies - highish PTH + normal calcium +
high-normal PTH + apparent nodularity does not a diagnosis make).
Clearly reference ranges are also critical.
We use the Immulite as well, and don't see many healthy values above 9pmol/L
or so.
Aubrey Blumsohn
>We have done a reference range study for our PTH method and obtained
>a range calculated as roughly 2.0 - 10.0 pmol/L. The kit insert for
>this assay quotes 1.3 - 7.6 (Immulite 2000 intact PTH).
>The subjects were healthy volunteers with normal creatinine.
>I would like to hear of other people's experience, and welcome any
>comments.
>
>Samuel Vasikaran
>Royal Perth Hospital
>Western Australia
>
>
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|