Specimen EDTA Please note: Sample type for parathyroid hormone (PTH) changed from serum (gold top) to EDTA (purple top) on 24th October 2022. This is to increase the stability of PTH and prevent unnecessary re-bleeding of patients. PTH can be analysed on EDTA for up to 48 hrs post-collection. Units pmol/L Reference Range 1.6 – […]
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