From 27th February 2014 we will be resuming a PTH service from Heartlands using the Roche intact PTH assay (iPTH). It is difficult to directly compare results determined from the previous Abbott assay to the Roche assay as the Abbott method had a significant positive bias with respect to Roche, therefore you should expect slightly lower results now. The reference range for iPTH on the Roche assay is 1.6-6.9 pmol/L.
Analysis will be batched daily, Monday-Friday. As previously plasma from EDTA samples is the preferred sample type. If there is a need for an urgent PTH the current process of contacting the duty biochemist/duty consultant will continue and the urgent pathway implemented. If there are any queries clinicians should contact the duty biochemist/duty consultant.