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|Test code||PTHPR (Pre) & PTHPO (post)|
|Performed by||Parnassus, Mission Bay & Mt. Zion Chemistry|
|In House Availability||
|Collection Instructions||Any manipulation of either normal or abnormal parathyroid glands or surrounding tissue may result in a transient rise in hormone levels; therefore at least ten minutes should elapse between gland resection or manipulation and collection of samples for testing.|
|Container type||Lavender top|
|Amount to Collect||2 mL blood|
|Sample type||EDTA whole blood|
|Preferred volume||2 mL blood|
|Min. Volume||0.5 mL blood|
|Ref Lab Rejection Criteria||Sample received with needle attached.|
|Synonyms||PTH; IOPTH; Parathyroid hormone|
|Turn around times||15-30 min|
|Additional information||This test is not applicable for diagnosis and is used solely as an aid in determining the adequacy of parathyroidectomy in patients with hyperparathyroidism. Measures intact PTH molecule.
Samples are taken at baseline (prior to gland manipulation or removal) and again after
resection. A > 50% decrease from baseline suggests adequate parathyroid gland tissue has been resected.
Failure to achieve a > 50% decrease after tissue removal suggests additional hyperfunctional parathyroid tissue is still present.
Patient must be on OR schedule and samples must arrive in the laboratory at Mt. Zion before 1900 hours and at Partnassus before 2300 hours in order to be tested. Samples which arrive after 1900 hours at Mount Zion and 2300 hours at Parnassus will be frozen and tested the next run.
Note:L Serum levels are approximately 15% higher than plasma samples
|Last Updated||1/28/2015 3:02:27 PM|
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