Performed at Sullivan Nicolaides Laboratory, Brisbane, Australia
This test may be vetted by a pathologist.
The clinical information for the test must be clearly written on the request form. If clinical information is not provided, or does not provide sufficient justification for the test, the test may be declined.
Declined tests :
If a test is declined, the specimen will be held for a reasonable period (usually 3 weeks but dependant on the stability of the sample). Medical practitioners seeking approval for a declined test should email the on-call Chemical Pathologist ( chemicalpathologist@adhb.govt.nz ) , giving the patient's name and NHI number and the clinical justification for the test. If unable to email, call the on-call Chemical Pathologist via Lablink (09-3078995) and identify yourself as a doctor.
Reference interval will be supplied by the testing laboratory in Australia.
Analyser: Diasorin Liaison XL analyser.
Principle: Diasorin 1,25-dihydroxyvitamin D sandwich-immunoassay (performed by Sullivan Nicolaides Pathology, Queensland, Australia)
This test is not a valid measure of Vitamin D status.
1,25-dihydroxyvitamin D is the active metabolite of Vitamin D. It may be elevated in patients with granulomatous disease and hypercalcaemia.
It may be useful in investigating patients with hypercalcaemia of unknown cause and a suppressed parathyroid hormone level.
There are very few other clinical indications which require this test.
The best measure of vitamin D status is 25-hydroxyvitamin D
Emails to chemicalpathologist@adhb.govt.nz will receive priority attention from the on-call chemical pathologist.
If the query concerns a specific patient please include the NHI number in your email.
If email is not a suitable option, please contact the on-call chemical pathologist via Lablink (Auckland City Hospital ext. 22000 or 09-3078995).
Individual chemical pathologists may be contacted but will not be available at all times.
After-hours : contact Lablink (Auckland City Hospital ext. 22000 or 09-3078995) or hospital operator for on duty staff after hours.
Dr Samarina Musaad (Clinical Lead) : SamarinaM@adhb.govt.nz ext. 22402
Dr Cam Kyle: CampbellK@adhb.govt.nz ext 22052
Dr Weldon Chiu: WeldonC@adhb.govt.nz ext. 23427
Dr Campbell Heron: CHeron@adhb.govt.nz ext. 23427
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Specimens are sent to Australia for analysis at least once a week.
Sample Serum
SST or Plain tube
Sample Stability 3 hours at room temperature
14 days at 4oC
Freezer if longer than 14 days
Sample Preparation Minimum volume of 500uL
Store at 4oC
Transport to LabPlus Can be sent at 4oC unless the transport time is likely to be
greater than 14 days - then send frozen