Please mark the request form clearly as "URGENT" and call the laboratory automation section on ext: 22118 or contact via LabLink ext:22000.
SPECIMEN: 5 mL venous heparinised whole blood, in a blood-gas syringe, or in a heparin tube with minimal air space.
- Must be analysed within one hour
- Note: arterial blood may give an inaccurate result
Units: kPa
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Reference range: 3.3 - 4.2 |
The p50 is the pO2 (in kPa) at which haemoglobin is half-saturated with oxygen. It is measured by some blood gas analysers.
The p50 may be abnormal with some haemoglobin variants. A lowered p50 indicates an increased oxygen binding affinity. This can lead to failure of haemoglobin to release oxygen to the tissues, resulting in tissue hypoxia despite normal arterial pO2 and good tissue perfusion.
The reference range above is not valid for cord blood due to the presence of foetal haemoglobin.
The chemical pathology team can be reached via email: chemicalpathologist@adhb.govt.nz or via Lablink (09) 307 4949 ext 22000 or 09-3078995
Emails will receive priority attention from the on-call chemical pathologist. Include the patients NHI.
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
- Dr Sakunthala Jayasinghe Saku.Jayasinghe@adhb.govt.nz
- Dr Owen Yi WenyiYi@adhb.govt.nz