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
|
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.
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
Dr Sakunthala Jayasinghe: Sakunthala@adhb.govt.nz ext. 23427