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A B C D E F G H I J K L M N O P Q

Test Identifier Information

 
Registration CodeHBA
Method

Bio-Rad D100, cation exchange HPLC automated testing system.

Diagnostic Use / Indications

Evaluating the long-term control of blood glucose concentrations in diabetic patients.

Haemoglobin A1c measurement can also aid in diagnosis of diabetes.

Can help identify individuals who may be at risk for developing diabetes.

Refer to GroupAntenatal screen - first ;
External Price$13.10(Exclusive of GST)
  

Specimen Collection

 
Patient Specimen4.0mL EDTA (Lavender)
Paediatric Specimen3.0mL EDTA (Lavender)
Sample Delivery to Labambient, or 4˚C if overnight
  

Instructions for Referral to CHLabs

 
Aliquot Instructions50 uL in microtube - 4.0mL EDTA Blood is preferred.
Aliquot Transport to CHLambient, or 4˚C if overnight
  

CHLabs Laboratory

 
DepartmentBiochemistry - Protein Laboratory
Contact Details Email Email
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Contact Phone Number(03)3640334 | x80334
Test Availability2-3 runs daily Mon-Fri
Turnaround Time1 - 3 days
Reference Interval

Non-diabetic reference interval 20-40 mmol/mol.
Risk of microvascular complications increases exponentially above 55 mmol/mol.
If >/= 50 mmol/mol and not known to have diabetes, a repeat level >/= 50 after an interval supports the diagnosis.
If result is >65 mmol/mol, consider additional action.

Interpretation

 HbA1c measurements may be misleading in cases of haemoglobinopathy, increased red cell turnover or post transfusion.

Where there is a suspicion of interference from a Haemoglobin variant, further investigation may be undertaken.  This may include HbA1c measurement by an alternative method, haemoglobinopathy screen and mass spectrometry.  Clinicians should be suspicious when there is discordance between HbA1c and prevailing blood glucose and in that event, should contact the laboratory to discuss.

 

Additional Information

Fructosamine is no longer offered by this laboratory.

Please click on the following link to the New Zealand Society for the Study of Diabetes (NZSSD) website for assistance on the role of HbA1c in diagnosis and screening: http://www.nzssd.org.nz/hba1c.html

Delphic Number Test Number3564

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