Clinical Use:
Background: Diabetes Mellitus (DM) is the term used to describe a group of metabolic disorders of carbohydrate metabolism resulting in hyperglycaemia. In extreme cases this can lead to the development of life threatening hyperglycaemic episodes such as ketoacidosis and hyperosmolar coma. Normal disease progression can result in increased risk of retinopathy, renal complications, neuropathy and atherosclerosis that in turn can lead to development of coronary heart disease.
Reference Ranges:
Sample Plasma venous glucose (mmol/l)
Diabetes Melltius Fasting or greater than or equal to 7.0
2 hour post glucose load Greater than or equal to 11.1
Impaired Glucose Tolerance Fasting and less than 7.0
2 hour post glucose load great than or equal to 7.8
Impaired fasting Glycaemia Fasting and greater than or equal to 6.1 and less than 7.0
2 hour post glucose load less than 7.8
Associated Diseases:
  • Diabetes Mellitus
  • Gestational diabetes
Patient Preparation:
Specimen Requirements: Sample type:

  • Capillary, venous or arterial whole blood specimens can be used.
  • Specimens taken into Lithium Heparin, EDTA, Fluoride Oxalate can all be used providing the specimen is mixed by inversion 10 times prior to analysis.
  • Serum and plasma can be analysed after centrifuging specimens.
  • For the purpose of glucose tolerance tests, venous whole blood collected into fluoride oxalate specimen tubes should be used (for both fasting and 120 minute specimens).

Sample identification:

  • Three patient identifiers from
    • Name
    • D.O.B.
    • Address
    • N.H.S. number
    • Unit Number

    should match on the specimen and request form. This check may be performed prior to centrifugation by the Central Sort department.

Turnaround Time: 2 hours
Additional Information:
Referred Test: