Pathology tests database

Sample and container requirements

Fluoride Oxalate Plasma

Minimum volume required

75 µL serum/plasma

Special requirements

None

Patient preparation

Please state on the request form "Fasting" or "Random" sample.

Sample viability

Turnaround time

This assay is run throughout the day and night. The in-lab turnaround time is normally less than 24 hours. The test can be ordered as an urgent request.

Reference range

There is no associated reference range for plasma glucose as the concentration should be assessed in conjunction with the fasting and diabetes status. Diabetes mellitus can be diagnosed based on random and fasting glucose. Various cut offs are quoted in the literature however the most commonly used are based on the WHO recommendations (2006) which states with symptoms of diabetes symptoms one requires: • A random venous plasma glucose concentration ≥ 11.1 mmol/l or • A fasting plasma glucose concentration ≥ 7.0 mmol/l (whole blood ≥ 6.1 mmol/l) or • Two hour plasma glucose concentration ≥ 11.1 mmol/l two hours after 75 g anhydrous glucose in an oral glucose tolerance test (OGTT). Gestational diabetes should be diagnosed if the woman has either: • A fasting plasma glucose level of 5.6 mmol/l or above or • A 2-hour plasma glucose level of 7.8 mmol/l or above.

Clinical guidance

Glucose measurements are used to screen for, diagnose, and monitor diabetic states. Measurements are also undertaken to investigate hypoglycaemic states associated with metabolic and other conditions in adults and children. Please refer to LabTestsOnlineUK to learn more about glucose. https://labtestsonline.org.uk/tests/glucose-tests Further information: UHB Local guidelines - Gestational Diabetes Mellitus Diagnosis and Management (CG1478) UHB Local guidelines - Use of Oral Glucose Toleranc eTest to Diagnose Type 2 Diabetes in Non-Pregnant Adults (CG1444)

Notes