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Glucose and Diabetes
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Currently under review
Pending specialist review and validation.
This test measures the concentration of glucose in arterial blood, usually performed on a blood gas analyzer from an arterial puncture or an arterial line. It shows the sugar level circulating in your bloodstream at that moment and is often obtained alongside oxygen, carbon dioxide, and acid base measurements.
Because it uses arterial blood, it reflects the level being delivered to tissues and is useful when rapid, on-the-spot information is needed.
Clinicians use arterial glucose to quickly detect low or high blood sugar, guide insulin or dextrose therapy, and monitor responses to illness and treatment. It is commonly ordered during surgery, in intensive care, during diabetic emergencies, and when symptoms such as confusion, sweating, tremor, or palpitations suggest a problem.
Abnormal results can relate to diabetes, medication effects, infections, liver or kidney disease, hormonal conditions, or the body’s stress response during severe illness.
Your result is interpreted together with your symptoms, medical history, medications, and the clinical setting. If it is outside the expected range for your age, your team may repeat the test, confirm with a venous or plasma glucose, and review recent meals, tube feeds, or intravenous fluids.
High values may lead to adjustments in insulin or other therapies and checks for complications. Low values typically prompt immediate treatment and an evaluation for causes such as medications, nutrition, or endocrine issues.
Your clinician will outline next steps, which can include closer monitoring, changes to diet or medicines, and follow up testing.
Reference intervals vary by laboratory, analyzer, methodology, population, and units. The ranges shown here are for education only. Always interpret your results against the reference interval printed on your own lab report.
Glucose containing intravenous solutions or arterial line flushes can contaminate the sample and falsely raise the result if not cleared properly before drawing.
Recent food intake, tube feeds, or the stress of illness and surgery can raise glucose, while prolonged fasting or poor intake can lower it.
Insulin and insulin secretagogues lower glucose, while steroids, catecholamines, dextrose infusions, some antipsychotics, and certain HIV medicines can raise it.
Delays to analysis allow cells to consume glucose and can lower the measured value; rapid processing on a blood gas analyzer reduces this risk.
Sepsis, shock, liver failure, kidney disease, and endocrine disorders may raise or lower glucose and change how your body regulates it.
Newborns have different expected ranges, and pregnancy or advanced age can alter glucose regulation, affecting interpretation and targets.
References