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Glucose and Diabetes
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Currently under review
Pending specialist review and validation.
Blood Gas Glucose (Mixed Sample) measures the amount of glucose in whole blood using a blood gas analyzer. Mixed sample means the specimen may be arterial, venous, or capillary, depending on clinical need. The test is designed to deliver rapid results at the bedside or in the laboratory when quick decisions are needed.
Because it uses whole blood and blood gas instrumentation, results can differ slightly from standard laboratory plasma or serum glucose tests. Your care team interprets the result in the context of how and when the sample was collected and your clinical situation.
Glucose is your body’s primary fuel. Abnormally low or high levels can cause symptoms and affect the brain, heart, kidneys, and other organs. This test helps detect low blood sugar and high blood sugar, guides treatment for diabetes, and supports glucose management during acute illness.
It is commonly ordered in the emergency department, intensive care unit, operating room, and nursery when rapid information is important. It can help evaluate symptoms such as sweating, shakiness, confusion, or excessive thirst, and it supports safe use of insulin and other medicines that change glucose.
If your value falls within the reference interval for your age group, it is generally considered typical for your laboratory. A value below the interval suggests hypoglycemia, which may cause shakiness, sweating, hunger, or confusion. A value above the interval suggests hyperglycemia, which over time can increase health risks or reflect a temporary stress response.
Interpreting a single result depends on your symptoms, recent food or fluids, intravenous solutions, and medications. If a result is unexpected or does not match how you feel, your clinician may repeat the test or confirm with a standard laboratory plasma glucose. Do not change your medications without speaking with your care team.
People in the hospital or with critical illness may have different glucose targets than people at home. Your care team will explain what your result means for you and whether any follow up is needed.
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.
Meals, snacks, sugary drinks, and dextrose infusions can raise glucose, while prolonged fasting or missed meals can lower it. Tell your care team when you last ate or received IV fluids.
Arterial, venous, and capillary samples can differ due to normal physiology. Delays before analysis allow cells to consume glucose, which can lower results; prompt testing reduces this effect.
Drawing blood from or near an active infusion of dextrose or parenteral nutrition can falsely elevate glucose. Using a clean site and pausing infusions when appropriate helps avoid this.
Very high or low hematocrit and poor circulation from shock, hypothermia, or vasoconstriction can affect sensor performance and comparability to plasma methods on some analyzers.
Insulin and sulfonylureas tend to lower glucose; steroids, catecholamines, and some antipsychotics can raise it. High dose vitamin C or acetaminophen may interfere on certain devices.
Newborns and premature infants, pregnancy, liver or kidney disease, and endocrine disorders can alter typical glucose patterns and may require tailored interpretation and follow up.
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