Serum Glucose

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Glucose: Reference Range, Interpretation, Collection And Panels

Postprandial plasma glucose at 2 hours: Less than 140 mg/dL Random plasma glucose: Less than 140 mg/dL Serum glucose values are 1.15% lower than plasma glucose values. [ 1 ] Values for diabetes mellitus are as follows: Fasting plasma glucose: Greater than 125 mg/dL Random plasma glucose: Greater than 200 mg/dL Postprandial glucose at 2 hours: Greater than 200 mg/dL Impaired fasting glucose: Fasting glucose of 100-125 mg/dL Impaired glucose tolerance testing: Postprandial glucose at 2 hours of 140-200 mg/dL The value for hypoglycemia is as follows: Collect 0.5-1 ml of blood in gray-top tube containing sodium fluoride. For serum glucose, a red-top tube can be used. Serum is separated within 45 minutes of collection. For fasting glucose testing, collect the blood sample in the morning after an overnight or 8-hour fast. For postprandial glucose testing, collect the blood sample 2 hours after a regular meal. For oral glucose tolerance testing, after oral intake of 75 g of glucose, collect blood samples at 1 hour and 2 hours. For gestational diabetes testing, parameters are 1 hour after 50 g of glucose and 2 hours after 100 g of glucose. Glucose is a monosaccharide and is a primary meta Continue reading >>

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Popular Questions

  1. bmelikia

    Question: Blood Glucose Levels AFTER Eating

    Hello Community,
    A little background. . .I am a 29 year old male. I am not "diabetic" but my father was diabetic. I have been getting my blood glucose reading, as well as my a1c, the last several times that I've had my cholesterol checked. My fasting number have been between 100 and 110. My worst a1c so far has been 5.6. I guess I'm in the "prediabetic" stage.
    I'm curious to know - in healthy individuals without diabetes - how high does ones blood sugar spike 1 hour - 2 hours AFTER eating?
    What would be the Post Porandial blood glucose threshold that would need to be crossed to suggest that a person has a potential problem?
    I'm asking because I just started testing my blood at home and have seen that at times I've spiked as high as 186 and 238 approximately 1 hour after eating. I generally seem to go back down near 100-110 approximately 2-3 hours after eating.
    Thank you for your help

  2. angelhart1964

    People with diabetes when they don't eat it makes it go up , and if we don't watch what you eat it goes up, but when you eat it will go back to normal I hope that helps,

  3. bmelikia

    Could you try explaining that to me another way? I'm not sure I understand. Thanks

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