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Doctor insights on: Glucose Tolerance Test False

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What oral glucose tolerance test result indicates diabetes?

What oral glucose tolerance test result indicates diabetes?

Unclear question: There is a set of rules for interpreting the results of ogt and it should be done by your doctor. ...Read more

Tolerance (Definition)

When one takes a drug, such as heroin or alcohol, repeatedly, 'tolerance' develops because more of the drug is needed to give the same effect on the body/brain; e.g. Liver enzymes r stimulated to metabolize the drug faster and faster. There may be a strong genetic predisposition to addiction, some studies suggesting that 1 of 10 people will become dependent on alcohol or some ...Read more


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Random blood sugar test result 375mg/dL repeat test done Fasting Plasma Glucose result 228mg/dL. Am I diabetic?

Random blood sugar test result 375mg/dL repeat test done Fasting Plasma Glucose result 228mg/dL. Am I diabetic?

Yes!: You are def a diabetic. Get a glucose meter and check some fingersticks. Completely NL in the AM fasting is 70-100. 101-125 is borderline, >125 is diabetes. Go see a diabetes doc and get an A1C test. Normal is up to 5.7. Pre-diabetic is 5.7 - 6.4. Diabetes is >6.4. Check out this link from the NIH: http://diabetes.niddk.nih.gov/dm/pubs/A1CTest/A1C_Test_DM_508.pdf. You need diabetic tx! ...Read more

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Have GTT test. Blood glucose normal. O hour and 1 hour urine glucose negative but 2 hour urine glucose is trace. False positive or renal glycosuria?

Have GTT test. Blood glucose normal. O hour and 1 hour urine glucose negative but 2 hour urine glucose is trace. False positive or renal glycosuria?

Urine glucose: If your GTT is OK and the 2 hour urine only a trace high, I don't think you have anything to worry about. That said, be careful with your food and drink intake. ...Read more

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How do fasting insulin test and glucose test differ?

How do fasting insulin test and glucose test differ?

Different tests: Insulin & glucose are 2 different ways to measure diabetes. Insulin is produced by pancreas to keep sugars under control. We measure glucose to see how well sugars are controlled. We can measure Insulin to determine how much effort pancreas is making to control sugars. Think of glucose as speedometer & Insulin as tachometer (hgba1c is avg trip speed - ask a car nut if this doesn't make sense). ...Read more

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Can pregnancy blood test give false negative. 3 days late, urine test negative and blood test negative too?

Can pregnancy blood test give false negative. 3 days late, urine test negative and blood test negative too?

False negative PG: A false pregnancy test is possible however, in this case you also have a negative blood pregnancy test which is far more accurate. ...Read more

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What's a 3 hour oral glucose tolerance test (ogtt) for diabetes?

What's a 3 hour oral glucose tolerance test (ogtt) for diabetes?

Gestational diabetes: A test for how you respond to known sugar loads in pregnancy and whether you are diabetic from pregnancy... If abnormal, may need to make changes in diet or meds. ...Read more

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Will an unrefrigerated urine sample cause an EtG test to test false positive?

Will an unrefrigerated urine sample cause an EtG test to test false positive?

No: ETG detects a metaboloite of alcohol. The modification occurs in the liver. If glucose is present in the urine that could get fermented into alcohol, but not into Etg as that requires an action by the liver. ...Read more

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Positive HIV screener test at blood donation... Negative IFA and Negative NAT... False positive?

Positive HIV screener test at blood donation... Negative IFA and Negative NAT... False positive?

Yes: The initial screening test for HIV is very sensitive, but not very specific. The back up screening tests are much more specific for HIV. ...Read more

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What causes false positive HCV antibody test results?

What causes false positive HCV antibody test results?

Misinformed?: Who told you that your hep c test was false? If you have no viral load that means you cleared an infection. Are you sure you are getting the right advice? ...Read more

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Recently bloodwork for fasting insulin. How is this different that a glucose tolerance test or a fasting glucose test?

Recently bloodwork for fasting insulin. How is this different that a glucose tolerance test or a fasting glucose test?

Different tests: Insulin & glucose are 2 different ways to measure diabetes. Insulin is produced by pancreas to keep sugars under control. We measure glucose to see how well sugars are controlled. Think of glucose as speedometer & Insulin as tachometer (hgba1c is avg trip speed - ask a car nut if this doesn't make sense). Glucose tolerance test requires drinking sugar whereas other 2 tests don't. ...Read more

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Hcg 50 positive blood test two negative urine please help.

Hcg 50 positive blood test two negative urine please help.

Recheck blood: You need to have the blood levels checked again. You expect the level to about double in 2 days with a normal pregnancy. ...Read more

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Is a random glucose blood sugar test accurate to diagnose diabetes?

Is a random glucose blood sugar test accurate to diagnose diabetes?

Random glucose >200: The ADA has set criteria for the diagnosis of diabetes as a patient with classic symptoms of hyperglycemia and a random glucose blood glucose > 200mg/dL http://www.diabetes.org/diabetes-basics/diagnosis/ ...Read more

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Are random blood sugar test for glucose accurate for diagnosing diabetes?

Are random blood sugar test for glucose accurate for diagnosing diabetes?

Not ideal: There are multiple tests for diabetes but preferred are fasting glucose and hemoglobin A1c levels. Generally, these are tested on two separate occasions to confirm the diagnosis unless the numbers are way out of range. Non-fasting glucose with symptoms suggestive of diabetes can be reliable. Take care. ...Read more

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Which test is more reliable for monitoring diabetes: a blood sugar test or urine sugar test?

Which test is more reliable for monitoring diabetes: a blood sugar test or urine sugar test?

Bllod sugar: Glucose appears in urine only when blood sugar is greater than (debate) 180-220. Would like to aim for sugars 80-150 for good control. So can still be in 150-180 range, chronically, and still be in less than ideal control without any sugar appearing in urine. ...Read more

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What is the difference between oral glucose tolerance test and modified glucose tolerance test?

THe modified: Test is simpler and shorter -- and used only in pregnant women, looking to diagnose gestational diabetes, or diabetes in pregnancy. ...Read more

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Does everyone need a 3 hour glucose tolerace test for gestational diabetes?

Does everyone need a 3 hour glucose tolerace test for gestational diabetes?

Newer recommendation: Is that non-diabetic pregnant women undergo a 2-hour 75-gram oral glucose tolerance test at 24-28 weeks of gestation. Women should be fasting for this test, and a fasting glucose level should be included. If any one of the following values are abnormal, you have gestational diabetes: fasting at 92 or above (mg/dl), one-hour at 180 or above, two-hour at 153 or above. ...Read more

Blood Sugar (Definition)

The blood sugar concentration or blood glucose level is the amount of glucose (sugar) present in the blood of a human or animal. The body naturally tightly regulates blood glucose levels as a part of metabolic homeostasis. Glucose is the primary source of energy for the body's cells, and blood lipids (in the form of fats and oils) are primarily ...Read more


Dr. Cayce Jehaimi
2,610 doctors shared insights

Glucose (Definition)

Glucose is the basic sugar molecule and the source of energy throughout the living kingdom. We are programmed to easily detect it by taste in our foods as it is desirable but can be overdone with the modern diet. It gets out of control ...Read more