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Doctor insights on: Test For Insulin

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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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Dr. Quang Nguyen
2,774 doctors shared insights

Insulin (Definition)

A hormone produced in the pancreas by the islets of langerhans that regulates the amount of ...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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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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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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Is a hemoglobin A1c test a conclusive test for diabetes?

Is a hemoglobin A1c test a conclusive test for diabetes?

If elevated, >6.5...: It equals diabetes but people can have nml (up to 5.6), or prediabetic range hga1c (5.7-6.4) and still have diabetes by blood sugar criteria; fasting 126 or >; 2 hour after eating =/>200. ...Read more

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Which blood test would I need to test for diabetes? Metabolic panel?

Which blood test would I need to test  for diabetes? Metabolic panel?

Diabetes testing: The current testing guidelines for type 2 diabetes are hemogloblobin A1c (over 6.5%), fasting blood glucose (>126) and 2 hr blood glucose (>200). Symptoms that suggest you need to be tested include symptoms of hyperglycemia (such as frequent urination, increased thirst, blurred vision) or hyperglycemic crisis with random plasma glucose ? 200 mg/dl. If this is you, see your doc right away. ...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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Took two, 3 hour glucose tolerance /insulin tests, one test had low blood sugar AND second test had high insulin both in the 3rd hour. How to treat?

Took  two, 3 hour glucose tolerance /insulin tests, one test had low blood sugar AND second test had high insulin both in the 3rd hour. How to treat?

Ignore it: and don't do the testing again. The GTT is NOT a valid test for hypoglycemia, and insulin levels are generally unreliable and meaningless. You are probably overweight with insulin resistance. Eat less, exercise more, and lose weight. ...Read more

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What are oral glucose test alternatives for gestational diabetes?

What are oral glucose test alternatives for gestational diabetes?

Not sure: What you're asking. The limited GTT is the gold standard for detecting gestational diabetes. Elevated blood sugars through other testing are also potentially useful, but some sort of testing is essential. ...Read more

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Is the A1c test an accurate test for detecting diabetes?

Is the A1c test  an accurate test for detecting diabetes?

Yes, it is.: The HgbA1C is a measure reflective of your degree of diabetic control in the long term. It essentially represents a three month average of your fingersticks, as if you took a fingerstick every minute, night and day, eating and fasting, for three months straight and then averaged them all. Technically, it's the percentage of red blood cells that have glucose attached to them. ...Read more

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Tested positive for heroin twice w/swab test. Never used! should I ask for blood and/or urine test?

Tested positive for heroin twice w/swab test. Never used! should I ask for blood and/or urine test?

Exercise your rights: Get legal counsel first. If an unknown enemy has administered heroin to you so that you will lose your job, then you will test positive and are in serious danger. A swab result alone can be false positive cannot be used against you since it must be confirmed with a second test using a different chemical principle. However, some dunce may not know this. I am sorry this is happening to you. ...Read more

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Can I have a false screening test for gestational diabetes ?

Can I have a false screening test for gestational diabetes ?

Yes: That is why the initial screening test for gestational diabetes (commonly known as the 1hr glucose test) is always followed up by a more extensive 3 hour test if the first one is positive. ...Read more

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For fasting lipid profile test how many hours of f fasting is required?

For fasting lipid profile test how many hours of f fasting is required?

8 hours is typical: Some doctors recommend nothing but water for 12 hours, and suggest that you should avoid fatty meals for 24-48 hours prior. Some doctors no longer require fasting at all. It could be argued that fasting doesn't represent the amount of lipid that is typically present in the blood, so it is less useful to look at fasting measures. Others think the post meal measurements are misleading. 8 hrs is fine ...Read more

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Why pregnant diabetics do fasting and pp test for sugar?

Why pregnant diabetics do fasting and pp test for sugar?

PREGNANT DIABETIC: It is more accurate to do lab .Diabetic pregnant mothers have big babies sometimes c/s has to be done during delivery. ...Read more

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What they test for in a drug test for insurance?

What they test for in a drug test for insurance?

Risk of disease: If you are talking about life insurance, they are interested in evidence of risk for early death. Testing for evidence of tabacco use, hiv/aids, elevated lipidis/cholesterol, diabetes and high blood pressure are common. You may still be able to get insurance, but the rates will be higher. ...Read more