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What Can You Have Before A Fasting Blood Test
Yes it will: To diagnose Hypothyroidism you do not have to fast,but if your blood was collected while fasting for some other reason it is ok/And will tell if you have Hypothyroidism as long as you are tested for it.You need T3T4FreeT4 and TSH level done on fasting or non fasting specimen ...Read more
Yes, absolutely: Hi. Yes, a fasting serum glucose is easily diagnostic of diabetes. There are 4 means of diagnosing diabetes: fasting serum glucose, random serum glucose, 2-hr glucose tolerance test, and A1c. Fasting glucose is an easy test, and if positive, should be repeated for confirmation. Eat healthily and exercise regularly. Keep your diabetes, blood pressure, and lipids well controlled. DON'T SMOKE! ...Read more
Needs confirmation: A single fasting blood sugar over 125 needs confirmatory tests to diagnose diabetes. this can be a second fasting blood sugar over 125, or a Hemoglobin A1c test over 6.5%. However any sugar over 300, or any sugar over 200 associated with vision change, excessive thirst or urination, or weight loss while eating more than usual is diagnostic for diabetes without a need for confirmatory testing. ...Read more
Can you tell me if i get a blood test for mono, will that same blood test also reveal if I have hiv?
Eight to Twelve: Eight to twelve hours should suffice.Get a more detailed answer ›
See below: There is no such thing as a negative blood type. I think you mean the rhesus factor is negative, as in A- vs. A+. The negative doesn't mean much except when the father of a developing fetus is positive and the mother is negative. On a subsequent pregnancy, it can cause problems for the fetus but this is prevented with a medicine called Rhogam. ...Read more
Post-prandial result: Although most blood tests are supposed to be done in the fasting state, the after-meal (or post-prandial) glucose result can be very useful in certain settings. If you have diabetes and do a blood test after eating, the result can help determine whether you are eating too much carbs or need medication adjustments. American diabetes assn recommends a post-prandial glucose target less than 180 mg/dl. ...Read moreSee 1 more doctor answer
What will happen if you have a negative blood type and your bf had a positive blood type during a pregnancy?
Rh negative: If a woman is Rh negative, and the father of her baby is Rh positive, there is a good chance that their baby will be Rh positive. When a Rh neg mom carries a Rh pos baby, there is a good chance that at some point during the pregnancy, their blood will mix and cause the mom's blood to make antibodies which attack the babies blood causing anemia. Mom's take rhogam to prevent this. ...Read more
Fasting is: Not required.Get a more detailed answer ›
Liver enzymes: Elevated liver enzymes can be a sign of fatty liver (and this is common), but this typically has to be confirmed because there are many things that can cause elevated liver enzymes. Usually an ultrasound or ct will confirm large amounts of fat deposits in the liver. ...Read moreSee 1 more doctor answer
Blood tests & eating: Only a few blood tests require that you be fasting--most particularly tests for sugar (glucose) and a lipid panel (because the triglycerides go very high after eating. Most other tests do not require a fasting state--including electrolytes, thyroid tests, liver tests, total cholesterol & HDL cholesterol, kidney function, and blood counts. ...Read moreSee 2 more doctor answers
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