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What else can I help you with?
What medications should be avoided before a TBG test?
Estrogens, anabolic steroids, phenytoin, and thyroid medications may be discontinued prior to a thyroxine-binding globulin (TBG) test.
what is the normal level?
what is the normal sugar level
What is normal sugar level?
between 70 to150
what is the normal sugar level?
what is normal sugar level
How do you figure out what is a normal cholesterol level?
WHAT IS THE NORMAL CHOLESTEROL LEVEL?
Is 118 a normal sugar level?
What is a normal sugar level?
What is a normal liver alt level?
What is a normal liver alt level?
What is the normal water level?
normal for WHAT (where)?
What is a modern level?
A normal level.
What is the normal pH level in lakes?
7.1985 is the normal or apreciated pH level in water
What is normal serum creatinine level in males in India?
what is the normal creatinine level for male
Serum TBG level?
DefinitionSerum TBG level is a blood test to measure the level of a protein that moves thyroid hormone throughout your body. The protein is called thyroxine binding globulin (TBG).Alternative NamesSerum thyroxine binding globulin; TBG levelHow the test is performedBlood is drawn from a vein, usually from the inside of the elbow or the back of the hand. The site is cleaned with germ-killing medicine (antiseptic). The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood.Next, the health care provider gently inserts a needle into the vein. The blood collects into an airtight vial or tube attached to the needle. The elastic band is removed from your arm.Once the blood has been collected, the needle is removed, and the puncture site is covered to stop any bleeding.The sample is then taken to the laboratory where it is examined using special tests such as electrophoresis or radioimmunoassay.How to prepare for the testCertain drugs and medicines can affect test results. Your doctor may tell you to temporarily stop taking a certain medicine before the test. Never stop taking any medicine without first talking to your doctor.The following drugs can increase TBG levels:Estrogens, found in birth control pills and estrogen replacement therapyHeroinMethadonePhenothiazinesThe following drugs can decrease TBG levels:Depakote or depakene (also called valproic acid)Dilantin (also called phenytoin)High doses of salicylates, including aspirinMale hormones, including androgens and testosteronePrednisoneCertain medical conditions may also affect TBG levels. For example, TBG results may be increased in people with acute intermittent porphyria, HIV, or severe liver disease. They may be reduced in people with kidney failure or liver disease.How the test will feelWhen the needle is inserted to draw blood, you may feel moderate pain, or only a prick or stinging sensation. Afterward, there may be some throbbing.Why the test is performedThis test may be done to diagnose problems with your thyroid, including thyroid disorders such as hypothyroidism.Normal ValuesIf electrophoresis is used, normal values may range from 10 mg/100 mL - 24 mg/100 mL.If radioimmunoassay is used, then a normal range is 1.3 - 2.0 mg/100 mL.Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.The examples above show the common measurements for results for these tests. Some laboratories use different measurements or may test different specimens.What abnormal results meanIncreased TBG levels may be due to:Acute intermittent porphyriaHypothyroidismLiver diseasePregnancy (TBG levels are normally increased during pregnancy.)Note: TBG levels are normally high in newborns.Decreased TBG levels may be due to:AcuteillnessAcromegalyHyperthyroidismMalnutritionNephrotic syndromeStress from surgeryWhat the risks areVeins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.Other risks associated with having blood drawn are slight but may include:Excessive bleedingFainting or feeling light-headedHematoma (blood accumulating under the skin)Infection (a slight risk any time the skin is broken)Reviewed ByReview Date: 05/10/2010Frank A. Greco, MD, PhD, Director, Biophysical Laboratory, The Lahey Clinic, Burlington, MA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
