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Doctor insights on: Tsh Cascading Reflex

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What is the definition or description of: TSH cascading reflex?

What is the definition or description of: TSH cascading reflex?

TSH cascading: If you are talking about the laboratory tsh cascade only means that if the TSH is abnomal it automatically triggers the lab to perform additional testing such as t4. I prefer to order the testing as i watch my patients free T4 and free T3 along with the tsh. ...Read more

Dr. Quang Nguyen
876 doctors shared insights

Thyroid Stimulating Hormone (Definition)

A TSH test measures the amount of thyroid stimulating hormone (TSH) in your blood. TSH is produced by the pituitary gland and tells the thyroid gland to make and release the hormones thyroxine ...Read more


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Tsh w/ reflex test read 1.20 and the range was 0.27- 4.20. Is this low norm or healthy norm? I was already diagnosed with hypo earlier this yr.

Tsh w/ reflex test read 1.20 and the range was 0.27- 4.20. Is this low norm or healthy norm? I was already diagnosed with hypo earlier this yr.

Need more info: The TSH level needs to be looked at in the context of your other thyroid levels. If you are not on any medication this might be interpreted as normal but your level of free T4 and free T3 as well as your thyroid antibodies need to be analyzed as well. If your free T4 and/or free T3 levels are low, then the TSH level might not be reflecting exactly what is going on with your thyroid. ...Read more

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What is a "tsh reflex" test?

Weird terminology: As best i can tell, it is just a TSH with ft4. Not sure why someone calls it "tsh reflex". Maybe the lab does the tsh, and then does the ft4 if the TSH is abnormal. ...Read more

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Tsh, 3rd generation with reflex is 0.46 - what does this mean?

Not a problem: Although a TSH of 0.46 is slightly below the normal range, I have never seen a patient with a similar TSH who needed any treatment. Most likely your T4 level is fine and i would view the TSH as a normal variation which has no significance for your health. ...Read more

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IF MY TSH W/ REFLEX TO FT4 IS 5.05 WHAT NEEDS TO BE DONE TO LOWER IT?

IF MY TSH W/ REFLEX TO FT4  IS  5.05 WHAT NEEDS  TO  BE  DONE  TO LOWER IT?

Hypothyroidism: Normal TSH is typically 0.45-4.5. Best to discuss results w/ordering physician as some labs have different reference ranges. Regardless, if you have signs & symptoms of hypothyroidism (underactive thyroid = http://www.mayoclinic.org/diseases-conditions/hypothyroidism/basics/definition/con-20021179), prescription levothyroxine will help relieve symptoms but requires close & regular monitoring. ...Read more

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My TSH Reflex Order is 0.23 mcIU/mL (0.55 mcIU/mL - 4.78 mcIU/mL). Are these results normal? I'm currently not taking any medications. Thank you!

TSH is mildly: low, but since TSH is secreted in pulses, one lab result does not make a diagnosis. Have it repeated at your convenience along with a free T4 and have your doctor review any potential signs/symptoms of thyroiditis or other thyroid disease. ...Read more

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My TSH W/REFLEX TO FT4 result is 0.67. I am 52 and female. What does this mean?

My TSH W/REFLEX TO FT4 result is 0.67. I am 52 and female. What does this mean?

Normal: That's a normal value. That's why they didn't have to run the free t4. Reflex means they will run ft4 only if tsh is abnormal. ...Read more

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Tsh with reflex to FT4 with resulting 2.09 value. What does this mean? Thanks for your help!

Normal: A TSH of 2.09 is normal. Reflex to FT4 means that if the TSH was abnormal the lab would have automatically done further testing by doing a free T4 (FT4) level. Since the TSH was normal, no further testing was done. ...Read more

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My tsh, w/reflex to FT4 results was 4.53 and a month later was 4.49. Do I neef to be on medication?

My tsh, w/reflex to FT4 results was 4.53 and a month later was 4.49. Do I neef to be on medication?

It is better: if you stay on it for a while. Endocrinologist like tsh between .3-3 not .5-5. Discuss with your doctor and see what your doctor will say. ...Read more

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Is TSH w/reflex to ft4 4.06 normal?

High normal: A TSH of 4.06 is in the upper range of normal. The lab probably did not do the ft4 level, since the TSH was normal. Most people with these results feel perfectly normal. However, it could be a sign that your thyroid is starting to fail. It would be reasonable to repeat the TSH and do a free T4 level in a few months. ...Read more