as you know by previous post ive been diagnosis of overactive and waiting another blood test in 3 weeks. I enclose all my tests last 3 years ive been really poorly with a cuti.
Also if i cant get early morn blood will it be ok if i have a light breakfast?
Thyroid test should be early morning and fasting. No food. I drink water before getting blood taken which makes it easier for them to draw blood.
Feb 2019
TSH 0.95
FT4 14
Feb 2000
TSH 0.65
FT4 13
August 2000
TSH 0.65
FT4 11.8
June 2021
TSH 1
FT4 12.7
July 2022 * have switch ranges, from written sheet
TSH 0.78 (0.35 - 4.94)
FT4 12.3 (9-19.1)
8 Sept 2022
TSH 0.9 (0.3-4.2)
FT4 27.6 (12 - 22)
15 sept 2022
TSH 0.80 (0.35 - 4.94)
FT4 13.3 (9 - 19.1)
You haven’t added the range for earlier results & they may not be same range but by most ranges your result looks in range.
Your TSH has been in range throughout between - 0.65 - 1 - which is very healthy & normal even when FT4 was high.
Your FT4 is fairly low by many ranges but this might be your normal.
Your only real anomaly is 8th September when you had a FT4: 27.6 pmol/l (Range 12 - 22) 156.00% of range.
Your TSH wasn’t low in range, you’d might expect a delayed response for TSH to alter , which is also normal, but a week later your FT4 was back to being low in range & consistent with previous results.
Once you had full test with FT3 & thyroid antibody we can advise more & you need some further monitoring after a high FT4 result.
You likely don’t remember the times of blood draw of all previous test, but even if the early September test was as a different time to all the other test it would explain away such a high result.
Ideally early morning is best as TSH is highest at this time before eating. If you can’t schedule - or wait to schedule a good time - then you have to bear in mind the doctor will be going by the results and they might show a different result than an ideal time.
This is more relevant to hypothyroid who take replacement. Lower the TSH in range the more likely the Dr will say replacement levels sufficient.
If TSH is tested at daily highest this might be difference between being in range or above it.
You also aren’t going to be affected by a dose which temporarily increases levels, so those on replacement need to delay dose until after draw to show a daily low level. Your TSH has been consistently just under 1 so doctors should know it’s your FT4 (& ideally FT3) which need to be looked at.
My ft4 went down when i been on the beta blockers for a week. So what do you mean the drs need to look at ft4 and f3 its all new to me? Im hoping the medicheck tests may give me more answers.
Propranolol even at high dose wouldn’t bring down FT4 by that extent. It will help any associated symptoms but only has a fractional antithyroid action.That has occurred naturally & very quickly.
The TSH (thyroid stimulating hormone) is a pituitary hormone. It signals thyroid to produce so if everything is working as it should a normal TSH *should* mean a normal thyroid hormones (TSH isn’t reliable)
The thyroid produces T4 (thyroxine) & a tiny quantity of T3 (triiodothyronine) most T3 is converted from T4 but they should usually be well balanced. These are the actual thyroid hormones.
FT3 is the more powerfully active hormone. Patients feel it’s the most important measurement & governs symptoms by greatest factor, but doctors say it’s the last variable to alter and prefer to focus on TSH.
The most useful test is the free unbound (available to use) levels of T4 & T3 (FT4 & FT3)
It’s possible for FT4 & FT3 to be out of kilter with FT3 being very low or high in comparison to FT4. Ideal TSH, FT4 & FT3 should always be tested together.
Thankyou when i get my medicheck results i will post on here for advice as struggling to understand it all
start new post with any new result.
The explanations Medichecks give are standard but we can explain what you need to know.
The Trab might take longer than other tests.
Past test results
Questions about TSH and advice on results over the past year much appreciated
trying to understand thyroid results
Unsettled thyroid results
Thyroid results suggest overactive thyroid?
