Hi, I was due to have an operation this week but it was cancelled on Friday as the hospital said my FT4 level was too high at 17.4 (range 7.8 - 14.4). I spoke to my GP who is in a different NHS trust and she requested a blood test, the results of which were TSH 0.20 (range 0.35 - 5.5) FT4 18.4 (range 9 - 22.7). GP said that although TSH was low as I am feeling ok on a dose of 125 then she didn't see why the hospital would have a problem.
Anyway, my consultant has pushed for my op to be rescheduled as he is pretty miffed that the anaethetist cancelled it and I have been booked in for 14th May on the understanding that I reduce my FT4 and increase my TSH to keep the anaethetist happy!
I reduced my levothyroxine dose to 100 last Friday and am due to have a pre op blood test for the operation on 7th May. Will the reduction in my dose show up in a blood test just over 4 weeks later?? I'm not sure how long a change of dose takes to work.