Any Medical People On Here Please.

[fruitsalad]

I had a sleep test quite a while ago, well before the lockdown, the machine seemed to fall off more than stay on, then last week I had a 'copy' of a letter sent to my doctor from the hospital, to say the sleep study, showed an AHI of 20.4 with a mean saturation of 94% and that interestingly she has more central apnoea than obstructive apnoea or hypopneas They want me to have a blood test for thyroid, although I'm already on thyroxine for an underactive thyroid, also a head CT scan and an echocardiogram, the bit I do not understand is what the thyroid has to do with sleep apnoeas.

[Cloverjo]

I’m not a medical person but I found this. Might be helpful.
https://www.sleepfoundation.org/articles/your-thyroid-blame-your-sleep-issues

[Sqad]

In an underactive thyroid O2 levels in the blood may be low and as you are on thyroid tablet's it may well be that your sleep test would indicate that you are not taking enough thyroid and that your dose needs increasing.
A blood test will give the answer.
I haven't opened Cloverjos link, ut I apologise if I have reiterated it's contents.

[Peter Pedant]

what is an AHI ?

The AHI is the number of apneas or hypopneas recorded during the study per hour of sleep. It is generally expressed as the number of events per hour. Based on the AHI, the severity of OSA is classified as follows: None/Minimal: AHI < 5 per hour.

I would take any tests they offer to be honest

[fruitsalad]

Thanks all

[fruitsalad]

its funny you should say that Sqad, as when the sleep test was taken I was on 100mg of Tyroxine, but after a blood test some weeks later, it was raised to 125 so maybe at the time of the sleep test it was to low a dose.

[Sqad]

Maybe! maybe!