Perfusion index as a means to measure peripheral temperature

[SteveT3]

Update: I am freezing, despite my room thermometer saying its 19c.

I had to put my heating on. Just to 20c.

I recent got an sp02 monitor which also measures perfusion index.

When I'm hot it shows as very high - 10, but now its like 0.2 - 0.3. That's is so low.

I suspect because of vasoconstriction due to my body not sufficiently warming up my peripherals. There doesn't seem to be any clear information on a low reading outside of really ill patients being a sign of hypothyroidism, but I suspect it is actually a very good implied monitor.

An aside, my perfusion index varies considerably where I hold my arm. It goes higher when my arm is raised, and lower if I have my arm rested by my side. I suspect circulation blockage which likely impair my peripherals from warming efficiently.

It made me consider testing my core body temperature.I would like to know the best way to monitor core body temperature. I'm all ears if anyone has any suggestions other than the usual thermometer you put in your mouth. Mine is typically 34c anyway and has dropped to 33c in the past.

Has anyone tried 'corebodytemp' sensor? or equivalent?

[SteveT3]

Note to self:

After some food and having my eating on, an hour later, and my hands feel warm now. My perfusion index has gone up to 4-5 on the right hand, and 5-6 on the left hand. borderline low but just bridging into normal.

[BeePurple in reply to SteveT3]

Have you had tests for hypothyroidism? Allegedly, my house was supposed to be 19 degrees too last night but I wasn't warm either. I have massive issues with cold in my hands, feet and head. I will wrap myself up in the evening and in bed when I feel like this. I was camping two weeks ago and wore fluffy pyjamas, a hoodie and socks on inside my sleeping bag and I also had to drape my dryrobe over the top of my sleeping bag to feel anywhere near warm.

[SteveT3 in reply to BeePurple]

My thyroid markers are in range so no official diagnoses. Recently had a blood test too, and before 9am, but my Anti-Thyroglobulin Antibody is 512. So way over the line.

My t3 to t4 ratio is 0.29 so also indicative.

TSH (0.35 - 5.5) 3.75

T4 (11.9 - 21.6) 17.8

T3 (3.1 - 6.8) 5.32

[FallingInReverse]

Basel temperature done right has been helpful for me. The trick is the get a 2 decimal place thermometer designed specifically for this purpose.

Our body temperature can indeed vary throughout the day. But Basel temp can be remarkably consistent, and therefore informative when it does change.

Plus, with elevated TGab, that’s a “diagnosis” but maybe you mean your free Ts havent tanked yet.

[SteveT3 in reply to FallingInReverse]

My nhs doctor doesn't diagnose it from my tgab. She told me they only measure that to monitor existing thyroid diagnoses. So right now I have wait until it tanks. Messed up isn't it.

[OG70sWildChild]

Hi Steve,

I’ve had hypothyroidism for going in 12 years now…I keep my house temp at 21 even in the summer time, seems to help but your still going to get temp swings, I’m so sorry for your health issues I wish I could help more🙏🏼🫶🏼🙏🏼bless you though darling, I hope this year is better than all the years of suffering before & that you can actually find a way to heal yourself❣️‼️❣️That’s what Ive been trying to do since I got I’ll 12 years ago.

Take care, never stop fighting for yourself❣️🫶🏽❣️& never never GIVE UP…ever‼️

Best wishes always,

Tracy😊