Did The Hot Weather Cause A Jump In My INR?
The last few readings of my INR have been.
Monday, July 8th – 3.2
Sunday, July 7th – 2.3
Saturday, July 6th – 2.4
Friday, July 5th – 2.6
Thursday, July 4th – 2.3
Wednesday, July 3rd – 2.2
Tesday, July 2nd – 2.5
Monday, July 1st – 2.8
Sunday, June 30th – 2.6
Saturday, June 29th – 2.6
I don’t think anybody would complain at those figures, as I’m supposed to keep the INR between 2 and 3, with a target value of 2.5.
I know from past experience, that in the summer, my Warfarin level is around 4 mg. a day. So generally, I take this amount every day, but if the INR is 2.8 or over, I take 3 mg. and if it is 2.2 or under I take 5 mg. It is a classic simple algorithm of the type I learned at Liverpool University in my degree in Control Engineering.
But notice how today, after the very hot and sunny day yesterday, my INR rose sharply. I shall be watching the figures intently.
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The Anonymous Widower 
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