oh, one more point: if you're testing weekly rather than monthly then if there is a trend up you will know about it earlier. Don't panic and over correct just watch it (perhaps test again mid week if you're worried / curious as it only costs $5) it might just trend back down of its own accord.
For instance, this is a subset of my measurements from 2013
Over this period (and probably still) I'm dealing with an infection and I am on antibiotics.
Firstly there is a trend line in that graph, it shows the 2 week average of my INR (measured weekly). Its clear that not only has my INR been within range (my surgeon gave me a range of 2.2 ~ 3) but my TREND is much more clearly in range.
Now as to why to not over steer things: you can see at week 22 my INR had grown up from 2.2 to 2.5 then to 2.7 ... I decided to make an alteration in dose from 7.5mg down only a small amount to 7.3 and it dropped so I raised my dose the next week up to 7.5 again and it spiked over 3. I then over reacted and dropped my dose to 6.9mg and it plummeted the next week to 1.9 ... I went back to 7.3 and just waited. I then decided to take a more 'trend line approach' and you can see that while variant my INR trended nicely over the next 10 weeks (with a stable dose of 7.3).
Then at week 30 I measured 2.2 and observed a trend down. I decided to hold steady my dose and measure again mid week (I call this an ad-hoc measurement in my excel workbook) and found that on Wednesday (my usual testing day is Sat) it was trending back up by itself. So I did nothing to adjust my dose.
This is what I believe is classic 'see-saw' effect and comes from inappropriate changes in dose combined with what cycles are happening within your body. Sometimes they cancel out, other times they accentuate each other. Imagine if I'd been at a clinic who had suggested a greater variation of dose?
{
Actually I don't have to imagine I went through that in 2012}
So my points are these:
- don't try to over steer your INR or you'll make the whole thing worse
- there are natural variants, accept them and look for longer trends not absolute values
Problems emerging from INR being high or low are typically related to very high swings or lengthy times a long way from your target INR.
So eat as you desire and don't fret if your INR is "
away from school" for a few days.