"Coumadin Manager?" In my brief experience the last 14 months going to an 'Anticoagulation Clinic,' I've been very negatively impressed by the entire experience. I can't completely fault the people there - they mean well. In my case, they're following some stupid protocols that limit what they can do, and what they can advise. At the clinic where I go, they're content with testing once a month, as long as your INR AT THAT INSTANT is within range. It could be ANYWHERE between tests, but as long as it's in range that one time a month that they test it, this is fine with them.
They prohibited me from testing my own blood at home -- but at least they couldn't go to my house and confiscate my meters. During the times between tests, my INR has been up and down - this probably happens to all of us - but they would never know this by taking tests once a month.
Now, they'll let me use my own meter -- I just have to BRING IT TO THE HOSPITAL and LET THEM TEST IT and IF THEY FIND IT ACCEPTABLE, THEY'LL ENROLL ME IN A PHILIPS PROGRAM. They apparently assume that everyone who takes warfarin is just TOO DAMNED STUPID to report results to a 'professional.' God forbid if they actually try to MANAGE their own INR.
Now, this 'clinic' may be deciding that the protocol for a mechanical Aortic valve (like the one that I have) should be in a range of 2.0-3.0. It doesn't matter to them that there's an inherent range - even with lab testing - of about .2-.3. They can't understand how a 2.0 reported by a lab may actually be more like 1.7 -- putting you at risk of stroke.
I realize that I'm no longer talking about shaving with razor versus electric razor. I'm concerned that many of us put our lives into the hands of these 'professionals' who are following outdated rules and myths. For myself, I test weekly. Other than testing every four days (which is a bit excessive, though little more than just a minimal pain in the finger), there's little better way to confirm that my INR is in range. I rarely make any changes in medication - but have when my INR dropped below 2.0. I've been careful to be conservative with dosing changes, tried to calculate my weekly dosage into equal dosages from day to day, and am a lot more comfortable than I would be with these 'clinics' or 'professionals.'
This isn't bragging. I'm making no claims of superiority. I just feel that I'm in better hands when I'm in my own hands than when I trust my anticoagulation to others who are content with monthly (or bi-monthly) testing, and who might even insist on a new range that, to me, seems to be ASKING for trouble. Personally, I feel a lot more comfortable at the high end of my range than I do anywhere near the low end.
Get yourself a meter. Test weekly. I hope that your MD is comfortable with self-testing. Shave (or don't shave) with whatever device you are most comfortable using (but be careful).
I'm sure that others here will agree with the absolute value of self-testing. I'm sure that many would agree with the benefit of weekly testing (versus monthly or less frequent testing).