Not a stupid question. A low reading means the blood is too thick. A persons INR without being on blood thinners is usually about 1 to 1.5. If the INR gets too low then your at risk to develop blood clots with mechanical valves.
The lower the number, the less you are anticoagulated. For example, a person who is not on coumadin will have an INR of around 1.0. Coumadin does not make your blood thinner only less able to form clots.
If your INR is too low, then you may form a clot that can cause a stroke. If your INR is too high, you could suffer an internal or external bleed. Coumadin/Warfarin does not "thin" blood, it interrupts the coagulation cascade which keeps clots from forming. If you want more info on this, I may be able to locate some short articles for you.
Kind regards,
Blanche
Al Lodwick's informative website www.warfarinfo.com should tell you just about everything you ever will want to know about Coumadin and it's effects and how to successfully live with it.
Nope, this wasn't a stupid question.
You're relatively new to anticoagulation therapy and have embarked on a steep learning curve.
Don't worry about any question seeming foolish -- ask away. That's what we're here for! We all learn from each other.
Think of warfarin like gas for your car. The more you take, the higher the number will go. If you stop taking warfarin you get no protection - just like a car won't go if you don't give it gas.