twinmaker
Well-known member
I have a question. On Thursday, I had my INR done at the lab and the result was a reading of 3.7. Today, I tested on my INRatio machine and the result was 4.6. Is there usually a difference between the lab and the home testing results? This was the first time that I've tested at home and was wanting to try out the machine and this was the reading that I came up with. Did I do something wrong? My instructions said not to press extremely hard on your finger and this may dilute the sample of blood and give inaccurate results. I didn't think that I did this but if I did, would it cause the INR to go that high? Thanks for any help. Linda